mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
6b2665f534
* math/libm-test.inc (log_test): Test -Inf and NaN. (log10_test, log1p_test, log2_test): Test -Inf. * sysdeps/i386/fpu/e_log.S (__ieee754_log): Don't raise FE_INVALID when argument is qNaN. * sysdeps/i386/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/i386/fpu/e_logf.S (__ieee754_logf): Likewise. * sysdeps/x86_64/fpu/e_logl.S (__ieee754_logl): Likewise. * sysdeps/x86_64/fpu/e_log10l.S (__ieee754_log10l): Replace andb $1, %ah with testb $1, %ah, don't test for parity, instead testb $4, %ah and jump if non-zero. * sysdeps/x86_64/fpu/e_log2l.S (__ieee754_log2l): Likewise. * sysdeps/x86_64/fpu/s_log1pl.S (__log1pl): Likewise. 2007-03-15 Jakub Jelinek <jakub@redhat.com>
67 lines
1.3 KiB
ArmAsm
67 lines
1.3 KiB
ArmAsm
/*
|
|
* Written by J.T. Conklin <jtc@netbsd.org>.
|
|
* Public domain.
|
|
*
|
|
* Adapted for `long double' by Ulrich Drepper <drepper@cygnus.com>.
|
|
* Adapted for x86-64 by Andreas Jaeger <aj@suse.de>.
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
|
|
RCSID("$NetBSD: $")
|
|
|
|
|
|
#ifdef __ELF__
|
|
.section .rodata
|
|
#else
|
|
.text
|
|
#endif
|
|
.align ALIGNARG(4)
|
|
ASM_TYPE_DIRECTIVE(one,@object)
|
|
one: .double 1.0
|
|
ASM_SIZE_DIRECTIVE(one)
|
|
/* 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. */
|
|
ASM_TYPE_DIRECTIVE(limit,@object)
|
|
limit: .double 0.29
|
|
ASM_SIZE_DIRECTIVE(limit)
|
|
|
|
|
|
#ifdef PIC
|
|
#define MO(op) op##(%rip)
|
|
#else
|
|
#define MO(op) op
|
|
#endif
|
|
|
|
.text
|
|
ENTRY(__ieee754_logl)
|
|
fldln2 // log(2)
|
|
fldt 8(%rsp) // x : log(2)
|
|
fxam
|
|
fnstsw
|
|
fld %st // x : x : log(2)
|
|
testb $1, %ah
|
|
jnz 3f // in case x is NaN or +-Inf
|
|
4: fsubl MO(one) // x-1 : x : log(2)
|
|
fld %st // x-1 : x-1 : x : log(2)
|
|
fabs // |x-1| : x-1 : x : log(2)
|
|
fcompl MO(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
|
|
|
|
3: testb $4, %ah
|
|
jnz 4b // in case x is +-Inf
|
|
fstp %st(1)
|
|
fstp %st(1)
|
|
ret
|
|
END (__ieee754_logl)
|