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.\" ========================================================================
.\"
.IX Title "AS 1"
.TH AS 1 2026-02-08 binutils-2.46 "GNU Development Tools"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH NAME
AS \- the portable GNU assembler.
.SH SYNOPSIS
.IX Header "SYNOPSIS"
as [\fB\-a\fR[\fBcdghilns\fR][=\fIfile\fR]]
 [\fB\-\-alternate\fR]
 [\fB\-\-compress\-debug\-sections\fR] [\fB\-\-nocompress\-debug\-sections\fR]
 [\fB\-D\fR]
 [\fB\-\-dump\-config\fR]
 [\fB\-\-debug\-prefix\-map\fR \fIold\fR=\fInew\fR]
 [\fB\-\-defsym\fR \fIsym\fR=\fIval\fR]
 [\fB\-\-elf\-stt\-common=[no|yes]\fR]
 [\fB\-\-emulation\fR=\fIname\fR]
 [\fB\-f\fR]
 [\fB\-g\fR] [\fB\-\-gstabs\fR] [\fB\-\-gstabs+\fR]
 [\fB\-\-gdwarf\-<N>\fR] [\fB\-\-gdwarf\-sections\fR]
 [\fB\-\-gdwarf\-cie\-version\fR=\fIVERSION\fR]
 [\fB\-\-generate\-missing\-build\-notes=[no|yes]\fR]
 [\fB\-\-gsframe\fR] [\fB\-\-gsframe=[no|yes]\fR]
 [\fB\-\-gsframe\-3\fR]
 [\fB\-\-hash\-size\fR=\fIN\fR]
 [\fB\-\-help\fR] [\fB\-\-target\-help\fR]
 [\fB\-\-info\fR] [\fB\-\-no\-info\fR]
 [\fB\-I\fR \fIdir\fR]
 [\fB\-J\fR]
 [\fB\-K\fR]
 [\fB\-\-keep\-locals\fR]
 [\fB\-L\fR]
 [\fB\-\-listing\-lhs\-width\fR=\fINUM\fR]
 [\fB\-\-listing\-lhs\-width2\fR=\fINUM\fR]
 [\fB\-\-listing\-rhs\-width\fR=\fINUM\fR]
 [\fB\-\-listing\-cont\-lines\fR=\fINUM\fR]
 [\fB\-\-multibyte\-handling=[allow|warn|warn\-sym\-only]\fR]
 [\fB\-\-no\-pad\-sections\fR]
 [\fB\-o\fR \fIobjfile\fR] [\fB\-R\fR]
 [\fB\-\-scfi=experimental\fR]
 [\fB\-\-sectname\-subst\fR]
 [\fB\-\-size\-check=[error|warning]\fR]
 [\fB\-\-statistics\fR]
 [\fB\-v\fR] [\fB\-\-verbose\fR]
 [\fB\-version\fR] [\fB\-\-version\fR]
 [\fB\-W\fR] [\fB\-\-no\-warn\fR] [\fB\-\-warn\fR] [\fB\-\-fatal\-warnings\fR]
 [\fB\-w\fR] [\fB\-x\fR]
 [\fB\-Z\fR] [\fB@\fR\fIFILE\fR]
 [\fItarget\-options\fR]
 [\fB\-\-\fR|\fIfiles\fR ...]
.SH TARGET
.IX Header "TARGET"
\&\fITarget AArch64 options:\fR
   [\fB\-EB\fR|\fB\-EL\fR]
   [\fB\-mabi\fR=\fIABI\fR]
.PP
\&\fITarget Alpha options:\fR
   [\fB\-m\fR\fIcpu\fR]
   [\fB\-mdebug\fR | \fB\-no\-mdebug\fR]
   [\fB\-replace\fR | \fB\-noreplace\fR]
   [\fB\-relax\fR] [\fB\-g\fR] [\fB\-G\fR\fIsize\fR]
   [\fB\-F\fR] [\fB\-32addr\fR]
.PP
\&\fITarget ARC options:\fR
   [\fB\-mcpu=\fR\fIcpu\fR]
   [\fB\-mA6\fR|\fB\-mARC600\fR|\fB\-mARC601\fR|\fB\-mA7\fR|\fB\-mARC700\fR|\fB\-mEM\fR|\fB\-mHS\fR]
   [\fB\-mcode\-density\fR]
   [\fB\-mrelax\fR]
   [\fB\-EB\fR|\fB\-EL\fR]
.PP
\&\fITarget ARM options:\fR
   [\fB\-mcpu\fR=\fIprocessor\fR[+\fIextension\fR...]]
   [\fB\-march\fR=\fIarchitecture\fR[+\fIextension\fR...]]
   [\fB\-mfpu\fR=\fIfloating\-point\-format\fR]
   [\fB\-mfloat\-abi\fR=\fIabi\fR]
   [\fB\-meabi\fR=\fIver\fR]
   [\fB\-mthumb\fR]
   [\fB\-EB\fR|\fB\-EL\fR]
   [\fB\-mapcs\-32\fR|\fB\-mapcs\-26\fR|\fB\-mapcs\-float\fR|
    \fB\-mapcs\-reentrant\fR]
   [\fB\-mthumb\-interwork\fR] [\fB\-k\fR]
.PP
\&\fITarget Blackfin options:\fR
   [\fB\-mcpu\fR=\fIprocessor\fR[\-\fIsirevision\fR]]
   [\fB\-mfdpic\fR]
   [\fB\-mno\-fdpic\fR]
   [\fB\-mnopic\fR]
.PP
\&\fITarget BPF options:\fR
   [\fB\-EL\fR] [\fB\-EB\fR]
.PP
\&\fITarget CRIS options:\fR
   [\fB\-\-underscore\fR | \fB\-\-no\-underscore\fR]
   [\fB\-\-pic\fR] [\fB\-N\fR]
   [\fB\-\-emulation=criself\fR | \fB\-\-emulation=crisaout\fR]
   [\fB\-\-march=v0_v10\fR | \fB\-\-march=v10\fR | \fB\-\-march=v32\fR | \fB\-\-march=common_v10_v32\fR]
.PP
\&\fITarget C\-SKY options:\fR
   [\fB\-march=\fR\fIarch\fR] [\fB\-mcpu=\fR\fIcpu\fR]
   [\fB\-EL\fR] [\fB\-mlittle\-endian\fR] [\fB\-EB\fR] [\fB\-mbig\-endian\fR]
   [\fB\-fpic\fR] [\fB\-pic\fR]
   [\fB\-mljump\fR] [\fB\-mno\-ljump\fR]
   [\fB\-force2bsr\fR] [\fB\-mforce2bsr\fR] [\fB\-no\-force2bsr\fR] [\fB\-mno\-force2bsr\fR]
   [\fB\-jsri2bsr\fR] [\fB\-mjsri2bsr\fR] [\fB\-no\-jsri2bsr\fR ] [\fB\-mno\-jsri2bsr\fR]
   [\fB\-mnolrw\fR ] [\fB\-mno\-lrw\fR]
   [\fB\-melrw\fR] [\fB\-mno\-elrw\fR]
   [\fB\-mlaf\fR ] [\fB\-mliterals\-after\-func\fR]
   [\fB\-mno\-laf\fR] [\fB\-mno\-literals\-after\-func\fR]
   [\fB\-mlabr\fR] [\fB\-mliterals\-after\-br\fR]
   [\fB\-mno\-labr\fR] [\fB\-mnoliterals\-after\-br\fR]
   [\fB\-mistack\fR] [\fB\-mno\-istack\fR]
   [\fB\-mhard\-float\fR] [\fB\-mmp\fR] [\fB\-mcp\fR] [\fB\-mcache\fR]
   [\fB\-msecurity\fR] [\fB\-mtrust\fR]
   [\fB\-mdsp\fR] [\fB\-medsp\fR] [\fB\-mvdsp\fR]
.PP
\&\fITarget D10V options:\fR
   [\fB\-O\fR]
.PP
\&\fITarget D30V options:\fR
   [\fB\-O\fR|\fB\-n\fR|\fB\-N\fR]
.PP
\&\fITarget EPIPHANY options:\fR
   [\fB\-mepiphany\fR|\fB\-mepiphany16\fR]
.PP
\&\fITarget H8/300 options:\fR
   [\-h\-tick\-hex]
.PP
\&\fITarget i386 options:\fR
   [\fB\-\-32\fR|\fB\-\-x32\fR|\fB\-\-64\fR] [\fB\-n\fR]
   [\fB\-march\fR=\fICPU\fR[+\fIEXTENSION\fR...]] [\fB\-mtune\fR=\fICPU\fR]
.PP
\&\fITarget IA\-64 options:\fR
   [\fB\-mconstant\-gp\fR|\fB\-mauto\-pic\fR]
   [\fB\-milp32\fR|\fB\-milp64\fR|\fB\-mlp64\fR|\fB\-mp64\fR]
   [\fB\-mle\fR|\fBmbe\fR]
   [\fB\-mtune=itanium1\fR|\fB\-mtune=itanium2\fR]
   [\fB\-munwind\-check=warning\fR|\fB\-munwind\-check=error\fR]
   [\fB\-mhint.b=ok\fR|\fB\-mhint.b=warning\fR|\fB\-mhint.b=error\fR]
   [\fB\-x\fR|\fB\-xexplicit\fR] [\fB\-xauto\fR] [\fB\-xdebug\fR]
.PP
\&\fITarget IP2K options:\fR
   [\fB\-mip2022\fR|\fB\-mip2022ext\fR]
.PP
\&\fITarget M32C options:\fR
   [\fB\-m32c\fR|\fB\-m16c\fR] [\-relax] [\-h\-tick\-hex]
.PP
\&\fITarget M32R options:\fR
   [\fB\-\-m32rx\fR|\fB\-\-[no\-]warn\-explicit\-parallel\-conflicts\fR|
   \fB\-\-W[n]p\fR]
.PP
\&\fITarget M680X0 options:\fR
   [\fB\-l\fR] [\fB\-m68000\fR|\fB\-m68010\fR|\fB\-m68020\fR|...]
.PP
\&\fITarget M68HC11 options:\fR
   [\fB\-m68hc11\fR|\fB\-m68hc12\fR|\fB\-m68hcs12\fR|\fB\-mm9s12x\fR|\fB\-mm9s12xg\fR]
   [\fB\-mshort\fR|\fB\-mlong\fR]
   [\fB\-mshort\-double\fR|\fB\-mlong\-double\fR]
   [\fB\-\-force\-long\-branches\fR] [\fB\-\-short\-branches\fR]
   [\fB\-\-strict\-direct\-mode\fR] [\fB\-\-print\-insn\-syntax\fR]
   [\fB\-\-print\-opcodes\fR] [\fB\-\-generate\-example\fR]
.PP
\&\fITarget MCORE options:\fR
   [\fB\-jsri2bsr\fR] [\fB\-sifilter\fR] [\fB\-relax\fR]
   [\fB\-mcpu=[210|340]\fR]
.PP
\&\fITarget Meta options:\fR
   [\fB\-mcpu=\fR\fIcpu\fR] [\fB\-mfpu=\fR\fIcpu\fR] [\fB\-mdsp=\fR\fIcpu\fR]
\&\fITarget MICROBLAZE options:\fR
   [\fB\-mlittle\-endian\fR] [\fB\-mbig\-endian\fR]
.PP
\&\fITarget MIPS options:\fR
   [\fB\-nocpp\fR] [\fB\-EL\fR] [\fB\-EB\fR] [\fB\-O\fR[\fIoptimization level\fR]]
   [\fB\-g\fR[\fIdebug level\fR]] [\fB\-G\fR \fInum\fR] [\fB\-KPIC\fR] [\fB\-call_shared\fR]
   [\fB\-non_shared\fR] [\fB\-xgot\fR [\fB\-mvxworks\-pic\fR]
   [\fB\-mabi\fR=\fIABI\fR] [\fB\-32\fR] [\fB\-n32\fR] [\fB\-64\fR] [\fB\-mfp32\fR] [\fB\-mgp32\fR]
   [\fB\-mfp64\fR] [\fB\-mgp64\fR] [\fB\-mfpxx\fR]
   [\fB\-modd\-spreg\fR] [\fB\-mno\-odd\-spreg\fR]
   [\fB\-march\fR=\fICPU\fR] [\fB\-mtune\fR=\fICPU\fR] [\fB\-mips1\fR] [\fB\-mips2\fR]
   [\fB\-mips3\fR] [\fB\-mips4\fR] [\fB\-mips5\fR] [\fB\-mips32\fR] [\fB\-mips32r2\fR]
   [\fB\-mips32r3\fR] [\fB\-mips32r5\fR] [\fB\-mips32r6\fR] [\fB\-mips64\fR] [\fB\-mips64r2\fR]
   [\fB\-mips64r3\fR] [\fB\-mips64r5\fR] [\fB\-mips64r6\fR]
   [\fB\-construct\-floats\fR] [\fB\-no\-construct\-floats\fR]
   [\fB\-mignore\-branch\-isa\fR] [\fB\-mno\-ignore\-branch\-isa\fR]
   [\fB\-mnan=\fR\fIencoding\fR]
   [\fB\-trap\fR] [\fB\-no\-break\fR] [\fB\-break\fR] [\fB\-no\-trap\fR]
   [\fB\-mips16\fR] [\fB\-no\-mips16\fR]
   [\fB\-mmips16e2\fR] [\fB\-mno\-mips16e2\fR]
   [\fB\-mmicromips\fR] [\fB\-mno\-micromips\fR]
   [\fB\-msmartmips\fR] [\fB\-mno\-smartmips\fR]
   [\fB\-mips3d\fR] [\fB\-no\-mips3d\fR]
   [\fB\-mdmx\fR] [\fB\-no\-mdmx\fR]
   [\fB\-mdsp\fR] [\fB\-mno\-dsp\fR]
   [\fB\-mdspr2\fR] [\fB\-mno\-dspr2\fR]
   [\fB\-mdspr3\fR] [\fB\-mno\-dspr3\fR]
   [\fB\-mmsa\fR] [\fB\-mno\-msa\fR]
   [\fB\-mxpa\fR] [\fB\-mno\-xpa\fR]
   [\fB\-mmt\fR] [\fB\-mno\-mt\fR]
   [\fB\-mmcu\fR] [\fB\-mno\-mcu\fR]
   [\fB\-mcrc\fR] [\fB\-mno\-crc\fR]
   [\fB\-mginv\fR] [\fB\-mno\-ginv\fR]
   [\fB\-mloongson\-mmi\fR] [\fB\-mno\-loongson\-mmi\fR]
   [\fB\-mloongson\-cam\fR] [\fB\-mno\-loongson\-cam\fR]
   [\fB\-mloongson\-ext\fR] [\fB\-mno\-loongson\-ext\fR]
   [\fB\-mloongson\-ext2\fR] [\fB\-mno\-loongson\-ext2\fR]
   [\fB\-minsn32\fR] [\fB\-mno\-insn32\fR]
   [\fB\-mfix7000\fR] [\fB\-mno\-fix7000\fR]
   [\fB\-mfix\-rm7000\fR] [\fB\-mno\-fix\-rm7000\fR]
   [\fB\-mfix\-vr4120\fR] [\fB\-mno\-fix\-vr4120\fR]
   [\fB\-mfix\-vr4130\fR] [\fB\-mno\-fix\-vr4130\fR]
   [\fB\-mfix\-r5900\fR] [\fB\-mno\-fix\-r5900\fR]
   [\fB\-mdebug\fR] [\fB\-no\-mdebug\fR]
   [\fB\-mpdr\fR] [\fB\-mno\-pdr\fR]
.PP
\&\fITarget MMIX options:\fR
   [\fB\-\-fixed\-special\-register\-names\fR] [\fB\-\-globalize\-symbols\fR]
   [\fB\-\-gnu\-syntax\fR] [\fB\-\-relax\fR] [\fB\-\-no\-predefined\-symbols\fR]
   [\fB\-\-no\-expand\fR] [\fB\-\-no\-merge\-gregs\fR] [\fB\-x\fR]
   [\fB\-\-linker\-allocated\-gregs\fR]
.PP
\&\fITarget NDS32 options:\fR
    [\fB\-EL\fR] [\fB\-EB\fR] [\fB\-O\fR] [\fB\-Os\fR] [\fB\-mcpu=\fR\fIcpu\fR]
    [\fB\-misa=\fR\fIisa\fR] [\fB\-mabi=\fR\fIabi\fR] [\fB\-mall\-ext\fR]
    [\fB\-m[no\-]16\-bit\fR]  [\fB\-m[no\-]perf\-ext\fR] [\fB\-m[no\-]perf2\-ext\fR]
    [\fB\-m[no\-]string\-ext\fR] [\fB\-m[no\-]dsp\-ext\fR] [\fB\-m[no\-]mac\fR] [\fB\-m[no\-]div\fR]
    [\fB\-m[no\-]audio\-isa\-ext\fR] [\fB\-m[no\-]fpu\-sp\-ext\fR] [\fB\-m[no\-]fpu\-dp\-ext\fR]
    [\fB\-m[no\-]fpu\-fma\fR] [\fB\-mfpu\-freg=\fR\fIFREG\fR] [\fB\-mreduced\-regs\fR]
    [\fB\-mfull\-regs\fR] [\fB\-m[no\-]dx\-regs\fR] [\fB\-mpic\fR] [\fB\-mno\-relax\fR]
    [\fB\-mb2bb\fR]
.PP
\&\fITarget PDP11 options:\fR
   [\fB\-mpic\fR|\fB\-mno\-pic\fR] [\fB\-mall\fR] [\fB\-mno\-extensions\fR]
   [\fB\-m\fR\fIextension\fR|\fB\-mno\-\fR\fIextension\fR]
   [\fB\-m\fR\fIcpu\fR] [\fB\-m\fR\fImachine\fR]
.PP
\&\fITarget picoJava options:\fR
   [\fB\-mb\fR|\fB\-me\fR]
.PP
\&\fITarget PowerPC options:\fR
   [\fB\-a32\fR|\fB\-a64\fR]
   [\fB\-mpwrx\fR|\fB\-mpwr2\fR|\fB\-mpwr\fR|\fB\-m601\fR|\fB\-mppc\fR|\fB\-mppc32\fR|\fB\-m603\fR|\fB\-m604\fR|\fB\-m403\fR|\fB\-m405\fR|
    \fB\-m440\fR|\fB\-m464\fR|\fB\-m476\fR|\fB\-m7400\fR|\fB\-m7410\fR|\fB\-m7450\fR|\fB\-m7455\fR|\fB\-m750cl\fR|\fB\-mgekko\fR|
    \fB\-mbroadway\fR|\fB\-mppc64\fR|\fB\-m620\fR|\fB\-me500\fR|\fB\-e500x2\fR|\fB\-me500mc\fR|\fB\-me500mc64\fR|\fB\-me5500\fR|
    \fB\-me6500\fR|\fB\-mppc64bridge\fR|\fB\-mbooke\fR|\fB\-mpower4\fR|\fB\-mpwr4\fR|\fB\-mpower5\fR|\fB\-mpwr5\fR|\fB\-mpwr5x\fR|
    \fB\-mpower6\fR|\fB\-mpwr6\fR|\fB\-mpower7\fR|\fB\-mpwr7\fR|\fB\-mpower8\fR|\fB\-mpwr8\fR|\fB\-mpower9\fR|\fB\-mpwr9\fR\fB\-ma2\fR|
    \fB\-mcell\fR|\fB\-mspe\fR|\fB\-mspe2\fR|\fB\-mtitan\fR|\fB\-me300\fR|\fB\-mcom\fR]
   [\fB\-many\fR] [\fB\-maltivec\fR|\fB\-mvsx\fR|\fB\-mhtm\fR|\fB\-mvle\fR]
   [\fB\-mregnames\fR|\fB\-mno\-regnames\fR]
   [\fB\-mrelocatable\fR|\fB\-mrelocatable\-lib\fR|\fB\-K PIC\fR] [\fB\-memb\fR]
   [\fB\-mlittle\fR|\fB\-mlittle\-endian\fR|\fB\-le\fR|\fB\-mbig\fR|\fB\-mbig\-endian\fR|\fB\-be\fR]
   [\fB\-nops=\fR\fIcount\fR]
.PP
\&\fITarget PRU options:\fR
   [\fB\-link\-relax\fR]
   [\fB\-mnolink\-relax\fR]
   [\fB\-mno\-warn\-regname\-label\fR]
.PP
\&\fITarget RISC\-V options:\fR
   [\fB\-fpic\fR|\fB\-fPIC\fR|\fB\-fno\-pic\fR]
   [\fB\-march\fR=\fIISA\fR|\fIProfiles\fR|\fIProfiles_ISA\fR]
   [\fB\-mabi\fR=\fIABI\fR]
   [\fB\-mlittle\-endian\fR|\fB\-mbig\-endian\fR]
.PP
\&\fITarget RL78 options:\fR
   [\fB\-mg10\fR]
   [\fB\-m32bit\-doubles\fR|\fB\-m64bit\-doubles\fR]
.PP
\&\fITarget RX options:\fR
   [\fB\-mlittle\-endian\fR|\fB\-mbig\-endian\fR]
   [\fB\-m32bit\-doubles\fR|\fB\-m64bit\-doubles\fR]
   [\fB\-muse\-conventional\-section\-names\fR]
   [\fB\-msmall\-data\-limit\fR]
   [\fB\-mpid\fR]
   [\fB\-mrelax\fR]
   [\fB\-mint\-register=\fR\fInumber\fR]
   [\fB\-mgcc\-abi\fR|\fB\-mrx\-abi\fR]
.PP
\&\fITarget s390 options:\fR
   [\fB\-m31\fR|\fB\-m64\fR] [\fB\-mesa\fR|\fB\-mzarch\fR] [\fB\-march\fR=\fICPU\fR]
   [\fB\-mregnames\fR|\fB\-mno\-regnames\fR]
   [\fB\-mwarn\-areg\-zero\fR]
   [\fB\-mwarn\-regtype\-mismatch=strict\fR
    \fB\-mwarn\-regtype\-mismatch=relaxed\fR
    \fB\-mwarn\-regtype\-mismatch=no\fR
    \fB\-mno\-warn\-regtype\-mismatch\fR]
.PP
\&\fITarget SCORE options:\fR
   [\fB\-EB\fR][\fB\-EL\fR][\fB\-FIXDD\fR][\fB\-NWARN\fR]
   [\fB\-SCORE5\fR][\fB\-SCORE5U\fR][\fB\-SCORE7\fR][\fB\-SCORE3\fR]
   [\fB\-march=score7\fR][\fB\-march=score3\fR]
   [\fB\-USE_R1\fR][\fB\-KPIC\fR][\fB\-O0\fR][\fB\-G\fR \fInum\fR][\fB\-V\fR]
.PP
\&\fITarget SPARC options:\fR
   [\fB\-Av6\fR|\fB\-Av7\fR|\fB\-Av8\fR|\fB\-Aleon\fR|\fB\-Asparclet\fR|\fB\-Asparclite\fR
    \fB\-Av8plus\fR|\fB\-Av8plusa\fR|\fB\-Av8plusb\fR|\fB\-Av8plusc\fR|\fB\-Av8plusd\fR
    \fB\-Av8plusv\fR|\fB\-Av8plusm\fR|\fB\-Av9\fR|\fB\-Av9a\fR|\fB\-Av9b\fR|\fB\-Av9c\fR
    \fB\-Av9d\fR|\fB\-Av9e\fR|\fB\-Av9v\fR|\fB\-Av9m\fR|\fB\-Asparc\fR|\fB\-Asparcvis\fR
    \fB\-Asparcvis2\fR|\fB\-Asparcfmaf\fR|\fB\-Asparcima\fR|\fB\-Asparcvis3\fR
    \fB\-Asparcvisr\fR|\fB\-Asparc5\fR]
   [\fB\-xarch=v8plus\fR|\fB\-xarch=v8plusa\fR]|\fB\-xarch=v8plusb\fR|\fB\-xarch=v8plusc\fR
    \fB\-xarch=v8plusd\fR|\fB\-xarch=v8plusv\fR|\fB\-xarch=v8plusm\fR|\fB\-xarch=v9\fR
    \fB\-xarch=v9a\fR|\fB\-xarch=v9b\fR|\fB\-xarch=v9c\fR|\fB\-xarch=v9d\fR|\fB\-xarch=v9e\fR
    \fB\-xarch=v9v\fR|\fB\-xarch=v9m\fR|\fB\-xarch=sparc\fR|\fB\-xarch=sparcvis\fR
    \fB\-xarch=sparcvis2\fR|\fB\-xarch=sparcfmaf\fR|\fB\-xarch=sparcima\fR
    \fB\-xarch=sparcvis3\fR|\fB\-xarch=sparcvisr\fR|\fB\-xarch=sparc5\fR
    \fB\-bump\fR]
   [\fB\-32\fR|\fB\-64\fR]
   [\fB\-\-enforce\-aligned\-data\fR][\fB\-\-dcti\-couples\-detect\fR]
.PP
\&\fITarget TIC54X options:\fR
 [\fB\-mcpu=54[123589]\fR|\fB\-mcpu=54[56]lp\fR] [\fB\-mfar\-mode\fR|\fB\-mf\fR]
 [\fB\-merrors\-to\-file\fR \fI<filename>\fR|\fB\-me\fR \fI<filename>\fR]
.PP
\&\fITarget TIC6X options:\fR
   [\fB\-march=\fR\fIarch\fR] [\fB\-mbig\-endian\fR|\fB\-mlittle\-endian\fR]
   [\fB\-mdsbt\fR|\fB\-mno\-dsbt\fR] [\fB\-mpid=no\fR|\fB\-mpid=near\fR|\fB\-mpid=far\fR]
   [\fB\-mpic\fR|\fB\-mno\-pic\fR]
.PP
\&\fITarget TILE\-Gx options:\fR
   [\fB\-m32\fR|\fB\-m64\fR][\fB\-EB\fR][\fB\-EL\fR]
.PP
\&\fITarget Visium options:\fR
   [\fB\-mtune=\fR\fIarch\fR]
.PP
\&\fITarget Xtensa options:\fR
 [\fB\-\-[no\-]text\-section\-literals\fR] [\fB\-\-[no\-]auto\-litpools\fR]
 [\fB\-\-[no\-]absolute\-literals\fR]
 [\fB\-\-[no\-]target\-align\fR] [\fB\-\-[no\-]longcalls\fR]
 [\fB\-\-[no\-]transform\fR]
 [\fB\-\-rename\-section\fR \fIoldname\fR=\fInewname\fR]
 [\fB\-\-[no\-]trampolines\fR]
 [\fB\-\-abi\-windowed\fR|\fB\-\-abi\-call0\fR]
.PP
\&\fITarget Z80 options:\fR
  [\fB\-march=\fR\fICPU\fR\fI[\-EXT]\fR\fI[+EXT]\fR]
  [\fB\-local\-prefix=\fR\fIPREFIX\fR]
  [\fB\-colonless\fR]
  [\fB\-sdcc\fR]
  [\fB\-fp\-s=\fR\fIFORMAT\fR]
  [\fB\-fp\-d=\fR\fIFORMAT\fR]
.SH DESCRIPTION
.IX Header "DESCRIPTION"
GNU \fBas\fR is really a family of assemblers.
If you use (or have used) the GNU assembler on one architecture, you
should find a fairly similar environment when you use it on another
architecture.  Each version has much in common with the others,
including object file formats, most assembler directives (often called
\&\fIpseudo\-ops\fR) and assembler syntax.
.PP
\&\fBas\fR is primarily intended to assemble the output of the
GNU C compiler \f(CW\*(C`gcc\*(C'\fR for use by the linker
\&\f(CW\*(C`ld\*(C'\fR.  Nevertheless, we\*(Aqve tried to make \fBas\fR
assemble correctly everything that other assemblers for the same
machine would assemble.
Any exceptions are documented explicitly.
This doesn\*(Aqt mean \fBas\fR always uses the same syntax as another
assembler for the same architecture; for example, we know of several
incompatible versions of 680x0 assembly language syntax.
.PP
Each time you run \fBas\fR it assembles exactly one source
program.  The source program is made up of one or more files.
(The standard input is also a file.)
.PP
You give \fBas\fR a command line that has zero or more input file
names.  The input files are read (from left file name to right).  A
command\-line argument (in any position) that has no special meaning
is taken to be an input file name.
.PP
If you give \fBas\fR no file names it attempts to read one input file
from the \fBas\fR standard input, which is normally your terminal.  You
may have to type \fBctl\-D\fR to tell \fBas\fR there is no more program
to assemble.
.PP
Use \fB\-\-\fR if you need to explicitly name the standard input file
in your command line.
.PP
If the source is empty, \fBas\fR produces a small, empty object
file.
.PP
\&\fBas\fR may write warnings and error messages to the standard error
file (usually your terminal).  This should not happen when  a compiler
runs \fBas\fR automatically.  Warnings report an assumption made so
that \fBas\fR could keep assembling a flawed program; errors report a
grave problem that stops the assembly.
.PP
If you are invoking \fBas\fR via the GNU C compiler,
you can use the \fB\-Wa\fR option to pass arguments through to the assembler.
The assembler arguments must be separated from each other (and the \fB\-Wa\fR)
by commas.  For example:
.PP
.Vb 1
\&        gcc \-c \-g \-O \-Wa,\-alh,\-L file.c
.Ve
.PP
This passes two options to the assembler: \fB\-alh\fR (emit a listing to
standard output with high\-level and assembly source) and \fB\-L\fR (retain
local symbols in the symbol table).
.PP
Usually you do not need to use this \fB\-Wa\fR mechanism, since many compiler
command\-line options are automatically passed to the assembler by the compiler.
(You can call the GNU compiler driver with the \fB\-v\fR option to see
precisely what options it passes to each compilation pass, including the
assembler.)
.SH OPTIONS
.IX Header "OPTIONS"
.IP \fB@\fR\fIfile\fR 4
.IX Item "@file"
Read command\-line options from \fIfile\fR.  The options read are
inserted in place of the original @\fIfile\fR option.  If \fIfile\fR
does not exist, or cannot be read, then the option will be treated
literally, and not removed.
.Sp
Options in \fIfile\fR are separated by whitespace.  A whitespace
character may be included in an option by surrounding the entire
option in either single or double quotes.  Any character (including a
backslash) may be included by prefixing the character to be included
with a backslash.  The \fIfile\fR may itself contain additional
@\fIfile\fR options; any such options will be processed recursively.
.IP \fB\-a[cdghilmns]\fR 4
.IX Item "-a[cdghilmns]"
Turn on listings, in any of a variety of ways:
.RS 4
.IP \fB\-ac\fR 4
.IX Item "-ac"
omit false conditionals
.IP \fB\-ad\fR 4
.IX Item "-ad"
omit debugging directives
.IP \fB\-ag\fR 4
.IX Item "-ag"
include general information, like as version and options passed
.IP \fB\-ah\fR 4
.IX Item "-ah"
include high\-level source
.IP \fB\-al\fR 4
.IX Item "-al"
include assembly
.IP \fB\-ali\fR 4
.IX Item "-ali"
include assembly with ginsn
.IP \fB\-am\fR 4
.IX Item "-am"
include macro expansions
.IP \fB\-an\fR 4
.IX Item "-an"
omit forms processing
.IP \fB\-as\fR 4
.IX Item "-as"
include symbols
.IP \fB=file\fR 4
.IX Item "=file"
set the name of the listing file
.RE
.RS 4
.Sp
You may combine these options; for example, use \fB\-aln\fR for assembly
listing without forms processing.  The \fB=file\fR option, if used, must be
the last one.  By itself, \fB\-a\fR defaults to \fB\-ahls\fR.
.RE
.IP \fB\-\-alternate\fR 4
.IX Item "--alternate"
Begin in alternate macro mode.
.IP \fB\-\-compress\-debug\-sections\fR 4
.IX Item "--compress-debug-sections"
Compress DWARF debug sections using zlib with SHF_COMPRESSED from the
ELF ABI.  The resulting object file may not be compatible with older
linkers and object file utilities.  Note if compression would make a
given section \fIlarger\fR then it is not compressed.
.IP \fB\-\-compress\-debug\-sections=none\fR 4
.IX Item "--compress-debug-sections=none"
.PD 0
.IP \fB\-\-compress\-debug\-sections=zlib\fR 4
.IX Item "--compress-debug-sections=zlib"
.IP \fB\-\-compress\-debug\-sections=zlib\-gnu\fR 4
.IX Item "--compress-debug-sections=zlib-gnu"
.IP \fB\-\-compress\-debug\-sections=zlib\-gabi\fR 4
.IX Item "--compress-debug-sections=zlib-gabi"
.IP \fB\-\-compress\-debug\-sections=zstd\fR 4
.IX Item "--compress-debug-sections=zstd"
.PD
These options control how DWARF debug sections are compressed.
\&\fB\-\-compress\-debug\-sections=none\fR is equivalent to
\&\fB\-\-nocompress\-debug\-sections\fR.
\&\fB\-\-compress\-debug\-sections=zlib\fR and
\&\fB\-\-compress\-debug\-sections=zlib\-gabi\fR are equivalent to
\&\fB\-\-compress\-debug\-sections\fR.
\&\fB\-\-compress\-debug\-sections=zlib\-gnu\fR compresses DWARF debug sections
using the obsoleted zlib\-gnu format.  The debug sections are renamed to begin
with \fB.zdebug\fR.
\&\fB\-\-compress\-debug\-sections=zstd\fR compresses DWARF debug
sections using zstd.  Note \- if compression would actually make a section
\&\fIlarger\fR, then it is not compressed nor renamed.
.IP \fB\-\-nocompress\-debug\-sections\fR 4
.IX Item "--nocompress-debug-sections"
Do not compress DWARF debug sections.  This is usually the default for all
targets except the x86/x86_64, but a configure time option can be used to
override this.
.IP \fB\-D\fR 4
.IX Item "-D"
Enable debugging in target specific backends, if supported.  Otherwise ignored.
Even if ignored, this option is accepted for script compatibility with calls to
other assemblers.
.IP "\fB\-\-debug\-prefix\-map\fR \fIold\fR\fB=\fR\fInew\fR" 4
.IX Item "--debug-prefix-map old=new"
When assembling files in directory \fIold\fR, record debugging
information describing them as in \fInew\fR instead.
.IP "\fB\-\-defsym\fR \fIsym\fR\fB=\fR\fIvalue\fR" 4
.IX Item "--defsym sym=value"
Define the symbol \fIsym\fR to be \fIvalue\fR before assembling the input file.
\&\fIvalue\fR must be an integer constant.  As in C, a leading \fB0x\fR
indicates a hexadecimal value, and a leading \fB0\fR indicates an octal
value.  The value of the symbol can be overridden inside a source file via the
use of a \f(CW\*(C`.set\*(C'\fR pseudo\-op.
.IP \fB\-\-dump\-config\fR 4
.IX Item "--dump-config"
Displays how the assembler is configured and then exits.
.IP \fB\-\-elf\-stt\-common=no\fR 4
.IX Item "--elf-stt-common=no"
.PD 0
.IP \fB\-\-elf\-stt\-common=yes\fR 4
.IX Item "--elf-stt-common=yes"
.PD
These options control whether the ELF assembler should generate common
symbols with the \f(CW\*(C`STT_COMMON\*(C'\fR type.  The default can be controlled
by a configure option \fB\-\-enable\-elf\-stt\-common\fR.
.IP \fB\-\-emit\-local\-absolute\fR 4
.IX Item "--emit-local-absolute"
Emit even pre\-defined (local) absolute symbols to the outgoing symbol table.
Note that this isn\*(Aqt the exact opposite of \fB\-\-strip\-local\-absolute\fR.
.IP \fB\-\-emulation=\fR\fIname\fR 4
.IX Item "--emulation=name"
If the assembler is configured to support multiple different target
configurations then this option can be used to select the desired form.
.IP \fB\-f\fR 4
.IX Item "-f"
"fast"\-\-\-skip whitespace and comment preprocessing (assume source is
compiler output).
.IP \fB\-g\fR 4
.IX Item "-g"
.PD 0
.IP \fB\-\-gen\-debug\fR 4
.IX Item "--gen-debug"
.PD
Generate debugging information for each assembler source line using whichever
debug format is preferred by the target.  This currently means either STABS,
ECOFF or DWARF2.  When the debug format is DWARF then a \f(CW\*(C`.debug_info\*(C'\fR and
\&\f(CW\*(C`.debug_line\*(C'\fR section is only emitted when the assembly file doesn\*(Aqt
generate one itself.
.IP \fB\-\-gstabs\fR 4
.IX Item "--gstabs"
Generate stabs debugging information for each assembler line.  This
may help debugging assembler code, if the debugger can handle it.
.IP \fB\-\-gstabs+\fR 4
.IX Item "--gstabs+"
Generate stabs debugging information for each assembler line, with GNU
extensions that probably only gdb can handle, and that could make other
debuggers crash or refuse to read your program.  This
may help debugging assembler code.  Currently the only GNU extension is
the location of the current working directory at assembling time.
.IP \fB\-\-gdwarf\-2\fR 4
.IX Item "--gdwarf-2"
Generate DWARF2 debugging information for each assembler line.  This
may help debugging assembler code, if the debugger can handle it.  Note\-\-\-this
option is only supported by some targets, not all of them.
.IP \fB\-\-gdwarf\-3\fR 4
.IX Item "--gdwarf-3"
This option is the same as the \fB\-\-gdwarf\-2\fR option, except that it
allows for the possibility of the generation of extra debug information as per
version 3 of the DWARF specification.  Note \- enabling this option does not
guarantee the generation of any extra information, the choice to do so is on a
per target basis.
.IP \fB\-\-gdwarf\-4\fR 4
.IX Item "--gdwarf-4"
This option is the same as the \fB\-\-gdwarf\-2\fR option, except that it
allows for the possibility of the generation of extra debug information as per
version 4 of the DWARF specification.  Note \- enabling this option does not
guarantee the generation of any extra information, the choice to do so is on a
per target basis.
.IP \fB\-\-gdwarf\-5\fR 4
.IX Item "--gdwarf-5"
This option is the same as the \fB\-\-gdwarf\-2\fR option, except that it
allows for the possibility of the generation of extra debug information as per
version 5 of the DWARF specification.  Note \- enabling this option does not
guarantee the generation of any extra information, the choice to do so is on a
per target basis.
.IP \fB\-\-gdwarf\-sections\fR 4
.IX Item "--gdwarf-sections"
Instead of creating a .debug_line section, create a series of
\&.debug_line.\fIfoo\fR sections where \fIfoo\fR is the name of the
corresponding code section.  For example a code section called \fI.text.func\fR
will have its dwarf line number information placed into a section called
\&\fI.debug_line.text.func\fR.  If the code section is just called \fI.text\fR
then debug line section will still be called just \fI.debug_line\fR without any
suffix.
.IP \fB\-\-gdwarf\-cie\-version=\fR\fIversion\fR 4
.IX Item "--gdwarf-cie-version=version"
Control which version of DWARF Common Information Entries (CIEs) are produced.
When this flag is not specified the default is version 1, though some targets
can modify this default.  Other possible values for \fIversion\fR are 3 or 4.
.IP \fB\-\-generate\-missing\-build\-notes=yes\fR 4
.IX Item "--generate-missing-build-notes=yes"
.PD 0
.IP \fB\-\-generate\-missing\-build\-notes=no\fR 4
.IX Item "--generate-missing-build-notes=no"
.PD
These options control whether the ELF assembler should generate GNU Build
attribute notes if none are present in the input sources.
The default can be controlled by the \fB\-\-enable\-generate\-build\-notes\fR
configure option.
.IP \fB\-\-gsframe\fR 4
.IX Item "--gsframe"
.PD 0
.IP \fB\-\-gsframe\fR 4
.IX Item "--gsframe"
.IP \fB\-\-gsframe=no\fR 4
.IX Item "--gsframe=no"
.IP \fB\-\-gsframe=yes\fR 4
.IX Item "--gsframe=yes"
.PD
Create \fI.sframe\fR section from CFI directives.  The explicit
\&\fB\-\-gsframe=yes\fR option behaves the same as \fB\-\-gsframe\fR.
Generation can be suppressed with \fB\-\-gsframe=no\fR.  The default can be
controlled by a configure option \fB\-\-enable\-default\-sframe\fR.  The current
version of the emitted SFrame stack trace data is SFRAME_VERSION_3.
.IP \fB\-\-gsframe\-3\fR 4
.IX Item "--gsframe-3"
Generate SFrame stack trace information as per Version 3 of the specification.
.IP "\fB\-\-hash\-size\fR \fIN\fR" 4
.IX Item "--hash-size N"
Ignored.  Supported for command line compatibility with other assemblers.
.IP \fB\-\-help\fR 4
.IX Item "--help"
Print a summary of the command\-line options and exit.
.IP \fB\-\-target\-help\fR 4
.IX Item "--target-help"
Print a summary of all target specific options and exit.
.IP \fB\-\-info\fR 4
.IX Item "--info"
Don\*(Aqt suppress informational messages.
.IP \fB\-\-no\-info\fR 4
.IX Item "--no-info"
Suppress informational messages.
.IP "\fB\-I\fR \fIdir\fR" 4
.IX Item "-I dir"
Add directory \fIdir\fR to the search list for \f(CW\*(C`.include\*(C'\fR directives.
.IP \fB\-J\fR 4
.IX Item "-J"
Don\*(Aqt warn about signed overflow.
.IP \fB\-K\fR 4
.IX Item "-K"
Issue warnings when difference tables altered for long displacements.
.IP \fB\-L\fR 4
.IX Item "-L"
.PD 0
.IP \fB\-\-keep\-locals\fR 4
.IX Item "--keep-locals"
.PD
Keep (in the symbol table) local symbols.  These symbols start with
system\-specific local label prefixes, typically \fB.L\fR for ELF systems
or \fBL\fR for traditional a.out systems.
.IP \fB\-\-listing\-lhs\-width=\fR\fInumber\fR 4
.IX Item "--listing-lhs-width=number"
Set the maximum width, in words, of the output data column for an assembler
listing to \fInumber\fR.
.IP \fB\-\-listing\-lhs\-width2=\fR\fInumber\fR 4
.IX Item "--listing-lhs-width2=number"
Set the maximum width, in words, of the output data column for continuation
lines in an assembler listing to \fInumber\fR.
.IP \fB\-\-listing\-rhs\-width=\fR\fInumber\fR 4
.IX Item "--listing-rhs-width=number"
Set the maximum width of an input source line, as displayed in a listing, to
\&\fInumber\fR bytes.
.IP \fB\-\-listing\-cont\-lines=\fR\fInumber\fR 4
.IX Item "--listing-cont-lines=number"
Set the maximum number of lines printed in a listing for a single line of input
to \fInumber\fR + 1.
.IP \fB\-\-multibyte\-handling=allow\fR 4
.IX Item "--multibyte-handling=allow"
.PD 0
.IP \fB\-\-multibyte\-handling=warn\fR 4
.IX Item "--multibyte-handling=warn"
.IP \fB\-\-multibyte\-handling=warn\-sym\-only\fR 4
.IX Item "--multibyte-handling=warn-sym-only"
.IP \fB\-\-multibyte\-handling=warn_sym_only\fR 4
.IX Item "--multibyte-handling=warn_sym_only"
.PD
Controls how the assembler handles multibyte characters in the input.  The
default (which can be restored by using the \fBallow\fR argument) is to
allow such characters without complaint.  Using the \fBwarn\fR argument will
make the assembler generate a warning message whenever any multibyte character
is encountered.  Using the \fBwarn\-sym\-only\fR argument will only cause a
warning to be generated when a symbol is defined with a name that contains
multibyte characters.  (References to undefined symbols will not generate a
warning).
.IP \fB\-\-no\-pad\-sections\fR 4
.IX Item "--no-pad-sections"
Stop the assembler for padding the ends of output sections to the alignment
of that section.  The default is to pad the sections, but this can waste space
which might be needed on targets which have tight memory constraints.
.IP "\fB\-o\fR \fIobjfile\fR" 4
.IX Item "-o objfile"
Name the object\-file output from \fBas\fR \fIobjfile\fR.
.IP \fB\-R\fR 4
.IX Item "-R"
Fold the data section into the text section.
.IP \fB\-\-reduce\-memory\-overheads\fR 4
.IX Item "--reduce-memory-overheads"
Ignored.  Supported for compatibility with tools that pass the same option to
both the assembler and the linker.
.IP \fB\-\-scfi=experimental\fR 4
.IX Item "--scfi=experimental"
This option controls whether the assembler should synthesize CFI for
hand\-written input.  If the input already contains some synthesizable CFI
directives, the assembler ignores them and emits a warning.  Note that
\&\f(CW\*(C`\-\-scfi=experimental\*(C'\fR is not intended to be used for compiler\-generated
code, including inline assembly.  This experimental support is work in
progress.  Only System V AMD64 ABI is supported.
.Sp
Each input function in assembly must begin with the \f(CW\*(C`.type\*(C'\fR directive, and
should ideally be closed off using a \f(CW\*(C`.size\*(C'\fR directive.  When using SCFI,
each \f(CW\*(C`.type\*(C'\fR directive prompts GAS to start a new FDE (a.k.a., Function
Descriptor Entry).  This implies that with each \f(CW\*(C`.type\*(C'\fR directive, a
previous block of instructions, if any, is finalised as a distinct FDE.
.IP \fB\-\-sectname\-subst\fR 4
.IX Item "--sectname-subst"
Honor substitution sequences in section names.
.IP \fB\-\-size\-check=error\fR 4
.IX Item "--size-check=error"
.PD 0
.IP \fB\-\-size\-check=warning\fR 4
.IX Item "--size-check=warning"
.PD
Issue an error or warning for invalid ELF .size directive.
.IP \fB\-\-statistics\fR 4
.IX Item "--statistics"
Print the maximum space (in bytes) and total time (in seconds) used by
assembly.
.IP \fB\-\-strip\-local\-absolute\fR 4
.IX Item "--strip-local-absolute"
Remove local absolute symbols from the outgoing symbol table.
.IP \fB\-v\fR 4
.IX Item "-v"
.PD 0
.IP \fB\-\-verbose\fR 4
.IX Item "--verbose"
.PD
Print the \fBas\fR version.
.IP \fB\-\-version\fR 4
.IX Item "--version"
.PD 0
.IP \fB\-version\fR 4
.IX Item "-version"
.PD
Print the \fBas\fR version and exit.
.IP \fB\-W\fR 4
.IX Item "-W"
.PD 0
.IP \fB\-\-no\-warn\fR 4
.IX Item "--no-warn"
.PD
Suppress warning messages.
.IP \fB\-\-warn\fR 4
.IX Item "--warn"
Don\*(Aqt suppress warning messages or treat them as errors.
.IP \fB\-\-fatal\-warnings\fR 4
.IX Item "--fatal-warnings"
Treat warnings as errors.
.IP \fB\-w\fR 4
.IX Item "-w"
Ignored.
.IP \fB\-x\fR 4
.IX Item "-x"
Ignored.
.IP \fB\-Z\fR 4
.IX Item "-Z"
Generate an object file even after errors.
.IP "\fB\-\- |\fR \fIfiles\fR \fB...\fR" 4
.IX Item "-- | files ..."
Standard input, or source files to assemble.
.PP
The following options are available when as is configured for the
64\-bit mode of the ARM Architecture (AArch64).
.IP \fB\-EB\fR 4
.IX Item "-EB"
This option specifies that the output generated by the assembler should
be marked as being encoded for a big\-endian processor.
.IP \fB\-EL\fR 4
.IX Item "-EL"
This option specifies that the output generated by the assembler should
be marked as being encoded for a little\-endian processor.
.IP \fB\-mabi=\fR\fIabi\fR 4
.IX Item "-mabi=abi"
Specify which ABI the source code uses.  The recognized arguments
are: \f(CW\*(C`ilp32\*(C'\fR and \f(CW\*(C`lp64\*(C'\fR, which decides the generated object
file in ELF32 and ELF64 format respectively.  The default is \f(CW\*(C`lp64\*(C'\fR.
.IP \fB\-mcpu=\fR\fIprocessor\fR\fB[+\fR\fIextension\fR\fB...]\fR 4
.IX Item "-mcpu=processor[+extension...]"
This option specifies the target processor.  The assembler will issue an error
message if an attempt is made to assemble an instruction which will not execute
on the target processor.  The following processor names are recognized:
\&\f(CW\*(C`cortex\-a34\*(C'\fR,
\&\f(CW\*(C`cortex\-a35\*(C'\fR,
\&\f(CW\*(C`cortex\-a53\*(C'\fR,
\&\f(CW\*(C`cortex\-a55\*(C'\fR,
\&\f(CW\*(C`cortex\-a57\*(C'\fR,
\&\f(CW\*(C`cortex\-a65\*(C'\fR,
\&\f(CW\*(C`cortex\-a65ae\*(C'\fR,
\&\f(CW\*(C`cortex\-a72\*(C'\fR,
\&\f(CW\*(C`cortex\-a73\*(C'\fR,
\&\f(CW\*(C`cortex\-a75\*(C'\fR,
\&\f(CW\*(C`cortex\-a76\*(C'\fR,
\&\f(CW\*(C`cortex\-a76ae\*(C'\fR,
\&\f(CW\*(C`cortex\-a77\*(C'\fR,
\&\f(CW\*(C`cortex\-a78\*(C'\fR,
\&\f(CW\*(C`cortex\-a78ae\*(C'\fR,
\&\f(CW\*(C`cortex\-a78c\*(C'\fR,
\&\f(CW\*(C`cortex\-a510\*(C'\fR,
\&\f(CW\*(C`cortex\-a520\*(C'\fR,
\&\f(CW\*(C`cortex\-a710\*(C'\fR,
\&\f(CW\*(C`cortex\-a720\*(C'\fR,
\&\f(CW\*(C`ares\*(C'\fR,
\&\f(CW\*(C`exynos\-m1\*(C'\fR,
\&\f(CW\*(C`falkor\*(C'\fR,
\&\f(CW\*(C`neoverse\-n1\*(C'\fR,
\&\f(CW\*(C`neoverse\-n2\*(C'\fR,
\&\f(CW\*(C`neoverse\-e1\*(C'\fR,
\&\f(CW\*(C`neoverse\-v1\*(C'\fR,
\&\f(CW\*(C`qdf24xx\*(C'\fR,
\&\f(CW\*(C`saphira\*(C'\fR,
\&\f(CW\*(C`thunderx\*(C'\fR,
\&\f(CW\*(C`vulcan\*(C'\fR,
\&\f(CW\*(C`xgene1\*(C'\fR
\&\f(CW\*(C`xgene2\*(C'\fR,
\&\f(CW\*(C`cortex\-r82\*(C'\fR,
\&\f(CW\*(C`cortex\-x1\*(C'\fR,
\&\f(CW\*(C`cortex\-x2\*(C'\fR,
\&\f(CW\*(C`cortex\-x3\*(C'\fR,
and
\&\f(CW\*(C`cortex\-x4\*(C'\fR.
The special name \f(CW\*(C`all\*(C'\fR may be used to allow the assembler to accept
instructions valid for any supported processor, including all optional
extensions.
.Sp
In addition to the basic instruction set, the assembler can be told to
accept, or restrict, various extension mnemonics that extend the
processor.
.Sp
If some implementations of a particular processor can have an
extension, then then those extensions are automatically enabled.
Consequently, you will not normally have to specify any additional
extensions.
.IP \fB\-march=\fR\fIarchitecture\fR\fB[+\fR\fIextension\fR\fB...]\fR 4
.IX Item "-march=architecture[+extension...]"
This option specifies the target architecture.  The assembler will
issue an error message if an attempt is made to assemble an
instruction which will not execute on the target architecture.  The
following architecture names are recognized: \f(CW\*(C`armv8\-a\*(C'\fR,
\&\f(CW\*(C`armv8.1\-a\*(C'\fR, \f(CW\*(C`armv8.2\-a\*(C'\fR, \f(CW\*(C`armv8.3\-a\*(C'\fR, \f(CW\*(C`armv8.4\-a\*(C'\fR
\&\f(CW\*(C`armv8.5\-a\*(C'\fR, \f(CW\*(C`armv8.6\-a\*(C'\fR, \f(CW\*(C`armv8.7\-a\*(C'\fR, \f(CW\*(C`armv8.8\-a\*(C'\fR,
\&\f(CW\*(C`armv8.9\-a\*(C'\fR, \f(CW\*(C`armv8\-r\*(C'\fR, \f(CW\*(C`armv9\-a\*(C'\fR, \f(CW\*(C`armv9.1\-a\*(C'\fR,
\&\f(CW\*(C`armv9.2\-a\*(C'\fR, \f(CW\*(C`armv9.3\-a\*(C'\fR, \f(CW\*(C`armv9.4\-a\*(C'\fR and \f(CW\*(C`armv9.5\-a\*(C'\fR.
.Sp
If both \fB\-mcpu\fR and \fB\-march\fR are specified, the
assembler will use the setting for \fB\-mcpu\fR.  If neither are
specified, the assembler will default to \fB\-mcpu=all\fR.
.Sp
The architecture option can be extended with the same instruction set
extension options as the \fB\-mcpu\fR option.  Unlike
\&\fB\-mcpu\fR, extensions are not always enabled by default.
.IP \fB\-mbig\-obj\fR 4
.IX Item "-mbig-obj"
On PE/COFF target this option forces the use of big object file
format, which allows more than 32768 sections.
.IP \fB\-mverbose\-error\fR 4
.IX Item "-mverbose-error"
This option enables verbose error messages for AArch64 gas.  This option
is enabled by default.
.IP \fB\-mno\-verbose\-error\fR 4
.IX Item "-mno-verbose-error"
This option disables verbose error messages in AArch64 gas.
.IP \fB\-menable\-sysreg\-checking\fR 4
.IX Item "-menable-sysreg-checking"
This option enables error messages that are issued if an attempt is made to
assemble a system register access which will not execute on the target
architecture.
.PP
The following options are available when as is configured for an Alpha
processor.
.IP \fB\-m\fR\fIcpu\fR 4
.IX Item "-mcpu"
This option specifies the target processor.  If an attempt is made to
assemble an instruction which will not execute on the target processor,
the assembler may either expand the instruction as a macro or issue an
error message.  This option is equivalent to the \f(CW\*(C`.arch\*(C'\fR directive.
.Sp
The following processor names are recognized:
\&\f(CW21064\fR,
\&\f(CW\*(C`21064a\*(C'\fR,
\&\f(CW21066\fR,
\&\f(CW21068\fR,
\&\f(CW21164\fR,
\&\f(CW\*(C`21164a\*(C'\fR,
\&\f(CW\*(C`21164pc\*(C'\fR,
\&\f(CW21264\fR,
\&\f(CW\*(C`21264a\*(C'\fR,
\&\f(CW\*(C`21264b\*(C'\fR,
\&\f(CW\*(C`ev4\*(C'\fR,
\&\f(CW\*(C`ev5\*(C'\fR,
\&\f(CW\*(C`lca45\*(C'\fR,
\&\f(CW\*(C`ev5\*(C'\fR,
\&\f(CW\*(C`ev56\*(C'\fR,
\&\f(CW\*(C`pca56\*(C'\fR,
\&\f(CW\*(C`ev6\*(C'\fR,
\&\f(CW\*(C`ev67\*(C'\fR,
\&\f(CW\*(C`ev68\*(C'\fR.
The special name \f(CW\*(C`all\*(C'\fR may be used to allow the assembler to accept
instructions valid for any Alpha processor.
.Sp
In order to support existing practice in OSF/1 with respect to \f(CW\*(C`.arch\*(C'\fR,
and existing practice within \fBMILO\fR (the Linux ARC bootloader), the
numbered processor names (e.g. 21064) enable the processor\-specific PALcode
instructions, while the "electro\-vlasic" names (e.g. \f(CW\*(C`ev4\*(C'\fR) do not.
.IP \fB\-mdebug\fR 4
.IX Item "-mdebug"
.PD 0
.IP \fB\-no\-mdebug\fR 4
.IX Item "-no-mdebug"
.PD
Enables or disables the generation of \f(CW\*(C`.mdebug\*(C'\fR encapsulation for
stabs directives and procedure descriptors.  The default is to automatically
enable \f(CW\*(C`.mdebug\*(C'\fR when the first stabs directive is seen.
.IP \fB\-relax\fR 4
.IX Item "-relax"
This option forces all relocations to be put into the object file, instead
of saving space and resolving some relocations at assembly time.  Note that
this option does not propagate all symbol arithmetic into the object file,
because not all symbol arithmetic can be represented.  However, the option
can still be useful in specific applications.
.IP \fB\-replace\fR 4
.IX Item "-replace"
.PD 0
.IP \fB\-noreplace\fR 4
.IX Item "-noreplace"
.PD
Enables or disables the optimization of procedure calls, both at assemblage
and at link time.  These options are only available for VMS targets and
\&\f(CW\*(C`\-replace\*(C'\fR is the default.  See section 1.4.1 of the OpenVMS Linker
Utility Manual.
.IP \fB\-g\fR 4
.IX Item "-g"
This option is used when the compiler generates debug information.  When
\&\fBgcc\fR is using \fBmips\-tfile\fR to generate debug
information for ECOFF, local labels must be passed through to the object
file.  Otherwise this option has no effect.
.IP \fB\-G\fR\fIsize\fR 4
.IX Item "-Gsize"
A local common symbol larger than \fIsize\fR is placed in \f(CW\*(C`.bss\*(C'\fR,
while smaller symbols are placed in \f(CW\*(C`.sbss\*(C'\fR.
.IP \fB\-F\fR 4
.IX Item "-F"
.PD 0
.IP \fB\-32addr\fR 4
.IX Item "-32addr"
.PD
These options are ignored for backward compatibility.
.PP
The following options are available when as is configured for an ARC
processor.
.IP \fB\-mcpu=\fR\fIcpu\fR 4
.IX Item "-mcpu=cpu"
This option selects the core processor variant.
.IP "\fB\-EB | \-EL\fR" 4
.IX Item "-EB | -EL"
Select either big\-endian (\-EB) or little\-endian (\-EL) output.
.IP \fB\-mcode\-density\fR 4
.IX Item "-mcode-density"
Enable Code Density extension instructions.
.PP
The following options are available when as is configured for the ARM
processor family.
.IP \fB\-mcpu=\fR\fIprocessor\fR\fB[+\fR\fIextension\fR\fB...]\fR 4
.IX Item "-mcpu=processor[+extension...]"
Specify which ARM processor variant is the target.
.IP \fB\-march=\fR\fIarchitecture\fR\fB[+\fR\fIextension\fR\fB...]\fR 4
.IX Item "-march=architecture[+extension...]"
Specify which ARM architecture variant is used by the target.
.IP \fB\-mfpu=\fR\fIfloating\-point\-format\fR 4
.IX Item "-mfpu=floating-point-format"
Select which Floating Point architecture is the target.
.IP \fB\-mfloat\-abi=\fR\fIabi\fR 4
.IX Item "-mfloat-abi=abi"
Select which floating point ABI is in use.
.IP \fB\-mthumb\fR 4
.IX Item "-mthumb"
Enable Thumb only instruction decoding.
.IP "\fB\-mapcs\-32 | \-mapcs\-26 | \-mapcs\-float | \-mapcs\-reentrant\fR" 4
.IX Item "-mapcs-32 | -mapcs-26 | -mapcs-float | -mapcs-reentrant"
Select which procedure calling convention is in use.
.IP "\fB\-EB | \-EL\fR" 4
.IX Item "-EB | -EL"
Select either big\-endian (\-EB) or little\-endian (\-EL) output.
.IP \fB\-mthumb\-interwork\fR 4
.IX Item "-mthumb-interwork"
Specify that the code has been generated with interworking between Thumb and
ARM code in mind.
.IP \fB\-mccs\fR 4
.IX Item "-mccs"
Turns on CodeComposer Studio assembly syntax compatibility mode.
.IP \fB\-k\fR 4
.IX Item "-k"
Specify that PIC code has been generated.
.PP
The following options are available when as is configured for
the Blackfin processor family.
.IP \fB\-mcpu=\fR\fIprocessor\fR[\fB\-\fR\fIsirevision\fR] 4
.IX Item "-mcpu=processor[-sirevision]"
This option specifies the target processor.  The optional \fIsirevision\fR
is not used in assembler.  It\*(Aqs here such that GCC can easily pass down its
\&\f(CW\*(C`\-mcpu=\*(C'\fR option.  The assembler will issue an
error message if an attempt is made to assemble an instruction which
will not execute on the target processor.  The following processor names are
recognized:
\&\f(CW\*(C`bf504\*(C'\fR,
\&\f(CW\*(C`bf506\*(C'\fR,
\&\f(CW\*(C`bf512\*(C'\fR,
\&\f(CW\*(C`bf514\*(C'\fR,
\&\f(CW\*(C`bf516\*(C'\fR,
\&\f(CW\*(C`bf518\*(C'\fR,
\&\f(CW\*(C`bf522\*(C'\fR,
\&\f(CW\*(C`bf523\*(C'\fR,
\&\f(CW\*(C`bf524\*(C'\fR,
\&\f(CW\*(C`bf525\*(C'\fR,
\&\f(CW\*(C`bf526\*(C'\fR,
\&\f(CW\*(C`bf527\*(C'\fR,
\&\f(CW\*(C`bf531\*(C'\fR,
\&\f(CW\*(C`bf532\*(C'\fR,
\&\f(CW\*(C`bf533\*(C'\fR,
\&\f(CW\*(C`bf534\*(C'\fR,
\&\f(CW\*(C`bf535\*(C'\fR (not implemented yet),
\&\f(CW\*(C`bf536\*(C'\fR,
\&\f(CW\*(C`bf537\*(C'\fR,
\&\f(CW\*(C`bf538\*(C'\fR,
\&\f(CW\*(C`bf539\*(C'\fR,
\&\f(CW\*(C`bf542\*(C'\fR,
\&\f(CW\*(C`bf542m\*(C'\fR,
\&\f(CW\*(C`bf544\*(C'\fR,
\&\f(CW\*(C`bf544m\*(C'\fR,
\&\f(CW\*(C`bf547\*(C'\fR,
\&\f(CW\*(C`bf547m\*(C'\fR,
\&\f(CW\*(C`bf548\*(C'\fR,
\&\f(CW\*(C`bf548m\*(C'\fR,
\&\f(CW\*(C`bf549\*(C'\fR,
\&\f(CW\*(C`bf549m\*(C'\fR,
\&\f(CW\*(C`bf561\*(C'\fR,
and
\&\f(CW\*(C`bf592\*(C'\fR.
.IP \fB\-mfdpic\fR 4
.IX Item "-mfdpic"
Assemble for the FDPIC ABI.
.IP \fB\-mno\-fdpic\fR 4
.IX Item "-mno-fdpic"
.PD 0
.IP \fB\-mnopic\fR 4
.IX Item "-mnopic"
.PD
Disable \-mfdpic.
.PP
The following options are available when as is configured for
the Linux kernel BPF processor family.
.PP
\&\f(CW@chapter\fR BPF Dependent Features
.SS "BPF Options"
.IX Subsection "BPF Options"
.IP \fB\-EB\fR 4
.IX Item "-EB"
This option specifies that the assembler should emit big\-endian eBPF.
.IP \fB\-EL\fR 4
.IX Item "-EL"
This option specifies that the assembler should emit little\-endian
eBPF.
.IP \fB\-mdialect=\fR\fIdialect\fR 4
.IX Item "-mdialect=dialect"
This option specifies the assembly language dialect to recognize while
assembling.  The assembler supports \fBnormal\fR and
\&\fBpseudoc\fR.
.IP \fB\-misa\-spec=\fR\fIspec\fR 4
.IX Item "-misa-spec=spec"
This option specifies the version of the BPF instruction set to use
when assembling.  The BPF ISA versions supported are \fBv1\fR \fBv2\fR, \fBv3\fR and \fBv4\fR.
.Sp
The value \fBxbpf\fR can be specified to recognize extra
instructions that are used by GCC for testing purposes.  But beware
this is not valid BPF.
.IP \fB\-mno\-relax\fR 4
.IX Item "-mno-relax"
This option tells the assembler to not relax instructions.
.PP
Note that if no endianness option is specified in the command line,
the host endianness is used.
See the info pages for documentation of the CRIS\-specific options.
.PP
The following options are available when as is configured for
the C\-SKY processor family.
.IP \fB\-march=\fR\fIarchname\fR 4
.IX Item "-march=archname"
Assemble for architecture \fIarchname\fR.  The \fB\-\-help\fR option
lists valid values for \fIarchname\fR.
.IP \fB\-mcpu=\fR\fIcpuname\fR 4
.IX Item "-mcpu=cpuname"
Assemble for architecture \fIcpuname\fR.  The \fB\-\-help\fR option
lists valid values for \fIcpuname\fR.
.IP \fB\-EL\fR 4
.IX Item "-EL"
.PD 0
.IP \fB\-mlittle\-endian\fR 4
.IX Item "-mlittle-endian"
.PD
Generate little\-endian output.
.IP \fB\-EB\fR 4
.IX Item "-EB"
.PD 0
.IP \fB\-mbig\-endian\fR 4
.IX Item "-mbig-endian"
.PD
Generate big\-endian output.
.IP \fB\-fpic\fR 4
.IX Item "-fpic"
.PD 0
.IP \fB\-pic\fR 4
.IX Item "-pic"
.PD
Generate position\-independent code.
.IP \fB\-mljump\fR 4
.IX Item "-mljump"
.PD 0
.IP \fB\-mno\-ljump\fR 4
.IX Item "-mno-ljump"
.PD
Enable/disable transformation of the short branch instructions
\&\f(CW\*(C`jbf\*(C'\fR, \f(CW\*(C`jbt\*(C'\fR, and \f(CW\*(C`jbr\*(C'\fR to \f(CW\*(C`jmpi\*(C'\fR.
This option is for V2 processors only.
It is ignored on CK801 and CK802 targets, which do not support the \f(CW\*(C`jmpi\*(C'\fR
instruction, and is enabled by default for other processors.
.IP \fB\-mbranch\-stub\fR 4
.IX Item "-mbranch-stub"
.PD 0
.IP \fB\-mno\-branch\-stub\fR 4
.IX Item "-mno-branch-stub"
.PD
Pass through \f(CW\*(C`R_CKCORE_PCREL_IMM26BY2\*(C'\fR relocations for \f(CW\*(C`bsr\*(C'\fR
instructions to the linker.
.Sp
This option is only available for bare\-metal C\-SKY V2 ELF targets,
where it is enabled by default.  It cannot be used in code that will be
dynamically linked against shared libraries.
.IP \fB\-force2bsr\fR 4
.IX Item "-force2bsr"
.PD 0
.IP \fB\-mforce2bsr\fR 4
.IX Item "-mforce2bsr"
.IP \fB\-no\-force2bsr\fR 4
.IX Item "-no-force2bsr"
.IP \fB\-mno\-force2bsr\fR 4
.IX Item "-mno-force2bsr"
.PD
Enable/disable transformation of \f(CW\*(C`jbsr\*(C'\fR instructions to \f(CW\*(C`bsr\*(C'\fR.
This option is always enabled (and \fB\-mno\-force2bsr\fR is ignored)
for CK801/CK802 targets.  It is also always enabled when
\&\fB\-mbranch\-stub\fR is in effect.
.IP \fB\-jsri2bsr\fR 4
.IX Item "-jsri2bsr"
.PD 0
.IP \fB\-mjsri2bsr\fR 4
.IX Item "-mjsri2bsr"
.IP \fB\-no\-jsri2bsr\fR 4
.IX Item "-no-jsri2bsr"
.IP \fB\-mno\-jsri2bsr\fR 4
.IX Item "-mno-jsri2bsr"
.PD
Enable/disable transformation of \f(CW\*(C`jsri\*(C'\fR instructions to \f(CW\*(C`bsr\*(C'\fR.
This option is enabled by default.
.IP \fB\-mnolrw\fR 4
.IX Item "-mnolrw"
.PD 0
.IP \fB\-mno\-lrw\fR 4
.IX Item "-mno-lrw"
.PD
Enable/disable transformation of \f(CW\*(C`lrw\*(C'\fR instructions into a
\&\f(CW\*(C`movih\*(C'\fR/\f(CW\*(C`ori\*(C'\fR pair.
.IP \fB\-melrw\fR 4
.IX Item "-melrw"
.PD 0
.IP \fB\-mno\-elrw\fR 4
.IX Item "-mno-elrw"
.PD
Enable/disable extended \f(CW\*(C`lrw\*(C'\fR instructions.
This option is enabled by default for CK800\-series processors.
.IP \fB\-mlaf\fR 4
.IX Item "-mlaf"
.PD 0
.IP \fB\-mliterals\-after\-func\fR 4
.IX Item "-mliterals-after-func"
.IP \fB\-mno\-laf\fR 4
.IX Item "-mno-laf"
.IP \fB\-mno\-literals\-after\-func\fR 4
.IX Item "-mno-literals-after-func"
.PD
Enable/disable placement of literal pools after each function.
.IP \fB\-mlabr\fR 4
.IX Item "-mlabr"
.PD 0
.IP \fB\-mliterals\-after\-br\fR 4
.IX Item "-mliterals-after-br"
.IP \fB\-mno\-labr\fR 4
.IX Item "-mno-labr"
.IP \fB\-mnoliterals\-after\-br\fR 4
.IX Item "-mnoliterals-after-br"
.PD
Enable/disable placement of literal pools after unconditional branches.
This option is enabled by default.
.IP \fB\-mistack\fR 4
.IX Item "-mistack"
.PD 0
.IP \fB\-mno\-istack\fR 4
.IX Item "-mno-istack"
.PD
Enable/disable interrupt stack instructions.  This option is enabled by
default on CK801, CK802, and CK802 processors.
.PP
The following options explicitly enable certain optional instructions.
These features are also enabled implicitly by using \f(CW\*(C`\-mcpu=\*(C'\fR to specify
a processor that supports it.
.IP \fB\-mhard\-float\fR 4
.IX Item "-mhard-float"
Enable hard float instructions.
.IP \fB\-mmp\fR 4
.IX Item "-mmp"
Enable multiprocessor instructions.
.IP \fB\-mcp\fR 4
.IX Item "-mcp"
Enable coprocessor instructions.
.IP \fB\-mcache\fR 4
.IX Item "-mcache"
Enable cache prefetch instruction.
.IP \fB\-msecurity\fR 4
.IX Item "-msecurity"
Enable C\-SKY security instructions.
.IP \fB\-mtrust\fR 4
.IX Item "-mtrust"
Enable C\-SKY trust instructions.
.IP \fB\-mdsp\fR 4
.IX Item "-mdsp"
Enable DSP instructions.
.IP \fB\-medsp\fR 4
.IX Item "-medsp"
Enable enhanced DSP instructions.
.IP \fB\-mvdsp\fR 4
.IX Item "-mvdsp"
Enable vector DSP instructions.
.PP
The following options are available when as is configured for
an Epiphany processor.
.IP \fB\-mepiphany\fR 4
.IX Item "-mepiphany"
Specifies that the both 32 and 16 bit instructions are allowed.  This is the
default behavior.
.IP \fB\-mepiphany16\fR 4
.IX Item "-mepiphany16"
Restricts the permitted instructions to just the 16 bit set.
.PP
The following options are available when as is configured for an H8/300
processor.
\&\f(CW@chapter\fR H8/300 Dependent Features
.SS Options
.IX Subsection "Options"
The Renesas H8/300 version of \f(CW\*(C`as\*(C'\fR has one
machine\-dependent option:
.IP \fB\-h\-tick\-hex\fR 4
.IX Item "-h-tick-hex"
Support H\*(Aq00 style hex constants in addition to 0x00 style.
.IP \fB\-mach=\fR\fIname\fR 4
.IX Item "-mach=name"
Sets the H8300 machine variant.  The following machine names
are recognised:
\&\f(CW\*(C`h8300h\*(C'\fR,
\&\f(CW\*(C`h8300hn\*(C'\fR,
\&\f(CW\*(C`h8300s\*(C'\fR,
\&\f(CW\*(C`h8300sn\*(C'\fR,
\&\f(CW\*(C`h8300sx\*(C'\fR and 
\&\f(CW\*(C`h8300sxn\*(C'\fR.
.PP
The following options are available when as is configured for
an i386 processor.
.IP "\fB\-\-32 | \-\-x32 | \-\-64\fR" 4
.IX Item "--32 | --x32 | --64"
Select the word size, either 32 bits or 64 bits.  \fB\-\-32\fR
implies Intel i386 architecture, while \fB\-\-x32\fR and \fB\-\-64\fR
imply AMD x86\-64 architecture with 32\-bit or 64\-bit word\-size
respectively.
.Sp
These options are only available with the ELF object file format, and
require that the necessary BFD support has been included (on a 32\-bit
platform you have to add \-\-enable\-64\-bit\-bfd to configure enable 64\-bit
usage and use x86\-64 as target platform).
.IP \fB\-n\fR 4
.IX Item "-n"
By default, x86 GAS replaces multiple nop instructions used for
alignment within code sections with multi\-byte nop instructions such
as leal 0(%esi,1),%esi.  This switch disables the optimization if a single
byte nop (0x90) is explicitly specified as the fill byte for alignment.
.IP \fB\-\-divide\fR 4
.IX Item "--divide"
On SVR4\-derived platforms, the character \fB/\fR is treated as a comment
character, which means that it cannot be used in expressions.  The
\&\fB\-\-divide\fR option turns \fB/\fR into a normal character.  This does
not disable \fB/\fR at the beginning of a line starting a comment, or
affect using \fB#\fR for starting a comment.
.IP \fB\-march=\fR\fICPU\fR\fB[+\fR\fIEXTENSION\fR\fB...]\fR 4
.IX Item "-march=CPU[+EXTENSION...]"
This option specifies the target processor.  The assembler will
issue an error message if an attempt is made to assemble an instruction
which will not execute on the target processor.  The following
processor names are recognized:
\&\f(CW\*(C`i8086\*(C'\fR,
\&\f(CW\*(C`i186\*(C'\fR,
\&\f(CW\*(C`i286\*(C'\fR,
\&\f(CW\*(C`i386\*(C'\fR,
\&\f(CW\*(C`i486\*(C'\fR,
\&\f(CW\*(C`i586\*(C'\fR,
\&\f(CW\*(C`i686\*(C'\fR,
\&\f(CW\*(C`pentium\*(C'\fR,
\&\f(CW\*(C`pentiumpro\*(C'\fR,
\&\f(CW\*(C`pentiumii\*(C'\fR,
\&\f(CW\*(C`pentiumiii\*(C'\fR,
\&\f(CW\*(C`pentium4\*(C'\fR,
\&\f(CW\*(C`prescott\*(C'\fR,
\&\f(CW\*(C`nocona\*(C'\fR,
\&\f(CW\*(C`core\*(C'\fR,
\&\f(CW\*(C`core2\*(C'\fR,
\&\f(CW\*(C`corei7\*(C'\fR,
\&\f(CW\*(C`iamcu\*(C'\fR,
\&\f(CW\*(C`k6\*(C'\fR,
\&\f(CW\*(C`k6_2\*(C'\fR,
\&\f(CW\*(C`athlon\*(C'\fR,
\&\f(CW\*(C`opteron\*(C'\fR,
\&\f(CW\*(C`k8\*(C'\fR,
\&\f(CW\*(C`amdfam10\*(C'\fR,
\&\f(CW\*(C`bdver1\*(C'\fR,
\&\f(CW\*(C`bdver2\*(C'\fR,
\&\f(CW\*(C`bdver3\*(C'\fR,
\&\f(CW\*(C`bdver4\*(C'\fR,
\&\f(CW\*(C`znver1\*(C'\fR,
\&\f(CW\*(C`znver2\*(C'\fR,
\&\f(CW\*(C`znver3\*(C'\fR,
\&\f(CW\*(C`znver4\*(C'\fR,
\&\f(CW\*(C`znver5\*(C'\fR,
\&\f(CW\*(C`znver6\*(C'\fR,
\&\f(CW\*(C`btver1\*(C'\fR,
\&\f(CW\*(C`btver2\*(C'\fR,
\&\f(CW\*(C`generic32\*(C'\fR and
\&\f(CW\*(C`generic64\*(C'\fR.
.Sp
In addition to the basic instruction set, the assembler can be told to
accept various extension mnemonics.  For example,
\&\f(CW\*(C`\-march=i686+sse4+vmx\*(C'\fR extends \fIi686\fR with \fIsse4\fR and
\&\fIvmx\fR.  The following extensions are currently supported:
\&\f(CW8087\fR,
\&\f(CW287\fR,
\&\f(CW387\fR,
\&\f(CW687\fR,
\&\f(CW\*(C`cmov\*(C'\fR,
\&\f(CW\*(C`fxsr\*(C'\fR,
\&\f(CW\*(C`mmx\*(C'\fR,
\&\f(CW\*(C`sse\*(C'\fR,
\&\f(CW\*(C`sse2\*(C'\fR,
\&\f(CW\*(C`sse3\*(C'\fR,
\&\f(CW\*(C`sse4a\*(C'\fR,
\&\f(CW\*(C`ssse3\*(C'\fR,
\&\f(CW\*(C`sse4.1\*(C'\fR,
\&\f(CW\*(C`sse4.2\*(C'\fR,
\&\f(CW\*(C`sse4\*(C'\fR,
\&\f(CW\*(C`avx\*(C'\fR,
\&\f(CW\*(C`avx2\*(C'\fR,
\&\f(CW\*(C`lahf_sahf\*(C'\fR,
\&\f(CW\*(C`monitor\*(C'\fR,
\&\f(CW\*(C`adx\*(C'\fR,
\&\f(CW\*(C`rdseed\*(C'\fR,
\&\f(CW\*(C`prfchw\*(C'\fR,
\&\f(CW\*(C`smap\*(C'\fR,
\&\f(CW\*(C`mpx\*(C'\fR,
\&\f(CW\*(C`sha\*(C'\fR,
\&\f(CW\*(C`rdpid\*(C'\fR,
\&\f(CW\*(C`ptwrite\*(C'\fR,
\&\f(CW\*(C`cet\*(C'\fR,
\&\f(CW\*(C`gfni\*(C'\fR,
\&\f(CW\*(C`vaes\*(C'\fR,
\&\f(CW\*(C`vpclmulqdq\*(C'\fR,
\&\f(CW\*(C`prefetchwt1\*(C'\fR,
\&\f(CW\*(C`clflushopt\*(C'\fR,
\&\f(CW\*(C`se1\*(C'\fR,
\&\f(CW\*(C`clwb\*(C'\fR,
\&\f(CW\*(C`movdiri\*(C'\fR,
\&\f(CW\*(C`movdir64b\*(C'\fR,
\&\f(CW\*(C`enqcmd\*(C'\fR,
\&\f(CW\*(C`serialize\*(C'\fR,
\&\f(CW\*(C`tsxldtrk\*(C'\fR,
\&\f(CW\*(C`kl\*(C'\fR,
\&\f(CW\*(C`widekl\*(C'\fR,
\&\f(CW\*(C`hreset\*(C'\fR,
\&\f(CW\*(C`avx512f\*(C'\fR,
\&\f(CW\*(C`avx512cd\*(C'\fR,
\&\f(CW\*(C`avx512er\*(C'\fR,
\&\f(CW\*(C`avx512pf\*(C'\fR,
\&\f(CW\*(C`avx512vl\*(C'\fR,
\&\f(CW\*(C`avx512bw\*(C'\fR,
\&\f(CW\*(C`avx512dq\*(C'\fR,
\&\f(CW\*(C`avx512ifma\*(C'\fR,
\&\f(CW\*(C`avx512vbmi\*(C'\fR,
\&\f(CW\*(C`avx512_4fmaps\*(C'\fR,
\&\f(CW\*(C`avx512_4vnniw\*(C'\fR,
\&\f(CW\*(C`avx512_vpopcntdq\*(C'\fR,
\&\f(CW\*(C`avx512_vbmi2\*(C'\fR,
\&\f(CW\*(C`avx512_vnni\*(C'\fR,
\&\f(CW\*(C`avx512_bitalg\*(C'\fR,
\&\f(CW\*(C`avx512_vp2intersect\*(C'\fR,
\&\f(CW\*(C`tdx\*(C'\fR,
\&\f(CW\*(C`avx512_bf16\*(C'\fR,
\&\f(CW\*(C`avx_vnni\*(C'\fR,
\&\f(CW\*(C`avx512_fp16\*(C'\fR,
\&\f(CW\*(C`avx512_bmm\*(C'\fR,
\&\f(CW\*(C`prefetchi\*(C'\fR,
\&\f(CW\*(C`avx_ifma\*(C'\fR,
\&\f(CW\*(C`avx_vnni_int8\*(C'\fR,
\&\f(CW\*(C`cmpccxadd\*(C'\fR,
\&\f(CW\*(C`wrmsrns\*(C'\fR,
\&\f(CW\*(C`msrlist\*(C'\fR,
\&\f(CW\*(C`avx_ne_convert\*(C'\fR,
\&\f(CW\*(C`rao_int\*(C'\fR,
\&\f(CW\*(C`fred\*(C'\fR,
\&\f(CW\*(C`lkgs\*(C'\fR,
\&\f(CW\*(C`avx_vnni_int16\*(C'\fR,
\&\f(CW\*(C`sha512\*(C'\fR,
\&\f(CW\*(C`sm3\*(C'\fR,
\&\f(CW\*(C`sm4\*(C'\fR,
\&\f(CW\*(C`pbndkb\*(C'\fR,
\&\f(CW\*(C`avx10.1\*(C'\fR,
\&\f(CW\*(C`avx10.1/512\*(C'\fR,
\&\f(CW\*(C`avx10.1/256\*(C'\fR,
\&\f(CW\*(C`avx10.1/128\*(C'\fR,
\&\f(CW\*(C`user_msr\*(C'\fR,
\&\f(CW\*(C`msr_imm\*(C'\fR,
\&\f(CW\*(C`apx_f\*(C'\fR,
\&\f(CW\*(C`apx_nci\*(C'\fR,
\&\f(CW\*(C`apx_ndd\*(C'\fR,
\&\f(CW\*(C`apx_nf\*(C'\fR,
\&\f(CW\*(C`apx_nci_ndd_nf\*(C'\fR,
\&\f(CW\*(C`avx10.2\*(C'\fR,
\&\f(CW\*(C`avx10.2/512\*(C'\fR,
\&\f(CW\*(C`avx10.2/256\*(C'\fR,
\&\f(CW\*(C`avx10.2/128\*(C'\fR,
\&\f(CW\*(C`movrs\*(C'\fR,
\&\f(CW\*(C`amx_int8\*(C'\fR,
\&\f(CW\*(C`amx_bf16\*(C'\fR,
\&\f(CW\*(C`amx_fp16\*(C'\fR,
\&\f(CW\*(C`amx_complex\*(C'\fR,
\&\f(CW\*(C`amx_transpose\*(C'\fR,
\&\f(CW\*(C`amx_tf32\*(C'\fR,
\&\f(CW\*(C`amx_fp8\*(C'\fR
\&\f(CW\*(C`amx_movrs\*(C'\fR,
\&\f(CW\*(C`amx_avx512\*(C'\fR,
\&\f(CW\*(C`amx_tile\*(C'\fR,
\&\f(CW\*(C`vmx\*(C'\fR,
\&\f(CW\*(C`vmfunc\*(C'\fR,
\&\f(CW\*(C`smx\*(C'\fR,
\&\f(CW\*(C`xsave\*(C'\fR,
\&\f(CW\*(C`xsaveopt\*(C'\fR,
\&\f(CW\*(C`xsavec\*(C'\fR,
\&\f(CW\*(C`xsaves\*(C'\fR,
\&\f(CW\*(C`aes\*(C'\fR,
\&\f(CW\*(C`pclmul\*(C'\fR,
\&\f(CW\*(C`fsgsbase\*(C'\fR,
\&\f(CW\*(C`rdrnd\*(C'\fR,
\&\f(CW\*(C`f16c\*(C'\fR,
\&\f(CW\*(C`bmi2\*(C'\fR,
\&\f(CW\*(C`fma\*(C'\fR,
\&\f(CW\*(C`movbe\*(C'\fR,
\&\f(CW\*(C`ept\*(C'\fR,
\&\f(CW\*(C`lzcnt\*(C'\fR,
\&\f(CW\*(C`popcnt\*(C'\fR,
\&\f(CW\*(C`hle\*(C'\fR,
\&\f(CW\*(C`rtm\*(C'\fR,
\&\f(CW\*(C`tsx\*(C'\fR,
\&\f(CW\*(C`invpcid\*(C'\fR,
\&\f(CW\*(C`clflush\*(C'\fR,
\&\f(CW\*(C`mwaitx\*(C'\fR,
\&\f(CW\*(C`clzero\*(C'\fR,
\&\f(CW\*(C`wbnoinvd\*(C'\fR,
\&\f(CW\*(C`pconfig\*(C'\fR,
\&\f(CW\*(C`waitpkg\*(C'\fR,
\&\f(CW\*(C`uintr\*(C'\fR,
\&\f(CW\*(C`cldemote\*(C'\fR,
\&\f(CW\*(C`rdpru\*(C'\fR,
\&\f(CW\*(C`mcommit\*(C'\fR,
\&\f(CW\*(C`sev_es\*(C'\fR,
\&\f(CW\*(C`lwp\*(C'\fR,
\&\f(CW\*(C`fma4\*(C'\fR,
\&\f(CW\*(C`xop\*(C'\fR,
\&\f(CW\*(C`cx16\*(C'\fR,
\&\f(CW\*(C`syscall\*(C'\fR,
\&\f(CW\*(C`rdtscp\*(C'\fR,
\&\f(CW\*(C`3dnow\*(C'\fR,
\&\f(CW\*(C`3dnowa\*(C'\fR,
\&\f(CW\*(C`sse4a\*(C'\fR,
\&\f(CW\*(C`sse5\*(C'\fR,
\&\f(CW\*(C`snp\*(C'\fR,
\&\f(CW\*(C`invlpgb\*(C'\fR,
\&\f(CW\*(C`tlbsync\*(C'\fR,
\&\f(CW\*(C`rmpquery\*(C'\fR,
\&\f(CW\*(C`rmpread\*(C'\fR,
\&\f(CW\*(C`svme\*(C'\fR,
\&\f(CW\*(C`gmism2\*(C'\fR,
\&\f(CW\*(C`gmiccs\*(C'\fR,
\&\f(CW\*(C`padlockrng2\*(C'\fR,
\&\f(CW\*(C`padlockphe2\*(C'\fR,
\&\f(CW\*(C`padlockxmodx\*(C'\fR and
\&\f(CW\*(C`padlock\*(C'\fR.
Note that these extension mnemonics can be prefixed with \f(CW\*(C`no\*(C'\fR to revoke
the respective (and any dependent) functionality.  Note further that the
suffixes permitted on \f(CW\*(C`\-march=avx10.<N>\*(C'\fR enforce a vector length
restriction, i.e. despite these otherwise being "enabling" options, using
these suffixes will disable all insns with wider vector or mask register
operands.
.Sp
When the \f(CW\*(C`.arch\*(C'\fR directive is used with \fB\-march\fR, the
\&\f(CW\*(C`.arch\*(C'\fR directive will take precedent.
.IP \fB\-mtune=\fR\fICPU\fR 4
.IX Item "-mtune=CPU"
This option specifies a processor to optimize for. When used in
conjunction with the \fB\-march\fR option, only instructions
of the processor specified by the \fB\-march\fR option will be
generated.
.Sp
Valid \fICPU\fR values are identical to the processor list of
\&\fB\-march=\fR\fICPU\fR.
.IP \fB\-moperand\-check=\fR\fInone\fR 4
.IX Item "-moperand-check=none"
.PD 0
.IP \fB\-moperand\-check=\fR\fIwarning\fR 4
.IX Item "-moperand-check=warning"
.IP \fB\-moperand\-check=\fR\fIerror\fR 4
.IX Item "-moperand-check=error"
.PD
These options control if the assembler should check certain instruction
operands or operand combinations.  An example instructions where operand size
cannot be inferred from its operands and also hasn\*(Aqt been specified by way of
an instruction suffix.
\&\fB\-moperand\-check=\fR\fInone\fR will make the assembler not perform
these checks.  \fB\-moperand\-check=\fR\fIwarning\fR will make the assembler
issue a warning when respective checks fail, which is the default.
\&\fB\-moperand\-check=\fR\fIerror\fR will make the assembler issue an error
when respective checks fail.
.IP \fB\-msse2avx\fR 4
.IX Item "-msse2avx"
This option specifies that the assembler should encode SSE instructions
with VEX prefix, requiring AVX to be available.  SSE instructions using
extended GPRs will be encoded with EVEX prefix, requiring AVX512 or AVX10 to
be available.
.IP \fB\-muse\-unaligned\-vector\-move\fR 4
.IX Item "-muse-unaligned-vector-move"
This option specifies that the assembler should encode aligned vector
move as unaligned vector move.
.IP \fB\-msse\-check=\fR\fInone\fR 4
.IX Item "-msse-check=none"
.PD 0
.IP \fB\-msse\-check=\fR\fIwarning\fR 4
.IX Item "-msse-check=warning"
.IP \fB\-msse\-check=\fR\fIerror\fR 4
.IX Item "-msse-check=error"
.PD
These options control if the assembler should check SSE instructions.
\&\fB\-msse\-check=\fR\fInone\fR will make the assembler not to check SSE
instructions,  which is the default.  \fB\-msse\-check=\fR\fIwarning\fR
will make the assembler issue a warning for any SSE instruction.
\&\fB\-msse\-check=\fR\fIerror\fR will make the assembler issue an error
for any SSE instruction.
.IP \fB\-mavxscalar=\fR\fI128\fR 4
.IX Item "-mavxscalar=128"
.PD 0
.IP \fB\-mavxscalar=\fR\fI256\fR 4
.IX Item "-mavxscalar=256"
.PD
These options control how the assembler should encode scalar AVX
instructions.  \fB\-mavxscalar=\fR\fI128\fR will encode scalar
AVX instructions with 128bit vector length, which is the default.
\&\fB\-mavxscalar=\fR\fI256\fR will encode scalar AVX instructions
with 256bit vector length.
.Sp
WARNING: Don\*(Aqt use this for production code \- due to CPU errata the
resulting code may not work on certain models.
.IP \fB\-mvexwig=\fR\fI0\fR 4
.IX Item "-mvexwig=0"
.PD 0
.IP \fB\-mvexwig=\fR\fI1\fR 4
.IX Item "-mvexwig=1"
.PD
These options control how the assembler should encode VEX.W\-ignored (WIG)
VEX instructions.  \fB\-mvexwig=\fR\fI0\fR will encode WIG VEX
instructions with vex.w = 0, which is the default.
\&\fB\-mvexwig=\fR\fI1\fR will encode WIG EVEX instructions with
vex.w = 1.
.Sp
WARNING: Don\*(Aqt use this for production code \- due to CPU errata the
resulting code may not work on certain models.
.IP \fB\-mevexlig=\fR\fI128\fR 4
.IX Item "-mevexlig=128"
.PD 0
.IP \fB\-mevexlig=\fR\fI256\fR 4
.IX Item "-mevexlig=256"
.IP \fB\-mevexlig=\fR\fI512\fR 4
.IX Item "-mevexlig=512"
.PD
These options control how the assembler should encode length\-ignored
(LIG) EVEX instructions.  \fB\-mevexlig=\fR\fI128\fR will encode LIG
EVEX instructions with 128bit vector length, which is the default.
\&\fB\-mevexlig=\fR\fI256\fR and \fB\-mevexlig=\fR\fI512\fR will
encode LIG EVEX instructions with 256bit and 512bit vector length,
respectively.
.IP \fB\-mevexwig=\fR\fI0\fR 4
.IX Item "-mevexwig=0"
.PD 0
.IP \fB\-mevexwig=\fR\fI1\fR 4
.IX Item "-mevexwig=1"
.PD
These options control how the assembler should encode w\-ignored (WIG)
EVEX instructions.  \fB\-mevexwig=\fR\fI0\fR will encode WIG
EVEX instructions with evex.w = 0, which is the default.
\&\fB\-mevexwig=\fR\fI1\fR will encode WIG EVEX instructions with
evex.w = 1.
.IP \fB\-mmnemonic=\fR\fIatt\fR 4
.IX Item "-mmnemonic=att"
.PD 0
.IP \fB\-mmnemonic=\fR\fIintel\fR 4
.IX Item "-mmnemonic=intel"
.PD
This option specifies instruction mnemonic for matching instructions.
The \f(CW\*(C`.att_mnemonic\*(C'\fR and \f(CW\*(C`.intel_mnemonic\*(C'\fR directives will
take precedent.
.IP \fB\-msyntax=\fR\fIatt\fR 4
.IX Item "-msyntax=att"
.PD 0
.IP \fB\-msyntax=\fR\fIintel\fR 4
.IX Item "-msyntax=intel"
.PD
This option specifies instruction syntax when processing instructions.
The \f(CW\*(C`.att_syntax\*(C'\fR and \f(CW\*(C`.intel_syntax\*(C'\fR directives will
take precedent.
.IP \fB\-mnaked\-reg\fR 4
.IX Item "-mnaked-reg"
This option specifies that registers don\*(Aqt require a \fB%\fR prefix.
The \f(CW\*(C`.att_syntax\*(C'\fR and \f(CW\*(C`.intel_syntax\*(C'\fR directives will take precedent.
.IP \fB\-madd\-bnd\-prefix\fR 4
.IX Item "-madd-bnd-prefix"
This option forces the assembler to add BND prefix to all branches, even
if such prefix was not explicitly specified in the source code.
.IP \fB\-mno\-shared\fR 4
.IX Item "-mno-shared"
On ELF target, the assembler normally optimizes out non\-PLT relocations
against defined non\-weak global branch targets with default visibility.
The \fB\-mshared\fR option tells the assembler to generate code which
may go into a shared library where all non\-weak global branch targets
with default visibility can be preempted.  The resulting code is
slightly bigger.  This option only affects the handling of branch
instructions.
.IP \fB\-mbig\-obj\fR 4
.IX Item "-mbig-obj"
On PE/COFF target this option forces the use of big object file
format, which allows more than 32768 sections.
.IP \fB\-momit\-lock\-prefix=\fR\fIno\fR 4
.IX Item "-momit-lock-prefix=no"
.PD 0
.IP \fB\-momit\-lock\-prefix=\fR\fIyes\fR 4
.IX Item "-momit-lock-prefix=yes"
.PD
These options control how the assembler should encode lock prefix.
This option is intended as a workaround for processors, that fail on
lock prefix. This option can only be safely used with single\-core,
single\-thread computers
\&\fB\-momit\-lock\-prefix=\fR\fIyes\fR will omit all lock prefixes.
\&\fB\-momit\-lock\-prefix=\fR\fIno\fR will encode lock prefix as usual,
which is the default.
.IP \fB\-mfence\-as\-lock\-add=\fR\fIno\fR 4
.IX Item "-mfence-as-lock-add=no"
.PD 0
.IP \fB\-mfence\-as\-lock\-add=\fR\fIyes\fR 4
.IX Item "-mfence-as-lock-add=yes"
.PD
These options control how the assembler should encode lfence, mfence and
sfence.
\&\fB\-mfence\-as\-lock\-add=\fR\fIyes\fR will encode lfence, mfence and
sfence as \fBlock addl \fR\f(CB$0x0\fR\fB, (%rsp)\fR in 64\-bit mode and
\&\fBlock addl \fR\f(CB$0x0\fR\fB, (%esp)\fR in 32\-bit mode.
\&\fB\-mfence\-as\-lock\-add=\fR\fIno\fR will encode lfence, mfence and
sfence as usual, which is the default.
.IP \fB\-mrelax\-relocations=\fR\fIno\fR 4
.IX Item "-mrelax-relocations=no"
.PD 0
.IP \fB\-mrelax\-relocations=\fR\fIyes\fR 4
.IX Item "-mrelax-relocations=yes"
.PD
These options control whether the assembler should generate relax
relocations, R_386_GOT32X, in 32\-bit mode, or R_X86_64_GOTPCRELX and
R_X86_64_REX_GOTPCRELX, in 64\-bit mode.
\&\fB\-mrelax\-relocations=\fR\fIyes\fR will generate relax relocations.
\&\fB\-mrelax\-relocations=\fR\fIno\fR will not generate relax
relocations.
.IP \fB\-mtls\-check=\fR\fIno\fR 4
.IX Item "-mtls-check=no"
.PD 0
.IP \fB\-mtls\-check=\fR\fIyes\fR 4
.IX Item "-mtls-check=yes"
.PD
These options control whether the assembler check tls relocation.
\&\fB\-mtls\-check=\fR\fIyes\fR will check tls relocation.
\&\fB\-mtls\-check=\fR\fIno\fR will not check tls relocation
The default can be controlled by a configure option
\&\fB\-\-enable\-x86\-tls\-check\fR.
.IP \fB\-malign\-branch\-boundary=\fR\fINUM\fR 4
.IX Item "-malign-branch-boundary=NUM"
This option controls how the assembler should align branches with segment
prefixes or NOP.  \fINUM\fR must be a power of 2.  It should be 0 or
no less than 16.  Branches will be aligned within \fINUM\fR byte
boundary.  \fB\-malign\-branch\-boundary=0\fR, which is the default,
doesn\*(Aqt align branches.
.IP \fB\-malign\-branch=\fR\fITYPE\fR\fB[+\fR\fITYPE\fR\fB...]\fR 4
.IX Item "-malign-branch=TYPE[+TYPE...]"
This option specifies types of branches to align. \fITYPE\fR is
combination of \fBjcc\fR, which aligns conditional jumps,
\&\fBfused\fR, which aligns fused conditional jumps, \fBjmp\fR,
which aligns unconditional jumps, \fBcall\fR which aligns calls,
\&\fBret\fR, which aligns rets, \fBindirect\fR, which aligns indirect
jumps and calls.  The default is \fB\-malign\-branch=jcc+fused+jmp\fR.
.IP \fB\-malign\-branch\-prefix\-size=\fR\fINUM\fR 4
.IX Item "-malign-branch-prefix-size=NUM"
This option specifies the maximum number of prefixes on an instruction
to align branches.  \fINUM\fR should be between 0 and 5.  The default
\&\fINUM\fR is 5.
.IP \fB\-mbranches\-within\-32B\-boundaries\fR 4
.IX Item "-mbranches-within-32B-boundaries"
This option aligns conditional jumps, fused conditional jumps and
unconditional jumps within 32 byte boundary with up to 5 segment prefixes
on an instruction.  It is equivalent to
\&\fB\-malign\-branch\-boundary=32\fR
\&\fB\-malign\-branch=jcc+fused+jmp\fR
\&\fB\-malign\-branch\-prefix\-size=5\fR.
The default doesn\*(Aqt align branches.
.IP \fB\-mlfence\-after\-load=\fR\fIno\fR 4
.IX Item "-mlfence-after-load=no"
.PD 0
.IP \fB\-mlfence\-after\-load=\fR\fIyes\fR 4
.IX Item "-mlfence-after-load=yes"
.PD
These options control whether the assembler should generate lfence
after load instructions.  \fB\-mlfence\-after\-load=\fR\fIyes\fR will
generate lfence.  \fB\-mlfence\-after\-load=\fR\fIno\fR will not generate
lfence, which is the default.
.IP \fB\-mlfence\-before\-indirect\-branch=\fR\fInone\fR 4
.IX Item "-mlfence-before-indirect-branch=none"
.PD 0
.IP \fB\-mlfence\-before\-indirect\-branch=\fR\fIall\fR 4
.IX Item "-mlfence-before-indirect-branch=all"
.IP \fB\-mlfence\-before\-indirect\-branch=\fR\fIregister\fR 4
.IX Item "-mlfence-before-indirect-branch=register"
.IP \fB\-mlfence\-before\-indirect\-branch=\fR\fImemory\fR 4
.IX Item "-mlfence-before-indirect-branch=memory"
.PD
These options control whether the assembler should generate lfence
before indirect near branch instructions.
\&\fB\-mlfence\-before\-indirect\-branch=\fR\fIall\fR will generate lfence
before indirect near branch via register and issue a warning before
indirect near branch via memory.
It also implicitly sets \fB\-mlfence\-before\-ret=\fR\fIshl\fR when
there\*(Aqs no explicit \fB\-mlfence\-before\-ret=\fR.
\&\fB\-mlfence\-before\-indirect\-branch=\fR\fIregister\fR will generate
lfence before indirect near branch via register.
\&\fB\-mlfence\-before\-indirect\-branch=\fR\fImemory\fR will issue a
warning before indirect near branch via memory.
\&\fB\-mlfence\-before\-indirect\-branch=\fR\fInone\fR will not generate
lfence nor issue warning, which is the default.  Note that lfence won\*(Aqt
be generated before indirect near branch via register with
\&\fB\-mlfence\-after\-load=\fR\fIyes\fR since lfence will be generated
after loading branch target register.
.IP \fB\-mlfence\-before\-ret=\fR\fInone\fR 4
.IX Item "-mlfence-before-ret=none"
.PD 0
.IP \fB\-mlfence\-before\-ret=\fR\fIshl\fR 4
.IX Item "-mlfence-before-ret=shl"
.IP \fB\-mlfence\-before\-ret=\fR\fIor\fR 4
.IX Item "-mlfence-before-ret=or"
.IP \fB\-mlfence\-before\-ret=\fR\fIyes\fR 4
.IX Item "-mlfence-before-ret=yes"
.IP \fB\-mlfence\-before\-ret=\fR\fInot\fR 4
.IX Item "-mlfence-before-ret=not"
.PD
These options control whether the assembler should generate lfence
before ret.  \fB\-mlfence\-before\-ret=\fR\fIor\fR will generate
generate or instruction with lfence.
\&\fB\-mlfence\-before\-ret=\fR\fIshl/yes\fR will generate shl instruction
with lfence. \fB\-mlfence\-before\-ret=\fR\fInot\fR will generate not
instruction with lfence. \fB\-mlfence\-before\-ret=\fR\fInone\fR will not
generate lfence, which is the default.
.IP \fB\-mx86\-used\-note=\fR\fIno\fR 4
.IX Item "-mx86-used-note=no"
.PD 0
.IP \fB\-mx86\-used\-note=\fR\fIyes\fR 4
.IX Item "-mx86-used-note=yes"
.PD
These options control whether the assembler should generate
GNU_PROPERTY_X86_ISA_1_USED and GNU_PROPERTY_X86_FEATURE_2_USED
GNU property notes.  The default can be controlled by the
\&\fB\-\-enable\-x86\-used\-note\fR configure option.
.IP \fB\-mevexrcig=\fR\fIrne\fR 4
.IX Item "-mevexrcig=rne"
.PD 0
.IP \fB\-mevexrcig=\fR\fIrd\fR 4
.IX Item "-mevexrcig=rd"
.IP \fB\-mevexrcig=\fR\fIru\fR 4
.IX Item "-mevexrcig=ru"
.IP \fB\-mevexrcig=\fR\fIrz\fR 4
.IX Item "-mevexrcig=rz"
.PD
These options control how the assembler should encode SAE\-only
EVEX instructions.  \fB\-mevexrcig=\fR\fIrne\fR will encode RC bits
of EVEX instruction with 00, which is the default.
\&\fB\-mevexrcig=\fR\fIrd\fR, \fB\-mevexrcig=\fR\fIru\fR
and \fB\-mevexrcig=\fR\fIrz\fR will encode SAE\-only EVEX instructions
with 01, 10 and 11 RC bits, respectively.
.IP \fB\-mamd64\fR 4
.IX Item "-mamd64"
.PD 0
.IP \fB\-mintel64\fR 4
.IX Item "-mintel64"
.PD
This option specifies that the assembler should accept only AMD64 or
Intel64 ISA in 64\-bit mode.  The default is to accept common, Intel64
only and AMD64 ISAs.
.IP "\fB\-O0 | \-O | \-O1 | \-O2 | \-Os\fR" 4
.IX Item "-O0 | -O | -O1 | -O2 | -Os"
Optimize instruction encoding with smaller instruction size.  \fB\-O\fR
and \fB\-O1\fR encode 64\-bit register load instructions with 64\-bit
immediate as 32\-bit register load instructions with 31\-bit or 32\-bits
immediates, encode 64\-bit register clearing instructions with 32\-bit
register clearing instructions, encode 256\-bit/512\-bit VEX/EVEX vector
register clearing instructions with 128\-bit VEX vector register
clearing instructions, encode 128\-bit/256\-bit EVEX vector
register load/store instructions with VEX vector register load/store
instructions, and encode 128\-bit/256\-bit EVEX packed integer logical
instructions with 128\-bit/256\-bit VEX packed integer logical.
.Sp
\&\fB\-O2\fR includes \fB\-O1\fR optimization plus encodes
256\-bit/512\-bit EVEX vector register clearing instructions with 128\-bit
EVEX vector register clearing instructions.  In 64\-bit mode VEX encoded
instructions with commutative source operands will also have their
source operands swapped if this allows using the 2\-byte VEX prefix form
instead of the 3\-byte one.  Certain forms of AND as well as OR with the
same (register) operand specified twice will also be changed to TEST.
.Sp
\&\fB\-Os\fR includes \fB\-O2\fR optimization plus encodes 16\-bit, 32\-bit
and 64\-bit register tests with immediate as 8\-bit register test with
immediate.  \fB\-O0\fR turns off this optimization.
.PP
The following options are available when as is configured for the
Ubicom IP2K series.
.IP \fB\-mip2022ext\fR 4
.IX Item "-mip2022ext"
Specifies that the extended IP2022 instructions are allowed.
.IP \fB\-mip2022\fR 4
.IX Item "-mip2022"
Restores the default behaviour, which restricts the permitted instructions to
just the basic IP2022 ones.
.PP
The following options are available when as is configured for the
Renesas M32C and M16C processors.
.IP \fB\-m32c\fR 4
.IX Item "-m32c"
Assemble M32C instructions.
.IP \fB\-m16c\fR 4
.IX Item "-m16c"
Assemble M16C instructions (the default).
.IP \fB\-relax\fR 4
.IX Item "-relax"
Enable support for link\-time relaxations.
.IP \fB\-h\-tick\-hex\fR 4
.IX Item "-h-tick-hex"
Support H\*(Aq00 style hex constants in addition to 0x00 style.
.PP
The following options are available when as is configured for the
Renesas M32R (formerly Mitsubishi M32R) series.
.IP \fB\-\-m32rx\fR 4
.IX Item "--m32rx"
Specify which processor in the M32R family is the target.  The default
is normally the M32R, but this option changes it to the M32RX.
.IP "\fB\-\-warn\-explicit\-parallel\-conflicts or \-\-Wp\fR" 4
.IX Item "--warn-explicit-parallel-conflicts or --Wp"
Produce warning messages when questionable parallel constructs are
encountered.
.IP "\fB\-\-no\-warn\-explicit\-parallel\-conflicts or \-\-Wnp\fR" 4
.IX Item "--no-warn-explicit-parallel-conflicts or --Wnp"
Do not produce warning messages when questionable parallel constructs are
encountered.
.PP
The following options are available when as is configured for the
Motorola 68000 series.
.IP \fB\-l\fR 4
.IX Item "-l"
Shorten references to undefined symbols, to one word instead of two.
.IP "\fB\-m68000 | \-m68008 | \-m68010 | \-m68020 | \-m68030\fR" 4
.IX Item "-m68000 | -m68008 | -m68010 | -m68020 | -m68030"
.PD 0
.IP "\fB| \-m68040 | \-m68060 | \-m68302 | \-m68331 | \-m68332\fR" 4
.IX Item "| -m68040 | -m68060 | -m68302 | -m68331 | -m68332"
.IP "\fB| \-m68333 | \-m68340 | \-mcpu32 | \-m5200\fR" 4
.IX Item "| -m68333 | -m68340 | -mcpu32 | -m5200"
.PD
Specify what processor in the 68000 family is the target.  The default
is normally the 68020, but this can be changed at configuration time.
.IP "\fB\-m68881 | \-m68882 | \-mno\-68881 | \-mno\-68882\fR" 4
.IX Item "-m68881 | -m68882 | -mno-68881 | -mno-68882"
The target machine does (or does not) have a floating\-point coprocessor.
The default is to assume a coprocessor for 68020, 68030, and cpu32.  Although
the basic 68000 is not compatible with the 68881, a combination of the
two can be specified, since it\*(Aqs possible to do emulation of the
coprocessor instructions with the main processor.
.IP "\fB\-m68851 | \-mno\-68851\fR" 4
.IX Item "-m68851 | -mno-68851"
The target machine does (or does not) have a memory\-management
unit coprocessor.  The default is to assume an MMU for 68020 and up.
.PP
For details about the PDP\-11 machine dependent features options,
see \fBPDP\-11\-Options\fR.
.IP "\fB\-mpic | \-mno\-pic\fR" 4
.IX Item "-mpic | -mno-pic"
Generate position\-independent (or position\-dependent) code.  The
default is \fB\-mpic\fR.
.IP \fB\-mall\fR 4
.IX Item "-mall"
.PD 0
.IP \fB\-mall\-extensions\fR 4
.IX Item "-mall-extensions"
.PD
Enable all instruction set extensions.  This is the default.
.IP \fB\-mno\-extensions\fR 4
.IX Item "-mno-extensions"
Disable all instruction set extensions.
.IP "\fB\-m\fR\fIextension\fR \fB| \-mno\-\fR\fIextension\fR" 4
.IX Item "-mextension | -mno-extension"
Enable (or disable) a particular instruction set extension.
.IP \fB\-m\fR\fIcpu\fR 4
.IX Item "-mcpu"
Enable the instruction set extensions supported by a particular CPU, and
disable all other extensions.
.IP \fB\-m\fR\fImachine\fR 4
.IX Item "-mmachine"
Enable the instruction set extensions supported by a particular machine
model, and disable all other extensions.
.PP
The following options are available when as is configured for
a picoJava processor.
.IP \fB\-mb\fR 4
.IX Item "-mb"
Generate "big endian" format output.
.IP \fB\-ml\fR 4
.IX Item "-ml"
Generate "little endian" format output.
.PP
The following options are available when as is configured for a
PRU processor.
.IP \fB\-mlink\-relax\fR 4
.IX Item "-mlink-relax"
Assume that LD would optimize LDI32 instructions by checking the upper
16 bits of the \fIexpression\fR. If they are all zeros, then LD would
shorten the LDI32 instruction to a single LDI. In such case \f(CW\*(C`as\*(C'\fR
will output DIFF relocations for diff expressions.
.IP \fB\-mno\-link\-relax\fR 4
.IX Item "-mno-link-relax"
Assume that LD would not optimize LDI32 instructions. As a consequence,
DIFF relocations will not be emitted.
.IP \fB\-mno\-warn\-regname\-label\fR 4
.IX Item "-mno-warn-regname-label"
Do not warn if a label name matches a register name. Usually assembler
programmers will want this warning to be emitted. C compilers may want
to turn this off.
.PP
The following options are available when as is configured for
a MIPS processor.
.IP "\fB\-G\fR \fInum\fR" 4
.IX Item "-G num"
This option sets the largest size of an object that can be referenced
implicitly with the \f(CW\*(C`gp\*(C'\fR register.  It is only accepted for targets that
use ECOFF format, such as a DECstation running Ultrix.  The default value is 8.
.IP \fB\-EB\fR 4
.IX Item "-EB"
Generate "big endian" format output.
.IP \fB\-EL\fR 4
.IX Item "-EL"
Generate "little endian" format output.
.IP \fB\-mips1\fR 4
.IX Item "-mips1"
.PD 0
.IP \fB\-mips2\fR 4
.IX Item "-mips2"
.IP \fB\-mips3\fR 4
.IX Item "-mips3"
.IP \fB\-mips4\fR 4
.IX Item "-mips4"
.IP \fB\-mips5\fR 4
.IX Item "-mips5"
.IP \fB\-mips32\fR 4
.IX Item "-mips32"
.IP \fB\-mips32r2\fR 4
.IX Item "-mips32r2"
.IP \fB\-mips32r3\fR 4
.IX Item "-mips32r3"
.IP \fB\-mips32r5\fR 4
.IX Item "-mips32r5"
.IP \fB\-mips32r6\fR 4
.IX Item "-mips32r6"
.IP \fB\-mips64\fR 4
.IX Item "-mips64"
.IP \fB\-mips64r2\fR 4
.IX Item "-mips64r2"
.IP \fB\-mips64r3\fR 4
.IX Item "-mips64r3"
.IP \fB\-mips64r5\fR 4
.IX Item "-mips64r5"
.IP \fB\-mips64r6\fR 4
.IX Item "-mips64r6"
.PD
Generate code for a particular MIPS Instruction Set Architecture level.
\&\fB\-mips1\fR is an alias for \fB\-march=r3000\fR, \fB\-mips2\fR is an
alias for \fB\-march=r6000\fR, \fB\-mips3\fR is an alias for
\&\fB\-march=r4000\fR and \fB\-mips4\fR is an alias for \fB\-march=r8000\fR.
\&\fB\-mips5\fR, \fB\-mips32\fR, \fB\-mips32r2\fR, \fB\-mips32r3\fR,
\&\fB\-mips32r5\fR, \fB\-mips32r6\fR, \fB\-mips64\fR, \fB\-mips64r2\fR,
\&\fB\-mips64r3\fR, \fB\-mips64r5\fR, and \fB\-mips64r6\fR correspond to generic
MIPS V, MIPS32, MIPS32 Release 2, MIPS32 Release 3, MIPS32 Release 5, MIPS32
Release 6, MIPS64, MIPS64 Release 2, MIPS64 Release 3, MIPS64 Release 5, and
MIPS64 Release 6 ISA processors, respectively.
.IP \fB\-march=\fR\fIcpu\fR 4
.IX Item "-march=cpu"
Generate code for a particular MIPS CPU.
.IP \fB\-mtune=\fR\fIcpu\fR 4
.IX Item "-mtune=cpu"
Schedule and tune for a particular MIPS CPU.
.IP \fB\-mfix7000\fR 4
.IX Item "-mfix7000"
.PD 0
.IP \fB\-mno\-fix7000\fR 4
.IX Item "-mno-fix7000"
.PD
Cause nops to be inserted if the read of the destination register
of an mfhi or mflo instruction occurs in the following two instructions.
.IP \fB\-mfix\-rm7000\fR 4
.IX Item "-mfix-rm7000"
.PD 0
.IP \fB\-mno\-fix\-rm7000\fR 4
.IX Item "-mno-fix-rm7000"
.PD
Cause nops to be inserted if a dmult or dmultu instruction is
followed by a load instruction.
.IP \fB\-mfix\-r5900\fR 4
.IX Item "-mfix-r5900"
.PD 0
.IP \fB\-mno\-fix\-r5900\fR 4
.IX Item "-mno-fix-r5900"
.PD
Do not attempt to schedule the preceding instruction into the delay slot
of a branch instruction placed at the end of a short loop of six
instructions or fewer and always schedule a \f(CW\*(C`nop\*(C'\fR instruction there
instead.  The short loop bug under certain conditions causes loops to
execute only once or twice, due to a hardware bug in the R5900 chip.
.IP \fB\-mdebug\fR 4
.IX Item "-mdebug"
.PD 0
.IP \fB\-no\-mdebug\fR 4
.IX Item "-no-mdebug"
.PD
Cause stabs\-style debugging output to go into an ECOFF\-style .mdebug
section instead of the standard ELF .stabs sections.
.IP \fB\-mpdr\fR 4
.IX Item "-mpdr"
.PD 0
.IP \fB\-mno\-pdr\fR 4
.IX Item "-mno-pdr"
.PD
Control generation of \f(CW\*(C`.pdr\*(C'\fR sections.
.IP \fB\-mgp32\fR 4
.IX Item "-mgp32"
.PD 0
.IP \fB\-mfp32\fR 4
.IX Item "-mfp32"
.PD
The register sizes are normally inferred from the ISA and ABI, but these
flags force a certain group of registers to be treated as 32 bits wide at
all times.  \fB\-mgp32\fR controls the size of general\-purpose registers
and \fB\-mfp32\fR controls the size of floating\-point registers.
.IP \fB\-mgp64\fR 4
.IX Item "-mgp64"
.PD 0
.IP \fB\-mfp64\fR 4
.IX Item "-mfp64"
.PD
The register sizes are normally inferred from the ISA and ABI, but these
flags force a certain group of registers to be treated as 64 bits wide at
all times.  \fB\-mgp64\fR controls the size of general\-purpose registers
and \fB\-mfp64\fR controls the size of floating\-point registers.
.IP \fB\-mfpxx\fR 4
.IX Item "-mfpxx"
The register sizes are normally inferred from the ISA and ABI, but using
this flag in combination with \fB\-mabi=32\fR enables an ABI variant
which will operate correctly with floating\-point registers which are
32 or 64 bits wide.
.IP \fB\-modd\-spreg\fR 4
.IX Item "-modd-spreg"
.PD 0
.IP \fB\-mno\-odd\-spreg\fR 4
.IX Item "-mno-odd-spreg"
.PD
Enable use of floating\-point operations on odd\-numbered single\-precision
registers when supported by the ISA.  \fB\-mfpxx\fR implies
\&\fB\-mno\-odd\-spreg\fR, otherwise the default is \fB\-modd\-spreg\fR.
.IP \fB\-mips16\fR 4
.IX Item "-mips16"
.PD 0
.IP \fB\-no\-mips16\fR 4
.IX Item "-no-mips16"
.PD
Generate code for the MIPS 16 processor.  This is equivalent to putting
\&\f(CW\*(C`.module mips16\*(C'\fR at the start of the assembly file.  \fB\-no\-mips16\fR
turns off this option.
.IP \fB\-mmips16e2\fR 4
.IX Item "-mmips16e2"
.PD 0
.IP \fB\-mno\-mips16e2\fR 4
.IX Item "-mno-mips16e2"
.PD
Enable the use of MIPS16e2 instructions in MIPS16 mode.  This is equivalent
to putting \f(CW\*(C`.module mips16e2\*(C'\fR at the start of the assembly file.
\&\fB\-mno\-mips16e2\fR turns off this option.
.IP \fB\-mmicromips\fR 4
.IX Item "-mmicromips"
.PD 0
.IP \fB\-mno\-micromips\fR 4
.IX Item "-mno-micromips"
.PD
Generate code for the microMIPS processor.  This is equivalent to putting
\&\f(CW\*(C`.module micromips\*(C'\fR at the start of the assembly file.
\&\fB\-mno\-micromips\fR turns off this option.  This is equivalent to putting
\&\f(CW\*(C`.module nomicromips\*(C'\fR at the start of the assembly file.
.IP \fB\-msmartmips\fR 4
.IX Item "-msmartmips"
.PD 0
.IP \fB\-mno\-smartmips\fR 4
.IX Item "-mno-smartmips"
.PD
Enables the SmartMIPS extension to the MIPS32 instruction set.  This is
equivalent to putting \f(CW\*(C`.module smartmips\*(C'\fR at the start of the assembly
file.  \fB\-mno\-smartmips\fR turns off this option.
.IP \fB\-mips3d\fR 4
.IX Item "-mips3d"
.PD 0
.IP \fB\-no\-mips3d\fR 4
.IX Item "-no-mips3d"
.PD
Generate code for the MIPS\-3D Application Specific Extension.
This tells the assembler to accept MIPS\-3D instructions.
\&\fB\-no\-mips3d\fR turns off this option.
.IP \fB\-mdmx\fR 4
.IX Item "-mdmx"
.PD 0
.IP \fB\-no\-mdmx\fR 4
.IX Item "-no-mdmx"
.PD
Generate code for the MDMX Application Specific Extension.
This tells the assembler to accept MDMX instructions.
\&\fB\-no\-mdmx\fR turns off this option.
.IP \fB\-mdsp\fR 4
.IX Item "-mdsp"
.PD 0
.IP \fB\-mno\-dsp\fR 4
.IX Item "-mno-dsp"
.PD
Generate code for the DSP Release 1 Application Specific Extension.
This tells the assembler to accept DSP Release 1 instructions.
\&\fB\-mno\-dsp\fR turns off this option.
.IP \fB\-mdspr2\fR 4
.IX Item "-mdspr2"
.PD 0
.IP \fB\-mno\-dspr2\fR 4
.IX Item "-mno-dspr2"
.PD
Generate code for the DSP Release 2 Application Specific Extension.
This option implies \fB\-mdsp\fR.
This tells the assembler to accept DSP Release 2 instructions.
\&\fB\-mno\-dspr2\fR turns off this option.
.IP \fB\-mdspr3\fR 4
.IX Item "-mdspr3"
.PD 0
.IP \fB\-mno\-dspr3\fR 4
.IX Item "-mno-dspr3"
.PD
Generate code for the DSP Release 3 Application Specific Extension.
This option implies \fB\-mdsp\fR and \fB\-mdspr2\fR.
This tells the assembler to accept DSP Release 3 instructions.
\&\fB\-mno\-dspr3\fR turns off this option.
.IP \fB\-mmsa\fR 4
.IX Item "-mmsa"
.PD 0
.IP \fB\-mno\-msa\fR 4
.IX Item "-mno-msa"
.PD
Generate code for the MIPS SIMD Architecture Extension.
This tells the assembler to accept MSA instructions.
\&\fB\-mno\-msa\fR turns off this option.
.IP \fB\-mxpa\fR 4
.IX Item "-mxpa"
.PD 0
.IP \fB\-mno\-xpa\fR 4
.IX Item "-mno-xpa"
.PD
Generate code for the MIPS eXtended Physical Address (XPA) Extension.
This tells the assembler to accept XPA instructions.
\&\fB\-mno\-xpa\fR turns off this option.
.IP \fB\-mmt\fR 4
.IX Item "-mmt"
.PD 0
.IP \fB\-mno\-mt\fR 4
.IX Item "-mno-mt"
.PD
Generate code for the MT Application Specific Extension.
This tells the assembler to accept MT instructions.
\&\fB\-mno\-mt\fR turns off this option.
.IP \fB\-mmcu\fR 4
.IX Item "-mmcu"
.PD 0
.IP \fB\-mno\-mcu\fR 4
.IX Item "-mno-mcu"
.PD
Generate code for the MCU Application Specific Extension.
This tells the assembler to accept MCU instructions.
\&\fB\-mno\-mcu\fR turns off this option.
.IP \fB\-mcrc\fR 4
.IX Item "-mcrc"
.PD 0
.IP \fB\-mno\-crc\fR 4
.IX Item "-mno-crc"
.PD
Generate code for the MIPS cyclic redundancy check (CRC) Application
Specific Extension.  This tells the assembler to accept CRC instructions.
\&\fB\-mno\-crc\fR turns off this option.
.IP \fB\-mginv\fR 4
.IX Item "-mginv"
.PD 0
.IP \fB\-mno\-ginv\fR 4
.IX Item "-mno-ginv"
.PD
Generate code for the Global INValidate (GINV) Application Specific
Extension.  This tells the assembler to accept GINV instructions.
\&\fB\-mno\-ginv\fR turns off this option.
.IP \fB\-mloongson\-mmi\fR 4
.IX Item "-mloongson-mmi"
.PD 0
.IP \fB\-mno\-loongson\-mmi\fR 4
.IX Item "-mno-loongson-mmi"
.PD
Generate code for the Loongson MultiMedia extensions Instructions (MMI)
Application Specific Extension.  This tells the assembler to accept MMI
instructions.
\&\fB\-mno\-loongson\-mmi\fR turns off this option.
.IP \fB\-mloongson\-cam\fR 4
.IX Item "-mloongson-cam"
.PD 0
.IP \fB\-mno\-loongson\-cam\fR 4
.IX Item "-mno-loongson-cam"
.PD
Generate code for the Loongson Content Address Memory (CAM) instructions.
This tells the assembler to accept Loongson CAM instructions.
\&\fB\-mno\-loongson\-cam\fR turns off this option.
.IP \fB\-mloongson\-ext\fR 4
.IX Item "-mloongson-ext"
.PD 0
.IP \fB\-mno\-loongson\-ext\fR 4
.IX Item "-mno-loongson-ext"
.PD
Generate code for the Loongson EXTensions (EXT) instructions.
This tells the assembler to accept Loongson EXT instructions.
\&\fB\-mno\-loongson\-ext\fR turns off this option.
.IP \fB\-mloongson\-ext2\fR 4
.IX Item "-mloongson-ext2"
.PD 0
.IP \fB\-mno\-loongson\-ext2\fR 4
.IX Item "-mno-loongson-ext2"
.PD
Generate code for the Loongson EXTensions R2 (EXT2) instructions.
This option implies \fB\-mloongson\-ext\fR.
This tells the assembler to accept Loongson EXT2 instructions.
\&\fB\-mno\-loongson\-ext2\fR turns off this option.
.IP \fB\-minsn32\fR 4
.IX Item "-minsn32"
.PD 0
.IP \fB\-mno\-insn32\fR 4
.IX Item "-mno-insn32"
.PD
Only use 32\-bit instruction encodings when generating code for the
microMIPS processor.  This option inhibits the use of any 16\-bit
instructions.  This is equivalent to putting \f(CW\*(C`.set insn32\*(C'\fR at
the start of the assembly file.  \fB\-mno\-insn32\fR turns off this
option.  This is equivalent to putting \f(CW\*(C`.set noinsn32\*(C'\fR at the
start of the assembly file.  By default \fB\-mno\-insn32\fR is
selected, allowing all instructions to be used.
.IP \fB\-\-construct\-floats\fR 4
.IX Item "--construct-floats"
.PD 0
.IP \fB\-\-no\-construct\-floats\fR 4
.IX Item "--no-construct-floats"
.PD
The \fB\-\-no\-construct\-floats\fR option disables the construction of
double width floating point constants by loading the two halves of the
value into the two single width floating point registers that make up
the double width register.  By default \fB\-\-construct\-floats\fR is
selected, allowing construction of these floating point constants.
.IP \fB\-\-relax\-branch\fR 4
.IX Item "--relax-branch"
.PD 0
.IP \fB\-\-no\-relax\-branch\fR 4
.IX Item "--no-relax-branch"
.PD
The \fB\-\-relax\-branch\fR option enables the relaxation of out\-of\-range
branches.  By default \fB\-\-no\-relax\-branch\fR is selected, causing any
out\-of\-range branches to produce an error.
.IP \fB\-mignore\-branch\-isa\fR 4
.IX Item "-mignore-branch-isa"
.PD 0
.IP \fB\-mno\-ignore\-branch\-isa\fR 4
.IX Item "-mno-ignore-branch-isa"
.PD
Ignore branch checks for invalid transitions between ISA modes.  The
semantics of branches does not provide for an ISA mode switch, so in
most cases the ISA mode a branch has been encoded for has to be the
same as the ISA mode of the branch\*(Aqs target label.  Therefore GAS has
checks implemented that verify in branch assembly that the two ISA
modes match.  \fB\-mignore\-branch\-isa\fR disables these checks.  By
default \fB\-mno\-ignore\-branch\-isa\fR is selected, causing any invalid
branch requiring a transition between ISA modes to produce an error.
.IP \fB\-mnan=\fR\fIencoding\fR 4
.IX Item "-mnan=encoding"
Select between the IEEE 754\-2008 (\fB\-mnan=2008\fR) or the legacy
(\fB\-mnan=legacy\fR) NaN encoding format.  The latter is the default.
.IP \fB\-\-emulation=\fR\fIname\fR 4
.IX Item "--emulation=name"
This option was formerly used to switch between ELF and ECOFF output
on targets like IRIX 5 that supported both.  MIPS ECOFF support was
removed in GAS 2.24, so the option now serves little purpose.
It is retained for backwards compatibility.
.Sp
The available configuration names are: \fBmipself\fR, \fBmipslelf\fR and
\&\fBmipsbelf\fR.  Choosing \fBmipself\fR now has no effect, since the output
is always ELF.  \fBmipslelf\fR and \fBmipsbelf\fR select little\- and
big\-endian output respectively, but \fB\-EL\fR and \fB\-EB\fR are now the
preferred options instead.
.IP \fB\-nocpp\fR 4
.IX Item "-nocpp"
\&\fBas\fR ignores this option.  It is accepted for compatibility with
the native tools.
.IP \fB\-\-trap\fR 4
.IX Item "--trap"
.PD 0
.IP \fB\-\-no\-trap\fR 4
.IX Item "--no-trap"
.IP \fB\-\-break\fR 4
.IX Item "--break"
.IP \fB\-\-no\-break\fR 4
.IX Item "--no-break"
.PD
Control how to deal with multiplication overflow and division by zero.
\&\fB\-\-trap\fR or \fB\-\-no\-break\fR (which are synonyms) take a trap exception
(and only work for Instruction Set Architecture level 2 and higher);
\&\fB\-\-break\fR or \fB\-\-no\-trap\fR (also synonyms, and the default) take a
break exception.
.IP \fB\-n\fR 4
.IX Item "-n"
When this option is used, \fBas\fR will issue a warning every
time it generates a nop instruction from a macro.
.PP
The following options are available when as is configured for a
LoongArch processor.
.IP \fB\-fpic\fR 4
.IX Item "-fpic"
.PD 0
.IP \fB\-fPIC\fR 4
.IX Item "-fPIC"
.PD
Generate position\-independent code
.IP \fB\-fno\-pic\fR 4
.IX Item "-fno-pic"
Don\*(Aqt generate position\-independent code (default)
.PP
The following options are available when as is configured for a
Meta processor.
.ie n .IP """\-mcpu=metac11""" 4
.el .IP \f(CW\-mcpu=metac11\fR 4
.IX Item "-mcpu=metac11"
Generate code for Meta 1.1.
.ie n .IP """\-mcpu=metac12""" 4
.el .IP \f(CW\-mcpu=metac12\fR 4
.IX Item "-mcpu=metac12"
Generate code for Meta 1.2.
.ie n .IP """\-mcpu=metac21""" 4
.el .IP \f(CW\-mcpu=metac21\fR 4
.IX Item "-mcpu=metac21"
Generate code for Meta 2.1.
.ie n .IP """\-mfpu=metac21""" 4
.el .IP \f(CW\-mfpu=metac21\fR 4
.IX Item "-mfpu=metac21"
Allow code to use FPU hardware of Meta 2.1.
.PP
See the info pages for documentation of the MMIX\-specific options.
.PP
The following options are available when as is configured for a
NDS32 processor.
.ie n .IP """\-O1""" 4
.el .IP \f(CW\-O1\fR 4
.IX Item "-O1"
Optimize for performance.
.ie n .IP """\-Os""" 4
.el .IP \f(CW\-Os\fR 4
.IX Item "-Os"
Optimize for space.
.ie n .IP """\-EL""" 4
.el .IP \f(CW\-EL\fR 4
.IX Item "-EL"
Produce little endian data output.
.ie n .IP """\-EB""" 4
.el .IP \f(CW\-EB\fR 4
.IX Item "-EB"
Produce little endian data output.
.ie n .IP """\-mpic""" 4
.el .IP \f(CW\-mpic\fR 4
.IX Item "-mpic"
Generate PIC.
.ie n .IP """\-mno\-fp\-as\-gp\-relax""" 4
.el .IP \f(CW\-mno\-fp\-as\-gp\-relax\fR 4
.IX Item "-mno-fp-as-gp-relax"
Suppress fp\-as\-gp relaxation for this file.
.ie n .IP """\-mb2bb\-relax""" 4
.el .IP \f(CW\-mb2bb\-relax\fR 4
.IX Item "-mb2bb-relax"
Back\-to\-back branch optimization.
.ie n .IP """\-mno\-all\-relax""" 4
.el .IP \f(CW\-mno\-all\-relax\fR 4
.IX Item "-mno-all-relax"
Suppress all relaxation for this file.
.ie n .IP """\-march=<arch name>""" 4
.el .IP "\f(CW\-march=<arch name>\fR" 4
.IX Item "-march=<arch name>"
Assemble for architecture <arch name> which could be v3, v3j, v3m, v3f,
v3s, v2, v2j, v2f, v2s.
.ie n .IP """\-mbaseline=<baseline>""" 4
.el .IP \f(CW\-mbaseline=<baseline>\fR 4
.IX Item "-mbaseline=<baseline>"
Assemble for baseline <baseline> which could be v2, v3, v3m.
.ie n .IP """\-mfpu\-freg=\fIFREG\fR""" 4
.el .IP \f(CW\-mfpu\-freg=\fR\f(CIFREG\fR\f(CW\fR 4
.IX Item "-mfpu-freg=FREG"
Specify a FPU configuration.
.RS 4
.ie n .IP """0      8 SP /  4 DP registers""" 4
.el .IP "\f(CW0      8 SP /  4 DP registers\fR" 4
.IX Item "0 8 SP / 4 DP registers"
.PD 0
.ie n .IP """1     16 SP /  8 DP registers""" 4
.el .IP "\f(CW1     16 SP /  8 DP registers\fR" 4
.IX Item "1 16 SP / 8 DP registers"
.ie n .IP """2     32 SP / 16 DP registers""" 4
.el .IP "\f(CW2     32 SP / 16 DP registers\fR" 4
.IX Item "2 32 SP / 16 DP registers"
.ie n .IP """3     32 SP / 32 DP registers""" 4
.el .IP "\f(CW3     32 SP / 32 DP registers\fR" 4
.IX Item "3 32 SP / 32 DP registers"
.PD
.RE
.RS 4
.RE
.ie n .IP """\-mabi=\fIabi\fR""" 4
.el .IP \f(CW\-mabi=\fR\f(CIabi\fR\f(CW\fR 4
.IX Item "-mabi=abi"
Specify a abi version <abi> could be v1, v2, v2fp, v2fpp.
.ie n .IP """\-m[no\-]mac""" 4
.el .IP \f(CW\-m[no\-]mac\fR 4
.IX Item "-m[no-]mac"
Enable/Disable Multiply instructions support.
.ie n .IP """\-m[no\-]div""" 4
.el .IP \f(CW\-m[no\-]div\fR 4
.IX Item "-m[no-]div"
Enable/Disable Divide instructions support.
.ie n .IP """\-m[no\-]16bit\-ext""" 4
.el .IP \f(CW\-m[no\-]16bit\-ext\fR 4
.IX Item "-m[no-]16bit-ext"
Enable/Disable 16\-bit extension
.ie n .IP """\-m[no\-]dx\-regs""" 4
.el .IP \f(CW\-m[no\-]dx\-regs\fR 4
.IX Item "-m[no-]dx-regs"
Enable/Disable d0/d1 registers
.ie n .IP """\-m[no\-]perf\-ext""" 4
.el .IP \f(CW\-m[no\-]perf\-ext\fR 4
.IX Item "-m[no-]perf-ext"
Enable/Disable Performance extension
.ie n .IP """\-m[no\-]perf2\-ext""" 4
.el .IP \f(CW\-m[no\-]perf2\-ext\fR 4
.IX Item "-m[no-]perf2-ext"
Enable/Disable Performance extension 2
.ie n .IP """\-m[no\-]string\-ext""" 4
.el .IP \f(CW\-m[no\-]string\-ext\fR 4
.IX Item "-m[no-]string-ext"
Enable/Disable String extension
.ie n .IP """\-m[no\-]reduced\-regs""" 4
.el .IP \f(CW\-m[no\-]reduced\-regs\fR 4
.IX Item "-m[no-]reduced-regs"
Enable/Disable Reduced Register configuration (GPR16) option
.ie n .IP """\-m[no\-]audio\-isa\-ext""" 4
.el .IP \f(CW\-m[no\-]audio\-isa\-ext\fR 4
.IX Item "-m[no-]audio-isa-ext"
Enable/Disable AUDIO ISA extension
.ie n .IP """\-m[no\-]fpu\-sp\-ext""" 4
.el .IP \f(CW\-m[no\-]fpu\-sp\-ext\fR 4
.IX Item "-m[no-]fpu-sp-ext"
Enable/Disable FPU SP extension
.ie n .IP """\-m[no\-]fpu\-dp\-ext""" 4
.el .IP \f(CW\-m[no\-]fpu\-dp\-ext\fR 4
.IX Item "-m[no-]fpu-dp-ext"
Enable/Disable FPU DP extension
.ie n .IP """\-m[no\-]fpu\-fma""" 4
.el .IP \f(CW\-m[no\-]fpu\-fma\fR 4
.IX Item "-m[no-]fpu-fma"
Enable/Disable FPU fused\-multiply\-add instructions
.ie n .IP """\-mall\-ext""" 4
.el .IP \f(CW\-mall\-ext\fR 4
.IX Item "-mall-ext"
Turn on all extensions and instructions support
.PP
The following options are available when as is configured for a
PowerPC processor.
.IP \fB\-a32\fR 4
.IX Item "-a32"
Generate ELF32 or XCOFF32.
.IP \fB\-a64\fR 4
.IX Item "-a64"
Generate ELF64 or XCOFF64.
.IP "\fB\-K PIC\fR" 4
.IX Item "-K PIC"
Set EF_PPC_RELOCATABLE_LIB in ELF flags.
.IP "\fB\-mpwrx | \-mpwr2\fR" 4
.IX Item "-mpwrx | -mpwr2"
Generate code for POWER/2 (RIOS2).
.IP \fB\-mpwr\fR 4
.IX Item "-mpwr"
Generate code for POWER (RIOS1)
.IP \fB\-m601\fR 4
.IX Item "-m601"
Generate code for PowerPC 601.
.IP "\fB\-mppc, \-mppc32, \-m603, \-m604\fR" 4
.IX Item "-mppc, -mppc32, -m603, -m604"
Generate code for PowerPC 603/604.
.IP "\fB\-m403, \-m405\fR" 4
.IX Item "-m403, -m405"
Generate code for PowerPC 403/405.
.IP \fB\-m440\fR 4
.IX Item "-m440"
Generate code for PowerPC 440.  BookE and some 405 instructions.
.IP \fB\-m464\fR 4
.IX Item "-m464"
Generate code for PowerPC 464.
.IP \fB\-m476\fR 4
.IX Item "-m476"
Generate code for PowerPC 476.
.IP "\fB\-m7400, \-m7410, \-m7450, \-m7455\fR" 4
.IX Item "-m7400, -m7410, -m7450, -m7455"
Generate code for PowerPC 7400/7410/7450/7455.
.IP "\fB\-m750cl, \-mgekko, \-mbroadway\fR" 4
.IX Item "-m750cl, -mgekko, -mbroadway"
Generate code for PowerPC 750CL/Gekko/Broadway.
.IP "\fB\-m821, \-m850, \-m860\fR" 4
.IX Item "-m821, -m850, -m860"
Generate code for PowerPC 821/850/860.
.IP "\fB\-mppc64, \-m620\fR" 4
.IX Item "-mppc64, -m620"
Generate code for PowerPC 620/625/630.
.IP "\fB\-me200z2, \-me200z4\fR" 4
.IX Item "-me200z2, -me200z4"
Generate code for e200 variants, e200z2 with LSP, e200z4 with SPE.
.IP \fB\-me300\fR 4
.IX Item "-me300"
Generate code for PowerPC e300 family.
.IP "\fB\-me500, \-me500x2\fR" 4
.IX Item "-me500, -me500x2"
Generate code for Motorola e500 core complex.
.IP \fB\-me500mc\fR 4
.IX Item "-me500mc"
Generate code for Freescale e500mc core complex.
.IP \fB\-me500mc64\fR 4
.IX Item "-me500mc64"
Generate code for Freescale e500mc64 core complex.
.IP \fB\-me5500\fR 4
.IX Item "-me5500"
Generate code for Freescale e5500 core complex.
.IP \fB\-me6500\fR 4
.IX Item "-me6500"
Generate code for Freescale e6500 core complex.
.IP \fB\-mlsp\fR 4
.IX Item "-mlsp"
Enable LSP instructions.  (Disables SPE and SPE2.)
.IP \fB\-mspe\fR 4
.IX Item "-mspe"
Generate code for Motorola SPE instructions.  (Disables LSP.)
.IP \fB\-mspe2\fR 4
.IX Item "-mspe2"
Generate code for Freescale SPE2 instructions.  (Disables LSP.)
.IP \fB\-mtitan\fR 4
.IX Item "-mtitan"
Generate code for AppliedMicro Titan core complex.
.IP \fB\-mppc64bridge\fR 4
.IX Item "-mppc64bridge"
Generate code for PowerPC 64, including bridge insns.
.IP \fB\-mbooke\fR 4
.IX Item "-mbooke"
Generate code for 32\-bit BookE.
.IP \fB\-ma2\fR 4
.IX Item "-ma2"
Generate code for A2 architecture.
.IP \fB\-maltivec\fR 4
.IX Item "-maltivec"
Generate code for processors with AltiVec instructions.
.IP \fB\-mvle\fR 4
.IX Item "-mvle"
Generate code for Freescale PowerPC VLE instructions.
.IP \fB\-mvsx\fR 4
.IX Item "-mvsx"
Generate code for processors with Vector\-Scalar (VSX) instructions.
.IP \fB\-mhtm\fR 4
.IX Item "-mhtm"
Generate code for processors with Hardware Transactional Memory instructions.
.IP "\fB\-mpower4, \-mpwr4\fR" 4
.IX Item "-mpower4, -mpwr4"
Generate code for Power4 architecture.
.IP "\fB\-mpower5, \-mpwr5, \-mpwr5x\fR" 4
.IX Item "-mpower5, -mpwr5, -mpwr5x"
Generate code for Power5 architecture.
.IP "\fB\-mpower6, \-mpwr6\fR" 4
.IX Item "-mpower6, -mpwr6"
Generate code for Power6 architecture.
.IP "\fB\-mpower7, \-mpwr7\fR" 4
.IX Item "-mpower7, -mpwr7"
Generate code for Power7 architecture.
.IP "\fB\-mpower8, \-mpwr8\fR" 4
.IX Item "-mpower8, -mpwr8"
Generate code for Power8 architecture.
.IP "\fB\-mpower9, \-mpwr9\fR" 4
.IX Item "-mpower9, -mpwr9"
Generate code for Power9 architecture.
.IP "\fB\-mpower10, \-mpwr10\fR" 4
.IX Item "-mpower10, -mpwr10"
Generate code for Power10 architecture.
.IP "\fB\-mpower11, \-mpwr11\fR" 4
.IX Item "-mpower11, -mpwr11"
Generate code for Power11 architecture.
.IP \fB\-mfuture\fR 4
.IX Item "-mfuture"
Generate code for \*(Aqfuture\*(Aq architecture.
.IP \fB\-mcell\fR 4
.IX Item "-mcell"
.PD 0
.IP \fB\-mcell\fR 4
.IX Item "-mcell"
.PD
Generate code for Cell Broadband Engine architecture.
.IP \fB\-mcom\fR 4
.IX Item "-mcom"
Generate code Power/PowerPC common instructions.
.IP \fB\-many\fR 4
.IX Item "-many"
Generate code for any architecture (PWR/PWRX/PPC).
.IP \fB\-mregnames\fR 4
.IX Item "-mregnames"
Allow symbolic names for registers.
.IP \fB\-mno\-regnames\fR 4
.IX Item "-mno-regnames"
Do not allow symbolic names for registers.
.IP \fB\-mrelocatable\fR 4
.IX Item "-mrelocatable"
Support for GCC\*(Aqs \-mrelocatable option.
.IP \fB\-mrelocatable\-lib\fR 4
.IX Item "-mrelocatable-lib"
Support for GCC\*(Aqs \-mrelocatable\-lib option.
.IP \fB\-memb\fR 4
.IX Item "-memb"
Set PPC_EMB bit in ELF flags.
.IP "\fB\-mlittle, \-mlittle\-endian, \-le\fR" 4
.IX Item "-mlittle, -mlittle-endian, -le"
Generate code for a little endian machine.
.IP "\fB\-mbig, \-mbig\-endian, \-be\fR" 4
.IX Item "-mbig, -mbig-endian, -be"
Generate code for a big endian machine.
.IP \fB\-nops=\fR\fIcount\fR 4
.IX Item "-nops=count"
If an alignment directive inserts more than \fIcount\fR nops, put a
branch at the beginning to skip execution of the nops.
.PP
The following options are available when as is configured for a
RISC\-V processor.
.IP \fB\-fpic\fR 4
.IX Item "-fpic"
.PD 0
.IP \fB\-fPIC\fR 4
.IX Item "-fPIC"
.PD
Generate position\-independent code
.IP \fB\-fno\-pic\fR 4
.IX Item "-fno-pic"
Don\*(Aqt generate position\-independent code (default)
.IP \fB\-march=ISA|Profiles|Profiles_ISA\fR 4
.IX Item "-march=ISA|Profiles|Profiles_ISA"
Select the base isa, as specified by ISA or Profiles or Profies_ISA.
For example \fB\-march=rv32ima\fR \fB\-march=RVI20U64\fR
\&\fB\-march=RVI20U64_d\fR.
If this option and the architecture attributes aren\*(Aqt set, then assembler
will check the default configure setting \-\-with\-arch=ISA.
.IP \fB\-misa\-spec=ISAspec\fR 4
.IX Item "-misa-spec=ISAspec"
Select the default isa spec version.  If the version of ISA isn\*(Aqt set
by \-march, then assembler helps to set the version according to
the default chosen spec.  If this option isn\*(Aqt set, then assembler will
check the default configure setting \-\-with\-isa\-spec=ISAspec.
.IP \fB\-mpriv\-spec=PRIVspec\fR 4
.IX Item "-mpriv-spec=PRIVspec"
Select the privileged spec version.  We can decide whether the CSR is valid or
not according to the chosen spec.  If this option and the privilege attributes
aren\*(Aqt set, then assembler will check the default configure setting
\&\-\-with\-priv\-spec=PRIVspec.
.IP \fB\-mabi=ABI\fR 4
.IX Item "-mabi=ABI"
Selects the ABI, which is either "ilp32" or "lp64", optionally followed
by "f", "d", or "q" to indicate single\-precision, double\-precision, or
quad\-precision floating\-point calling convention, or none or "e" to indicate
the soft\-float calling convention ("e" indicates a soft\-float RVE ABI).
.IP \fB\-mrelax\fR 4
.IX Item "-mrelax"
Take advantage of linker relaxations to reduce the number of instructions
required to materialize symbol addresses. (default)
.IP \fB\-mno\-relax\fR 4
.IX Item "-mno-relax"
Don\*(Aqt do linker relaxations.
.IP \fB\-march\-attr\fR 4
.IX Item "-march-attr"
Generate the default contents for the riscv elf attribute section if the
\&.attribute directives are not set.  This section is used to record the
information that a linker or runtime loader needs to check compatibility.
This information includes ISA string, stack alignment requirement, unaligned
memory accesses, and the major, minor and revision version of privileged
specification.
.IP \fB\-mno\-arch\-attr\fR 4
.IX Item "-mno-arch-attr"
Don\*(Aqt generate the default riscv elf attribute section if the .attribute
directives are not set.
.IP \fB\-mcsr\-check\fR 4
.IX Item "-mcsr-check"
Enable the CSR checking for the ISA\-dependent CRS and the read\-only CSR.
The ISA\-dependent CSR are only valid when the specific ISA is set.  The
read\-only CSR can not be written by the CSR instructions.
.IP \fB\-mno\-csr\-check\fR 4
.IX Item "-mno-csr-check"
Don\*(Aqt do CSR checking.
.IP \fB\-mlittle\-endian\fR 4
.IX Item "-mlittle-endian"
Generate code for a little endian machine.
.IP \fB\-mbig\-endian\fR 4
.IX Item "-mbig-endian"
Generate code for a big endian machine.
.PP
See the info pages for documentation of the RX\-specific options.
.PP
The following options are available when as is configured for the s390
processor family.
.IP \fB\-m31\fR 4
.IX Item "-m31"
.PD 0
.IP \fB\-m64\fR 4
.IX Item "-m64"
.PD
Select the word size, either 31/32 bits or 64 bits.
.IP \fB\-mesa\fR 4
.IX Item "-mesa"
.PD 0
.IP \fB\-mzarch\fR 4
.IX Item "-mzarch"
.PD
Select the architecture mode, either the Enterprise System
Architecture (esa) or the z/Architecture mode (zarch).
.IP \fB\-march=\fR\fIprocessor\fR 4
.IX Item "-march=processor"
Specify which s390 processor variant is the target, \fBg5\fR (or
\&\fBarch3\fR), \fBg6\fR, \fBz900\fR (or \fBarch5\fR), \fBz990\fR (or
\&\fBarch6\fR), \fBz9\-109\fR, \fBz9\-ec\fR (or \fBarch7\fR), \fBz10\fR (or
\&\fBarch8\fR), \fBz196\fR (or \fBarch9\fR), \fBzEC12\fR (or \fBarch10\fR),
\&\fBz13\fR (or \fBarch11\fR), \fBz14\fR (or \fBarch12\fR), \fBz15\fR
(or \fBarch13\fR), \fBz16\fR (or \fBarch14\fR), or \fBz17\fR (or
\&\fBarch15\fR).
.IP \fB\-mregnames\fR 4
.IX Item "-mregnames"
.PD 0
.IP \fB\-mno\-regnames\fR 4
.IX Item "-mno-regnames"
.PD
Allow or disallow symbolic names for registers.
.IP \fB\-mwarn\-areg\-zero\fR 4
.IX Item "-mwarn-areg-zero"
Warn whenever the operand for a base or index register has been specified
but evaluates to zero.
.IP \fB\-mwarn\-regtype\-mismatch=strict\fR 4
.IX Item "-mwarn-regtype-mismatch=strict"
.PD 0
.IP \fB\-mwarn\-regtype\-mismatch=relaxed\fR 4
.IX Item "-mwarn-regtype-mismatch=relaxed"
.IP \fB\-mwarn\-regtype\-mismatch=no\fR 4
.IX Item "-mwarn-regtype-mismatch=no"
.IP \fB\-mno\-warn\-regtype\-mismatch\fR 4
.IX Item "-mno-warn-regtype-mismatch"
.PD
Controls whether the assembler performs register name type checks and generates
a warning message in case of a mismatch with the operand register type.
The default (which can be restored by using the \fBrelaxed\fR argument) is
to perform relaxed register name type checks, which allow floating point
register (FPR) names \f(CW%f0\fR to \f(CW%f15\fR to be specified as argument to vector register
(VR) operands and vector register (VR) names \f(CW%v0\fR to \f(CW%v15\fR to be specified as
argument to floating point register (FPR) operands.  This is acceptable as the
FPR are embedded into the lower half of the VR.
Using the \fBstrict\fR argument strict register name type checks are
performed.
The \fBno\fR argument, which is equivalent to
\&\fB\-mno\-warn\-regtype\-mismatch\fR, disables any register name type checks.
.PP
The following options are available when as is configured for a
TMS320C6000 processor.
.IP \fB\-march=\fR\fIarch\fR 4
.IX Item "-march=arch"
Enable (only) instructions from architecture \fIarch\fR.  By default,
all instructions are permitted.
.Sp
The following values of \fIarch\fR are accepted: \f(CW\*(C`c62x\*(C'\fR,
\&\f(CW\*(C`c64x\*(C'\fR, \f(CW\*(C`c64x+\*(C'\fR, \f(CW\*(C`c67x\*(C'\fR, \f(CW\*(C`c67x+\*(C'\fR, \f(CW\*(C`c674x\*(C'\fR.
.IP \fB\-mdsbt\fR 4
.IX Item "-mdsbt"
.PD 0
.IP \fB\-mno\-dsbt\fR 4
.IX Item "-mno-dsbt"
.PD
The \fB\-mdsbt\fR option causes the assembler to generate the
\&\f(CW\*(C`Tag_ABI_DSBT\*(C'\fR attribute with a value of 1, indicating that the
code is using DSBT addressing.  The \fB\-mno\-dsbt\fR option, the
default, causes the tag to have a value of 0, indicating that the code
does not use DSBT addressing.  The linker will emit a warning if
objects of different type (DSBT and non\-DSBT) are linked together.
.IP \fB\-mpid=no\fR 4
.IX Item "-mpid=no"
.PD 0
.IP \fB\-mpid=near\fR 4
.IX Item "-mpid=near"
.IP \fB\-mpid=far\fR 4
.IX Item "-mpid=far"
.PD
The \fB\-mpid=\fR option causes the assembler to generate the
\&\f(CW\*(C`Tag_ABI_PID\*(C'\fR attribute with a value indicating the form of data
addressing used by the code.  \fB\-mpid=no\fR, the default,
indicates position\-dependent data addressing, \fB\-mpid=near\fR
indicates position\-independent addressing with GOT accesses using near
DP addressing, and \fB\-mpid=far\fR indicates position\-independent
addressing with GOT accesses using far DP addressing.  The linker will
emit a warning if objects built with different settings of this option
are linked together.
.IP \fB\-mpic\fR 4
.IX Item "-mpic"
.PD 0
.IP \fB\-mno\-pic\fR 4
.IX Item "-mno-pic"
.PD
The \fB\-mpic\fR option causes the assembler to generate the
\&\f(CW\*(C`Tag_ABI_PIC\*(C'\fR attribute with a value of 1, indicating that the
code is using position\-independent code addressing,  The
\&\f(CW\*(C`\-mno\-pic\*(C'\fR option, the default, causes the tag to have a value of
0, indicating position\-dependent code addressing.  The linker will
emit a warning if objects of different type (position\-dependent and
position\-independent) are linked together.
.IP \fB\-mbig\-endian\fR 4
.IX Item "-mbig-endian"
.PD 0
.IP \fB\-mlittle\-endian\fR 4
.IX Item "-mlittle-endian"
.PD
Generate code for the specified endianness.  The default is
little\-endian.
.PP
The following options are available when as is configured for a TILE\-Gx
processor.
.IP "\fB\-m32 | \-m64\fR" 4
.IX Item "-m32 | -m64"
Select the word size, either 32 bits or 64 bits.
.IP "\fB\-EB | \-EL\fR" 4
.IX Item "-EB | -EL"
Select the endianness, either big\-endian (\-EB) or little\-endian (\-EL).
.PP
The following option is available when as is configured for a Visium
processor.
.IP \fB\-mtune=\fR\fIarch\fR 4
.IX Item "-mtune=arch"
This option specifies the target architecture.  If an attempt is made to
assemble an instruction that will not execute on the target architecture,
the assembler will issue an error message.
.Sp
The following names are recognized:
\&\f(CW\*(C`mcm24\*(C'\fR
\&\f(CW\*(C`mcm\*(C'\fR
\&\f(CW\*(C`gr5\*(C'\fR
\&\f(CW\*(C`gr6\*(C'\fR
.PP
The following options are available when as is configured for an
Xtensa processor.
.IP "\fB\-\-text\-section\-literals | \-\-no\-text\-section\-literals\fR" 4
.IX Item "--text-section-literals | --no-text-section-literals"
Control the treatment of literal pools.  The default is
\&\fB\-\-no\-text\-section\-literals\fR, which places literals in
separate sections in the output file.  This allows the literal pool to be
placed in a data RAM/ROM.  With \fB\-\-text\-section\-literals\fR, the
literals are interspersed in the text section in order to keep them as
close as possible to their references.  This may be necessary for large
assembly files, where the literals would otherwise be out of range of the
\&\f(CW\*(C`L32R\*(C'\fR instructions in the text section.  Literals are grouped into
pools following \f(CW\*(C`.literal_position\*(C'\fR directives or preceding
\&\f(CW\*(C`ENTRY\*(C'\fR instructions.  These options only affect literals referenced
via PC\-relative \f(CW\*(C`L32R\*(C'\fR instructions; literals for absolute mode
\&\f(CW\*(C`L32R\*(C'\fR instructions are handled separately.
.IP "\fB\-\-auto\-litpools | \-\-no\-auto\-litpools\fR" 4
.IX Item "--auto-litpools | --no-auto-litpools"
Control the treatment of literal pools.  The default is
\&\fB\-\-no\-auto\-litpools\fR, which in the absence of
\&\fB\-\-text\-section\-literals\fR places literals in separate sections
in the output file.  This allows the literal pool to be placed in a data
RAM/ROM.  With \fB\-\-auto\-litpools\fR, the literals are interspersed
in the text section in order to keep them as close as possible to their
references, explicit \f(CW\*(C`.literal_position\*(C'\fR directives are not
required.  This may be necessary for very large functions, where single
literal pool at the beginning of the function may not be reachable by
\&\f(CW\*(C`L32R\*(C'\fR instructions at the end.  These options only affect
literals referenced via PC\-relative \f(CW\*(C`L32R\*(C'\fR instructions; literals
for absolute mode \f(CW\*(C`L32R\*(C'\fR instructions are handled separately.
When used together with \fB\-\-text\-section\-literals\fR,
\&\fB\-\-auto\-litpools\fR takes precedence.
.IP "\fB\-\-absolute\-literals | \-\-no\-absolute\-literals\fR" 4
.IX Item "--absolute-literals | --no-absolute-literals"
Indicate to the assembler whether \f(CW\*(C`L32R\*(C'\fR instructions use absolute
or PC\-relative addressing.  If the processor includes the absolute
addressing option, the default is to use absolute \f(CW\*(C`L32R\*(C'\fR
relocations.  Otherwise, only the PC\-relative \f(CW\*(C`L32R\*(C'\fR relocations
can be used.
.IP "\fB\-\-target\-align | \-\-no\-target\-align\fR" 4
.IX Item "--target-align | --no-target-align"
Enable or disable automatic alignment to reduce branch penalties at some
expense in code size.    This optimization is enabled by default.  Note
that the assembler will always align instructions like \f(CW\*(C`LOOP\*(C'\fR that
have fixed alignment requirements.
.IP "\fB\-\-longcalls | \-\-no\-longcalls\fR" 4
.IX Item "--longcalls | --no-longcalls"
Enable or disable transformation of call instructions to allow calls
across a greater range of addresses.    This option should be used when call
targets can potentially be out of range.  It may degrade both code size
and performance, but the linker can generally optimize away the
unnecessary overhead when a call ends up within range.  The default is
\&\fB\-\-no\-longcalls\fR.
.IP "\fB\-\-transform | \-\-no\-transform\fR" 4
.IX Item "--transform | --no-transform"
Enable or disable all assembler transformations of Xtensa instructions,
including both relaxation and optimization.  The default is
\&\fB\-\-transform\fR; \fB\-\-no\-transform\fR should only be used in the
rare cases when the instructions must be exactly as specified in the
assembly source.  Using \fB\-\-no\-transform\fR causes out of range
instruction operands to be errors.
.IP "\fB\-\-rename\-section\fR \fIoldname\fR\fB=\fR\fInewname\fR" 4
.IX Item "--rename-section oldname=newname"
Rename the \fIoldname\fR section to \fInewname\fR.  This option can be used
multiple times to rename multiple sections.
.IP "\fB\-\-trampolines | \-\-no\-trampolines\fR" 4
.IX Item "--trampolines | --no-trampolines"
Enable or disable transformation of jump instructions to allow jumps
across a greater range of addresses.    This option should be used when jump targets can
potentially be out of range.  In the absence of such jumps this option
does not affect code size or performance.  The default is
\&\fB\-\-trampolines\fR.
.IP "\fB\-\-abi\-windowed | \-\-abi\-call0\fR" 4
.IX Item "--abi-windowed | --abi-call0"
Choose ABI tag written to the \f(CW\*(C`.xtensa.info\*(C'\fR section.  ABI tag
indicates ABI of the assembly code.  A warning is issued by the linker
on an attempt to link object files with inconsistent ABI tags.
Default ABI is chosen by the Xtensa core configuration.
.PP
The following options are available when as is configured for an
Z80 processor.
.PP
\&\f(CW@chapter\fR Z80 Dependent Features
.SS "Command\-line Options"
.IX Subsection "Command-line Options"
.IP \fB\-march=\fR\fICPU\fR\fB[\-\fR\fIEXT\fR\fB...][+\fR\fIEXT\fR\fB...]\fR 4
.IX Item "-march=CPU[-EXT...][+EXT...]"
This option specifies the target processor. The assembler will issue
an error message if an attempt is made to assemble an instruction which
will not execute on the target processor. The following processor names
are recognized:
\&\f(CW\*(C`z80\*(C'\fR,
\&\f(CW\*(C`z180\*(C'\fR,
\&\f(CW\*(C`ez80\*(C'\fR,
\&\f(CW\*(C`gbz80\*(C'\fR,
\&\f(CW\*(C`z80n\*(C'\fR,
\&\f(CW\*(C`r800\*(C'\fR.
In addition to the basic instruction set, the assembler can be told to
accept some extension mnemonics. For example,
\&\f(CW\*(C`\-march=z180+sli+infc\*(C'\fR extends \fIz180\fR with \fISLI\fR instructions and
\&\fIIN F,(C)\fR. The following extensions are currently supported:
\&\f(CW\*(C`full\*(C'\fR (all known instructions),
\&\f(CW\*(C`adl\*(C'\fR (ADL CPU mode by default, eZ80 only),
\&\f(CW\*(C`sli\*(C'\fR (instruction known as \fISLI\fR, \fISLL\fR or \fISL1\fR),
\&\f(CW\*(C`xyhl\*(C'\fR (instructions with halves of index registers: \fIIXL\fR, \fIIXH\fR,
\&\fIIYL\fR, \fIIYH\fR),
\&\f(CW\*(C`xdcb\*(C'\fR (instructions like \fIRotOp (II+d),R\fR and \fIBitOp n,(II+d),R\fR),
\&\f(CW\*(C`infc\*(C'\fR (instruction \fIIN F,(C)\fR or \fIIN (C)\fR),
\&\f(CW\*(C`outc0\*(C'\fR (instruction \fIOUT (C),0\fR).
Note that rather than extending a basic instruction set, the extension
mnemonics starting with \f(CW\*(C`\-\*(C'\fR revoke the respective functionality:
\&\f(CW\*(C`\-march=z80\-full+xyhl\*(C'\fR first removes all default extensions and adds
support for index registers halves only.
.Sp
If this option is not specified then \f(CW\*(C`\-march=z80+xyhl+infc\*(C'\fR is assumed.
.IP \fB\-local\-prefix=\fR\fIprefix\fR 4
.IX Item "-local-prefix=prefix"
Mark all labels with specified prefix as local. But such label can be
marked global explicitly in the code. This option do not change default
local label prefix \f(CW\*(C`.L\*(C'\fR, it is just adds new one.
.IP \fB\-colonless\fR 4
.IX Item "-colonless"
Accept colonless labels. All symbols at line begin are treated as labels.
.IP \fB\-sdcc\fR 4
.IX Item "-sdcc"
Accept assembler code produced by SDCC.
.IP \fB\-fp\-s=\fR\fIFORMAT\fR 4
.IX Item "-fp-s=FORMAT"
Single precision floating point numbers format. Default: ieee754 (32 bit).
.IP \fB\-fp\-d=\fR\fIFORMAT\fR 4
.IX Item "-fp-d=FORMAT"
Double precision floating point numbers format. Default: ieee754 (64 bit).
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBgcc\fR\|(1), \fBld\fR\|(1), and the Info entries for \fIbinutils\fR and \fIld\fR.
.SH COPYRIGHT
.IX Header "COPYRIGHT"
Copyright (c) 1991\-2026 Free Software Foundation, Inc.
.PP
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, with no Front\-Cover Texts, and with no
Back\-Cover Texts.  A copy of the license is included in the
section entitled "GNU Free Documentation License".