Add optimized strncasecmp versions for x86-64.

1 files changed, 110 insertions, 59 deletions

diff --git a/sysdeps/x86_64/strcmp.S b/sysdeps/x86_64/strcmp.S
index 1b48f04172..5a4346be05 100644
--- a/sysdeps/x86_64/strcmp.S
+++ b/sysdeps/x86_64/strcmp.S
@@ -60,10 +60,26 @@
 # endif
 
 # define UPDATE_STRNCMP_COUNTER
+#elif defined USE_AS_STRNCASECMP_L
+# include "locale-defines.h"
+
+/* No support for strncasecmp outside libc so far since it is not needed.  */
+# ifdef NOT_IN_lib
+#  error "strncasecmp_l not implemented so far"
+# endif
+
+# define UPDATE_STRNCMP_COUNTER				\
+	/* calculate left number to compare */		\
+	lea	-16(%rcx, %r11), %r9;			\
+	cmp	%r9, %r11;				\
+	jb	LABEL(strcmp_exitz);			\
+	test	%r9, %r9;				\
+	je	LABEL(strcmp_exitz);			\
+	mov	%r9, %r11
 #else
 # define UPDATE_STRNCMP_COUNTER
 # ifndef STRCMP
-#  define STRCMP strcmp
+#  define STRCMP strncasecmp
 # endif
 #endif
 
@@ -79,7 +95,7 @@
 #  define END2(name) END (name)
 # endif
 
-	ENTRY2 (__strcasecmp)
+ENTRY2 (__strcasecmp)
 	movq	__libc_tsd_LOCALE@gottpoff(%rip),%rax
 	movq	%fs:(%rax),%rdx
 
@@ -92,6 +108,25 @@ weak_alias (__strcasecmp, strcasecmp)
 libc_hidden_def (__strcasecmp)
 # endif
 	/* FALLTHROUGH to strcasecmp_l.  */
+#elif defined USE_AS_STRNCASECMP_L
+# ifndef ENTRY2
+#  define ENTRY2(name) ENTRY (name)
+#  define END2(name) END (name)
+# endif
+
+ENTRY2 (__strncasecmp)
+	movq	__libc_tsd_LOCALE@gottpoff(%rip),%rax
+	movq	%fs:(%rax),%r10
+
+	// XXX 5 byte should be before the function
+	/* 5-byte NOP.  */
+	.byte	0x0f,0x1f,0x44,0x00,0x00
+END2 (__strncasecmp)
+# ifndef NO_NOLOCALE_ALIAS
+weak_alias (__strncasecmp, strncasecmp)
+libc_hidden_def (__strncasecmp)
+# endif
+	/* FALLTHROUGH to strncasecmp_l.  */
 #endif
 
 ENTRY (BP_SYM (STRCMP))
@@ -124,12 +159,22 @@ END (BP_SYM (STRCMP))
 #  endif
 	testl	$0, 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
+	   with encodings not matching ASCII for single bytes.  */
+#  if LOCALE_T___LOCALES != 0 || LC_CTYPE != 0
+	movq	LOCALE_T___LOCALES+LC_CTYPE*8(%r10), %rax
+#  else
+	movq	(%r10), %rax
+#  endif
+	testl	$0, LOCALE_DATA_VALUES+_NL_CTYPE_NONASCII_CASE*SIZEOF_VALUES(%rax)
+	jne	__strncasecmp_l_nonascii
 # endif
 
 /*
  * This implementation uses SSE to compare up to 16 bytes at a time.
  */
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	test	%rdx, %rdx
 	je	LABEL(strcmp_exitz)
 	cmp	$1, %rdx
@@ -141,7 +186,7 @@ END (BP_SYM (STRCMP))
 /* Use 64bit AND here to avoid long NOP padding.  */
 	and	$0x3f, %rcx		/* rsi alignment in cache line */
 	and	$0x3f, %rax		/* rdi alignment in cache line */
-# ifdef USE_AS_STRCASECMP_L
+# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
 	.section .rodata.cst16,"aM",@progbits,16
 	.align 16
 .Lbelowupper:
@@ -155,11 +200,11 @@ END (BP_SYM (STRCMP))
 	.quad	0x2020202020202020
 	.previous
 	movdqa	.Lbelowupper(%rip), %xmm5
-# define UCLOW_reg %xmm5
+#  define UCLOW_reg %xmm5
 	movdqa	.Ltopupper(%rip), %xmm6
-# define UCHIGH_reg %xmm6
+#  define UCHIGH_reg %xmm6
 	movdqa	.Ltouppermask(%rip), %xmm7
-# define LCQWORD_reg %xmm7
+#  define LCQWORD_reg %xmm7
 # endif
 	cmp	$0x30, %ecx
 	ja	LABEL(crosscache)	/* rsi: 16-byte load will cross cache line */
@@ -169,7 +214,7 @@ END (BP_SYM (STRCMP))
 	movlpd	(%rsi), %xmm2
 	movhpd	8(%rdi), %xmm1
 	movhpd	8(%rsi), %xmm2
-# ifdef USE_AS_STRCASECMP_L
+# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
 #  define TOLOWER(reg1, reg2) \
 	movdqa	reg1, %xmm8;					\
 	movdqa	UCHIGH_reg, %xmm9;				\
@@ -196,7 +241,7 @@ END (BP_SYM (STRCMP))
 	pmovmskb %xmm1, %edx
 	sub	$0xffff, %edx		/* if first 16 bytes are same, edx == 0xffff */
 	jnz	LABEL(less16bytes)	/* If not, find different value or null char */
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)	/* finish comparision */
 # endif
@@ -241,7 +286,7 @@ LABEL(ashr_0):
 	movdqa	(%rsi), %xmm1
 	pxor	%xmm0, %xmm0			/* clear %xmm0 for null char check */
 	pcmpeqb	%xmm1, %xmm0			/* Any null chars? */
-# ifndef USE_AS_STRCASECMP_L
+# if !defined USE_AS_STRCASECMP_L && !defined USE_AS_STRNCASECMP_L
 	pcmpeqb	(%rdi), %xmm1			/* compare 16 bytes for equality */
 # else
 	movdqa	(%rdi), %xmm2
@@ -280,7 +325,7 @@ LABEL(loop_ashr_0):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)		/* mismatch or null char seen */
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -295,7 +340,7 @@ LABEL(loop_ashr_0):
 	pmovmskb %xmm1, %edx
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -363,7 +408,7 @@ LABEL(gobble_ashr_1):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -393,7 +438,7 @@ LABEL(gobble_ashr_1):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -412,7 +457,7 @@ LABEL(nibble_ashr_1):
 	test	$0xfffe, %edx
 	jnz	LABEL(ashr_1_exittail)	/* find null char*/
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$14, %r11
 	jbe	LABEL(ashr_1_exittail)
 # endif
@@ -493,7 +538,7 @@ LABEL(gobble_ashr_2):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -524,7 +569,7 @@ LABEL(gobble_ashr_2):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -540,7 +585,7 @@ LABEL(nibble_ashr_2):
 	test	$0xfffc, %edx
 	jnz	LABEL(ashr_2_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$13, %r11
 	jbe	LABEL(ashr_2_exittail)
 # endif
@@ -618,7 +663,7 @@ LABEL(gobble_ashr_3):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -649,7 +694,7 @@ LABEL(gobble_ashr_3):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -665,7 +710,7 @@ LABEL(nibble_ashr_3):
 	test	$0xfff8, %edx
 	jnz	LABEL(ashr_3_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$12, %r11
 	jbe	LABEL(ashr_3_exittail)
 # endif
@@ -743,7 +788,7 @@ LABEL(gobble_ashr_4):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -774,7 +819,7 @@ LABEL(gobble_ashr_4):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -790,7 +835,7 @@ LABEL(nibble_ashr_4):
 	test	$0xfff0, %edx
 	jnz	LABEL(ashr_4_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$11, %r11
 	jbe	LABEL(ashr_4_exittail)
 # endif
@@ -868,7 +913,7 @@ LABEL(gobble_ashr_5):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -899,7 +944,7 @@ LABEL(gobble_ashr_5):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -915,7 +960,7 @@ LABEL(nibble_ashr_5):
 	test	$0xffe0, %edx
 	jnz	LABEL(ashr_5_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$10, %r11
 	jbe	LABEL(ashr_5_exittail)
 # endif
@@ -993,7 +1038,7 @@ LABEL(gobble_ashr_6):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1024,7 +1069,7 @@ LABEL(gobble_ashr_6):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1040,7 +1085,7 @@ LABEL(nibble_ashr_6):
 	test	$0xffc0, %edx
 	jnz	LABEL(ashr_6_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$9, %r11
 	jbe	LABEL(ashr_6_exittail)
 # endif
@@ -1118,7 +1163,7 @@ LABEL(gobble_ashr_7):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1149,7 +1194,7 @@ LABEL(gobble_ashr_7):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1165,7 +1210,7 @@ LABEL(nibble_ashr_7):
 	test	$0xff80, %edx
 	jnz	LABEL(ashr_7_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$8, %r11
 	jbe	LABEL(ashr_7_exittail)
 # endif
@@ -1243,7 +1288,7 @@ LABEL(gobble_ashr_8):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1274,7 +1319,7 @@ LABEL(gobble_ashr_8):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1290,7 +1335,7 @@ LABEL(nibble_ashr_8):
 	test	$0xff00, %edx
 	jnz	LABEL(ashr_8_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$7, %r11
 	jbe	LABEL(ashr_8_exittail)
 # endif
@@ -1368,7 +1413,7 @@ LABEL(gobble_ashr_9):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1399,7 +1444,7 @@ LABEL(gobble_ashr_9):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1415,7 +1460,7 @@ LABEL(nibble_ashr_9):
 	test	$0xfe00, %edx
 	jnz	LABEL(ashr_9_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$6, %r11
 	jbe	LABEL(ashr_9_exittail)
 # endif
@@ -1493,7 +1538,7 @@ LABEL(gobble_ashr_10):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1524,7 +1569,7 @@ LABEL(gobble_ashr_10):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1540,7 +1585,7 @@ LABEL(nibble_ashr_10):
 	test	$0xfc00, %edx
 	jnz	LABEL(ashr_10_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$5, %r11
 	jbe	LABEL(ashr_10_exittail)
 # endif
@@ -1618,7 +1663,7 @@ LABEL(gobble_ashr_11):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1649,7 +1694,7 @@ LABEL(gobble_ashr_11):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1665,7 +1710,7 @@ LABEL(nibble_ashr_11):
 	test	$0xf800, %edx
 	jnz	LABEL(ashr_11_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$4, %r11
 	jbe	LABEL(ashr_11_exittail)
 # endif
@@ -1743,7 +1788,7 @@ LABEL(gobble_ashr_12):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1774,7 +1819,7 @@ LABEL(gobble_ashr_12):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1790,7 +1835,7 @@ LABEL(nibble_ashr_12):
 	test	$0xf000, %edx
 	jnz	LABEL(ashr_12_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$3, %r11
 	jbe	LABEL(ashr_12_exittail)
 # endif
@@ -1868,7 +1913,7 @@ LABEL(gobble_ashr_13):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1899,7 +1944,7 @@ LABEL(gobble_ashr_13):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -1915,7 +1960,7 @@ LABEL(nibble_ashr_13):
 	test	$0xe000, %edx
 	jnz	LABEL(ashr_13_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$2, %r11
 	jbe	LABEL(ashr_13_exittail)
 # endif
@@ -1993,7 +2038,7 @@ LABEL(gobble_ashr_14):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -2024,7 +2069,7 @@ LABEL(gobble_ashr_14):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP | defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -2040,7 +2085,7 @@ LABEL(nibble_ashr_14):
 	test	$0xc000, %edx
 	jnz	LABEL(ashr_14_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	cmp	$1, %r11
 	jbe	LABEL(ashr_14_exittail)
 # endif
@@ -2120,7 +2165,7 @@ LABEL(gobble_ashr_15):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -2151,7 +2196,7 @@ LABEL(gobble_ashr_15):
 	sub	$0xffff, %edx
 	jnz	LABEL(exit)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	$16, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
@@ -2167,7 +2212,7 @@ LABEL(nibble_ashr_15):
 	test	$0x8000, %edx
 	jnz	LABEL(ashr_15_exittail)
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	test	%r11, %r11
 	je	LABEL(ashr_15_exittail)
 # endif
@@ -2205,14 +2250,14 @@ LABEL(ret):
 LABEL(less16bytes):
 	bsf	%rdx, %rdx		/* find and store bit index in %rdx */
 
-# ifdef USE_AS_STRNCMP
+# if defined USE_AS_STRNCMP || defined USE_AS_STRNCASECMP_L
 	sub	%rdx, %r11
 	jbe	LABEL(strcmp_exitz)
 # endif
 	movzbl	(%rsi, %rdx), %ecx
 	movzbl	(%rdi, %rdx), %eax
 
-# ifdef USE_AS_STRCASECMP_L
+# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
 	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
 	movl	(%rdx,%rcx,4), %ecx
 	movl	(%rdx,%rax,4), %eax
@@ -2230,6 +2275,12 @@ LABEL(Byte0):
 	movzx	(%rsi), %ecx
 	movzx	(%rdi), %eax
 
+# if defined USE_AS_STRCASECMP_L || defined USE_AS_STRNCASECMP_L
+	leaq	_nl_C_LC_CTYPE_tolower+128*4(%rip), %rdx
+	movl	(%rdx,%rcx,4), %ecx
+	movl	(%rdx,%rax,4), %eax
+# endif
+
 	sub	%ecx, %eax
 	ret
 END (BP_SYM (STRCMP))