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581c785bf3
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
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/* Common definition for memset/memset_chk ifunc selections.
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All versions must be listed in ifunc-impl-list.c.
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Copyright (C) 2017-2022 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 <init-arch.h>
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extern __typeof (REDIRECT_NAME) OPTIMIZE (erms) attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned_erms)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned) attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned_erms)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned_rtm)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned_erms_rtm)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (evex_unaligned)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (evex_unaligned_erms)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned_erms)
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attribute_hidden;
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extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_no_vzeroupper)
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attribute_hidden;
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static inline void *
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IFUNC_SELECTOR (void)
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{
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const struct cpu_features* cpu_features = __get_cpu_features ();
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if (CPU_FEATURES_ARCH_P (cpu_features, Prefer_ERMS))
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return OPTIMIZE (erms);
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if (CPU_FEATURE_USABLE_P (cpu_features, AVX512F)
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&& !CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_AVX512))
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{
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if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
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&& CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)
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&& CPU_FEATURE_USABLE_P (cpu_features, BMI2))
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{
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if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
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return OPTIMIZE (avx512_unaligned_erms);
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return OPTIMIZE (avx512_unaligned);
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}
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return OPTIMIZE (avx512_no_vzeroupper);
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}
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if (CPU_FEATURE_USABLE_P (cpu_features, AVX2))
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{
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if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
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&& CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)
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&& CPU_FEATURE_USABLE_P (cpu_features, BMI2))
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{
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if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
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return OPTIMIZE (evex_unaligned_erms);
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return OPTIMIZE (evex_unaligned);
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}
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if (CPU_FEATURE_USABLE_P (cpu_features, RTM))
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{
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if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
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return OPTIMIZE (avx2_unaligned_erms_rtm);
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return OPTIMIZE (avx2_unaligned_rtm);
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}
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if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER))
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{
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if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
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return OPTIMIZE (avx2_unaligned_erms);
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return OPTIMIZE (avx2_unaligned);
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}
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}
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if (CPU_FEATURE_USABLE_P (cpu_features, ERMS))
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return OPTIMIZE (sse2_unaligned_erms);
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return OPTIMIZE (sse2_unaligned);
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}
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