From 7ebba91361badf7531d4e75050627a88d424872f Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 5 Mar 2021 07:26:42 -0800 Subject: x86-64: Add AVX optimized string/memory functions for RTM Since VZEROUPPER triggers RTM abort while VZEROALL won't, select AVX optimized string/memory functions with xtest jz 1f vzeroall ret 1: vzeroupper ret at function exit on processors with usable RTM, but without 256-bit EVEX instructions to avoid VZEROUPPER inside a transactionally executing RTM region. --- sysdeps/x86_64/multiarch/strcpy-avx2-rtm.S | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 sysdeps/x86_64/multiarch/strcpy-avx2-rtm.S (limited to 'sysdeps/x86_64/multiarch/strcpy-avx2-rtm.S') diff --git a/sysdeps/x86_64/multiarch/strcpy-avx2-rtm.S b/sysdeps/x86_64/multiarch/strcpy-avx2-rtm.S new file mode 100644 index 0000000000..c2c581ecf7 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcpy-avx2-rtm.S @@ -0,0 +1,12 @@ +#ifndef STRCPY +# define STRCPY __strcpy_avx2_rtm +#endif + +#define ZERO_UPPER_VEC_REGISTERS_RETURN \ + ZERO_UPPER_VEC_REGISTERS_RETURN_XTEST + +#define VZEROUPPER_RETURN jmp L(return_vzeroupper) + +#define SECTION(p) p##.avx.rtm + +#include "strcpy-avx2.S" -- cgit 1.4.1