29 lines
993 B
Diff
29 lines
993 B
Diff
commit d201c59177b98946d7f80145e7b4d02991d04805
|
|
Author: Noah Goldstein <goldstein.w.n@gmail.com>
|
|
Date: Fri Jun 24 09:42:12 2022 -0700
|
|
|
|
x86: Align entry for memrchr to 64-bytes.
|
|
|
|
The function was tuned around 64-byte entry alignment and performs
|
|
better for all sizes with it.
|
|
|
|
As well different code boths where explicitly written to touch the
|
|
minimum number of cache line i.e sizes <= 32 touch only the entry
|
|
cache line.
|
|
|
|
(cherry picked from commit 227afaa67213efcdce6a870ef5086200f1076438)
|
|
|
|
diff --git a/sysdeps/x86_64/multiarch/memrchr-avx2.S b/sysdeps/x86_64/multiarch/memrchr-avx2.S
|
|
index 5f8e0be18cfe4fad..edd8180ba1ede9a5 100644
|
|
--- a/sysdeps/x86_64/multiarch/memrchr-avx2.S
|
|
+++ b/sysdeps/x86_64/multiarch/memrchr-avx2.S
|
|
@@ -35,7 +35,7 @@
|
|
# define VEC_SIZE 32
|
|
# define PAGE_SIZE 4096
|
|
.section SECTION(.text), "ax", @progbits
|
|
-ENTRY(MEMRCHR)
|
|
+ENTRY_P2ALIGN(MEMRCHR, 6)
|
|
# ifdef __ILP32__
|
|
/* Clear upper bits. */
|
|
and %RDX_LP, %RDX_LP
|