1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66
|
/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <_mingw_mac.h>
.file "internal_logl.S"
.text
#ifdef __x86_64__
.align 8
#else
.align 4
#endif
one: .double 1.0
/* It is not important that this constant is precise. It is only
a value which is known to be on the safe side for using the
fyl2xp1 instruction. */
limit: .double 0.29
.globl __MINGW_USYMBOL(__logl_internal)
.def __MINGW_USYMBOL(__logl_internal); .scl 2; .type 32; .endef
__MINGW_USYMBOL(__logl_internal):
#ifdef __x86_64__
fldln2 // log(2)
fldt (%rdx) // x : log(2)
fld %st // x : x : log(2)
fsubl one(%rip) // x-1 : x : log(2)
fld %st // x-1 : x-1 : x : log(2)
fabs // |x-1| : x-1 : x : log(2)
fcompl limit(%rip) // x-1 : x : log(2)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2f
fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
movq %rcx,%rax
movq $0,8(%rcx)
fstpt (%rcx)
ret
2: fstp %st(0) // x : log(2)
fyl2x // log(x)
movq %rcx,%rax
movq $0,8(%rcx)
fstpt (%rcx)
ret
#else
fldln2 // log(2)
fldt 4(%esp) // x : log(2)
fld %st // x : x : log(2)
fsubl one // x-1 : x : log(2)
fld %st // x-1 : x-1 : x : log(2)
fabs // |x-1| : x-1 : x : log(2)
fcompl limit // x-1 : x : log(2)
fnstsw // x-1 : x : log(2)
andb $0x45, %ah
jz 2f
fstp %st(1) // x-1 : log(2)
fyl2xp1 // log(x)
ret
2: fstp %st(0) // x : log(2)
fyl2x // log(x)
ret
#endif
|