update to glibc-2.28-251.2.src.rpm

Signed-off-by: Zhao Hang <wb-zh951434@alibaba-inc.com>

glibc-RHEL-15696-100.patch

@@ -0,0 +1,257 @@
+From 244b415d386487521882debb845a040a4758cb18 Mon Sep 17 00:00:00 2001
+From: Noah Goldstein <goldstein.w.n@gmail.com>
+Date: Fri, 25 Mar 2022 17:13:33 -0500
+Subject: [PATCH] x86: Small improvements for wcslen
+Content-type: text/plain; charset=UTF-8
+
+Just a few QOL changes.
+    1. Prefer `add` > `lea` as it has high execution units it can run
+       on.
+    2. Don't break macro-fusion between `test` and `jcc`
+    3. Reduce code size by removing gratuitous padding bytes (-90
+       bytes).
+
+geometric_mean(N=20) of all benchmarks New / Original: 0.959
+
+All string/memory tests pass.
+Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
+---
+ sysdeps/x86_64/wcslen.S | 86 ++++++++++++++++++++---------------------
+ 1 file changed, 41 insertions(+), 45 deletions(-)
+
+diff --git a/sysdeps/x86_64/wcslen.S b/sysdeps/x86_64/wcslen.S
+index 9f5f7232..254bb030 100644
+--- a/sysdeps/x86_64/wcslen.S
++++ b/sysdeps/x86_64/wcslen.S
+@@ -41,82 +41,82 @@ ENTRY (__wcslen)
+ 	pxor	%xmm0, %xmm0
+ 
+ 	lea	32(%rdi), %rax
+-	lea	16(%rdi), %rcx
++	addq	$16, %rdi
+ 	and	$-16, %rax
+ 
+ 	pcmpeqd	(%rax), %xmm0
+ 	pmovmskb %xmm0, %edx
+ 	pxor	%xmm1, %xmm1
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm1
+ 	pmovmskb %xmm1, %edx
+ 	pxor	%xmm2, %xmm2
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm2
+ 	pmovmskb %xmm2, %edx
+ 	pxor	%xmm3, %xmm3
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm3
+ 	pmovmskb %xmm3, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm0
+ 	pmovmskb %xmm0, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm1
+ 	pmovmskb %xmm1, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm2
+ 	pmovmskb %xmm2, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm3
+ 	pmovmskb %xmm3, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm0
+ 	pmovmskb %xmm0, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm1
+ 	pmovmskb %xmm1, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm2
+ 	pmovmskb %xmm2, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	(%rax), %xmm3
+ 	pmovmskb %xmm3, %edx
++	addq	$16, %rax
+ 	test	%edx, %edx
+-	lea	16(%rax), %rax
+ 	jnz	L(exit)
+ 
+ 	and	$-0x40, %rax
+@@ -133,104 +133,100 @@ L(aligned_64_loop):
+ 	pminub	%xmm0, %xmm2
+ 	pcmpeqd	%xmm3, %xmm2
+ 	pmovmskb %xmm2, %edx
++	addq	$64, %rax
+ 	test	%edx, %edx
+-	lea	64(%rax), %rax
+ 	jz	L(aligned_64_loop)
+ 
+ 	pcmpeqd	-64(%rax), %xmm3
+ 	pmovmskb %xmm3, %edx
++    addq	$48, %rdi
+ 	test	%edx, %edx
+-	lea	48(%rcx), %rcx
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	%xmm1, %xmm3
+ 	pmovmskb %xmm3, %edx
++    addq	$-16, %rdi
+ 	test	%edx, %edx
+-	lea	-16(%rcx), %rcx
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	-32(%rax), %xmm3
+ 	pmovmskb %xmm3, %edx
++    addq	$-16, %rdi
+ 	test	%edx, %edx
+-	lea	-16(%rcx), %rcx
+ 	jnz	L(exit)
+ 
+ 	pcmpeqd	%xmm6, %xmm3
+ 	pmovmskb %xmm3, %edx
++    addq	$-16, %rdi
+ 	test	%edx, %edx
+-	lea	-16(%rcx), %rcx
+-	jnz	L(exit)
+-
+-	jmp	L(aligned_64_loop)
++	jz	L(aligned_64_loop)
+ 
+ 	.p2align 4
+ L(exit):
+-	sub	%rcx, %rax
++	sub	%rdi, %rax
+ 	shr	$2, %rax
+ 	test	%dl, %dl
+ 	jz	L(exit_high)
+ 
+-	mov	%dl, %cl
+-	and	$15, %cl
++	andl	$15, %edx
+ 	jz	L(exit_1)
+ 	ret
+ 
+-	.p2align 4
++	/* No align here. Naturally aligned % 16 == 1.  */
+ L(exit_high):
+-	mov	%dh, %ch
+-	and	$15, %ch
++	andl	$(15 << 8), %edx
+ 	jz	L(exit_3)
+ 	add	$2, %rax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_1):
+ 	add	$1, %rax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_3):
+ 	add	$3, %rax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail0):
+-	xor	%rax, %rax
++	xorl	%eax, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail1):
+-	mov	$1, %rax
++	movl	$1, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail2):
+-	mov	$2, %rax
++	movl	$2, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail3):
+-	mov	$3, %rax
++	movl	$3, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail4):
+-	mov	$4, %rax
++	movl	$4, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail5):
+-	mov	$5, %rax
++	movl	$5, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail6):
+-	mov	$6, %rax
++	movl	$6, %eax
+ 	ret
+ 
+-	.p2align 4
++	.p2align 3
+ L(exit_tail7):
+-	mov	$7, %rax
++	movl	$7, %eax
+ 	ret
+ 
+ END (__wcslen)
+-- 
+GitLab
+