File: ChangeLog

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spim 8.0+dfsg-6.1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, buster, sid, stretch
  • size: 1,704 kB
  • ctags: 2,427
  • sloc: asm: 8,560; ansic: 8,436; yacc: 2,298; makefile: 1,114; lex: 706; sh: 219
file content (2485 lines) | stat: -rw-r--r-- 70,385 bytes parent folder | download | duplicates (4)
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2010-01-08    <Jim@LS-RED>

	* Version 8.0 released

2010-01-05    <Jim@LS-RED>

	* xspim/Imakefile, spim/Makefile Jaymie Strecker [JStrecker@wooster.edu]:
	Change install path from /usr to /usr/local.
	Removed -D option, which doesn't exists on MacOS.

	* pervasive:
	Change license to a BSD license, update copyright notices, and
	eliminated references to my old email address.

2009-12-05    <Jim@LS1>

	* CPU/spim-utils.c (initialize_run_stack) [이법재 bupjae@hotmail.com]:
	Simplify alignment of data on stack to ensure enough room is left
	for environment and args at top of stack.

	* PCSpim/PCSpimView.cpp:
	Initialize stack with arguments when running program from run dialog.

	* spim/spim.c (read_input) [Adam Wolfe Gordon
	adam.wolfegordon@gmail.com}:
	read_input filled buffer with last character of file not terminated by
	newline.

	* Documentation/spim.html [Dave Comer dmcomer@dmcmicro.com]:
	Links to MIPS documentation were broken.

2009-09-22    <Jim@LS1>

	* spim/spim.c (main) [Ohad Kammar ohad.kammar@ed.ac.uk]:
	Did not return value from exit syscall.

2009-03-01  James larus  <larus@ubuntu-laptop>

	* xspim/buttons.c [Karl Ljungkvist k.ljungkvist@gmail.com]:
	Step command reinitialized the stack, which changed registers (argc, argv).

2009-03-01    <Jim@LS1>

	* Documentation/spim.html:
	Updated web page to remove reference to spim source in PCSpim source distribution.

	* PCSpim/PCSpimView.{cpp, h}, SettingsDlg.cpp, BreakpointDlg.cpp, MainFrm.{cpp, h}:
	Force redisplay of data segment in situations in which register
	values may have changed, such as $sp. Some cleanup as well.

	* PCSpim/PCSpimView.cpp:
	Properly initialize the PC at the first invocation of the step operation.

	* PCSpim/PCSpimView.cpp, spim/spim.c [Pierce, Bill [pierce@hood.edu]:
	Initialize the stack when initializing the world, so the stack is
	initialized when single stepping as well as running.

2009-02-13    <Jim@LS1>

	* CPU/mem.c (bad_mem_write) [phong le phongle@nlsim.com]:
	Major memory leak: instructions overwritten by self-modifying code
	were not freed!

	* spim/Configure, xspim/Configure [Carlos Pantelides carlos_pantelides@yahoo.com]:
	Added test for 64 bit Linux systems.

2009-01-22    <Jim@LS1>

	* spim/Makefile:
	Fix install commands so exceptions.s is installed at /usr/lib/spim.
	Rerelease of spim.tar.*

2009-01-14    <Jim@LS1>

	* pcspim.zip:
	Rerelease of pcspim to correct installer problem. Visual Studio
	9.0 required new crt and mfc libraries.

2009-01-01    <Jim@LS1>

	* Released version 7.4

2009-01-01  James larus  <larus@ubuntu-laptop>

	* xspim/Imakefile, spim/Makefile:
	Fix install directories for Linux.

2008-11-29    <Jim@LS1>

	* xspim/buttons.c [karl.marklund@gmail.com]:
	Command line arguments for assembly code not properly set.

2008-11-28    <Jim@LS1>

	* PCSpim/PCSpimView.{cpp,h}:
	Command line arguments not set properly on second and subsequent runs.

2008-11-01    <Jim@LS1>

	* Version 7.4

	* Tests/tt.core.s (madd_) Miguel Barão [mjsb@di.uevora.pt]:
	Added test for madd(2, -1) with (hi, lo) = (0, -1).

2008-05-18    <Jim@LS1>

	* CPU/scanner.l [liblit@cs.wisc.edu]:
	Fix for flex 2.5.33 was too specific for that version and failed
	on later versions, which propagated the change recoganized by fix
	of2005-02-05.

2007-05-20    <Jim@LS1>

	* CPU/run.c (run_spim):
	Fixed handling of borrow from subtract of low-order word in MSUB
	and MSUBU

2007-05-03    <Jim@LS1>

	* CPU/run.c Tim ODonnell [timodonnell@gmail.com]:
	Fixed handling of overflow from add of low-order word in MADD and
	MADDU.

2007-04-15    <Jim@LS1>

	* Documentation/spim.html:
	Updated MIPS documenation links to reflect new file
	versions. Included link to Nokia 660 port.

2007-01-14    <Jim@LS1>

	* CPU/inst.c (inst_decode) Cai Hongxu [caihongxu@gmail.com]:
	Did not correctly decode SPECIAL2 instructions (e.g., madd).

2006-08-28    <Jim@LS1>

	* spim/Makefile:
	Explicitly include exception handler path for "make test" to
	eliminate need to install it before running test.

2006-08-26    <Jim@LS1>

	* Version 7.3

	* spim/Makefile, xspim/Imakefile:
	Fix installation process of man pages and make xspim compile under
	Cygwin. Do not install man page by default (too many different
	options).

2006-08-23    <Jim@LS1>

	* CPU/string-stream.c [Jeremy Huddleston
	jeremyhu@eecs.berkeley.edu]:
	Segfault in ss_printf caused by incorrect usage of va_ interface
	when string overflows and needs to be reallocated.

	* xspim/xspim.c, spim/spim.c [Jeremy Huddleston
	jeremyhu@eecs.berkeley.edu]:
	Read SPIM_EXCEPTION_HANDLER environment variable.

2006-08-20    <Jim@LS1>

	* CPU/scanner.l [many xspim bugs on Linux]:
	flex 2.5.33 changed the polarity of the yy_init flag without
	providing a backwardly compatible way of setting it (sigh).

	* spim-utils.c [Jeremy Huddleston jeremyhu@berkeley.edu]:
	Allow a semicolon deliminated list of exception files, rather than
	just a single file.

	* parser.y [Piotr Bieganowski bieganow@wsisiz.edu.pl]:
	Memory corruption caused spim to crash when a label was defined
	twice in succession.

2006-08-19    <Jim@LS1>

	* PCSPimView.cpp:
	Update register and memory display even after a parse error when
	reading a file.

	* parser.y, scanner.{h, l} [Jordi Ferrer Plana jferrerp@eia.udg.es]:
	Added unnecessary null character between items in a list of
	strings from .asciiz.

2005-11-25    <Jim@LS1>

	* xspim/Imakefile, spim/Makefile [Johannes Grassler
	johannes.grassler@freenet.de]:
	Fix paths for installing exception.s.

2005-08-28    <Jim@LS1>

	* Documentation/TeX/spim.tex:
	Change psfig -> epsfig.

	* SPIM 7.2.1 Released

	* spim.c:
	Translate CR -> NL on console input and echo CR following NL on
	console output (to make IO consistent across all three platforms).

	* spim.c:
	Did not properly set console flags when passing console to program.

	* xspim.c:
	Fixed handling of carriage return and modifier keys in xspim
	memory mapped IO.

	* xspim.c:
	Do not ignore trailing filename argument to xspim.

	* {spim,xspim}/Configure:
	Use the "env" command to invoke bash, so pathname is not hardwired
	into shell script (eg for Solaris).

2005-08-07    <Jim@LS1>

	* SPIM 7.2 Released

	* README spim/Makfile
	General cleanup of documentation in README files.
	Eliminated Makefile.Cygwin in spim directory in favor of single
	file that worked on Unix and Cygwin.

2005-07-25    <Jim@LS1>

	* CPU/sym-tbl.c (resolve_a_label_sub) [Vegdahl, Steven vegdahl@up.edu]:
	Did not add 1 to upper 16 bits of LW/SW pair (to compensate for
	signed add in instruction) when there was an ADDU instruction
	between the LUI and LW/SW, due to an indexed address compuation.

2005-06-04    <Jim@LS1>

	* spim/spim.c (console_to_program) [Peter Fröhlich phf@cs.ucr.edu]:
	Eliminated non-POSIX flags IUCLC and IXANY to facilitate port to
	Mac OS X.

	* spim/spim.c (console_to_program) [Deborah Pickett
	debbiep@csse.monash.edu.au]:
	Use termios(3) library calls instead of IOCTLs to fix bug
	introduced in port from termio to termios struct (did not change
	TCGETA -> TCGETS and TCSETA -> TCSETS, since the latter does not
	exist in Cygwin).

	* Tests/tt.core.s (jalr_):
	Test default case for jalr, without default $rd (=31).

	* Tests/tt.io.s blair bethwaite [blair.bethwaite@gmail.com]:
	Trap handle in test extracted wrong bits from ExcCode field of
	Cause register.

2005-05-31    <Jim@LS1>

	* Pervasive restructuring of files to put 3 UIs (spim, xspim,
	PCSpim) in separate directories and cleanup organization and
	makefiles.

2005-02-12    <Jim@LS1>

	* PCSpim:
	Use correct help file in install process.

2005-02-05    <Jim@LS1>

	* scanner.l [Joe Pfeiffer pfeiffer@cs.nmsu.edu]:
	Added work-around for bug in 2.5.31 that left yytext_ptr undefined.

	* exceptions.s [Herman Harrison herman.harrison@utdallas.edu]:
	Restore epilogue code restored $at then used pseduo instructions
	that smashed it.

	* PCSpimView.{cpp,h}
	Cleared filename when reinitializing simulator, which broke next
	reload command.

2005-01-10    <Jim@LS1>

	* Repackage and rerelease PCSpim_7.1.zip to include mfc71.dll and
	msvc71.dll, which weren't originally included.

2005-01-02    <Jim@LS1>

	* Version 7.1 released.

	* Switched Windows installer to Microsoft .msi installer, instead
	of InstallShield.

	* exceptions.s [Pervin, William J pervin@utdallas.edu]:
	Masked exception code with 4 bit (not 5 bit) mask.

2004-11-27    <Jim@LS1>

	* mem.c inst.h (check_memory_mapped_IO) [Deborah debbiep@csse.monash.edu.au]:
	Clearing the transmitter or receiver interrupt enable bits also
	clear interrupt pending bits in Cause register. Transmitter and
	receiver interrupt enable bits now operate properly (ie prevent
	interrupts when cleared).

2004-11-26    <Jim@LS1>

	* xspim.c (console_input_available) [Daniel Stearns dstearns@csc.calpoly.edu]:
	Code to poll for a console input character in X windows blocked and
	prevented any output until input occured.

2004-11-23    <Jim@LS1>

	* exceptions.s (__excp) [pwhite@mailhaven.com]:
	Correct typos in comments

2004-11-13    <Jim@LS1>

	* op.h [lau@det.ua.pt]:
	Type of "mul" instruction was wrong, which lead to it being
	printed without destination register.

2004-10-19    <Jim@LS1>

	* inst.c (inst_decode):
	Do not printf with format string from user input (comment).

2004-10-18    <Jim@LS1>

	* inst.c (format_an_inst):
	Do not print breakpoint instruction. Instead, print underlying instruction.

	* PCSpimView.cpp:
	Do not single step when PC = 0;

	* spim-utils.c, spim.c:
	Clean up stack initialization code.

	* spim-utils.c:
	Change R[29] -> R[REG_SP].

2004-09-28    <Jim@LS1>

	* op.h:
	Table had same opcode for beq and beql, which caused unparing
	error that unparsed beq as beql.

2004-09-26    <Jim@LS1>

	* spim.c, Configure:
	Eliminated dependence on obsolete termio.h in favor of posix
	termios.h since Mac OS X doesn't have termio.h any more.

2004-09-21    <Jim@LS1>

	* PCSpimView.cpp:
	Fix null pointer problem if no entries in registry.

	* spim-utils.c [J.P. Mellor [jpmellor@rose-hulman.edu]]:
	Turn off EXL bit after break instruction, since break is handled by
	SPIM, not MIPS, code and the bit was never getting cleared.

	* Move to VC7.0 (Visual Studio.NET).

2004-09-12    <larus@HomeMachine>

	* Released SPIM 7.0b (on Windows) to propagate changes.

	* PCSpimView.cpp:
	Set default path for exceptions.s to C:\Program Files\PCSpim, the
	default installation directory.

2004-09-04    <larus@HomeMachine>

	* Tests/tt.core.s:
	Test for SQRT.S used double constant, which failed on SPARC (but
	not x86).

2004-08-22    <larus@HomeMachine>

	* Released SPIM 7.0a to propagate changes.

	* Updated spim.html with new COD files.

	* Makefile, Imakefile, Makefile.std:
	Eliminate dependence in syscall.o on spim-syscall.h.

2004-07-11    <larus@HomeMachine>

	* Makefile [Michael L. Miller [mmiller2@terpalum.umd.edu]]:
	Regenerated with updated Imakefile, to reflect file name changes.

2004-07-07    <larus@HomeMachine>

	* Released SPIM 7.0

	* string-stream.c:
	Fix off-by-one errors null terminating strings.

	* data.c (lcomm_directive) Philipp Lucas [phlucas@cs.uni-sb.de]:
	Fix implementation of .lcomm

2004-06-27    <larus@HomeMachine>

	* parser.y [Philipp Lucas [phlucas@cs.uni-sb.de]]:
	Freed wrong YACC variable in .comm and .label.

2004-06-05    <larus@HomeMachine>

	* PCSpim:
	Add Solution for building PCSpim with VC7 (PCSpim.VC7).

	* op.h [Dave]:
	Modified some FP opcodes to correct values.

2004-05-08    <larus@HomeMachine>

	* spim.c, xspim.c:
	Removed unused variable cycle_level.

2004-05-02    <larus@HomeMachine>

	* MainFrame.{cpp,h}, PCSpimView.{cpp,h}:
	Fixed updating of status line in PCSpim to conform to MFC convention

2004-04-24    <larus@HomeMachine>

	* parser.y run.c op.h:
	Changed MUL instruction from pseduo op to actual instruction.
	Fixed encoding of several instructions to correspond to hardware.

2004-03-28    <larus@HomeMachine>

	* run.c:
	Changed CP0 timer to poll on Unix, since signals interrupt system
	calls and affect SPIM's I/O.

2004-03-25    <larus@HomeMachine>

	* display-utils.c, xspim.c windows.c:
	Made X interfaces a bit more compact and regular. Works on a
	1024x768 screen.

2004-03-22    <larus@HomeMachine>

	* parser.y [Margaret M Reek [mmr@cs.rit.edu]]:
	Add, rather than subtract, in expression: imm - imm.

2004-03-21    <larus@HomeMachine>

	* pervasive:
	Cleaned up splint warnings.
	Replaced sprintf calls with str-stream abstraction.

2004-03-12    <larus@HomeMachine>

	* pervasive:
	Renamed "trap" to "exception" to reflect MIPS terminology.
	Renamed trap.handler to exceptions.s.

	* inst.c inst.h parser.y run.c:
	Fix internal representation of instructions by separating FS from
	RS field and moving it RD and RD to SHAMT.

	* scanner.l [Akim Demaille <akim@epita.fr>]:
	Improve handling of escape sequence in strings to bring it close
	to ISO C strings.

	* spim.c:
	Introduced short command line arguments.
	Assumed first argument not starting with '-' is file name.

	* inst.h mem.c mem.h reg.h run.c spim-utils.c spim.c spim.h
	tt.io.s:
	Fixed implementation of console IO.
	Ensure that interrupts occur before instruction execution (and
	other exceptions afterwards), so that EPC points to instruciton to
	restart.

2004-03-11    <larus@HomeMachine>

	* mips-syscall.{c,h} spim-sycall.h syscall.{c,h}
	Moved all syscall-related stuff to syscall.{c,h} and eliminated
	old #ifdef'ed stuff related to syscalls from binary code running
	on DECstations.

2004-03-10    <larus@HomeMachine>

	* Changed memory access macros to functions.

2004-03-06    <larus@HomeMachine>

	* prevasive:
	Implemented MIPS32 instruction set.
	Eliminated coprocessor 3.
	Made coprocessor 2 operations raise coprocessor unimplemented trap
	(CpU).
	Modified exceptions and interrupts to conform to MIPS32 (ex when
	compiled -DMIPS1).
	Added CP0 timer.
	Fixed trap.handler to work with MIPS32 exceptions.

2004-02-19    <larus@HomeMachine>

	* inst.c inst.h spim-utils.c:
	Sorted instruction tables in advance, rather than on first use.

2004-02-16    <larus@HomeMachine>

	* PCSpimView.cpp [Domenico G. Sorrenti (sorrenti@disco.unimib.it)]:
	Add prompt to ask user whether to reinitialize on reloading a file.

2004-02-15    <larus@HomeMachine>

	* MainFrm.cpp MainFrm.h PCSpim.cpp PCSpimView.cpp PCSpimView.h
	[Matthew Low (mlow@imail.EECS.Berkeley.edu)]:
	Added menu item to set font in PCSpim.

	* Documentation/spim.tex [Deborah Ariel Pickett
	(debbiep@mail.csse.monash.edu.au)]:
	Updated documentation to reflect changes to command line options
	and new syscalls.

	* pervasive:
	Eliminated #ifdef __STDC__. Everyone must have a non-K&R compiler
	by now.

	* mem.c [Akim Demaille (akim@epita.fr)]:
	Word align all segments, in particular, ensure that sbrk returns
	word-aligned addresses.

	* mips-syscall.c spim-syscall.h spim.c xspim.c spim.h
	SpimSupport.cpp [Akim Demaille (akim@epita.fr)]:
	Added new syscall (EXIT2_SYSCALL) that takes argument that is
	passed to spim's exit() call.

	* sym-tbl.c [Matt Harren (math@cs.berkeley.edu)]:
	Copied garbage byte after name of undefined symbols.

	* scanner.l [Vishal jain (vishalsj@yahoo.com)]:
	Old lex does not use yy_hold_char variable, so ifdef out reference.

	* spim.c [Matt Harren (math@cs.berkeley.edu)]:
	Handle boundary case for -file without name.

2004-02-14    <larus@HomeMachine>

	* run.c [Bob Britton (BBritton@csuchico.edu)]:
	Correctly implement delayed load instructions. (Nobody ever use
	them before?)

	* parser.y:
	Record labels on line with syntax error.

	* scanner.l [P. Augustyniak silvathraec@rpg.pl]:
	Added \ooo constants to strings.

	* mips-syscall.c [Shaunak Pawagi (shaunak@cs.sunysb.edu)]:
	Only print 8 digits for single precision floats.

	* spim.html [Shaunak Pawagi (shaunak@cs.sunysb.edu)]:
	Correct -delayed-branches and -delayed-loads to -delayed_branches
	and -delayed_loads.

	* spim.c [Jos Hulzink (josh@stack.nl)]:
	Incorrect ifdef around vprintf.

	* spim.c [Marvin Solomon (solomon@cs.wisc.edu)]:
	Core dumped when passed one argument.

	* run.c tt.core.s [Marvin Solomon (solomon@cs.wisc.edu)]:
	Change to test for overflow in integer divide was backwards and
	nullified all divides by -1.

	* Configure [Russell D. Meier (meier@msoe.edu)]:
	Removed the -traditional-cpp flag from MacOSX. (It appears that
	the semantics of this flag have changed and now break spim.)

	* Configure Imakefile Makefile.cygwin Makefile.std Tests/tt.le.s
	Tests/tt.be.s Tests/tt.core.s Tests/tt.core.OK Tests/tt.endian.OK:
	Factored torture tests into endian-indpendent and endian-dependent
	pieces.

2003-01-04    <larus@HomeMachine>

	* Version 6.5 released.

	* spim.c PCSpimView.cpp:
	If started with only one argument, assume it is a file
	name. [Armin Mueller [arm.in@web.de]]

	* :
	Added Alt-F4 shortcut to PCSpim.

	* trap.handler:
	Return to instruction at EPC on interrupt. Comment code
	better. [Nuno Lau [lau@det.ua.pt]]

	* spim.c:
	Partioned print_reg into 3 cases, to avoid casting int to char* on
	64 bit machine. [Ken Swarner [kswarner@siena.edu]]

	* spim.html:
	Cleaned up file and added installation instructions.

2003-01-03    <larus@HomeMachine>

	* README:
	Typo in README. [Ian Langworth [bass@ccs.neu.edu]]

2003-01-01    <larus@HomeMachine>

	* run.c:
	Got (real!) hardware exception on integer overflow in
	division. [Deborah Ariel Pickett [debbiep@mail.csse.monash.edu.au]]

	* xspim.c:
	-trap_file did not properly parse argument in xspim. [From:
	William Waite [William.Waite@Colorado.EDU]]

	* scanner.l:
	Fixed printing of error on last line without a carriage
	return. [Max Hailperin [max@gac.edu]]

	* display-utils.c:
	Print proper registers when printing hex FP numbers. [Armin
	Mueller [arm.in@web.de]]

	* mem.c:
	Properly zero newly allocated memory. [Guillaume Melquiond
	[gmelquio@ens-lyon.fr], Bill Siever [bsiever@umr.edu, Diego Billi
	[dbilli@CS.UniBO.IT], Alberto Montresor [montreso@cs.unibo.it],
	Max Gilbert [max@ebs330.eb.uah.edu]] Konrad Rymuza [zeljko@wp.pl]

	* SettingsDlg.cpp:
	Set delayed branch & load check box when bare check box is
	checked. [Marco Cova [mcova@umail.ucsb.edu]]

	* trap.handler:
	Added nops (addu $0, $0, 0) to trap handler, so that it works
	properly in bare mode! [Marco Cova [mcova@umail.ucsb.edu]]

	* sym-tbl.c:
	Avoid null ref when there is no instruction in memory before a
	load instruction. [Steven Borkman [borkman@cse.Buffalo.EDU]]

	* spim.html:
	Removed reference to spimwin.ps since file disappeared (.pdf
	remains) [hemmendd@athena.union.edu]

	* PCSPIM.HLP:
	File was corrupted.

2002-01-12    <larus@HomeMachine>

	* Release SPIM 6.4a

	* spim.html:
	Update with latest info.

	* mips-syscall.c:
	Use unix read/write/open/close not just windows
	_read/_write/_open/_close.

	* xspim.h xspim.c:
	Bad function prototypes.

2002-01-01    <larus@HomeMachine>

	* Release SPIM 6.4

	* PCSpimView.cpp:
	Ensure that register and data segment windows do not shift focus
	when underlying values change.  [Vollmar, Kenneth R
	krv133f@smsu.edu]

	* parser.y tt.le.s:
	Fixed translation of USH to eliminate side-effect and warning.

	* mips-syscall.c:
	Eliminated compiler warnings at high warning level.

	* mips-syscall.c spim-syscall.h:
	Added open/close read/write system calls. [Doug Johnson
	djohnson@cs.washington.edu]

	* Configure:
	Added entries for Mac OSX. [Jeffrey Naset jeff@naset.net]

2001-12-24    <larus@HomeMachine>

	* parser.y:
	Translation of USH pseudo-op used register $1 twice, which didn't
	work. Changed it so it modifies its first argument instead (and
	issued warning of side effect).

	* PCSpimView.cpp:
	Report parser warnings distinct from errors.

	* parser.y:
	REM pseudo-op requires 3 arguments. [Rigel rigelf@angelfire.com]

	* ConsoleWnd.h:
	Return window's content as a string so it can be dumped to a
	file. [Bill Siever bsiever@umr.edu]

	* parser.y inst.h tt.le.s tt.be.s:
	Make LUI's immediate unsigned (since it is not sign
	extended). [Georgia Grant grantg@pacbell.net]

	* SpimSupport.cpp:
	Check that buffer in read_input is not null and that size is
	reasonable. [ webmaster.it@libero.it]

	* scanner.l:
	Buffer overrun when handling bad input terminated by EOF rather
	than \nl. [Max Hailperin max@gac.edu]

	* spim-utils.c:
	Symbol "main" was not marked as global in the symbol table. [From:
	J. P. Mellor jpmellor@rose-hulman.edu]

	* mem.c:
	Zero newly allocated data byte-by-byte, to avoid zapping data in
	last word of non-word aligned data area. [Peter Gammie
	peteg@cse.unsw.edu.au]

	* scanner.l:
	Properly handle characters overwritten by null in scanner when
	looking for the end of the current line.  [From:
	Cary.G.Gray@wheaton.edu]

	* sym-tbl.c tt.le.s tt.be.s:
	Did not properly check that high-order 4 bits in jump
	instruction's PC match corresponding bits in target instruction's
	PC.

	* parser.y:
	Eliminated reduce/reduce conflict in div instruction.

	* Makefile.cygwin:
	Added -g flag. Changed from yacc to bison. Changed "diff" to "diff
	-w" to ignore cr/lf differences.

2001-02-08    <larus@HomeMachine>

	* parser.y:
	Did not handle rem pseudo op properly, which caused a fatal error
	or core dump. [Rigel Freden]

2001-02-01    <larus@HomeMachine>

	* spim.c spim.h trap.handler:
	Added commands to dump text segment (in binary). [Brian
	R. Gaeke brg@pasteur.EECS.Berkeley.EDU]

	* buttons.c:
	Allow character literal in set-value dialog box. [Brian
	R. Gaeke brg@pasteur.EECS.Berkeley.EDU]

	* mips-syscall.c spim-syscall.h Documentation\spim.tex:
	Added system call to print a character and read a character.
	[Brian R. Gaeke brg@pasteur.EECS.Berkeley.EDU]

	* xspim.c xspim.h buttons.c:
	Add button to clear xspim console. [Brian R. Gaeke
	brg@pasteur.EECS.Berkeley.EDU].

2001-01-14    <larus@HomeMachine>

	* spim.c:
	Fix print_all_regs to define the stack allocated buffer's length
	as a constant, not a variable.  This wasn't ANSI C and upset Sun's
	compiler. [Matt.Simmons@eng.sun.com]

2000-12-25    <larus@HomeMachine>

	* Release 6.3.

	* IMakefile, Makefile.cygwin Makefile.st:
	Rename SH to CSH.

2000-12-24    <larus@HomeMachine>

	* Makefile.std:
	Set defaults to work under Linux.

2000-12-23    <larus@HomeMachine>

	* MainFrm.cpp MainFrm.cpp PCSpim.cpp:
	When frame resized, resize panes.

2000-12-22    <larus@HomeMachine>

	* PCView.cpp:
	Refresh all windows before initialization finished when user had
	to respecify trap handler location through dialog box.

	* Makefile.cygwin:
	Remove .exe files.

	* scanner.l:
	Ignore carrage returns in input files.

	* Imakefile:
	Explicitly set SH=csh, since stderr redirection does not work in sh.

2000-12-10    <larus@HomeMachine>

	* xspim.man:
	Missing quotes screwed up formatting. [Robert Greenfield
	(rhg@gpfn.sk.ca)]

	* scanner.l (source_line):
	Include comments from source in SPIM comments. [John Bruce
	Zuckerman (johnz@cs.tamu.edu)]

	* mem.c (bad_mem_read):
	Printing of instruction bits failed when no instruction at
	address. [John Bruce Zuckerman (johnz@cs.tamu.edu)]

	* spim.h display-utils.c mips-syscall.c run.c:
	Handle display of stack better when $sp points to non-word
	boundary. [Matt Simmons, (simmonmt@eng.sun.com)]

	* parser.y:
	Change generated NOP to sll $0, $0, 0 to be consistent. [From:
	Robert Greenfield (rhg@gpfn.sk.ca)]

	* inst.c (i_type_inst_full_word and resolve_a_label_sub):
	Sign-extension fixup code for high 16 bits of lw/sw added fixup
	twice into instruction immediate field. [Robert Greenfield
	(rhg@gpfn.sk.ca) and Christian R Ward]

	(produce_immediate):
	Missed optimization of loading immediate with zero high 16
	bits. [Robert Greenfield (rhg@gpfn.sk.ca) and Christian R
	Ward]

2000-12-07    <larus@HomeMachine>

	* sys-table.c (resolve_a_label_sub):
	Correct binary encoding of negative offsets in branch instructions
	(high 2 bits were 0). [Jim Frenzel (jfrenzel@uidaho.edu) and
	others]

	* mips-syscall.c (do_syscall)
	Print single and double precision registers to up to 18 digits,
	not default 6 digits of precision. [PIERCE@hood.edu]

2000-12-06    <larus@HomeMachine>

	* spim.c (print_all_regs):
	Added spim command to print all registers. [Linus Akerlund]

2000-12-05    <larus@HomeMachine>

	* Tests/tt.le.s Tests/tt.be.s:
	Fix regression tests to work with stricter parser and changes to spim.

	* Makefile.std Imakefile:
	Change "csh" to an environment variable so shell can be changed.

	* spim.c (console_input_available):
	Comment out code to compile spim under cygwin on windows.

	* spim-utils.c (read_assembly_file):
	Open file as text (for windows).

	* run.c (run_spim):
	LWL failed with gcc (cygwin) because missing parens screwed
	associativity.

2000-12-04    <larus@HomeMachine>

	* parser.y scanner.l inst.h tt.be.s tt.le.s
	Validate range of immediate values in non-pseudo instruction and
	warn if too large. [David Kessner davidk@peakaudio.com]

Mon Jan 11 23:53:33 1999  James Larus  <larus@breeze.cs.wisc.edu>

	* tt.be.s tt.le.s:
	New tests from PC port.

	* parser.y scanner.l inst.c:
	New EOF code did not work with bison, which does not allow a
	non-terminal with the value 0.

1999-01-07  Jim Larus  <larus@drh-alpha.dns.microsoft.com>

	* spim.c xspim.c:
	Report undefined symbols before running program.

1998-12-16    <larus@HomeMachine>

	* Pervasive:
	Update copyright.

1998-12-14    <larus@HomeMachine>

	* parser.y:
	Allow pseudo ops with -pseudo flg.

	* parser.y parser.h sym-tbl.c spim.h spim-utils.c sym-tbl.h
	Test/tt.be.s:
	Bogus main undefined error if parser failed before main.

	* mem.c:
	Shift was incorrect.

	* spim.h:
	Redefine 1000K as K * K.

1998-12-14    <larus@HomeMachine>

	* mem.c:
	Force redraw of screen after updating text/data in bad address
	handler.

	* sym-tbl.c:
	Did not adjust high 16 bits in forward ref to symbol in LW/ST
	inststruction.

	* mips-syscal.c:
	Force redisplay of data segment after readining string or sbrk.

1998-12-14    <larus@HomeMachine>

	* display-utils.c:
	Change floating point format to increase precision and always
	print decimal point.

1998-12-13    <larus@HomeMachine>

	* inst.{c,h} spim.h run.c:
	Negative branch displacements handled inconsistently (shift
	before/after sign extend).

1998-12-07    <larus@HomeMachine>

	* spim-utils.c sym-tbl.c parser.y:
	Predefine main as global.  Fix symbol table initialization.

	* spim.c sym-tbl.{c,h} display-utils.c PCSpim.rc PCSpimView.cpp
	resourc.h RunDlg.cpp RunDlg.h SettingsDlg.cpp SpimReg.h:
	Print undefined symbols before running program.

1998-12-05    <larus@HomeMachine>

	* parser.y:
	Last line was not parsed if it did not end with newline.

1998-12-02    <larus@HomeMachine>

	* pcspim.ncb pcspim.dsp pcspim.plg pcspim.opt lex.yy.c parser.y:
	Invoke yacc and lex from within VS.

1998-12-01    <larus@HomeMachine>

	* pcspim.dsp pcspim.opt PCSpimView.cpp pcspim.plg xspim.c
	spim-utils.h display-utils.h:
	Share common code for formating machine contents.

1998-11-22    <larus@HomeMachine>

	* pcspim.dsp PCSpim.clw PCSpim.aps MakeHelp.bat PCSpim.hpj
	pcspim.plg pcspim.opt pcspim.ncb:
	Fix helfile compile.

	* pcspim.plg PCSPIMView.cpp:
	Default printing FP registers to FP format.

	* pcspim.dsp pcspim.plg pcspim.opt mem.c inst.h inst.c sym-tbl.c
	scanner.l:
	Eliminated warnings from VC6.0 at level 4.

Wed Jan 14 14:46:10 1998  James Larus  <larus@breeze.cs.wisc.edu>

	* run.c mem.c inst.c data.c:
	Eliminate warnings from VC5.0.

	* run.c spim-utils.c spim.c:
	Minor changes from David Curley's DOS port.

Tue Dec 30 12:17:11 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* README:
	Clarify installation instructions. [Deborah Bennett
	<deborah@cisco.com>]

	* Imakefile:
	Make Imakefile and Makefile.std writable before tar'ing. [From:
	Deborah Bennett <deborah@cisco.com>]

	* Configure:
	Added CC environment variable to allow selection of
	compiler. [Deborah Bennett <deborah@cisco.com>]

	* scanner.l:
	Reverse includes for Debian Linux. [Bennet Yee
	<bsy@play.ucsd.edu>]

	* parser.y:
	Fix parser so that label: <syntax error> did not cause parser to
	skip the rest of input. [Bennet Yee <bsy@play.ucsd.edu>]

	* spim.c (print_reg):
	Change format for printing FP registers to %g (from %f) so all
	bits are displayed. ["Jason Baumbach"
	<baumbajg@flyernet.udayton.edu>]

	* inst.c (i_type_inst):
	Operands between 2^15 and 2^16 to immediate instructions (eg addi)
	were treated as negative (signed) numbers. [From:
	jamie@cs.monash.edu.au (Jamie Scuglia)]

Wed Dec  3 14:15:35 1997  James Larus  <larus@butch.cs.wisc.edu>

	* spim.c (write_output):
	Could flush wrong file with bad descriptor.

Sat Nov 29 17:16:35 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* mem.h:
	Fix declarations in MEM_ADDRESS (changed for Alpha) that broke old
	(pre-ANSI) Sun compiler. [Laura Spoldi <laura@txc.com>]

Mon Nov 10 10:34:53 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* Documentation/spim.tex:
	Document that registers are 32-bits with. [William Waite  <waite@scotty.cs.colorado.edu>]

Mon Oct 20 15:09:34 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* Makefile.std:
	Added memory size and other defines back to default makefile.

Mon Jul 21 13:12:00 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* Version 6.0 released.

	* BLURB run.c spim-utils.c sym-tbl.c:
	Changes by DAC.

Wed Jul  9 09:00:41 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* Imakefile Makefile.std buttons.c inst. hmem.c mips-syscall.c
	reg.h spim-utils.c spim.c spim.h sym-tbl.c xspim.c xspim.h:
	Eliminate the cl-spim code since I don't want to support it and it
	will not run on the PCs.

	* buttons.c data.c inst.c mem.c mips-syscall.c spim-utils.c spim.c
	sym-tbl.c windows.c xspim.c inst.h mem.h reg.h scanner.h spim.h
	parser.y scanner.l:
	Changes for DEC Alpha systems. [Robert Moniot
	<moniot@dsm.fordham.edu>]

	* spim.c xspim.c:
	The flag -trap_file implies -trap.

	* Imakefile Makefile.std README buttons.c cl-cycle.c data.c
	mips-syscall.c run.c spim-utils.c spim.c xspim.c:
	Eliminate code to read MIPS a.out executable (where can you get
	them anyways)?

	* buttons.c spim-utils.c spim.c xspim.h Makefile.std Imakefile
	spim-utils.h:
	Clean up trap file loading.

	* prevasive:
	Clean up copyright notices.

	* dosnames.txt makefile.dos:
	Files to compile SPIM on DOS.

Tue Jul  8 17:32:55 1997  James Larus  <larus@breeze.cs.wisc.edu>

	* mips_syscall.c run.c spim-utils.c spim.c spim.h:
	Changes to port code to PCs. ["David A. Carley"
	<dac@cs.wisc.edu>]

	* inst.h:
	Eliminate redundant declarations of k_text_begins_at_point. [From:
	"David A. Carley" <dac@cs.wisc.edu>]


Wed Feb 12 12:29:03 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* reg.h xspim.c:
	Allow 32 single precision FP registers.

Fri Jan 17 08:54:44 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* Version 5.9 released.

	* spim.tex:
	Change document to have $sp point at last word of stack frame,
	instead of first free word no stack (no code changes).

Wed Jan  8 14:08:44 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* inst.c:
	Change of 12/16 included NULL in lines.

Tue Jan  7 17:24:32 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* scanner.l spim.c spim-utils.c xspim.c spim.h:
	Added -pseudo/-nopseudo flag.

Mon Dec 16 13:22:47 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* inst.c:
	Fix printing of long lines (due to long symbols). [From:
	"William M. Waite" <waite@snag.cs.colorado.edu>]

Thu Dec  5 15:39:01 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* Documentation/spim.tex:
	Improved documentation of div/divu to emphasis that divu is
	unsigned and that overflow testing only occurs with 3 argument
	pseudo-op. [Susan]

Mon Nov 11 08:47:16 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* xspim.c:
	Fixed highlighting of selected line while single stepping! [From:
	"William M. Waite" <waite@snag.cs.colorado.edu>]

Fri Oct  4 14:19:23 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* mem.c (print_mem):
	Word-align address before printing memory. [From:
	anderson@spelman.edu (Scott D. Anderson)]

Fri Sep 20 15:40:33 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* spim.c xspim.c:
	read_input did not consistently or correctly handle input when
	buffer was of length 1. [Ron Van Cleave
	<ronvc@hppmorvc.sc.hp.com>]

Thu Apr 11 09:04:51 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* Imakefile:
	Fix usage of -lm flag. [David Thompson <thomas@cs.wisc.edu>]

Fri Jan  5 12:57:09 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* Version 5.8 released.

	* parser.y:
	Do not clear the labels at start of a line, only after a line with
	content, so that parser allows blank line between label and
	directive. [Fischer & student.]

Fri Oct 13 08:27:53 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* parser.y:
	Translation of shift immediate (sll) to shift variable (sllv)
	missed that arguments to constructor are reversed. [From:
	jepler@herbie.unl.edu]

Tue Oct 10 13:06:09 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* parser.y:
	la $4,3 produced incorrect code. [jepler@herbie.unl.edu]

Fri Aug 25 09:19:38 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* buttons.c cl-cycle.c cl-except.{c,h} inst.c mem.{c,h} reg.h
	spim-utils.c spim.c xspim.c:
	Many cleanups for SGI. ["Peter Jacobson" <jacob@cs.umu.se>]

Thu Aug 17 08:33:19 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* Many changes to spim from: [Piers Lauder, piers@staff.cs.su.oz.au]

	* button.c mem.c:
	Added reload button.

	* button.c spim-utils.c:
	Generalized input to accept decimal values as well.

	* inst.c:
	Cleanup of instruction line disassembly formating.

	* op.h:
	Instruction format for sllv was wrong.

	* spim.c:
	Fix terminal set up for raw input.

	* xspim.c:
	Fixed display format a bit.

Tue Aug 15 11:51:11 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* Version 5.7 released.

Tue Aug 15 11:02:02 1995  James Larus  <larus@fool.cs.wisc.edu>

	* mips-syscall.c:
	The constant OPEN_MAX is ifdef'ed out of limits.h on Ultrix!

Tue Aug 15 09:47:27 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* trap.handler:
	Ignore (instead of terminating) unaligned instruction addresses,
	so that regress test works.
	* Imakefile Makefile.std:
	Add additional test that installed trap.handler is current, since
	torture test fails with old trap handler.

Fri Aug 11 15:29:43 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

	* mem.c trap.handler:
	Better error message on jump out of text segment to bogus
	address. [From: hk@odo.bercos.de]

Tue Feb 21 17:24:49 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* spim.tex:
	Change the documentation to pop a stack frame by adding to the
	$sp. [jepler@herbie.unl.edu]

Wed Feb  1 16:58:10 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* Configure mips-syscall.c read-aout.c spim-utils.c:
	Change ifdef's so SPIM compiles on SGI boxes.  The binary file
	execution does not work because of system call and executable
	format differences. [Charles Daniel <manager@cse.unl.edu>]

Fri Jan 27 17:14:43 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* Imakefile:
	Added second colon to keep GNU make happy on output of
	xmkmf. [Robert  Wieda <rw42@columbia.edu>]

Wed Jan 18 09:38:29 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* Version 5.6 rereleased.

	* tt.le.s tt.be.s:
	Eliminated references off $sp to make verification of output
	easier since change of 11/21 put the environment on the stack so
	that the initial value of $sp dependend on the user's environment.

Fri Jan 13 12:37:19 1995  James Larus  <larus@breeze.cs.wisc.edu>

	* Version 5.6 released.

	* sym-tbl.c sym-tab.h:
	Change non-ANSI header.

	* cl-cache.c mem.c cl-mem.h:
	Changes to CL-SPIM from Anne.

Tue Jan  3 14:14:59 1995  James Larus  <larus@breeze.cs.wisc.edu>

	*
	Put SPIM manual on the WWW. [David Binger
	<binger@bingo.centre.edu>]

Wed Dec 14 08:37:59 1994  James Larus  <larus@breeze.cs.wisc.edu>

	* README:
	Improved description of configuration process and eliminated
	mention of LINUX patches. [carter@cs.ucsd.edu (Larry Carter)]

Tue Dec 13 16:21:01 1994  James Larus  <larus@breeze.cs.wisc.edu>

	* run.c reg.h:
	Use reg_word and u_reg_word instead of underlying data
	types. [Stephen Bloch <sbloch@adl15.adelphi.edu>]

	* parser.y, tt.le.s, tt.be.s:
	Optimization of mult $rx, $ry, 0 into li $rx, 0 was incorrect.
	[Massimiliano Poletto <maxp@amsterdam.LCS.MIT.EDU>
	and andre@ai.mit.edu (Andre' DeHon)]

	* scanner.l:
	Make scanner accept character constants '\t' and '\n'. [From:
	hollings@cs.UMD.EDU (Jeff Hollingsworth)]

	* spim.c:
	Allow spim top-level to handle EOF (control-D) gracefully. [From:
	hollings@cs.UMD.EDU (Jeff Hollingsworth)]

	* trap.handler:
	Arguments to instructions to save & restore $at were
	backwards. [baudon@labri.u-bordeaux.fr (Olivier BAUDON)]

Mon Dec 12 17:12:58 1994  James Larus  <larus@breeze.cs.wisc.edu>

	* parser.y sym-tbl.c sym-tbl.h read-aout.c:
	Bug in resolving forward references to labels in aligned data
	statements.  The references were resolved with the unaligned
	value. [fischer@kaese.cs.wisc.edu (Charles Fischer)]

Sat Nov 26 16:08:26 1994  James Larus  <larus@titanic.cs.wisc.edu>

	* spim-utils.c:
	Ensure stack is double-word aligned after all arguments to main
	are pushed.  [Anne]

Mon Nov 21 10:09:22 1994  Jim Larus  <larus@primost.cs.wisc.edu>

	* spim-utils.c spim.c spim.man:
	Did not set up argv and envp properly when program was
	-executed. [Anne]
	Changed -execute/-file to take arguments to program after
	program's name, so they must be last now.

	* read-aout.c:
	SPIM routine were freeing non-malloced strings from ld library
	routines.

Fri Nov 11 16:56:12 1994  James Larus  <larus@breeze.cs.wisc.edu>

	* op.h run.c inst.c cl-cycle.c cl-cycle.h parser.y:
	Did not implement c.olt.s, c.olt.d, c.ult.s, c.ult.d. [Anne]

Fri Nov  4 16:20:40 1994  Jim Larus  <larus@primost.cs.wisc.edu>

	* inst.c op.h:
	Did not set SPIM instruction COND field from binary FP compare
	instructions. [Anne]

Tue Nov  1 14:48:57 1994  James Larus  <larus@breeze.cs.wisc.edu>

	* mem.c:
	Need to realloc data segment when a new one is created. [Anne]

	* read-aout.c:
	Forgot to add bss size to data segment when creating data segment
	for -execute. [Anne]

Tue Aug 30 09:09:08 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* spim.c xspim.c spim-utils.c windows.c spim.h:
	Changed type of console to be void* to avoid casting pointer to int.

Fri Aug 12 11:18:40 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* Version 5.5 released.

	* mips-syscall.c:
	Move include of sys/syscall.h into include since this file does
	not exist under AIX.

	* spim.c:
	Include termios.h as well.

Thu Aug 11 09:44:00 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* spim.c spim-utils.c Configure:
	Ifdef if machine has vfprintf and use _doprnt if not [Parag
	Patel <parag@netcom.com>, for BSDI 1.1].

	* cl-cycle.c cl-tlb.c:
	Bug fixes to print_pipeline and TLB simulation [From
	226maint@titanic.mpce.mq.edu.au (Ian Cowell), via Anne].

Fri Jul 15 12:50:27 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* Configure Makefile.std inst.c mips-syscall.c spim.c spim.h:
	Port to Solaris 2.3.

Thu Jul 14 14:48:36 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* mips-syscall.c spim.c:
	Changes to port to System V.  [Robert Lipe <robertl@arnet.com>]

	* spim.c:
	Fixed AIX ifdef.

	* mem.c mips_syscall.c:
	Eliminate bcopy/bzero calls.

Fri Jun  3 16:50:16 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* reg.h:
	Eliminate incorrect test for even register number in accessing
	FGR's.  This didn't cause problems since the only FP instructions
	that accessed FGR's didn't use this instruction. [From:
	psa@cs.Princeton.EDU]

Thu May 26 13:37:03 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* mips-syscall.c:
	Delete unneeded declaration of syscall. [From:
	rskopitz@st6000.sct.edu (ron skopitz)]

Tue Apr 26 11:34:45 1994  James Larus  (larus@breeze.cs.wisc.edu)

	* xspim.c
	Use 'g' format for floating pointer values so large numbers don't
	overflow. fields.

	* inst.c mem.c parser.y run.c spim-utils.c spim.h xspim.h
	Changes to eliminating ANSI-C related warnings from acc.

	* Configure spim-utils.c
	Split defines for strtol and strtoul (since SunOS defines the
	former, but not the latter).

	* Imakefile
	Ignore the first 5 lines of output file (the start-up message)
	when comparing test results, so as to be insensitive to version
	and trap.handler messages.

	* Configure spim.h spim-utils.c mips-syscall.c mem.c inst.c
	cl-expect.c
	Use memcpy/memset instead of bcopy/bzero functions to be more
	portable.

Mon Mar 21 08:23:21 1994  James Larus  (larus@primost.cs.wisc.edu)

	* README:
	Added information about the Amiga port of SPIM.

Tue Feb  8 15:11:31 1994  James Larus  (larus@primost.cs.wisc.edu)

	* Imakefile
	Change to scanner.l did not result in lex/flex running!

	* scanner.l
	Did not properly associate line numbers with lines because parser
	lookahead at the end of a command read the newline, thereby
	bumping the line_no counter. [jps@moravian.edu (John P.
	Stoneback)]

Tue Feb  1 14:41:31 1994  James Larus  (larus@primost.cs.wisc.edu)

	* read-aout.c:
	Changed declaration for compatibility with Ultrix 4.3 library.

Wed Jan 19 15:40:45 1994  James Larus  (larus@primost.cs.wisc.edu)

	* Version 5.4 released.

Fri Dec 24 06:20:33 1993  James Larus  (larus@primost.cs.wisc.edu)

	* Makefile.std:
	Added install target.

Tue Nov  9 16:07:08 1993  James Larus  (larus@primost.cs.wisc.edu)

	* mips-syscall.c spim-utils.c spim.c
	Did not set up argc and argv properly for -execute.  $sp now points
	to argc, even after double-word aligning stack.  Set up argv[0] for
	-execute in spim.  Added gethostname.
	[citron@plague.cs.huji.ac.il (Daniel Citron)]

Fri Nov  5 21:52:05 1993  James Larus  (larus@primost)

	* xspim.c, spim-utils.c:
	Printed message about loading trap handler.

Fri Nov  5 21:37:50 1993  James Larus  (larus@primost)

	* parser.y, spim-utils.c, Makefile.std, Imakefile:
	Fix parser so it works with bison as well as yacc.

Tue Oct 19 17:27:44 1993  James Larus  (larus@primost.cs.wisc.edu)

	* spim.tex:
	Figure showing stack frame format was incorrect: saved arguments
	listed in wrong order and arguments 1-4 missing [Frans Kaashoek
	<kaashoek@amsterdam.LCS.MIT.EDU>]

Mon Oct  4 14:27:55 1993  James Larus  (larus@primost.cs.wisc.edu)

	* scanner.l sym_tbl.h sym_tbl.c
	All top-level input (Y_ID's) entered into symbol table.

	* parser.y
	Aligning data stored in text segment left label with symbol table
	address in data segment.

	* spim.c:
	Accidentally folded cases of symbols printed by "print" command.

Tue Sep 28 16:09:35 1993  James Larus  (larus@breeze.cs.wisc.edu)

	* inst.c spim.c windows.c xspim.c inst.h spim.h parser.y:
	Purified spim & xspim to eliminate memory leaks!

Mon Aug 30 10:21:14 1993  James Larus  (larus@primost.cs.wisc.edu)

	* :
	VERSION 5.3 released.

	* Imakefile Makefile.std:
	Check that trap.handler is installed before running torture test to
	avoid cryptic error message.

Mon Aug 16 10:00:44 1993  James Larus  (larus@primost.cs.wisc.edu)

	* spim-utils.c:
	Find correct address to check for breakpoint before first instruction
	is executed [jcasey@flora.ccs.neu.edu].

Fri Jul  2 10:32:18 1993  James Larus  (larus@primost.cs.wisc.edu)

	* README
	Added mention of Documentation/cycle.ps (documenation for cl-spim
	and cl-xspim.

Mon Jun 28 17:27:14 1993  James Larus  (larus@primost.cs.wisc.edu)

	* Changes from Scott Rosenberg to cl-spim:

1.) I fixed some problems with return values in mips-syscall.c

2.) I commented out a line that causes the continue_prompt window
to pop up when stepping through code in cl-xspim

3.) I've changed some of the help menus so that you can see the
cl-spim commands and only access them when running in cycle_level
mode.


Mon May 17 15:47:52 1993  James Larus  (larus at primost)

	* mips-syscall.c cl-cache.c cl-cycle.c cl-except.c cl-cache.h
	cl-expect.h
	Change from Scott Rosenberg:

there were some problems with the signal handling because somehow an
old (and incorrect version) of gun's signal stuff was merged with mine.
fixes to both cl-spim and spim code can be found in cl-except.[ch] and
mips-syscall.c.  the errors came about due to incorrect management of
spim's pseudo memory which resulted in seg violations.

i also fixed a one line problem in mips-syscall.c in old spim code so
that return values on exit when running an assembly file in cycle mode
would match values expected by cl-spim.  (i hadn't tested this until
someone sent me mail).

i updated cl-cache.[ch] so that it could print the write back buffer.



Wed May  5 08:42:11 1993  James Larus  (larus at primost)

	* read-aout.c
	Clear symbol table before defining symbols from executable file to
	avoid conflict with trap handler's labels.

	* spim.c
	Allow multiple files to be load with multiple -file arguments.

Tue Apr 20 10:32:40 1993  James Larus  (larus at primost)

	* spim.c
	Make quit a synonym for exit.

Fri Mar 26 14:58:53 1993  James Larus  (larus at primost)

    	* sym-tbl.c
	Did not fix branch offset field in encoded instruction after label
	resolved. [Fischer].

Wed Mar 24 11:25:02 1993  James Larus  (larus at primost)

	* xspim.c
	Fix printing of stack arguments. [Charles Fischer].

	* button.c
	Put arg's to main back on stack after reinitialization.

	* parser.y
	Fix previous change to NOR.

Tue Mar 23 16:26:50 1993  James Larus  (larus at primost)

	* parser.y
	Fix code generation for SUB/NOR w/ immediate, which generated
	extra register traffic [Charles Fischer].

Thu Mar  4 08:37:30 1993  James Larus  (larus at primost)

	* run.c tt.le.s
	Bug in lwr when offset is 0 for little-endian machines [From:
	kohn@ICSI.Berkeley.EDU (Philip Kohn)]

	* xspim.c
	Displayed incorrect registers for single precision floats [From:
	Charles Fischer].

Sat Feb 13 14:05:01 1993  James Larus  (larus at primost)

	* spim.tex
	Change start of data segment from 0x1000000 to 0x10000000 (correct
	value).  From smith@harvard.

Tue Jan 26 08:40:45 1993  James Larus  (larus at primost)

	* run.c sym_tbl.c
	Delayed instructions in bare mode were incorrect: executed 1 too
	many instructions and didn't calculate backward offset correctly
	[A.P.Sexton@computer-science.birmingham.ac.uk].

	* Imakefile
	Change EXTRA_LIBRARIES to LOCAL_LDFLAGS to be compatable with
	older xmkmfs.

Mon Jan 25 08:38:37 1993  James Larus  (larus at primost)

	* Rerelase 5.2

	* Imakefile
	Change EXTRA_DEFINES to DEFINES to be compatible with older xmkmfs.

Wed Jan 20 12:58:34 1993  James Larus  (larus at primost)

	* Rerelease 5.2

	* mips-syscall.c
	Used untranslated value in mapping sigvec system call.

	* mem.c
	Bug in writing value into stack after it grows.

Mon Jan 18 10:05:58 1993  James Larus  (larus at primost)

	* Release 5.2

	* mem.h mips-syscall.c parser.y spim.c spim.h xspim.c xspim.h
	Minor changes to port SPIM to RS6000 running AIX.

Fri Jan 15 11:47:31 1993  James Larus  (larus at primost)

	* trap.handler
	Save and restore $at in the trap handler.

	* parser.y scanner.l sym-tbl.c sym-tbl.h
	Parse a wide variety of additional constructs produced by cc, gcc,
	and lcc in .S files.

	* spim.c xspim.c tt.io.s
	Bugs in mapped IO: be more careful about restoring state in
	switching between console and program mode.
	Also, use only RAW mode, not CBREAK mode.

Mon Dec 14 10:10:28 1992  James Larus  (larus at primost)

	* spim.man xspim.man
	Wrote man page for spim and xspim.

	* buttons.c cl-cycle.c windows.c xspim.c
	Minor fixes for cl-xspim (hidden buttons, bad decls).
	[From:A.P.Sexton@computer-science.birmingham.ac.uk]

Tue Nov 24 16:35:12 1992  James Larus  (larus at primost)

	* button.c spim-utils.c
	Read in memory addresses as unsigned, not signed, numbers.

	* mem.c
	Raise immediate interrupt after enabling interrupts on ready
	transmitter.

Mon Nov 23 10:53:48 1992  James Larus  (larus at primost)

	* parser.y op.h
	.label directive should be .lab and it failed [Scott Kempf].

	* parser.y
	sllv $r, $r, 4 core dumped [Scott Kempf].

	* inst.c
	Don't print empty brackets on instruction display line.

	* sym_tbl.c
	Don't try to change data into instruction encoding of itself.

	* data.c data.h parser.y
	Unaligned (but auto-aligned) .word with forward reference failed
	because backpatch data structure did not catch alignment [Scott Kempf].

Mon Nov  9 08:37:54 1992  James Larus  (larus at primost)

	* tt.le.s tt.be.s
	Overflow test did not work for signed/unsigned add [Scott Kempf].

	* trap.handler
	Don't change $sp in trap handler [Scott Kempf].

Fri Nov  6 11:45:17 1992  James Larus  (larus at primost)

	* pervasive
	Brought up SPIM on HP Snakes running HPUX (System V).

Thu Nov  5 13:24:54 1992  James Larus  (larus at primost)

	* Configure Imakefile Makefile.std
	Extended Configure to determine  -DNEED_VSPRINTF and -DNEED_STRTOL
	flags.

	* inst.c
	Breakpoint instruction was being freed by memory clear [Quentin
	Dunchue].

Fri Oct 30 11:21:25 1992  James Larus  (larus at primost)

	* Released version 5.1

	* mem.c
	Stack segment not grown correctly.

	* mem.c scanner.l spim-utils.c sym-tbl.c inst.c
	Didn't correctly zero instructions.  Added xmalloc/zmalloc routines
	to avoid problems.  [From Scott Kempf.]

	* parser.y tt.le.s tt.be.s
	NOT pseudo op was incorrect: was bitwise boolean on low bit, not
	logical negation of whole word {From Scott Kempf.]

Wed Oct 28 11:42:06 1992  James Larus  (larus at primost)

	* Configure Imakefile README
	Added Configure shell script for endian-ness.

Tue Oct 27 16:21:58 1992  James Larus  (larus at primost)

	* mips-syscall.c
	Allow 0 as address to mips system call.

	* xspim.c
	Clean-up printing of single precision floats and of floats as hex
	numbers.

Wed Oct 21 14:40:38 1992  James Larus  (larus at primost)

	* run.c spim.c spim.h xspim.c
	Fixed up earlier changes to mapped io (now -mapped_io/-nomapped_io).

Mon Oct 19 11:14:41 1992  James Larus  (larus at primost)

	* scanner.l
	Allow character constants (e.g., 'a').

	* spim.c
	Include sys/ioctl.h in spim.c [Flavio DeCastilhos - SONY/SMSC
	flavio@smsc.sony.com].

	* spim.c xspim.c Imakefile Makefile Tests/tt.le.s Tests/tt.be.s
	Tests/tt.in
	Spim IO and mapped IO interact poorly.  Added -mapio/-nomapio flag
	to distinguish them.

Wed Sep 30 09:19:52 1992  James Larus  (larus at primost)

	* scanner.l
	Don't pass bare string as format to error [Kempf].

	* spim-utils.c parser.y
	Added \n to error messages [spim-utils.c from Scott Kempf].

Fri Sep 25 08:17:54 1992  James Larus  (larus at primost)

	* run.c tt.le.s tt.be.s
	Did not handle carry-out in long multiplication routine correctly.
	Got wrong answer for -1*-1!  [jjackson@tiger.carl.ua.edu]

Wed Sep 23 09:43:29 1992  James Larus  (larus at primost)

        * Released SPIM v5.0

Fri Sep 18 08:43:18 1992  James Larus

	* xspim.c
	Reinit world when loading executable into xspim.

Wed Sep 16 15:19:27 1992  James Larus  (larus at primost)

	* spim.c  buttons.c cl-cycle.c cl-cycle.h mips-syscall.c xspim.c
	Changes from Scott R.

Mon Sep 14 16:16:29 1992  James Larus  (larus at primost)

	* spim.c xspim.c
	Don't load trap handler with -execute flag.

Thu Sep 10 14:47:52 1992  James Larus  (larus at primost)

	* IMakefile
	Wrote a IMakefile for the xmkmf program.

Wed Sep  2 11:49:05 1992  James Larus  (larus at primost)

	* Makefile buttons.c cl-cache.c cl-cache.h cl-cycle.c cl-cycle.h
	cl-except.c cl-except.h cl-tlb.c cl-tlb.h mem.c mips-syscall.c
	mips-syscall.h spim.c xspim.c xpsim.h
	Merge in Scott R's changes to cl-spim.


Wed Aug 12 16:14:46 1992  James Larus  (larus at primost)

	* buttons.c mem.c mem.h mips-syscall.c reg.h run.c spim.c spim.h
	xspim.c xspim.h
	Added memory-mapped IO facility.

Tue Aug 11 09:12:31 1992  James Larus  (larus at primost)

	* pervasive
	Merged in Anne Roger's cycle-level simulator.

	* inst.c
	Print sll $0, $0, 0 as nop.

	* run.c
	Missed carry in partial sum in double word multiply.

Mon Aug 10 15:44:13 1992  James Larus  (larus at primost)

	* read-aout.c
	Add global symbols from a.out to SPIM symbol table.

	* spim-utils.c
	Make sure $sp is double-word aligned.

Thu Aug  6 10:44:23 1992  James Larus  (larus at primost)

	* read-aout.c
	Cleaned up code to read executable by taking advantage of previous
	change to read a.out header directly into text seg.

	* inst.c inst.h mem.c
	Made data reads from text segment (eg jump tables) work correctly
	by saving binary values.

	* inst.c inst.h
	Changed instruction to be a typedef.

Fri Jul 31 12:09:57 1992  James Larus  (larus at primost)

	* pervasive
	New copyright notices.

	* read-aout.c
	Allocate header text memory for OMAGIC files.

	* spim-utils.c
	Pass envp to main in $a2 [Gun].

	* mips-syscall.h mips-syscall.c run.c
	Used Gun's modification of syscall code and his exception code in
	place of old code in run.c.

	* run.c
	Loads produce value immediately to avoid recursive call on
	run_spim, which produced incorrect result in recursive call due to
	a delayed branch. [Gun]

	* run.c, tt.le.s, tt.be.s
	Sign extension of branch immediate was incorrect (bit 13, not 15).
	[Gun]

Mon Jul 27 09:36:17 1992  James Larus  (larus at primost)

	* data.c data.h inst.c parser.y scanner.l trap.handler
	Added optional argument to .text, .data, .sdata, .rdata, .ktext,
	.kdata to specify address of next items in segment (good idea from
	mipssim).

	* scanner.l
	Complain about use of opcode as label.

Tue May 26 09:48:32 1992  James Larus  (larus at primost)

	* mem.c read-aout.c mips-syscalls.
	Changes from Emin Gun Sirer to fix minor problems with executing
	a.out files.

	* xspim.c window.c
	Fixed highlighting of executed instruction while single stepping.
	It is amazing how difficult X makes this simple task.

	* inst.c inst.h scanner.h scanner.l xspim.c
	Print the source line along with the disassembled code.

	* xspim.c
	Only display 16 (not 32!) single precision FP registers.

Thu May 14 14:12:14 1992  James Larus  (larus at primost)

	* pervasive
	Make spim/xspim ansi-C compatible.  Changed file and declaration
	structure and added function prototypes.

Thu Apr 30 13:25:45 1992  James Larus  (larus at primost)

	* xspim.c
	Changed xspim's input to be more like fgets: previously had
	off-by-1 error on buffer size and return when buffer filled.

	* xspim.c
	Block of zero-fill data was incorrectly printed one memory
	location too far.

	* data.c inst.c mem.c parser.y spim-utils.c sym_tbl.c
	Backpatching of unresolved addresses did not work for code in data
	segment.

Wed Apr 15 12:06:28 1992  James Larus  (larus at primost)

	* inst.c, xspim.c
	Bug fixes from Kempf:
	Floating point registers now output as $f4 instead of F4.
	print_imm_expr had a small bug that erased part of what it printed.
	bne and beq printed there registers in the wrong order
	Allows xspim to use Expose events when it is waiting for input.

Fri Mar 27 11:11:22 1992  James Larus  (larus at primost)

	* spim-utils.c data.c
	Did not turn off in_kernel flag after loading trap handler so
	executable code's data segment went into kernel data. [Emin
	Gun Sirer <egs@cs.Princeton.EDU>]

Wed Mar 25 17:13:49 1992  James Larus  (larus at primost)

	* op.h
	Bug in encoding of RFE & TLB instructions [vijay@zycad.com
	(Vijay Vaidyanathan)].

Mon Feb 24 15:49:06 1992  James Larus  (larus at primost)

	* xspim.c
	Reallocated, but did not free buffer used for displaying register
	values.

Fri Jan 31 11:54:20 1992  James Larus  (larus at primost)

	* parser.y
	Syntax shortcomming: needed to add ':' modifier for .ascii and
	.asciiz directive.  Real bug: needed to set usr/kernel space for
	.sdata/.rdata directives.

Mon Jan 13 10:22:39 1992  James Larus  (larus at primost)

	* Version 4.4 released.

	* xspim.c
	Changes for X11R5 libraries.  Got rid of textact.c.

	* xspim.c
	Extra indirection in arguments to X stuff.

Tue Jan  7 11:31:28 1992  James Larus  (larus at primost)

	* spim.h
	Increase default number of instructions executed to a huge value.

	* run.c
	Can't continue after exit syscall.

	* parser.y scanner.l
	Partially allow opcodes to be used as identifiers.  Still can't
	use them as labels before colon because of LALR lookahead problem.

Mon Dec 23 12:02:48 1991  James Larus  (larus at primost)

	* spim.c buttons.c spim.tex
	Set breakpoints at labels as well as memory addresses.

	* inst.c mem.c mem.h run.cc sym_tbl.c spim.tex
	Added conversion so that reads and writes of instructions work
	correctly in the text and data segments.  This means that programs
	can manipulate instructions as data and execute out of the data
	segment.  Also fixed bug in jumps to addresses with high bits set
	(ie in data segment). [Suggestion from Eliot Moss.]

	* mem.c spim-utils.c spim.c spim.h xspim.c spim.tex
	Changed memory expansion code.  Text segments do not expand. The
	data segments only expand with sbrk.  Stack segments expand
	automatically. Added new command line options to set segment sizes
	and limits. [Suggestion from Eliot Moss.]

Fri Dec 20 14:09:23 1991  James Larus  (larus at primost)

	* data.c inst.c mem.h spim-utils.c
	.extern directive was broken (from Hans Koomen).  Also fixed many
	bugs in $gp stuff.

Wed Dec 18 14:43:54 1991  James Larus  (larus at primost)

	* spim.c
	Error in program run under -file caused botched longjmp.

Mon Dec  9 16:04:31 1991  James Larus  (larus at primost)

	* spim-utils.c
	Added copyright notice.

Thu Oct 31 10:49:30 1991  James Larus  (larus at primost)

	* xspim.c, xutils.c, Makefile
	Cleanup X stuff a bit and eliminate xutils.c.

	* run.c
	Computed carry improperly in negating result after multiplication.

	* parser.y
	Bug in test in mulo (Eliot Moss).

	* inst.h
	Minor typos (from Eliot Moss).

Mon Oct 21 11:04:53 1991  James Larus  (larus at primost)

	* run.c
	Carry did not propagate from lo->hi in multiplicaton (from Scott).

Fri Aug 30 09:50:10 1991  James Larus  (larus at primost)

	* Version 4.3 released.

	* tt.*
	Move all of the tests to the subdirectory Tests/

	* tt.alu.bare.s tt.fpu.bare.s
	New test of the ALU and FPU instructions in bare mode (from Anne
	Rogers).

	* run.c
	Need to force delayed updating in lwl/lwr in bare mode.

Tue Aug 27 13:35:01 1991  James Larus  (larus at primost)

	* run.c
	Delayed loads of unsigned bytes and halfs did not mask out bits
	(from Anne Rogers).

Mon Aug 26 10:30:59 1991  James Larus  (larus at primost)

	* data.c
	Set the variable program_break for assembly-language programs as
	well as a.out files.

Fri Aug 23 13:09:15 1991  James Larus  (larus at primost)

	* data.c
	Did not save unaligned data larger than a byte properly (from Jeff
	Jackson).

	* run.c spim-utils.c spim.c
	LWC1 did not update the destination register in the bare machine
	(from Anne Rogers).
	Load trap.handler in non-bare machine mode.

Fri May 10 10:40:29 1991  James Larus  (larus at primost)

	* Version 4.2 released.

	* spim.tex
	Improved the documentation in many small ways, including a couple
	of sections on MIPS conventions.

	* inst.c
	Print R# as $# in instructions.

	* xspim.c button.c
	Clear the console window when the machine is reset.

Thu May  9 16:00:56 1991  James Larus  (larus at primost)

	* Makefile, scanner.l
	Changes to permit use of 8-bit scanners produced by flex.

	* data.c mem.c mem.h op.h parser.y spim-utils.c spim.h
	trap.handler xspim.c
	Added kdata segment [From Scott Kemp.]


Sun May  5 14:16:39 1991  James Larus  (larus at primost)

	* xspim.c
	xspim was null-terminating full buffer in read_string.

	* spim-util.c spim.c
	Handle non-existing file gracefully in spim.

Fri Apr 12 17:01:39 1991  James Larus  (larus at primost)

	* inst.c, tt.le.s, tt.be.s
	lw with small negative offset did not work.

Thu Apr  4 12:03:35 1991  James Larus  (larus at primost)

	* spim.c
	Clear redo flag on serious error to prevent single-step loop at
	error.

Mon Mar 25 14:02:21 1991  James Larus  (larus at primost)

	* Released version 4.1.

Thu Mar 21 09:01:18 1991  James Larus  (larus at primost)

	* parser.y
	More problems with labels fixed.

	* mem.c
	Raise exceptions, not fatal errors on out of bounds memory refs.

Tue Mar 19 16:09:15 1991  James Larus  (larus at primost)

	* parser.y
	Treat hanging labels as if they occured on next non-blank line.

	* mem.c
	Better error messages for out-of-bounds memory references.

	* run.c, sym_tbl.c
	j instruction did not work when high 4 bits of PC were non-zero
	(ie kernel).

Wed Mar 13 17:29:18 1991  James Larus  (larus at primost)

	* xspim.c
	Corrected eror when $sp is non-word aligned and displaying stack
	segment.

Mon Mar 11 10:22:18 1991  James Larus  (larus at primost)

	* xspim.c
	Made ^C work in read_input.

	* mem.c
	Expand stack had typo that screwed up byte references to stack.

Thu Mar  7 15:39:18 1991  James Larus  (larus at primost)

	* op.h
	Correct cvt instruction encodings.

	* inst.c
	Computation of absolute offset was wrong when high bit set because
	of sign-extension (from Scott Kemp).

Tue Jan 29 13:28:56 1991  James Larus  (larus at primost)

	* scanner.l, parser.y
	Avoid some spurious parse errors caused by eating newline in error
	recovery [From Scott Kempf].

Tue Jan 22 08:59:53 1991  James Larus  (larus at primost)

	* xspim.c
	Printed wrong single precsision FP numbers.

	* parser.y
	Fixed spurious warning about $f31.

Mon Jan 14 11:50:26 1991  James Larus  (larus at primost)

	* Version 4.0 released.

	* buttons.c inst.c mem.c mem.h windows.c xspim.c xspim.h xutils.c
	New interface.  Instead of file window, added windows into text
	and data segments that are dynamically updated.

Fri Jan 11 09:25:26 1991  James Larus  (larus at primost)

	* buttons.c inst.c spim-utils.c
	A number of bugs in breakpoints eliminated.  Can properly continue
	from single-stepping at a breakpoint.  Eliminated infinite loop in
	deleting breakpoints.  Don't allow double breakpoints.

	* xspim.c
	Added the ability to display single floats.
	Also can display any register set in natural or hex notation.

Thu Jan 10 13:45:13 1991  James Larus  (larus at primost)

	* sym_tbl.c
	Needed to sign-extend the short offset field in branches after
	shifting right.

	* parser.y
	Some branch instructions had their operands switched.

	* parser.y
	Accept <offset> + <label> as expression.

	* scanner.l
	Catch and report unknown characters.

Fri Jan  4 11:26:06 1991  James Larus  (larus at primost)

	* inst.c op.h run.c spim.h
	Improved printing of offsets in branches and jumps by shifting
	left 2 places and reducing the symbolic cruft printed.

Tue Dec 18 12:05:38 1990  James Larus  (larus at primost)

	* buttons.c
	Added continue button to step menu.

Wed Dec 12 11:48:48 1990  James Larus  (larus at primost)

	* mem.c tt.le.s tt.be.s
	Test to decide which segment to exapnd was broken.

	* mem.h reg.h spim.h mem.c run.c spim.c xspim.c
	Added new class of errors (run_error) that terminate program, but
	not spim.

Tue Dec 11 07:15:40 1990  James Larus  (larus at primost)

	* run.c spim-syscall.h
	Added read_double system call and re-numbered calls.

	* button.c xspim.c spim.c
	Don't load trap handler when clearing bare machine.

	* trap.handler
	Exit on IBUS exception to avoid infinite loop.

	* run.c trap.handler
	Better exception error messages.

	* op.h
	COP1 opcode was incorrect [Goodman].

	* scanner.l
	Accept floating point numbers without trailing fraction (e.g. 2.).

	* parser.y
	Control register specifier in CTCz/CFCz was ignored.

	* data.c op.h parser.y trap.handler tt.?e.s
	Corrected ".asciz" directive to be ".asciiz".

	* scanner.l
	Improved syntax error message printing.

	* parser.y op.h
	Added .livereg decl for cc v2.10 compiler.

	* inst.c
	Improved printing of immediate expressions by eliminating
	redundant information.

	* parser.y tt.le.s tt.be.s
	LI did not work properly on constants > 32K [Canderson].

Mon Dec 10 14:36:39 1990  James Larus  (larus at primost)

	* run.c trap.handler tt.le.s tt.bare.s tt.be.s
	Simulated syscalls now use correct syscall convention: $v0 to pass
	code, and $a0,... for args.

	* Pervasive.
	Can invoke many MIPS system calls from executable files (David W.).

	* buttons.c spim-utils.c
	Pass command-line arguments to programs.

	* Many small bugs from running executables.


Tue Nov 20 15:18:28 1990  James Larus  (larus at primost)

	* spim-util.c
	Check that source file doesn't begin with magic number.

	* read-aout.c spim-utils.c spim.h
	Added source_file flag to identify the type of the input file.

Thu Oct 25 11:45:58 1990  James Larus  (larus at primost)

	* parser.y, op.h
	Eliminated div_i hack by overloading "div" operator.

Wed Oct 24 17:26:49 1990  James Larus  (larus at primost)

	* parser.y
	Parse div_i instruction!

Tue Sep 25 13:18:43 1990  James Larus  (larus at primost)

	* tt.bare.s
	Put trap handler in kernel, just as in trap.handler.

Fri Sep 21 10:52:32 1990  James Larus  (larus at primost)

	* button.c xspim.c
	Used file name from -file for load dialog box.

	* spim-utils.c, inst.c
	Can now delete breakpoint while stopped at it.

	* Rereleased version 3.0.

	* xspim.c
	Popup continue dialog even when continuing from breakpoint.

	* mem.c
	Check that read/write is within bounds after expanding memory.

Wed Sep 19 15:18:00 1990  James Larus  (larus at primost)

	* Rereleased version 3.0.

	* spim-util.c
	Cleared breakpoints upon reset.

	* button.c xspim.c
	Fixed continue button so it works properly.  Also, made ^C work
	better with the new continue button.

Tue Sep 18 11:56:16 1990  James Larus  (larus at primost)

	* Rereleased version 3.0.

	* buttons.c spim-utils.c spim.c xspim.c
	Added popup to continue from breakpoints.

Thu Sep  6 11:04:00 1990  James Larus  (larus at primost)

	* Rereleased version 3.0.

	* Changed xspim's printing of FP registers to fit better.

	* read_float and read_string did not read from console window.

Tue Sep  4 16:25:46 1990  James Larus  (larus at primost)

	* Released version 3.0.

	* Renamed syscall registers to start at $a0 (not $a1).

Fri Aug 31 10:51:29 1990  James Larus  (larus at primost)

	* Made 2 button dialog work properly on newline.

	* Only permit one instance of each menu.

Wed Aug 29 07:52:41 1990  James Larus  (larus at primost)

	* Rereleased 3.0 beta of Aug. 29.

	* Added dialog box for run.

	* Made entries in most dialog boxes persistent between invocations.

	* Catch and properly handle control C.

	* Clear memory before loading executable to get rid of trap handler.

	* Aborting load trashed saved file name.

	* Released 3.0 beta of Aug. 29.

	* Improved register display to all registers more compactly.

	* Made popups non-exclusive. [wagner@bullwinkle.Colorado.EDU]

	* Beta bug fixes from David Wood:
	xspim -file started running program right away.
	Single-stepping cleared Cause register.
	Can change R0.

	Added -execute flag to xspim.
	Made memory expansion work properly.


Tue Aug 28 11:29:44 1990  James Larus  (larus at primost)

	* Released 3.0 beta of Aug. 28.

	* Makefile buttons.c mem.c spim-utils.c xspim.c xutils.c
	Beta bug fixes from David Wood:
	Single stepping N steps failed.
	Setting breakpoint at bad address killed system.
	Single stepping through a breakpoint failed.
	Setting register to value beginning with 0x failed.
	Removed unnecessary file opens.
	Improved error checking.
	Added auxilary routines for vsprintf and strtol.

Mon Aug 27 13:53:22 1990  James Larus  (larus at primost)

	* button.c
	Improved help message.

	* Makefile
	Use ./spim, not spim in test.

	* Released 3.0beta.

	* buttons.c parser.y scanner.l spim-util.c windows.c xspim.c
	Rewrote user interface code.

Fri Aug 24 15:14:19 1990  James Larus  (larus at primost)

	* Pervasive.
	Added X window interface by Alan Siow.

Tue Aug 21 08:56:04 1990  James Larus  (larus at primost)

	* Makefile inst.c mem.c mem.h op.h parser.y read-aout.c spim.c
	spim.h trap.handler
	Added kernel text segment (but not kernel data/stack segments).

Mon Aug 20 14:21:35 1990  James Larus  (larus at primost)

	* spim.c trap.handler tt.le.s
	Leave Cause register set in single/step mode and clear in trap
	handler.

Fri Aug 17 14:58:04 1990  James Larus  (larus at primost)

	* spim.c
	Don't start top-level with executable file.
	Execute a.out from starting address in file.

Thu Aug 16 16:56:12 1990  James Larus  (larus at primost)

	* Released version 2.5 (no announcement).

Fri Jul 27 14:36:50 1990  James Larus  (larus at primost)

	* Makefile inst.c spim.c read-aout.c
	Added code to read MIPS a.out files.

	* pervasive
	Changed printing of hexdecimal numbers to be fixed format.

	* parser.y, inst.c
	Allowed instructions in data segment and word data in instruction
	segment.

Wed Jul 25 13:47:11 1990  James Larus  (larus at primost)

	* inst.c op.h run.c scanner.l
	Added code to convert betwen MIPS binary format and internal
	format for instructions.

Mon Jul  2 09:43:24 1990  James Larus  (larus at primost)

	* spim.c
	-asm flag did not work properly.

	* inst.h, inst.c, run.c
	Improper sign-extension of constant in backward branches.

	* parser.y, op.h
	Added .alias and .noalias assembler directives (ignored).

Thu May 24 09:57:30 1990  James Larus  (larus at primost)

	* Version 2.3 released.

	* inst.c op.h parser.y, spim.tex tt.?e.s
	Implemented ROL/ROR instructions.  Fixed bug that caused S?LV
	instructiosn to print fields in reverse order.

Wed May 23 09:52:57 1990  James Larus  (larus at primost)

	* scanner.l, spim.tex
	For an unknown reason, v0 and v1 were called v2, v3.  Fixed this
	bug. [beihl%cadillac.cad.mcc.com@mcc.com (Gary Beihl)]

Mon May 21 15:34:12 1990  James Larus  (larus at primost)

	* run.c, spim.c, spim.h, scanner.l
	Recompiled on DECstation under T4.0.  That system has bug in atoi,
	but other changes seem worthwhile. [whaley@dungeon.pa.dec.com]

	* Version 2.2 released.

Thu May 17 16:41:18 1990  James Larus  (larus at primost)

	* run.c, inst.c, parser.y, tt.?e.s
	Constants were not sign-extended in arithmetic immediate
	instructions.  Now produce literal values with ORI, not ADDI.
	[carl@aurora.com (Carl Stehle)]

Mon May 14 13:35:27 1990  James Larus  (larus at primost)

	* scanner.l
	Remove typo in string.  Also, change call on strtol to sscanf
	since the first function doesn't appear to be standard BSD. [From:
	Brian R Murphy <hindmost@ATHENA.MIT.EDU>]