glibc/sysdeps/i386/fpu/e_pow.S
Ulrich Drepper fee732e531 * intl/Makefile (tst-gettext[45].out): Pass also $(run-program-prefix)
as argument to the scripts.
	* intl/tst-gettext2.sh: Use mkdir -p instead of test -d + mkdir.
	* intl/tst-gettext4.sh: Likewise.  Use run_program_prefix argument.
	* intl/tst-gettext5.sh: Likewise.

	* intl/tst-translit.sh: Add mkdir -p.

	* sysdeps/unix/sysv/linux/i386/sysdep.h (SETUP_PIC_REG): Use
	.ifndef/.endif to allow use of this macro more than once per .S
	file.
	(LOAD_PIC_REG): New macro.
	* sysdeps/unix/sysv/linux/i386/makecontext.S: Add call frame
	information.
	* sysdeps/unix/sysv/linux/i386/getcontext.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/vfork.S: Likewise.
	* sysdeps/i386/fpu/s_asinh.S: Use LOAD_PIC_REG macro.  Add call frame
	information.
	* sysdeps/i386/fpu/e_log10f.S: Likewise.
	* sysdeps/i386/fpu/s_expm1.S: Likewise.
	* sysdeps/i386/fpu/e_acoshf.S: Likewise.
	* sysdeps/i386/fpu/e_log2l.S: Likewise.
	* sysdeps/i386/fpu/s_log1pf.S: Likewise.
	* sysdeps/i386/fpu/s_lrint.S: Likewise.
	* sysdeps/i386/fpu/s_llrint.S: Likewise.
	* sysdeps/i386/fpu/s_ilogbf.S: Likewise.
	* sysdeps/i386/fpu/s_cbrtl.S: Likewise.
	* sysdeps/i386/fpu/s_asinhf.S: Likewise.
	* sysdeps/i386/fpu/e_log.S: Likewise.
	* sysdeps/i386/fpu/e_atanhf.S: Likewise.
	* sysdeps/i386/fpu/s_lrintl.S: Likewise.
	* sysdeps/i386/fpu/e_atanhl.S: Likewise.
	* sysdeps/i386/fpu/e_scalb.S: Likewise.
	* sysdeps/i386/fpu/s_log1p.S: Likewise.
	* sysdeps/i386/fpu/s_nearbyintl.S: Likewise.
	* sysdeps/i386/fpu/s_frexpl.S: Likewise.
	* sysdeps/i386/fpu/s_log1pl.S: Likewise.
	* sysdeps/i386/fpu/s_nearbyintf.S: Likewise.
	* sysdeps/i386/fpu/s_cbrt.S: Likewise.
	* sysdeps/i386/fpu/s_expm1l.S: Likewise.
	* sysdeps/i386/fpu/s_lrintf.S: Likewise.
	* sysdeps/i386/fpu/e_acosh.S: Likewise.
	* sysdeps/i386/fpu/s_cexp.S: Likewise.
	* sysdeps/i386/fpu/s_ilogbl.S: Likewise.
	* sysdeps/i386/fpu/s_expm1f.S: Likewise.
	* sysdeps/i386/fpu/e_powl.S: Likewise.
	* sysdeps/i386/fpu/e_powf.S: Likewise.
	* sysdeps/i386/fpu/e_scalbf.S: Likewise.
	* sysdeps/i386/fpu/e_logl.S: Likewise.
	* sysdeps/i386/fpu/e_acoshl.S: Likewise.
	* sysdeps/i386/fpu/s_frexp.S: Likewise.
	* sysdeps/i386/fpu/e_pow.S: Likewise.
	* sysdeps/i386/fpu/e_logf.S: Likewise.
	* sysdeps/i386/fpu/e_log2.S: Likewise.
	* sysdeps/i386/fpu/s_frexpf.S: Likewise.
	* sysdeps/i386/fpu/s_cexpl.S: Likewise.
	* sysdeps/i386/fpu/s_llrintf.S: Likewise.
	* sysdeps/i386/fpu/s_ilogb.S: Likewise.
	* sysdeps/i386/fpu/e_scalbl.S: Likewise.
	* sysdeps/i386/fpu/e_atanh.S: Likewise.
	* sysdeps/i386/fpu/e_log10.S: Likewise.
	* sysdeps/i386/fpu/s_cbrtf.S: Likewise.
	* sysdeps/i386/fpu/s_cexpf.S: Likewise.
	* sysdeps/i386/fpu/s_llrintl.S: Likewise.
	* sysdeps/i386/fpu/e_log10l.S: Likewise.
	* sysdeps/i386/fpu/s_nearbyint.S: Likewise.
	* sysdeps/i386/fpu/s_asinhl.S: Likewise.
	* sysdeps/i386/fpu/e_log2f.S: Likewise.
	* sysdeps/i386/addmul_1.S: Various fixes to cfi handling.
	* sysdeps/i386/mul_1.S: Likewise.
	* sysdeps/i386/strtok.S: Likewise.
	* sysdeps/i386/sub_n.S: Likewise.
	* sysdeps/i386/submul_1.S: Likewise.
	* sysdeps/i386/i586/addmul_1.S: Likewise.
	* sysdeps/i386/i586/memcpy.S: Likewise.
	* sysdeps/i386/i586/mul_1.S: Likewise.
	* sysdeps/i386/i586/rshift.S: Likewise.
	* sysdeps/i386/i586/sub_n.S: Likewise.
	* sysdeps/i386/i586/submul_1.S: Likewise.
	* sysdeps/i386/i686/memcmp.S: Likewise.
	* sysdeps/i386/i686/memmove.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/mmap.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/mmap64.S: Likewise.
	* sysdeps/unix/sysv/linux/i386/setcontext.S: Likewise.
2005-05-04 17:58:13 +00:00

361 lines
7.4 KiB
ArmAsm
Raw Blame History

/* ix87 specific implementation of pow function.
Copyright (C) 1996, 1997, 1998, 1999, 2001, 2004, 2005
Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <machine/asm.h>
#ifdef __ELF__
.section .rodata
#else
.text
#endif
.align ALIGNARG(4)
ASM_TYPE_DIRECTIVE(infinity,@object)
inf_zero:
infinity:
.byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f
ASM_SIZE_DIRECTIVE(infinity)
ASM_TYPE_DIRECTIVE(zero,@object)
zero: .double 0.0
ASM_SIZE_DIRECTIVE(zero)
ASM_TYPE_DIRECTIVE(minf_mzero,@object)
minf_mzero:
minfinity:
.byte 0, 0, 0, 0, 0, 0, 0xf0, 0xff
mzero:
.byte 0, 0, 0, 0, 0, 0, 0, 0x80
ASM_SIZE_DIRECTIVE(minf_mzero)
ASM_TYPE_DIRECTIVE(one,@object)
one: .double 1.0
ASM_SIZE_DIRECTIVE(one)
ASM_TYPE_DIRECTIVE(limit,@object)
limit: .double 0.29
ASM_SIZE_DIRECTIVE(limit)
ASM_TYPE_DIRECTIVE(p63,@object)
p63: .byte 0, 0, 0, 0, 0, 0, 0xe0, 0x43
ASM_SIZE_DIRECTIVE(p63)
#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_pow)
fldl 12(%esp) // y
fxam
#ifdef PIC
LOAD_PIC_REG (cx)
#endif
fnstsw
movb %ah, %dl
andb $0x45, %ah
cmpb $0x40, %ah // is y == 0 ?
je 11f
cmpb $0x05, %ah // is y == <EFBFBD>inf ?
je 12f
cmpb $0x01, %ah // is y == NaN ?
je 30f
fldl 4(%esp) // x : y
subl $8,%esp
cfi_adjust_cfa_offset (8)
fxam
fnstsw
movb %ah, %dh
andb $0x45, %ah
cmpb $0x40, %ah
je 20f // x is <EFBFBD>0
cmpb $0x05, %ah
je 15f // x is <EFBFBD>inf
fxch // y : x
/* fistpll raises invalid exception for |y| >= 1L<<63. */
fld %st // y : y : x
fabs // |y| : y : x
fcompl MO(p63) // y : x
fnstsw
sahf
jnc 2f
/* First see whether `y' is a natural number. In this case we
can use a more precise algorithm. */
fld %st // y : y : x
fistpll (%esp) // y : x
fildll (%esp) // int(y) : y : x
fucomp %st(1) // y : x
fnstsw
sahf
jne 2f
/* OK, we have an integer value for y. */
popl %eax
cfi_adjust_cfa_offset (-4)
popl %edx
cfi_adjust_cfa_offset (-4)
orl $0, %edx
fstp %st(0) // x
jns 4f // y >= 0, jump
fdivrl MO(one) // 1/x (now referred to as x)
negl %eax
adcl $0, %edx
negl %edx
4: fldl MO(one) // 1 : x
fxch
6: shrdl $1, %edx, %eax
jnc 5f
fxch
fmul %st(1) // x : ST*x
fxch
5: fmul %st(0), %st // x*x : ST*x
shrl $1, %edx
movl %eax, %ecx
orl %edx, %ecx
jnz 6b
fstp %st(0) // ST*x
ret
/* y is <20>NAN */
30: fldl 4(%esp) // x : y
fldl MO(one) // 1.0 : x : y
fucomp %st(1) // x : y
fnstsw
sahf
je 31f
fxch // y : x
31: fstp %st(1)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
2: /* y is a real number. */
fxch // x : y
fldl MO(one) // 1.0 : x : y
fld %st(1) // x : 1.0 : x : y
fsub %st(1) // x-1 : 1.0 : x : y
fabs // |x-1| : 1.0 : x : y
fcompl MO(limit) // 1.0 : x : y
fnstsw
fxch // x : 1.0 : y
sahf
ja 7f
fsub %st(1) // x-1 : 1.0 : y
fyl2xp1 // log2(x) : y
jmp 8f
7: fyl2x // log2(x) : y
8: fmul %st(1) // y*log2(x) : y
fst %st(1) // y*log2(x) : y*log2(x)
frndint // int(y*log2(x)) : y*log2(x)
fsubr %st, %st(1) // int(y*log2(x)) : fract(y*log2(x))
fxch // fract(y*log2(x)) : int(y*log2(x))
f2xm1 // 2^fract(y*log2(x))-1 : int(y*log2(x))
faddl MO(one) // 2^fract(y*log2(x)) : int(y*log2(x))
fscale // 2^fract(y*log2(x))*2^int(y*log2(x)) : int(y*log2(x))
addl $8, %esp
cfi_adjust_cfa_offset (-8)
fstp %st(1) // 2^fract(y*log2(x))*2^int(y*log2(x))
ret
// pow(x,<EFBFBD>0) = 1
.align ALIGNARG(4)
11: fstp %st(0) // pop y
fldl MO(one)
ret
// y == <EFBFBD>inf
.align ALIGNARG(4)
12: fstp %st(0) // pop y
fldl 4(%esp) // x
fabs
fcompl MO(one) // < 1, == 1, or > 1
fnstsw
andb $0x45, %ah
cmpb $0x45, %ah
je 13f // jump if x is NaN
cmpb $0x40, %ah
je 14f // jump if |x| == 1
shlb $1, %ah
xorb %ah, %dl
andl $2, %edx
fldl MOX(inf_zero, %edx, 4)
ret
.align ALIGNARG(4)
14: fldl MO(one)
ret
.align ALIGNARG(4)
13: fldl 4(%esp) // load x == NaN
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
// x is <EFBFBD>inf
15: fstp %st(0) // y
testb $2, %dh
jz 16f // jump if x == +inf
// We must find out whether y is an odd integer.
fld %st // y : y
fistpll (%esp) // y
fildll (%esp) // int(y) : y
fucompp // <empty>
fnstsw
sahf
jne 17f
// OK, the value is an integer, but is the number of bits small
// enough so that all are coming from the mantissa?
popl %eax
cfi_adjust_cfa_offset (-4)
popl %edx
cfi_adjust_cfa_offset (-4)
andb $1, %al
jz 18f // jump if not odd
movl %edx, %eax
orl %edx, %edx
jns 155f
negl %eax
155: cmpl $0x00200000, %eax
ja 18f // does not fit in mantissa bits
// It's an odd integer.
shrl $31, %edx
fldl MOX(minf_mzero, %edx, 8)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
16: fcompl MO(zero)
addl $8, %esp
cfi_adjust_cfa_offset (-8)
fnstsw
shrl $5, %eax
andl $8, %eax
fldl MOX(inf_zero, %eax, 1)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
17: shll $30, %edx // sign bit for y in right position
addl $8, %esp
cfi_adjust_cfa_offset (-8)
18: shrl $31, %edx
fldl MOX(inf_zero, %edx, 8)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
// x is <EFBFBD>0
20: fstp %st(0) // y
testb $2, %dl
jz 21f // y > 0
// x is <EFBFBD>0 and y is < 0. We must find out whether y is an odd integer.
testb $2, %dh
jz 25f
fld %st // y : y
fistpll (%esp) // y
fildll (%esp) // int(y) : y
fucompp // <empty>
fnstsw
sahf
jne 26f
// OK, the value is an integer, but is the number of bits small
// enough so that all are coming from the mantissa?
popl %eax
cfi_adjust_cfa_offset (-4)
popl %edx
cfi_adjust_cfa_offset (-4)
andb $1, %al
jz 27f // jump if not odd
cmpl $0xffe00000, %edx
jbe 27f // does not fit in mantissa bits
// It's an odd integer.
// Raise divide-by-zero exception and get minus infinity value.
fldl MO(one)
fdivl MO(zero)
fchs
ret
cfi_adjust_cfa_offset (8)
25: fstp %st(0)
26: addl $8, %esp
cfi_adjust_cfa_offset (-8)
27: // Raise divide-by-zero exception and get infinity value.
fldl MO(one)
fdivl MO(zero)
ret
cfi_adjust_cfa_offset (8)
.align ALIGNARG(4)
// x is <EFBFBD>0 and y is > 0. We must find out whether y is an odd integer.
21: testb $2, %dh
jz 22f
fld %st // y : y
fistpll (%esp) // y
fildll (%esp) // int(y) : y
fucompp // <empty>
fnstsw
sahf
jne 23f
// OK, the value is an integer, but is the number of bits small
// enough so that all are coming from the mantissa?
popl %eax
cfi_adjust_cfa_offset (-4)
popl %edx
cfi_adjust_cfa_offset (-4)
andb $1, %al
jz 24f // jump if not odd
cmpl $0xffe00000, %edx
jae 24f // does not fit in mantissa bits
// It's an odd integer.
fldl MO(mzero)
ret
cfi_adjust_cfa_offset (8)
22: fstp %st(0)
23: addl $8, %esp // Don't use 2 x pop
cfi_adjust_cfa_offset (-8)
24: fldl MO(zero)
ret
END(__ieee754_pow)