49d1a4c562
also start prefering NtDll API. so far: * NtQueryInformationFile * NtClose adds a performance workaround for windows unicode conversion. but that should probably be removed before merging
86 lines
1.3 KiB
ArmAsm
86 lines
1.3 KiB
ArmAsm
/**
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-w64 runtime package.
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* No warranty is given; refer to the file DISCLAIMER.PD within this package.
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*/
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#include <_mingw_mac.h>
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.file "log1pf.S"
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.text
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#ifdef __x86_64__
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.align 8
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#else
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.align 4
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#endif
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/* The fyl2xp1 can only be used for values in
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-1 + sqrt(2) / 2 <= x <= 1 - sqrt(2) / 2
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0.29 is a safe value.
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*/
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limit: .float 0.29
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one: .float 1.0
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/*
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* Use the fyl2xp1 function when the argument is in the range -0.29 to 0.29,
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* otherwise fyl2x with the needed extra computation.
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*/
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.globl __MINGW_USYMBOL(log1pf)
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.def __MINGW_USYMBOL(log1pf); .scl 2; .type 32; .endef
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__MINGW_USYMBOL(log1pf):
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#ifdef __x86_64__
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movss %xmm0,-12(%rsp)
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fldln2
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flds -12(%rsp)
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fxam
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fnstsw
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fld %st
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sahf
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jc 3f // in case x is NaN or ±Inf
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4: fabs
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fcomps limit(%rip)
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fnstsw
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sahf
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jc 2f
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fadds one(%rip)
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fyl2x
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fstps -12(%rsp)
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movss -12(%rsp),%xmm0
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ret
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2: fyl2xp1
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fstps -12(%rsp)
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movss -12(%rsp),%xmm0
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ret
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3: jp 4b // in case x is ±Inf
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fstp %st(1)
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fstp %st(1)
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fstps -12(%rsp)
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movss -12(%rsp),%xmm0
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ret
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#else
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fldln2
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flds 4(%esp)
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fxam
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fnstsw
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fld %st
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sahf
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jc 3f // in case x is NaN or ±Inf
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4: fabs
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fcomps limit
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fnstsw
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sahf
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jc 2f
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fadds one
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fyl2x
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ret
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2: fyl2xp1
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ret
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3: jp 4b // in case x is ±Inf
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fstp %st(1)
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fstp %st(1)
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ret
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#endif
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