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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-07-05 12:41:07 -0700 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2022-07-05 16:42:42 -0700 |
| commit | b6a02c360655cbb84772bb577fcd8ae54d7f6d82 (patch) | |
| tree | 578f2159fa101a04b961569ba825ca3951c47e78 /sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S | |
| parent | c69f960b017b2cdf39335739009526a72fb20379 (diff) | |
| download | glibc-b6a02c360655cbb84772bb577fcd8ae54d7f6d82.zip glibc-b6a02c360655cbb84772bb577fcd8ae54d7f6d82.tar.gz glibc-b6a02c360655cbb84772bb577fcd8ae54d7f6d82.tar.bz2 | |
x86: Add support for building {w}memmove{_chk} with explicit ISA level
1. Refactor files so that all implementations are in the multiarch
directory
- Moved the implementation portion of memmove sse2 from memmove.S
to multiarch/memmove-sse2.S
- The non-multiarch file now only includes one of the
implementations in the multiarch directory based on the compiled
ISA level (only used for non-multiarch builds. Otherwise we go
through the ifunc selector).
2. Add ISA level build guards to different implementations.
- I.e memmove-avx2-unaligned-erms.S which is ISA level 3 will only
build if compiled ISA level <= 3. Otherwise there is no reason
to include it as we will always use one of the ISA level 4
implementations (memmove-evex-unaligned-erms.S).
3. Add new multiarch/rtld-memmove.S that just include the
non-multiarch memmove.S which will in turn select the best
implementation based on the compiled ISA level.
4. Refactor the ifunc selector and ifunc implementation list to use
the ISA level aware wrapper macros that allow functions below the
compiled ISA level (with a guranteed replacement) to be skipped.
Tested with and without multiarch on x86_64 for ISA levels:
{generic, x86-64-v2, x86-64-v3, x86-64-v4}
And m32 with and without multiarch.
isa raising memmove
Diffstat (limited to 'sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S b/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S index 8871544..2373017 100644 --- a/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S +++ b/sysdeps/x86_64/multiarch/memmove-evex-unaligned-erms.S @@ -1,4 +1,7 @@ -#if IS_IN (libc) +#include <isa-level.h> + +#if ISA_SHOULD_BUILD (4) + # define VEC_SIZE 32 # define XMM0 xmm16 # define XMM1 xmm17 @@ -26,8 +29,17 @@ # define VMOVA vmovdqa64 # define VZEROUPPER # define MOV_SIZE 6 + # define SECTION(p) p##.evex -# define MEMMOVE_SYMBOL(p,s) p##_evex_##s + +# ifndef MEMMOVE_SYMBOL +# define MEMMOVE_SYMBOL(p,s) p##_evex_##s +# endif # include "memmove-vec-unaligned-erms.S" + + +# if MINIMUM_X86_ISA_LEVEL == 4 +# include "memmove-shlib-compat.h" +# endif #endif |