86 lines
1.3 KiB
ArmAsm
86 lines
1.3 KiB
ArmAsm
|
/**
|
|||
|
* 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 "log1pf.S"
|
|||
|
.text
|
|||
|
#ifdef __x86_64__
|
|||
|
.align 8
|
|||
|
#else
|
|||
|
.align 4
|
|||
|
#endif
|
|||
|
/* The fyl2xp1 can only be used for values in
|
|||
|
-1 + sqrt(2) / 2 <= x <= 1 - sqrt(2) / 2
|
|||
|
0.29 is a safe value.
|
|||
|
*/
|
|||
|
limit: .float 0.29
|
|||
|
one: .float 1.0
|
|||
|
/*
|
|||
|
* Use the fyl2xp1 function when the argument is in the range -0.29 to 0.29,
|
|||
|
* otherwise fyl2x with the needed extra computation.
|
|||
|
*/
|
|||
|
.globl __MINGW_USYMBOL(log1pf)
|
|||
|
.def __MINGW_USYMBOL(log1pf); .scl 2; .type 32; .endef
|
|||
|
__MINGW_USYMBOL(log1pf):
|
|||
|
#ifdef __x86_64__
|
|||
|
movss %xmm0,-12(%rsp)
|
|||
|
fldln2
|
|||
|
flds -12(%rsp)
|
|||
|
fxam
|
|||
|
fnstsw
|
|||
|
fld %st
|
|||
|
sahf
|
|||
|
jc 3f // in case x is NaN or <EFBFBD>Inf
|
|||
|
|
|||
|
4: fabs
|
|||
|
fcomps limit(%rip)
|
|||
|
fnstsw
|
|||
|
sahf
|
|||
|
jc 2f
|
|||
|
fadds one(%rip)
|
|||
|
fyl2x
|
|||
|
fstps -12(%rsp)
|
|||
|
movss -12(%rsp),%xmm0
|
|||
|
ret
|
|||
|
|
|||
|
2: fyl2xp1
|
|||
|
fstps -12(%rsp)
|
|||
|
movss -12(%rsp),%xmm0
|
|||
|
ret
|
|||
|
|
|||
|
3: jp 4b // in case x is <EFBFBD>Inf
|
|||
|
fstp %st(1)
|
|||
|
fstp %st(1)
|
|||
|
fstps -12(%rsp)
|
|||
|
movss -12(%rsp),%xmm0
|
|||
|
ret
|
|||
|
#else
|
|||
|
fldln2
|
|||
|
flds 4(%esp)
|
|||
|
fxam
|
|||
|
fnstsw
|
|||
|
fld %st
|
|||
|
sahf
|
|||
|
jc 3f // in case x is NaN or <EFBFBD>Inf
|
|||
|
|
|||
|
4: fabs
|
|||
|
fcomps limit
|
|||
|
fnstsw
|
|||
|
sahf
|
|||
|
jc 2f
|
|||
|
fadds one
|
|||
|
fyl2x
|
|||
|
ret
|
|||
|
|
|||
|
2: fyl2xp1
|
|||
|
ret
|
|||
|
|
|||
|
3: jp 4b // in case x is <EFBFBD>Inf
|
|||
|
fstp %st(1)
|
|||
|
fstp %st(1)
|
|||
|
ret
|
|||
|
#endif
|