H.J. Lu 1da50d4bda x86: Set Prefer_No_VZEROUPPER and add Prefer_AVX2_STRCMP ... 1. Set Prefer_No_VZEROUPPER if RTM is usable to avoid RTM abort triggered by VZEROUPPER inside a transactionally executing RTM region. 2. Since to compare 2 32-byte strings, 256-bit EVEX strcmp requires 2 loads, 3 VPCMPs and 2 KORDs while AVX2 strcmp requires 1 load, 2 VPCMPEQs, 1 VPMINU and 1 VPMOVMSKB, AVX2 strcmp is faster than EVEX strcmp. Add Prefer_AVX2_STRCMP to prefer AVX2 strcmp family functions.		2021-03-29 07:40:17 -07:00
..
cpu-features-preferred_feature_index_1.def	x86: Set Prefer_No_VZEROUPPER and add Prefer_AVX2_STRCMP	2021-03-29 07:40:17 -07:00
cpu-features.h	x86: Handle _SC_LEVEL1_ICACHE_LINESIZE [BZ #27444]	2021-03-15 05:43:26 -07:00