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5313581cb5
This patch replaces i386 assembly versions of e_powf with generic
e_powf.c. For workload-spec2017.wrf, on Nehalem, it improves
performance by:
Before After Improvement
reciprocal-throughput 230.855 78.3358 194%
latency 231.685 94.1259 146%
On Skylake, it improves performance by:
Before After Improvement
reciprocal-throughput 239.858 47.4713 405%
latency 247.57 93.8798 163%
On IvyBridge with --disable-multi-arch, it improves performance by:
Before After Improvement
reciprocal-throughput 269.078 63.3758 324%
latency 271.473 102.091 165%
* sysdeps/i386/fpu/e_powf.S: Removed.
* sysdeps/i386/fpu/e_powf_log2_data.c: Likewise.
* sysdeps/i386/fpu/w_powf.c: Likewise.
* sysdeps/i386/fpu/libm-test-ulps: Updated for generic e_powf.c.
* sysdeps/i386/i686/fpu/multiarch/libm-test-ulps: Likewise.
* sysdeps/i386/i686/fpu/multiarch/Makefile (libm-sysdep_routines):
Add e_powf-sse2.
(CFLAGS-e_powf-sse2.c): New.
* sysdeps/i386/i686/fpu/multiarch/e_powf-sse2.c: New file.
* sysdeps/i386/i686/fpu/multiarch/e_powf.c: Likewise.
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* Multiple versions of powf.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#define powf __redirect_powf
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#define __DECL_SIMD___redirect_powf
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#include <math.h>
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#undef powf
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#define SYMBOL_NAME powf
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#include "ifunc-sse2.h"
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libc_ifunc_redirected (__redirect_powf, __powf, IFUNC_SELECTOR ());
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#ifdef SHARED
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__hidden_ver1 (__powf_ia32, __GI___powf, __redirect_powf)
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__attribute__ ((visibility ("hidden")));
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# include <shlib-compat.h>
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versioned_symbol (libm, __powf, powf, GLIBC_2_27);
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#else
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weak_alias (__powf, powf)
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#endif
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strong_alias (__powf, __ieee754_powf)
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strong_alias (__powf, __powf_finite)
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#define __powf __powf_ia32
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#include <sysdeps/ieee754/flt-32/e_powf.c>
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