/** * 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