From: Fangrui Song <maskray@google.com>
Date: Wed, 3 Nov 2021 03:59:52 +0000 (-0700)
Subject: x86-64: Replace movzx with movzbl
X-Git-Tag: glibc-2.35~361
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6720d36b6623c5e48c070d86acf61198b33e144e;p=platform%2Fupstream%2Fglibc.git

x86-64: Replace movzx with movzbl

Clang cannot assemble movzx in the AT&T dialect mode.

../sysdeps/x86_64/strcmp.S:2232:16: error: invalid operand for instruction
 movzx (%rsi), %ecx
               ^~~~

Change movzx to movzbl, which follows the AT&T dialect and is used
elsewhere in the file.

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
---

diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S
index 617d3a3..be1ddb3 100644
--- a/sysdeps/x86_64/multiarch/strcmp-sse42.S
+++ b/sysdeps/x86_64/multiarch/strcmp-sse42.S
@@ -1770,8 +1770,8 @@ LABEL(strcmp_exitz):
 	.p2align 4
 	// XXX Same as code above
 LABEL(Byte0):
-	movzx	(%rsi), %ecx
-	movzx	(%rdi), %eax
+	movzbl	(%rsi), %ecx
+	movzbl	(%rdi), %eax
 
 #if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
 	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
diff --git a/sysdeps/x86_64/strcmp.S b/sysdeps/x86_64/strcmp.S
index c7cbe40..bfe83ab 100644
--- a/sysdeps/x86_64/strcmp.S
+++ b/sysdeps/x86_64/strcmp.S
@@ -2229,8 +2229,8 @@ LABEL(strcmp_exitz):
 
 	.p2align 4
 LABEL(Byte0):
-	movzx	(%rsi), %ecx
-	movzx	(%rdi), %eax
+	movzbl	(%rsi), %ecx
+	movzbl	(%rdi), %eax
 
 #if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
 	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx