mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
i386: Replace assembly versions of e_expf with generic e_expf.c
This patch replaces i386 assembly versions of e_expf with generic
e_expf.c. For workload-spec2017.wrf, on Nehalem, it improves
performance by:
Before After Improvement
reciprocal-throughput 55.5724 40.2664 38%
latency 80.0687 60.8517 31%
On Skylake, it improves performance by:
Before After Improvement
reciprocal-throughput 62.4056 39.4188 58%
latency 85.5496 59.6377 43%
On IvyBridge with --disable-multi-arch, it improves performance by:
Before After Improvement
reciprocal-throughput 133.707 40.3778 231%
latency 149.191 63.2515 135%
* sysdeps/i386/fpu/e_exp2f_data.c: Removed.
* sysdeps/i386/fpu/e_expf.S: Likewise.
* sysdeps/i386/fpu/math_errf.c: Likewise.
* sysdeps/i386/fpu/w_expf.c: Likewise.
* sysdeps/i386/i686/fpu/multiarch/e_expf-ia32.S: Likewise.
* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.S: Likewise.
* sysdeps/i386/i686/fpu/multiarch/w_expf.c: Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_expf.c.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
Remove e_expf-ia32.
(CFLAGS-e_expf-sse2.c): New.
* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.c: New file.
* sysdeps/i386/i686/fpu/multiarch/e_expf.c: Rewritten.
This commit is contained in:
H.J. Lu
parent
e1f59bebd8
commit
b2f6137ea5
17
ChangeLog
17
ChangeLog
@ -1,3 +1,20 @@
|
||||
2017-10-22 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
* sysdeps/i386/fpu/e_exp2f_data.c: Removed.
|
||||
* sysdeps/i386/fpu/e_expf.S: Likewise.
|
||||
* sysdeps/i386/fpu/math_errf.c: Likewise.
|
||||
* sysdeps/i386/fpu/w_expf.c: Likewise.
|
||||
* sysdeps/i386/i686/fpu/multiarch/e_expf-ia32.S: Likewise.
|
||||
* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.S: Likewise.
|
||||
* sysdeps/i386/i686/fpu/multiarch/w_expf.c: Likewise.
|
||||
* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_expf.c.
|
||||
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
|
||||
* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
|
||||
Remove e_expf-ia32.
|
||||
(CFLAGS-e_expf-sse2.c): New.
|
||||
* sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.c: New file.
|
||||
* sysdeps/i386/i686/fpu/multiarch/e_expf.c: Rewritten.
|
||||
|
||||
2017-10-22 H.J. Lu <hongjiu.lu@intel.com>
|
||||
|
||||
* sysdeps/x86_64/fpu/e_expf.S: Removed.
|
||||
|
||||
@ -1 +0,0 @@
|
||||
/* Not needed. */
|
||||
@ -1,74 +0,0 @@
|
||||
/*
|
||||
* Written by J.T. Conklin <jtc@netbsd.org>.
|
||||
* Public domain.
|
||||
* Adapted for float type by Ulrich Drepper <drepper@cygnus.com>.
|
||||
*/
|
||||
|
||||
#include <machine/asm.h>
|
||||
#include <i386-math-asm.h>
|
||||
|
||||
DEFINE_FLT_MIN
|
||||
|
||||
#ifdef PIC
|
||||
# define MO(op) op##@GOTOFF(%ecx)
|
||||
#else
|
||||
# define MO(op) op
|
||||
#endif
|
||||
|
||||
.text
|
||||
/* e^x = 2^(x * log2(e)) */
|
||||
ENTRY(__ieee754_expf)
|
||||
#ifdef PIC
|
||||
LOAD_PIC_REG (cx)
|
||||
#endif
|
||||
flds 4(%esp)
|
||||
/* I added the following ugly construct because exp(+-Inf) resulted
|
||||
in NaN. The ugliness results from the bright minds at Intel.
|
||||
For the i686 the code can be written better.
|
||||
-- drepper@cygnus.com. */
|
||||
fxam /* Is NaN or +-Inf? */
|
||||
fstsw %ax
|
||||
movb $0x45, %dh
|
||||
andb %ah, %dh
|
||||
cmpb $0x05, %dh
|
||||
je 1f /* Is +-Inf, jump. */
|
||||
fldl2e
|
||||
fmulp /* x * log2(e) */
|
||||
fld %st
|
||||
frndint /* int(x * log2(e)) */
|
||||
fsubr %st,%st(1) /* fract(x * log2(e)) */
|
||||
fxch
|
||||
f2xm1 /* 2^(fract(x * log2(e))) - 1 */
|
||||
fld1
|
||||
faddp /* 2^(fract(x * log2(e))) */
|
||||
fscale /* e^x */
|
||||
fstp %st(1)
|
||||
FLT_NARROW_EVAL_UFLOW_NONNEG_NAN
|
||||
ret
|
||||
|
||||
1: testl $0x200, %eax /* Test sign. */
|
||||
jz 2f /* If positive, jump. */
|
||||
fstp %st
|
||||
fldz /* Set result to 0. */
|
||||
2: ret
|
||||
END (__ieee754_expf)
|
||||
|
||||
|
||||
ENTRY(__expf_finite)
|
||||
#ifdef PIC
|
||||
LOAD_PIC_REG (cx)
|
||||
#endif
|
||||
fldl2e
|
||||
fmuls 4(%esp) /* x * log2(e) */
|
||||
fld %st
|
||||
frndint /* int(x * log2(e)) */
|
||||
fsubr %st,%st(1) /* fract(x * log2(e)) */
|
||||
fxch
|
||||
f2xm1 /* 2^(fract(x * log2(e))) - 1 */
|
||||
fld1
|
||||
faddp /* 2^(fract(x * log2(e))) */
|
||||
fscale /* e^x */
|
||||
fstp %st(1)
|
||||
FLT_NARROW_EVAL_UFLOW_NONNEG
|
||||
ret
|
||||
END(__expf_finite)
|
||||
@ -1928,19 +1928,25 @@ ldouble: 1
|
||||
|
||||
Function: "exp_downward":
|
||||
double: 1
|
||||
float: 1
|
||||
idouble: 1
|
||||
ifloat: 1
|
||||
ildouble: 1
|
||||
ldouble: 1
|
||||
|
||||
Function: "exp_towardzero":
|
||||
double: 1
|
||||
float: 1
|
||||
idouble: 1
|
||||
ifloat: 1
|
||||
ildouble: 2
|
||||
ldouble: 2
|
||||
|
||||
Function: "exp_upward":
|
||||
double: 1
|
||||
float: 1
|
||||
idouble: 1
|
||||
ifloat: 1
|
||||
ildouble: 1
|
||||
ldouble: 1
|
||||
|
||||
|
||||
@ -1 +0,0 @@
|
||||
/* Not needed. */
|
||||
@ -1 +0,0 @@
|
||||
#include <sysdeps/../math/w_expf.c>
|
||||
@ -1,4 +1,6 @@
|
||||
ifeq ($(subdir),math)
|
||||
libm-sysdep_routines += e_expf-sse2 e_expf-ia32 s_sinf-sse2 s_cosf-sse2 \
|
||||
libm-sysdep_routines += e_expf-sse2 s_sinf-sse2 s_cosf-sse2 \
|
||||
s_sincosf-sse2
|
||||
|
||||
CFLAGS-e_expf-sse2.c = -msse2 -mfpmath=sse
|
||||
endif
|
||||
|
||||
@ -1,22 +0,0 @@
|
||||
/*
|
||||
Copyright (C) 2012-2017 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#define __ieee754_expf __ieee754_expf_ia32
|
||||
#define __expf_finite __expf_finite_ia32
|
||||
|
||||
#include <sysdeps/i386/fpu/e_expf.S>
|
||||
@ -1,325 +0,0 @@
|
||||
/* SSE2 version of __ieee754_expf and __expf_finite
|
||||
Copyright (C) 2012-2017 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
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, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
|
||||
#include <sysdep.h>
|
||||
|
||||
/* Short algorithm description:
|
||||
*
|
||||
* Let K = 64 (table size).
|
||||
* e^x = 2^(x/log(2)) = 2^n * T[j] * (1 + P(y))
|
||||
* where
|
||||
* x = m*log(2)/K + y, y in [0.0..log(2)/K]
|
||||
* m = n*K + j, m,n,j - signed integer, j in [0..K-1]
|
||||
* values of 2^(j/K) are tabulated as T[j].
|
||||
*
|
||||
* P(y) is a minimax polynomial approximation of expf(x)-1
|
||||
* on small interval [0.0..log(2)/K].
|
||||
*
|
||||
* P(y) = P3*y*y*y*y + P2*y*y*y + P1*y*y + P0*y, calculated as
|
||||
* z = y*y; P(y) = (P3*z + P1)*z + (P2*z + P0)*y
|
||||
*
|
||||
* Special cases:
|
||||
* __ieee754_expf_sse2(NaN) = NaN
|
||||
* __ieee754_expf_sse2(+INF) = +INF
|
||||
* __ieee754_expf_sse2(-INF) = 0
|
||||
* __ieee754_expf_sse2(x) = 1 for subnormals
|
||||
* for finite argument, only __ieee754_expf_sse2(0)=1 is exact
|
||||
* __ieee754_expf_sse2(x) overflows if x>700
|
||||
* __ieee754_expf_sse2(x) underflows if x<-700
|
||||
*
|
||||
* Note:
|
||||
* For |x|<700, __ieee754_expf_sse2 computes result in double precision,
|
||||
* with accuracy a bit more than needed for expf, and does not round it
|
||||
* to single precision.
|
||||
*/
|
||||
|
||||
|
||||
#ifdef PIC
|
||||
# define MO1(symbol) L(symbol)##@GOTOFF(%edx)
|
||||
# define MO2(symbol,reg2,_scale) L(symbol)##@GOTOFF(%edx,reg2,_scale)
|
||||
#else
|
||||
# define MO1(symbol) L(symbol)
|
||||
# define MO2(symbol,reg2,_scale) L(symbol)(,reg2,_scale)
|
||||
#endif
|
||||
|
||||
.text
|
||||
ENTRY(__ieee754_expf_sse2)
|
||||
/* Input: single precision x on stack at address 4(%esp) */
|
||||
|
||||
#ifdef PIC
|
||||
LOAD_PIC_REG(dx)
|
||||
#endif
|
||||
|
||||
cvtss2sd 4(%esp), %xmm1 /* Convert x to double precision */
|
||||
mov 4(%esp), %ecx /* Copy x */
|
||||
movsd MO1(DP_KLN2), %xmm2 /* DP K/log(2) */
|
||||
movsd MO1(DP_P2), %xmm3 /* DP P2 */
|
||||
movl %ecx, %eax /* x */
|
||||
mulsd %xmm1, %xmm2 /* DP x*K/log(2) */
|
||||
andl $0x7fffffff, %ecx /* |x| */
|
||||
cmpl $0x442f0000, %ecx /* |x|<700 ? */
|
||||
movsd MO1(DP_P3), %xmm4 /* DP P3 */
|
||||
addsd MO1(DP_RS), %xmm2 /* DP x*K/log(2)+RS */
|
||||
jae L(special_paths)
|
||||
|
||||
/* Here if |x|<700 */
|
||||
cmpl $0x31800000, %ecx /* |x|<2^(-28) ? */
|
||||
jb L(small_arg)
|
||||
|
||||
/* Main path: here if 2^(-28)<=|x|<700 */
|
||||
cvtsd2ss %xmm2, %xmm2 /* SP x*K/log(2)+RS */
|
||||
movd %xmm2, %eax /* bits of n*K+j with trash */
|
||||
subss MO1(SP_RS), %xmm2 /* SP t=round(x*K/log(2)) */
|
||||
movl %eax, %ecx /* n*K+j with trash */
|
||||
cvtss2sd %xmm2, %xmm2 /* DP t */
|
||||
andl $0x3f, %eax /* bits of j */
|
||||
mulsd MO1(DP_NLN2K), %xmm2 /* DP -t*log(2)/K */
|
||||
andl $0xffffffc0, %ecx /* bits of n */
|
||||
#ifdef __AVX__
|
||||
vaddsd %xmm1, %xmm2, %xmm0 /* DP y=x-t*log(2)/K */
|
||||
vmulsd %xmm0, %xmm0, %xmm2 /* DP z=y*y */
|
||||
#else
|
||||
addsd %xmm1, %xmm2 /* DP y=x-t*log(2)/K */
|
||||
movaps %xmm2, %xmm0 /* DP y */
|
||||
mulsd %xmm2, %xmm2 /* DP z=y*y */
|
||||
#endif
|
||||
mulsd %xmm2, %xmm4 /* DP P3*z */
|
||||
addl $0xffc0, %ecx /* bits of n + DP exponent bias */
|
||||
mulsd %xmm2, %xmm3 /* DP P2*z */
|
||||
shrl $2, %ecx /* High 2 bytes of DP 2^n */
|
||||
pxor %xmm1, %xmm1 /* clear %xmm1 */
|
||||
addsd MO1(DP_P1), %xmm4 /* DP P3*z+P1 */
|
||||
addsd MO1(DP_P0), %xmm3 /* DP P2*z+P0 */
|
||||
pinsrw $3, %ecx, %xmm1 /* DP 2^n */
|
||||
mulsd %xmm2, %xmm4 /* DP (P3*z+P1)*z */
|
||||
mulsd %xmm3, %xmm0 /* DP (P2*z+P0)*y */
|
||||
addsd %xmm4, %xmm0 /* DP P(y) */
|
||||
mulsd MO2(DP_T,%eax,8), %xmm0 /* DP P(y)*T[j] */
|
||||
addsd MO2(DP_T,%eax,8), %xmm0 /* DP T[j]*(P(y)+1) */
|
||||
mulsd %xmm1, %xmm0 /* DP result=2^n*(T[j]*(P(y)+1)) */
|
||||
cvtsd2ss %xmm0, %xmm1
|
||||
|
||||
lea -4(%esp), %esp /* Borrow 4 bytes of stack frame */
|
||||
movss %xmm1, 0(%esp) /* Move result from sse... */
|
||||
flds 0(%esp) /* ...to FPU. */
|
||||
lea 4(%esp), %esp /* Return back 4 bytes of stack frame */
|
||||
ret
|
||||
|
||||
.p2align 4
|
||||
L(small_arg):
|
||||
/* Here if 0<=|x|<2^(-28) */
|
||||
movss 4(%esp), %xmm0 /* load x */
|
||||
addss MO1(SP_ONE), %xmm0 /* 1.0 + x */
|
||||
/* Return 1.0 with inexact raised, except for x==0 */
|
||||
jmp L(epilogue)
|
||||
|
||||
.p2align 4
|
||||
L(special_paths):
|
||||
/* Here if x is NaN, or Inf, or finite |x|>=700 */
|
||||
movss 4(%esp), %xmm0 /* load x */
|
||||
|
||||
cmpl $0x7f800000, %ecx /* |x| is finite ? */
|
||||
jae L(arg_inf_or_nan)
|
||||
|
||||
/* Here if finite |x|>=700 */
|
||||
testl $0x80000000, %eax /* sign of x nonzero ? */
|
||||
je L(res_overflow)
|
||||
|
||||
/* Here if finite x<=-700 */
|
||||
movss MO1(SP_SMALL), %xmm0 /* load small value 2^(-100) */
|
||||
mulss %xmm0, %xmm0 /* Return underflowed result (zero or subnormal) */
|
||||
jmp L(epilogue)
|
||||
|
||||
.p2align 4
|
||||
L(res_overflow):
|
||||
/* Here if finite x>=700 */
|
||||
movss MO1(SP_LARGE), %xmm0 /* load large value 2^100 */
|
||||
mulss %xmm0, %xmm0 /* Return overflowed result (Inf or max normal) */
|
||||
jmp L(epilogue)
|
||||
|
||||
.p2align 4
|
||||
L(arg_inf_or_nan):
|
||||
/* Here if |x| is Inf or NAN */
|
||||
jne L(arg_nan) /* |x| is Inf ? */
|
||||
|
||||
/* Here if |x| is Inf */
|
||||
shrl $31, %eax /* Get sign bit of x */
|
||||
movss MO2(SP_INF_0,%eax,4), %xmm0/* return zero or Inf, depending on sign of x */
|
||||
jmp L(epilogue)
|
||||
|
||||
.p2align 4
|
||||
L(arg_nan):
|
||||
/* Here if |x| is NaN */
|
||||
addss %xmm0, %xmm0 /* Return x+x (raise invalid) */
|
||||
|
||||
.p2align 4
|
||||
L(epilogue):
|
||||
lea -4(%esp), %esp /* Borrow 4 bytes of stack frame */
|
||||
movss %xmm0, 0(%esp) /* Move result from sse... */
|
||||
flds 0(%esp) /* ...to FPU. */
|
||||
lea 4(%esp), %esp /* Return back 4 bytes of stack frame */
|
||||
ret
|
||||
END(__ieee754_expf_sse2)
|
||||
|
||||
.section .rodata, "a"
|
||||
.p2align 3
|
||||
L(DP_T): /* table of double precision values 2^(j/K) for j=[0..K-1] */
|
||||
.long 0x00000000, 0x3ff00000
|
||||
.long 0x3e778061, 0x3ff02c9a
|
||||
.long 0xd3158574, 0x3ff059b0
|
||||
.long 0x18759bc8, 0x3ff08745
|
||||
.long 0x6cf9890f, 0x3ff0b558
|
||||
.long 0x32d3d1a2, 0x3ff0e3ec
|
||||
.long 0xd0125b51, 0x3ff11301
|
||||
.long 0xaea92de0, 0x3ff1429a
|
||||
.long 0x3c7d517b, 0x3ff172b8
|
||||
.long 0xeb6fcb75, 0x3ff1a35b
|
||||
.long 0x3168b9aa, 0x3ff1d487
|
||||
.long 0x88628cd6, 0x3ff2063b
|
||||
.long 0x6e756238, 0x3ff2387a
|
||||
.long 0x65e27cdd, 0x3ff26b45
|
||||
.long 0xf51fdee1, 0x3ff29e9d
|
||||
.long 0xa6e4030b, 0x3ff2d285
|
||||
.long 0x0a31b715, 0x3ff306fe
|
||||
.long 0xb26416ff, 0x3ff33c08
|
||||
.long 0x373aa9cb, 0x3ff371a7
|
||||
.long 0x34e59ff7, 0x3ff3a7db
|
||||
.long 0x4c123422, 0x3ff3dea6
|
||||
.long 0x21f72e2a, 0x3ff4160a
|
||||
.long 0x6061892d, 0x3ff44e08
|
||||
.long 0xb5c13cd0, 0x3ff486a2
|
||||
.long 0xd5362a27, 0x3ff4bfda
|
||||
.long 0x769d2ca7, 0x3ff4f9b2
|
||||
.long 0x569d4f82, 0x3ff5342b
|
||||
.long 0x36b527da, 0x3ff56f47
|
||||
.long 0xdd485429, 0x3ff5ab07
|
||||
.long 0x15ad2148, 0x3ff5e76f
|
||||
.long 0xb03a5585, 0x3ff6247e
|
||||
.long 0x82552225, 0x3ff66238
|
||||
.long 0x667f3bcd, 0x3ff6a09e
|
||||
.long 0x3c651a2f, 0x3ff6dfb2
|
||||
.long 0xe8ec5f74, 0x3ff71f75
|
||||
.long 0x564267c9, 0x3ff75feb
|
||||
.long 0x73eb0187, 0x3ff7a114
|
||||
.long 0x36cf4e62, 0x3ff7e2f3
|
||||
.long 0x994cce13, 0x3ff82589
|
||||
.long 0x9b4492ed, 0x3ff868d9
|
||||
.long 0x422aa0db, 0x3ff8ace5
|
||||
.long 0x99157736, 0x3ff8f1ae
|
||||
.long 0xb0cdc5e5, 0x3ff93737
|
||||
.long 0x9fde4e50, 0x3ff97d82
|
||||
.long 0x82a3f090, 0x3ff9c491
|
||||
.long 0x7b5de565, 0x3ffa0c66
|
||||
.long 0xb23e255d, 0x3ffa5503
|
||||
.long 0x5579fdbf, 0x3ffa9e6b
|
||||
.long 0x995ad3ad, 0x3ffae89f
|
||||
.long 0xb84f15fb, 0x3ffb33a2
|
||||
.long 0xf2fb5e47, 0x3ffb7f76
|
||||
.long 0x904bc1d2, 0x3ffbcc1e
|
||||
.long 0xdd85529c, 0x3ffc199b
|
||||
.long 0x2e57d14b, 0x3ffc67f1
|
||||
.long 0xdcef9069, 0x3ffcb720
|
||||
.long 0x4a07897c, 0x3ffd072d
|
||||
.long 0xdcfba487, 0x3ffd5818
|
||||
.long 0x03db3285, 0x3ffda9e6
|
||||
.long 0x337b9b5f, 0x3ffdfc97
|
||||
.long 0xe78b3ff6, 0x3ffe502e
|
||||
.long 0xa2a490da, 0x3ffea4af
|
||||
.long 0xee615a27, 0x3ffefa1b
|
||||
.long 0x5b6e4540, 0x3fff5076
|
||||
.long 0x819e90d8, 0x3fffa7c1
|
||||
.type L(DP_T), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_T))
|
||||
|
||||
.section .rodata.cst8,"aM",@progbits,8
|
||||
.p2align 3
|
||||
L(DP_KLN2): /* double precision K/log(2) */
|
||||
.long 0x652b82fe, 0x40571547
|
||||
.type L(DP_KLN2), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_KLN2))
|
||||
|
||||
.p2align 3
|
||||
L(DP_NLN2K): /* double precision -log(2)/K */
|
||||
.long 0xfefa39ef, 0xbf862e42
|
||||
.type L(DP_NLN2K), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_NLN2K))
|
||||
|
||||
.p2align 3
|
||||
L(DP_RS): /* double precision 2^23+2^22 */
|
||||
.long 0x00000000, 0x41680000
|
||||
.type L(DP_RS), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_RS))
|
||||
|
||||
.p2align 3
|
||||
L(DP_P3): /* double precision polynomial coefficient P3 */
|
||||
.long 0xeb78fa85, 0x3fa56420
|
||||
.type L(DP_P3), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_P3))
|
||||
|
||||
.p2align 3
|
||||
L(DP_P1): /* double precision polynomial coefficient P1 */
|
||||
.long 0x008d6118, 0x3fe00000
|
||||
.type L(DP_P1), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_P1))
|
||||
|
||||
.p2align 3
|
||||
L(DP_P2): /* double precision polynomial coefficient P2 */
|
||||
.long 0xda752d4f, 0x3fc55550
|
||||
.type L(DP_P2), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_P2))
|
||||
|
||||
.p2align 3
|
||||
L(DP_P0): /* double precision polynomial coefficient P0 */
|
||||
.long 0xffffe7c6, 0x3fefffff
|
||||
.type L(DP_P0), @object
|
||||
ASM_SIZE_DIRECTIVE(L(DP_P0))
|
||||
|
||||
.p2align 2
|
||||
L(SP_INF_0):
|
||||
.long 0x7f800000 /* single precision Inf */
|
||||
.long 0 /* single precision zero */
|
||||
.type L(SP_INF_0), @object
|
||||
ASM_SIZE_DIRECTIVE(L(SP_INF_0))
|
||||
|
||||
.section .rodata.cst4,"aM",@progbits,4
|
||||
.p2align 2
|
||||
L(SP_RS): /* single precision 2^23+2^22 */
|
||||
.long 0x4b400000
|
||||
.type L(SP_RS), @object
|
||||
ASM_SIZE_DIRECTIVE(L(SP_RS))
|
||||
|
||||
.p2align 2
|
||||
L(SP_SMALL): /* single precision small value 2^(-100) */
|
||||
.long 0x0d800000
|
||||
.type L(SP_SMALL), @object
|
||||
ASM_SIZE_DIRECTIVE(L(SP_SMALL))
|
||||
|
||||
.p2align 2
|
||||
L(SP_LARGE): /* single precision large value 2^100 */
|
||||
.long 0x71800000
|
||||
.type L(SP_LARGE), @object
|
||||
ASM_SIZE_DIRECTIVE(L(SP_LARGE))
|
||||
|
||||
.p2align 2
|
||||
L(SP_ONE): /* single precision 1.0 */
|
||||
.long 0x3f800000
|
||||
.type L(SP_ONE), @object
|
||||
ASM_SIZE_DIRECTIVE(L(SP_ONE))
|
||||
|
||||
strong_alias (__ieee754_expf_sse2, __expf_finite_sse2)
|
||||
3
sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.c
Normal file
3
sysdeps/i386/i686/fpu/multiarch/e_expf-sse2.c
Normal file
@ -0,0 +1,3 @@
|
||||
#define __expf __expf_sse2
|
||||
|
||||
#include <sysdeps/ieee754/flt-32/e_expf.c>
|
||||
@ -1,4 +1,4 @@
|
||||
/* Multiple versions of expf
|
||||
/* Multiple versions of expf.
|
||||
Copyright (C) 2012-2017 Free Software Foundation, Inc.
|
||||
This file is part of the GNU C Library.
|
||||
|
||||
@ -16,22 +16,25 @@
|
||||
License along with the GNU C Library; if not, see
|
||||
<http://www.gnu.org/licenses/>. */
|
||||
|
||||
#include <init-arch.h>
|
||||
extern float __redirect_expf (float);
|
||||
|
||||
extern double __ieee754_expf_sse2 (double);
|
||||
extern double __ieee754_expf_ia32 (double);
|
||||
#define SYMBOL_NAME expf
|
||||
#include "ifunc-sse2.h"
|
||||
|
||||
double __ieee754_expf (double);
|
||||
libm_ifunc (__ieee754_expf,
|
||||
HAS_CPU_FEATURE (SSE2)
|
||||
? __ieee754_expf_sse2
|
||||
: __ieee754_expf_ia32);
|
||||
libc_ifunc_redirected (__redirect_expf, __expf, IFUNC_SELECTOR ());
|
||||
|
||||
extern double __expf_finite_sse2 (double);
|
||||
extern double __expf_finite_ia32 (double);
|
||||
#ifdef SHARED
|
||||
__hidden_ver1 (__expf_ia32, __GI___expf, __redirect_expf)
|
||||
__attribute__ ((visibility ("hidden")));
|
||||
|
||||
double __expf_finite (double);
|
||||
libm_ifunc (__expf_finite,
|
||||
HAS_CPU_FEATURE (SSE2)
|
||||
? __expf_finite_sse2
|
||||
: __expf_finite_ia32);
|
||||
# include <shlib-compat.h>
|
||||
versioned_symbol (libm, __expf, expf, GLIBC_2_27);
|
||||
#else
|
||||
weak_alias (__expf, expf)
|
||||
#endif
|
||||
|
||||
strong_alias (__expf, __ieee754_expf)
|
||||
strong_alias (__expf, __expf_finite)
|
||||
|
||||
#define __expf __expf_ia32
|
||||
#include <sysdeps/ieee754/flt-32/e_expf.c>
|
||||
|
||||
@ -1928,13 +1928,17 @@ ldouble: 1
|
||||
|
||||
Function: "exp_downward":
|
||||
double: 1
|
||||
float: 1
|
||||
idouble: 1
|
||||
ifloat: 1
|
||||
ildouble: 1
|
||||
ldouble: 1
|
||||
|
||||
Function: "exp_towardzero":
|
||||
double: 1
|
||||
float: 1
|
||||
idouble: 1
|
||||
ifloat: 1
|
||||
ildouble: 2
|
||||
ldouble: 2
|
||||
|
||||
|
||||
@ -1 +0,0 @@
|
||||
#include <sysdeps/../math/w_expf.c>
|
||||
Loading…
Reference in New Issue
Block a user