From e28e9b1ec40d5b545d980b0a36cbe41f3d1dbf6a Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Mon, 21 May 2018 16:54:46 -0700 Subject: x86-64: Check Prefer_FSRM in ifunc-memmove.h Although the REP MOVSB implementations of memmove, memcpy and mempcpy aren't used by the current processors, this patch adds Prefer_FSRM check in ifunc-memmove.h so that they can be used in the future. * sysdeps/x86/cpu-features.h (bit_arch_Prefer_FSRM): New. (index_arch_Prefer_FSRM): Likewise. * sysdeps/x86/cpu-tunables.c (TUNABLE_CALLBACK (set_hwcaps)): Also check Prefer_FSRM. * sysdeps/x86_64/multiarch/ifunc-memmove.h (IFUNC_SELECTOR): Also return OPTIMIZE (erms) for Prefer_FSRM. --- sysdeps/x86/cpu-tunables.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'sysdeps/x86/cpu-tunables.c') diff --git a/sysdeps/x86/cpu-tunables.c b/sysdeps/x86/cpu-tunables.c index a21a615ec2..af761dcbbc 100644 --- a/sysdeps/x86/cpu-tunables.c +++ b/sysdeps/x86/cpu-tunables.c @@ -241,6 +241,8 @@ TUNABLE_CALLBACK (set_hwcaps) (tunable_val_t *valp) CHECK_GLIBC_IFUNC_ARCH_NEED_CPU_BOTH (n, cpu_features, Slow_SSE4_2, SSE4_2, disable, 11); + CHECK_GLIBC_IFUNC_ARCH_BOTH (n, cpu_features, Prefer_FSRM, + disable, 11); break; case 13: if (disable) -- cgit v1.2.3-70-g09d2