x86: Use `testb` for case-locale check in str{n}casecmp-sse2

`testb` saves a bit of code size is the imm-operand can be encoded
1-bytes.

Tested on x86-64.

diff --git a/sysdeps/x86_64/multiarch/strcmp-sse2.S b/sysdeps/x86_64/multiarch/strcmp-sse2.S
index 3c69fc1df1b0031fc226243096a54bbe8a184488..a975c924d8bff05bc7c1b196fb581b7ebe2869f1 100644 (file)
--- a/sysdeps/x86_64/multiarch/strcmp-sse2.S
+++ b/sysdeps/x86_64/multiarch/strcmp-sse2.S
@@ -104,7 +104,7 @@ ENTRY (STRCMP)
 #  else
        mov     (%rdx), %RAX_LP
 #  endif
-       testl   $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
+       testb   $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
        jne     __strcasecmp_l_nonascii
 # elif defined USE_AS_STRNCASECMP_L
        /* We have to fall back on the C implementation for locales
@@ -114,7 +114,7 @@ ENTRY (STRCMP)
 #  else
        mov     (%rcx), %RAX_LP
 #  endif
-       testl   $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
+       testb   $1, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
        jne     __strncasecmp_l_nonascii
 # endif