From 0fda545d5f9253d7b2b7832c37cd8f57c5619da4 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Fri, 7 Aug 2009 22:51:02 -0700
Subject: Add SSSE3-optimized implementation of str{,n}cmp for x86-64.

---
 sysdeps/x86_64/multiarch/strcmp.S | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

(limited to 'sysdeps/x86_64/multiarch/strcmp.S')

diff --git a/sysdeps/x86_64/multiarch/strcmp.S b/sysdeps/x86_64/multiarch/strcmp.S
index 1a315737af..05adf1e2e6 100644
--- a/sysdeps/x86_64/multiarch/strcmp.S
+++ b/sysdeps/x86_64/multiarch/strcmp.S
@@ -34,6 +34,7 @@
 	mov	%r9, %r11
 
 #define STRCMP_SSE42	__strncmp_sse42
+#define STRCMP_SSSE3	__strncmp_ssse3
 #define STRCMP_SSE2	__strncmp_sse2
 #define __GI_STRCMP	__GI_strncmp
 #else
@@ -41,6 +42,7 @@
 #ifndef STRCMP
 #define STRCMP		strcmp
 #define STRCMP_SSE42	__strcmp_sse42
+#define STRCMP_SSSE3	__strcmp_ssse3
 #define STRCMP_SSE2	__strcmp_sse2
 #define __GI_STRCMP	__GI_strcmp
 #endif
@@ -60,10 +62,14 @@ ENTRY(STRCMP)
 	cmpl	$0, __cpu_features+KIND_OFFSET(%rip)
 	jne	1f
 	call	__init_cpu_features
-1:	leaq	STRCMP_SSE2(%rip), %rax
-	testl	$(1<<20), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip)
-	jz	2f
+1:
 	leaq	STRCMP_SSE42(%rip), %rax
+	testl	$(1<<20), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip)
+	jnz	2f
+	leaq	STRCMP_SSSE3(%rip), %rax
+	testl	$(1<<9), __cpu_features+CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET(%rip)
+	jnz	2f
+	leaq	STRCMP_SSE2(%rip), %rax
 2:	ret
 END(STRCMP)
 
-- 
cgit 1.4.1