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x86_64: roundeven with sse4.1 support
This patch adds support for the sse4.1 hardware floating point roundeven. Here is some benchmark results on my systems: =AMD Ryzen 9 3900X 12-Core Processor= * benchmark result before this commit | | roundeven | roundevenf | |------------|--------------|--------------| | duration | 3.75587e+09 | 3.75114e+09 | | iterations | 3.93053e+08 | 4.35402e+08 | | max | 52.592 | 58.71 | | min | 7.98 | 7.22 | | mean | 9.55563 | 8.61535 | * benchmark result after this commit | | roundeven | roundevenf | |------------|---------------|--------------| | duration | 3.73815e+09 | 3.73738e+09 | | iterations | 5.82692e+08 | 5.91498e+08 | | max | 56.468 | 51.642 | | min | 6.27 | 6.156 | | mean | 6.41532 | 6.3185 | =Intel(R) Pentium(R) CPU D1508 @ 2.20GHz= * benchmark result before this commit | | roundeven | roundevenf | |------------|--------------|--------------| | duration | 2.18208e+09 | 2.18258e+09 | | iterations | 2.39932e+08 | 2.46924e+08 | | max | 96.378 | 98.035 | | min | 6.776 | 5.94 | | mean | 9.09456 | 8.83907 | * benchmark result after this commit | | roundeven | roundevenf | |------------|--------------|--------------| | duration | 2.17415e+09 | 2.17005e+09 | | iterations | 3.56193e+08 | 4.09824e+08 | | max | 51.693 | 97.192 | | min | 5.926 | 5.093 | | mean | 6.10385 | 5.29507 | Signed-off-by: Shen-Ta Hsieh <ibmibmibm.tw@gmail.com> Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Shen-Ta Hsieh
H.J. Lu
parent
447954a206
commit
1683249d17
@ -1,11 +1,12 @@
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ifeq ($(subdir),math)
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libm-sysdep_routines += s_floor-c s_ceil-c s_floorf-c s_ceilf-c \
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s_rint-c s_rintf-c s_nearbyint-c s_nearbyintf-c \
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s_trunc-c s_truncf-c
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s_roundeven-c s_roundevenf-c s_trunc-c s_truncf-c
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libm-sysdep_routines += s_ceil-sse4_1 s_ceilf-sse4_1 s_floor-sse4_1 \
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s_floorf-sse4_1 s_nearbyint-sse4_1 \
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s_nearbyintf-sse4_1 s_rint-sse4_1 s_rintf-sse4_1 \
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s_nearbyintf-sse4_1 s_roundeven-sse4_1 \
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s_roundevenf-sse4_1 s_rint-sse4_1 s_rintf-sse4_1 \
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s_trunc-sse4_1 s_truncf-sse4_1
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libm-sysdep_routines += e_exp-fma e_log-fma e_pow-fma s_atan-fma \
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2
sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c
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2
sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c
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@ -0,0 +1,2 @@
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#define __roundeven __roundeven_c
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#include <sysdeps/ieee754/dbl-64/s_roundeven.c>
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24
sysdeps/x86_64/fpu/multiarch/s_roundeven-sse4_1.S
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24
sysdeps/x86_64/fpu/multiarch/s_roundeven-sse4_1.S
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@ -0,0 +1,24 @@
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/* Copyright (C) 2021 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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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.section .text.sse4.1,"ax",@progbits
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ENTRY(__roundeven_sse41)
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roundsd $8, %xmm0, %xmm0
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ret
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END(__roundeven_sse41)
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31
sysdeps/x86_64/fpu/multiarch/s_roundeven.c
Normal file
31
sysdeps/x86_64/fpu/multiarch/s_roundeven.c
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@ -0,0 +1,31 @@
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/* Multiple versions of __roundeven.
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Copyright (C) 2021 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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<https://www.gnu.org/licenses/>. */
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#include <libm-alias-double.h>
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#define roundeven __redirect_roundeven
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#define __roundeven __redirect___roundeven
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#include <math.h>
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#undef roundeven
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#undef __roundeven
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#define SYMBOL_NAME roundeven
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#include "ifunc-sse4_1.h"
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libc_ifunc_redirected (__redirect_roundeven, __roundeven, IFUNC_SELECTOR ());
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libm_alias_double (__roundeven, roundeven)
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3
sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c
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3
sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c
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#undef __roundevenf
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#define __roundevenf __roundevenf_c
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#include <sysdeps/ieee754/flt-32/s_roundevenf.c>
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24
sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S
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24
sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S
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@ -0,0 +1,24 @@
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/* Copyright (C) 2021 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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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.section .text.sse4.1,"ax",@progbits
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ENTRY(__roundevenf_sse41)
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roundss $8, %xmm0, %xmm0
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ret
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END(__roundevenf_sse41)
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31
sysdeps/x86_64/fpu/multiarch/s_roundevenf.c
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31
sysdeps/x86_64/fpu/multiarch/s_roundevenf.c
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@ -0,0 +1,31 @@
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/* Multiple versions of __roundevenf.
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Copyright (C) 2021 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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<https://www.gnu.org/licenses/>. */
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#include <libm-alias-float.h>
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#define roundevenf __redirect_roundevenf
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#define __roundevenf __redirect___roundevenf
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#include <math.h>
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#undef roundevenf
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#undef __roundevenf
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#define SYMBOL_NAME roundevenf
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#include "ifunc-sse4_1.h"
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libc_ifunc_redirected (__redirect_roundevenf, __roundevenf, IFUNC_SELECTOR ());
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libm_alias_float (__roundeven, roundeven)
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