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commit 2e64237a8744dd50f9222293275fa52e7248ff76
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Author: Fangrui Song <maskray@google.com>
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Date: Tue Nov 2 20:59:52 2021 -0700
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x86-64: Replace movzx with movzbl
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Clang cannot assemble movzx in the AT&T dialect mode.
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../sysdeps/x86_64/strcmp.S:2232:16: error: invalid operand for instruction
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movzx (%rsi), %ecx
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^~~~
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Change movzx to movzbl, which follows the AT&T dialect and is used
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elsewhere in the file.
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Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
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(cherry picked from commit 6720d36b6623c5e48c070d86acf61198b33e144e)
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diff --git a/sysdeps/x86_64/multiarch/strcmp-sse42.S b/sysdeps/x86_64/multiarch/strcmp-sse42.S
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index bc19547b09639071..6197a723b9e0606e 100644
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--- a/sysdeps/x86_64/multiarch/strcmp-sse42.S
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+++ b/sysdeps/x86_64/multiarch/strcmp-sse42.S
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@@ -1771,8 +1771,8 @@ LABEL(strcmp_exitz):
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.p2align 4
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// XXX Same as code above
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LABEL(Byte0):
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- movzx (%rsi), %ecx
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- movzx (%rdi), %eax
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+ movzbl (%rsi), %ecx
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+ movzbl (%rdi), %eax
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
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diff --git a/sysdeps/x86_64/strcmp.S b/sysdeps/x86_64/strcmp.S
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index 824e648230a15739..7f8a1bc756f86aee 100644
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--- a/sysdeps/x86_64/strcmp.S
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+++ b/sysdeps/x86_64/strcmp.S
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@@ -2232,8 +2232,8 @@ LABEL(strcmp_exitz):
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.p2align 4
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LABEL(Byte0):
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- movzx (%rsi), %ecx
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- movzx (%rdi), %eax
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+ movzbl (%rsi), %ecx
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+ movzbl (%rdi), %eax
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#if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
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leaq _nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
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