mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-21 04:31:04 +08:00
220622dde5
This patch adds a new macro, libm_alias_finite, to define all _finite symbol. It sets all _finite symbol as compat symbol based on its first version (obtained from the definition at built generated first-versions.h). The <fn>f128_finite symbols were introduced in GLIBC 2.26 and so need special treatment in code that is shared between long double and float128. It is done by adding a list, similar to internal symbol redifinition, on sysdeps/ieee754/float128/float128_private.h. Alpha also needs some tricky changes to ensure we still emit 2 compat symbols for sqrt(f). Passes buildmanyglibc. Co-authored-by: Adhemerval Zanella <adhemerval.zanella@linaro.org> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
102 lines
1.6 KiB
ArmAsm
102 lines
1.6 KiB
ArmAsm
/*
|
|
* Written by J.T. Conklin <jtc@netbsd.org>.
|
|
* Public domain.
|
|
*
|
|
* Correct handling of y==-inf <drepper@gnu>
|
|
*/
|
|
|
|
#include <machine/asm.h>
|
|
#include <i386-math-asm.h>
|
|
#include <libm-alias-finite.h>
|
|
|
|
.section .rodata
|
|
|
|
.align ALIGNARG(4)
|
|
.type zero_nan,@object
|
|
zero_nan:
|
|
.double 0.0
|
|
nan: .byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
|
|
.byte 0, 0, 0, 0, 0, 0, 0, 0x80
|
|
.byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f
|
|
ASM_SIZE_DIRECTIVE(zero_nan)
|
|
|
|
|
|
#ifdef PIC
|
|
# define MO(op) op##@GOTOFF(%ecx)
|
|
# define MOX(op,x,f) op##@GOTOFF(%ecx,x,f)
|
|
#else
|
|
# define MO(op) op
|
|
# define MOX(op,x,f) op(,x,f)
|
|
#endif
|
|
|
|
.text
|
|
ENTRY(__ieee754_scalb)
|
|
fldl 12(%esp)
|
|
fxam
|
|
fnstsw
|
|
fldl 4(%esp)
|
|
andl $0x4700, %eax
|
|
cmpl $0x0700, %eax
|
|
je 1f
|
|
andl $0x4500, %eax
|
|
cmpl $0x0100, %eax
|
|
je 2f
|
|
fxam
|
|
fnstsw
|
|
andl $0x4500, %eax
|
|
cmpl $0x0100, %eax
|
|
je 3f
|
|
fld %st(1)
|
|
frndint
|
|
fcomp %st(2)
|
|
fnstsw
|
|
sahf
|
|
jne 4f
|
|
fscale
|
|
fstp %st(1)
|
|
DBL_NARROW_EVAL
|
|
ret
|
|
|
|
/* y is -inf */
|
|
1: fxam
|
|
#ifdef PIC
|
|
LOAD_PIC_REG (cx)
|
|
#endif
|
|
fnstsw
|
|
movl 8(%esp), %edx
|
|
shrl $5, %eax
|
|
fstp %st
|
|
fstp %st
|
|
andl $0x80000000, %edx
|
|
andl $0x0228, %eax
|
|
cmpl $0x0028, %eax
|
|
je 4f
|
|
andl $8, %eax
|
|
shrl $27, %edx
|
|
addl %edx, %eax
|
|
fldl MOX(zero_nan, %eax, 1)
|
|
ret
|
|
|
|
/* The result is NaN, but we must not raise an exception.
|
|
So use a variable. */
|
|
2: fstp %st
|
|
fstp %st
|
|
#ifdef PIC
|
|
LOAD_PIC_REG (cx)
|
|
#endif
|
|
fldl MO(nan)
|
|
ret
|
|
|
|
/* The first parameter is a NaN. Return it. */
|
|
3: fstp %st(1)
|
|
ret
|
|
|
|
/* Return NaN and raise the invalid exception. */
|
|
4: fstp %st
|
|
fstp %st
|
|
fldz
|
|
fdiv %st
|
|
ret
|
|
END(__ieee754_scalb)
|
|
libm_alias_finite (__ieee754_scalb, __scalb)
|