From 125c5c04cccb16dabf9d0e693df154608289d1dd Mon Sep 17 00:00:00 2001 From: Shen-Ta Hsieh Date: Mon, 24 May 2021 09:43:11 +0800 Subject: [PATCH] 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 Reviewed-by: H.J. Lu (cherry picked from commit 1683249d17e14827b6579529742eb895027dfa84) --- sysdeps/x86_64/fpu/multiarch/Makefile | 5 +-- sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c | 2 ++ .../x86_64/fpu/multiarch/s_roundeven-sse4_1.S | 24 ++++++++++++++ sysdeps/x86_64/fpu/multiarch/s_roundeven.c | 31 +++++++++++++++++++ sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c | 3 ++ .../fpu/multiarch/s_roundevenf-sse4_1.S | 24 ++++++++++++++ sysdeps/x86_64/fpu/multiarch/s_roundevenf.c | 31 +++++++++++++++++++ 7 files changed, 118 insertions(+), 2 deletions(-) create mode 100644 sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c create mode 100644 sysdeps/x86_64/fpu/multiarch/s_roundeven-sse4_1.S create mode 100644 sysdeps/x86_64/fpu/multiarch/s_roundeven.c create mode 100644 sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c create mode 100644 sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S create mode 100644 sysdeps/x86_64/fpu/multiarch/s_roundevenf.c diff --git a/sysdeps/x86_64/fpu/multiarch/Makefile b/sysdeps/x86_64/fpu/multiarch/Makefile index 9f387248..6ddd1c01 100644 --- a/sysdeps/x86_64/fpu/multiarch/Makefile +++ b/sysdeps/x86_64/fpu/multiarch/Makefile @@ -1,11 +1,12 @@ ifeq ($(subdir),math) libm-sysdep_routines += s_floor-c s_ceil-c s_floorf-c s_ceilf-c \ s_rint-c s_rintf-c s_nearbyint-c s_nearbyintf-c \ - s_trunc-c s_truncf-c + s_roundeven-c s_roundevenf-c s_trunc-c s_truncf-c libm-sysdep_routines += s_ceil-sse4_1 s_ceilf-sse4_1 s_floor-sse4_1 \ s_floorf-sse4_1 s_nearbyint-sse4_1 \ - s_nearbyintf-sse4_1 s_rint-sse4_1 s_rintf-sse4_1 \ + s_nearbyintf-sse4_1 s_roundeven-sse4_1 \ + s_roundevenf-sse4_1 s_rint-sse4_1 s_rintf-sse4_1 \ s_trunc-sse4_1 s_truncf-sse4_1 libm-sysdep_routines += e_exp-fma e_log-fma e_pow-fma s_atan-fma \ diff --git a/sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c b/sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c new file mode 100644 index 00000000..c7be43cb --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/s_roundeven-c.c @@ -0,0 +1,2 @@ +#define __roundeven __roundeven_c +#include diff --git a/sysdeps/x86_64/fpu/multiarch/s_roundeven-sse4_1.S b/sysdeps/x86_64/fpu/multiarch/s_roundeven-sse4_1.S new file mode 100644 index 00000000..6ae8f6b1 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/s_roundeven-sse4_1.S @@ -0,0 +1,24 @@ +/* Copyright (C) 2021 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 + . */ + +#include + + .section .text.sse4.1,"ax",@progbits +ENTRY(__roundeven_sse41) + roundsd $8, %xmm0, %xmm0 + ret +END(__roundeven_sse41) diff --git a/sysdeps/x86_64/fpu/multiarch/s_roundeven.c b/sysdeps/x86_64/fpu/multiarch/s_roundeven.c new file mode 100644 index 00000000..d92eda65 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/s_roundeven.c @@ -0,0 +1,31 @@ +/* Multiple versions of __roundeven. + Copyright (C) 2021 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 + . */ + +#include + +#define roundeven __redirect_roundeven +#define __roundeven __redirect___roundeven +#include +#undef roundeven +#undef __roundeven + +#define SYMBOL_NAME roundeven +#include "ifunc-sse4_1.h" + +libc_ifunc_redirected (__redirect_roundeven, __roundeven, IFUNC_SELECTOR ()); +libm_alias_double (__roundeven, roundeven) diff --git a/sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c b/sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c new file mode 100644 index 00000000..72a6e7d1 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/s_roundevenf-c.c @@ -0,0 +1,3 @@ +#undef __roundevenf +#define __roundevenf __roundevenf_c +#include diff --git a/sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S b/sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S new file mode 100644 index 00000000..a76e1080 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S @@ -0,0 +1,24 @@ +/* Copyright (C) 2021 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 + . */ + +#include + + .section .text.sse4.1,"ax",@progbits +ENTRY(__roundevenf_sse41) + roundss $8, %xmm0, %xmm0 + ret +END(__roundevenf_sse41) diff --git a/sysdeps/x86_64/fpu/multiarch/s_roundevenf.c b/sysdeps/x86_64/fpu/multiarch/s_roundevenf.c new file mode 100644 index 00000000..2ee196e6 --- /dev/null +++ b/sysdeps/x86_64/fpu/multiarch/s_roundevenf.c @@ -0,0 +1,31 @@ +/* Multiple versions of __roundevenf. + Copyright (C) 2021 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 + . */ + +#include + +#define roundevenf __redirect_roundevenf +#define __roundevenf __redirect___roundevenf +#include +#undef roundevenf +#undef __roundevenf + +#define SYMBOL_NAME roundevenf +#include "ifunc-sse4_1.h" + +libc_ifunc_redirected (__redirect_roundevenf, __roundevenf, IFUNC_SELECTOR ()); +libm_alias_float (__roundeven, roundeven) -- GitLab