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glibc/sysdeps/x86_64/fpu/multiarch/s_roundevenf-sse4_1.S

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Update copyright dates with scripts/update-copyrights I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
2022-01-01 18:54:23 +00:00
/* Copyright (C) 2021-2022 Free Software Foundation, Inc.
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>
2021-05-24 01:43:11 +00:00
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
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
.section .text.sse4.1,"ax",@progbits
ENTRY(__roundevenf_sse41)
roundss $8, %xmm0, %xmm0
ret
END(__roundevenf_sse41)
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