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| author | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-11-01 15:30:26 -0500 |
|---|---|---|
| committer | Noah Goldstein <goldstein.w.n@gmail.com> | 2023-11-28 12:06:19 -0600 |
| commit | 9469261cf1924d350feeec64d2c80cafbbdcdd4d (patch) | |
| tree | 2d6599f49c3497e64b354a60a6ae4ee644587e05 /sysdeps/x86_64 | |
| parent | 3921c5b40f293c57cb326f58713c924b0662ef59 (diff) | |
| download | glibc-9469261cf1924d350feeec64d2c80cafbbdcdd4d.zip glibc-9469261cf1924d350feeec64d2c80cafbbdcdd4d.tar.gz glibc-9469261cf1924d350feeec64d2c80cafbbdcdd4d.tar.bz2 | |
x86: Only align destination to 1x VEC_SIZE in memset 4x loop
Current code aligns to 2x VEC_SIZE. Aligning to 2x has no affect on
performance other than potentially resulting in an additional
iteration of the loop.
1x maintains aligned stores (the only reason to align in this case)
and doesn't incur any unnecessary loop iterations.
Reviewed-by: Sunil K Pandey <skpgkp2@gmail.com>
Diffstat (limited to 'sysdeps/x86_64')
| -rw-r--r-- | sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S b/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S index 3d9ad49..0f0636b 100644 --- a/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S +++ b/sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S @@ -293,7 +293,7 @@ L(more_2x_vec): leaq (VEC_SIZE * 4)(%rax), %LOOP_REG #endif /* Align dst for loop. */ - andq $(VEC_SIZE * -2), %LOOP_REG + andq $(VEC_SIZE * -1), %LOOP_REG .p2align 4 L(loop): VMOVA %VMM(0), LOOP_4X_OFFSET(%LOOP_REG) |