openal/patches/openal-20060211-mmx.patch

--- src/arch/i386/x86_floatmul.c
+++ src/arch/i386/x86_floatmul.c
@@ -27,6 +27,7 @@
 /* MMX routine needs 16 */
 #define SCALING_POWER  16
 #define SCALING_FACTOR (1 << SCALING_POWER)
+#define MIN_ENTER_SIMD_LEN 48
 
 void _alFloatMul(ALshort *bpt, ALfloat sa, ALuint len);
 
@@ -34,6 +35,8 @@
 	ALint scaled_sa = sa * SCALING_FACTOR;
 	ALint iter;
 	
+	if (len < MIN_ENTER_SIMD_LEN)
+		goto skip_simd;
 #ifdef __MMX__
 	if (_alHaveMMX()) {
 		union {
@@ -93,6 +96,7 @@
 		__builtin_ia32_emms();
 	}
 #endif /* __MMX__ */
+skip_simd:
 
 	while(len--) {
 		iter = *bpt;
1	--- src/arch/i386/x86_floatmul.c
2	+++ src/arch/i386/x86_floatmul.c
3	@@ -27,6 +27,7 @@
4	/* MMX routine needs 16 */
5	#define SCALING_POWER 16
6	#define SCALING_FACTOR (1 << SCALING_POWER)
7	+#define MIN_ENTER_SIMD_LEN 48
8
9	void _alFloatMul(ALshort *bpt, ALfloat sa, ALuint len);
10
11	@@ -34,6 +35,8 @@
12	ALint scaled_sa = sa * SCALING_FACTOR;
13	ALint iter;
14
15	+ if (len < MIN_ENTER_SIMD_LEN)
16	+ goto skip_simd;
17	#ifdef __MMX__
18	if (_alHaveMMX()) {
19	union {
20	@@ -93,6 +96,7 @@
21	__builtin_ia32_emms();
22	}
23	#endif /* __MMX__ */
24	+skip_simd:
25
26	while(len--) {
27	iter = *bpt;