From 52cf11004eb10f8ebbc193fbdf4094cfecb3dbff Mon Sep 17 00:00:00 2001 From: Noah Goldstein Date: Tue, 8 Nov 2022 17:38:41 -0800 Subject: x86: Add avx2 optimized functions for the wchar_t strcpy family Implemented: wcscat-avx2 (+ 744 bytes wcscpy-avx2 (+ 539 bytes) wcpcpy-avx2 (+ 577 bytes) wcsncpy-avx2 (+1108 bytes) wcpncpy-avx2 (+1214 bytes) wcsncat-avx2 (+1085 bytes) Performance Changes: Times are from N = 10 runs of the benchmark suite and are reported as geometric mean of all ratios of New Implementation / Best Old Implementation. Best Old Implementation was determined with the highest ISA implementation. wcscat-avx2 -> 0.975 wcscpy-avx2 -> 0.591 wcpcpy-avx2 -> 0.698 wcsncpy-avx2 -> 0.730 wcpncpy-avx2 -> 0.711 wcsncat-avx2 -> 0.954 Code Size Changes: This change increase the size of libc.so by ~5.5kb bytes. For reference the patch optimizing the normal strcpy family functions decreases libc.so by ~5.2kb. Full check passes on x86-64 and build succeeds for all ISA levels w/ and w/o multiarch. --- sysdeps/x86_64/multiarch/wcpcpy-generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sysdeps/x86_64/multiarch/wcpcpy-generic.c') diff --git a/sysdeps/x86_64/multiarch/wcpcpy-generic.c b/sysdeps/x86_64/multiarch/wcpcpy-generic.c index 6039196a3e..0ba29b081f 100644 --- a/sysdeps/x86_64/multiarch/wcpcpy-generic.c +++ b/sysdeps/x86_64/multiarch/wcpcpy-generic.c @@ -19,7 +19,7 @@ /* We always need to build this implementation as strspn-sse4 needs to be able to fallback to it. */ #include -#if ISA_SHOULD_BUILD (3) +#if ISA_SHOULD_BUILD (2) # define WCPCPY __wcpcpy_generic # include -- cgit 1.4.1