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x86: Add evex optimized functions for the wchar_t strcpy family

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Implemented:
    wcscat-evex  (+ 905 bytes)
    wcscpy-evex  (+ 674 bytes)
    wcpcpy-evex  (+ 709 bytes)
    wcsncpy-evex (+1358 bytes)
    wcpncpy-evex (+1467 bytes)
    wcsncat-evex (+1213 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-evex     -> 0.991
    wcscpy-evex     -> 0.587
    wcpcpy-evex     -> 0.695
    wcsncpy-evex    -> 0.719
    wcpncpy-evex    -> 0.694
    wcsncat-evex    -> 0.979

Code Size Changes:
    This change  increase the size of libc.so by ~6.3kb bytes. For
    reference the patch optimizing the normal strcpy family functions
    decreases libc.so by ~5.7kb.

Full check passes on x86-64 and build succeeds for all ISA levels w/
and w/o multiarch.
This commit is contained in:
Noah Goldstein
2022-11-08 17:38:40 -08:00
parent 642933158e
commit 64b8b6516b
33 changed files with 858 additions and 7 deletions
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3
sysdeps/x86_64/multiarch/wcscpy-generic.c
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@@ -18,8 +18,7 @@
#include <isa-level.h>
#if ISA_SHOULD_BUILD (1)
#if ISA_SHOULD_BUILD (3)
# define WCSCPY __wcscpy_generic
# include <wcsmbs/wcscpy.c>