x86: Use `testb` for case-locale check in str{n}casecmp-sse42

`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-sse4_2.S b/sysdeps/x86_64/multiarch/strcmp-sse4_2.S
index dc6fc90e14a07f5f7bdd869ecfd958f7152bd05a..6b540ff894b3ebdef7f4ede63cf83dac26923a68 100644 (file)
--- a/sysdeps/x86_64/multiarch/strcmp-sse4_2.S
+++ b/sysdeps/x86_64/multiarch/strcmp-sse4_2.S
@@ -119,7 +119,7 @@ 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
 # endif
 # ifdef USE_AS_STRNCASECMP_L
@@ -130,7 +130,7 @@ 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