792e51b721
This patch adds the long double functions missing in newlib to Cygwin.
Apart from some self-written additions (exp10l, finite{f,l}, isinf{f,l},
isnan{f,l}, pow10l) the files are taken from the Mingw-w64 math lib.
Minor changes were required, e.g. substitue _WIN64 with __x86_64__ and
fixing __FLT_RPT_DOMAIN/__FLT_RPT_ERANGE for Cygwin.
Cygwin:
* math: New subdir with math functions.
* Makefile.in (VPATH): Add math subdir.
(MATH_OFILES): List of object files collected from building files in
math subdir.
(DLL_OFILES): Add $(MATH_OFILES).
${CURDIR}/libm.a: Add $(MATH_OFILES) to build.
* common.din: Add new functions from math subdir.
* i686.din: Align to new math subdir. Remove functions now commonly
available.
* x86_64.din: Ditto.
* math.h: math.h wrapper to define mingw structs used in some files in
math subdir.
* include/cygwin/version.h: Bump API minor version.
newlib:
* libc/include/complex.h: Add prototypes for complex long double
functions. Only define for Cygwin.
* libc/include/math.h: Additionally enable prototypes of long double
functions for Cygwin. Add Cygwin-only prototypes for dreml, sincosl,
exp10l and pow10l. Explain why we don't add them to newlib.
* libc/include/tgmath.h: Enable long double handling on Cygwin.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
67 lines
1.5 KiB
ArmAsm
67 lines
1.5 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 "internal_logl.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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one: .double 1.0
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/* It is not important that this constant is precise. It is only
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a value which is known to be on the safe side for using the
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fyl2xp1 instruction. */
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limit: .double 0.29
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.globl __MINGW_USYMBOL(__logl_internal)
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.def __MINGW_USYMBOL(__logl_internal); .scl 2; .type 32; .endef
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__MINGW_USYMBOL(__logl_internal):
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#ifdef __x86_64__
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fldln2 // log(2)
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fldt (%rdx) // x : log(2)
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fld %st // x : x : log(2)
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fsubl one(%rip) // x-1 : x : log(2)
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fld %st // x-1 : x-1 : x : log(2)
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fabs // |x-1| : x-1 : x : log(2)
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fcompl limit(%rip) // x-1 : x : log(2)
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fnstsw // x-1 : x : log(2)
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andb $0x45, %ah
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jz 2f
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fstp %st(1) // x-1 : log(2)
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fyl2xp1 // log(x)
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movq %rcx,%rax
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movq $0,8(%rcx)
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fstpt (%rcx)
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ret
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2: fstp %st(0) // x : log(2)
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fyl2x // log(x)
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movq %rcx,%rax
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movq $0,8(%rcx)
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fstpt (%rcx)
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ret
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#else
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fldln2 // log(2)
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fldt 4(%esp) // x : log(2)
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fld %st // x : x : log(2)
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fsubl one // x-1 : x : log(2)
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fld %st // x-1 : x-1 : x : log(2)
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fabs // |x-1| : x-1 : x : log(2)
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fcompl limit // x-1 : x : log(2)
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fnstsw // x-1 : x : log(2)
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andb $0x45, %ah
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jz 2f
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fstp %st(1) // x-1 : log(2)
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fyl2xp1 // log(x)
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ret
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2: fstp %st(0) // x : log(2)
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fyl2x // log(x)
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ret
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#endif
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