Mesa (master): mesa/x86: add SSE4.1 runtime detection.

[Matt Turner]

Module: Mesa
Branch: master
Commit: a2fb71e23bced3f3585e91726590efe6034a10ed
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a2fb71e23bced3f3585e91726590efe6034a10ed

Author: Matt Atwood <matthew.s.atwood at intel.com>
Date:   Fri May  2 09:44:44 2014 -0700

mesa/x86: add SSE4.1 runtime detection.

Add a bit to _mesa_x86_features for SSE 4.1, along with macros to query.

Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 src/mesa/x86/common_x86.c          |    6 ++++++
 src/mesa/x86/common_x86_features.h |    4 ++++
 2 files changed, 10 insertions(+)

diff --git a/src/mesa/x86/common_x86.c b/src/mesa/x86/common_x86.c
index a91f07e..08b1558 100644
--- a/src/mesa/x86/common_x86.c
+++ b/src/mesa/x86/common_x86.c
@@ -241,6 +241,7 @@ _mesa_get_x86_features(void)
 
        /* get cpu features */
        cpu_features = _mesa_x86_cpuid_edx(1);
+       cpu_features_ecx = _mesa_x86_cpuid_ecx(1);
 
        if (cpu_features & X86_CPU_FPU)
 	   _mesa_x86_cpu_features |= X86_FEATURE_FPU;
@@ -257,6 +258,8 @@ _mesa_get_x86_features(void)
 	   _mesa_x86_cpu_features |= X86_FEATURE_XMM;
        if (cpu_features & X86_CPU_XMM2)
 	   _mesa_x86_cpu_features |= X86_FEATURE_XMM2;
+       if (cpu_features & x86_CPU_SSE4_1)
+	   _mesa_x86_features |= X86_FEATURE_SSE4_1;
 #endif
 
        /* query extended cpu features */
@@ -341,6 +344,9 @@ _mesa_get_x86_features(void)
    _mesa_x86_cpu_features |= X86_FEATURE_XMM | X86_FEATURE_XMM2;
 
    __get_cpuid(1, &eax, &ebx, &ecx, &edx);
+
+   if (ecx & bit_SSE4_1)
+      _mesa_x86_cpu_features |= X86_FEATURE_SSE4_1;
 #endif /* USE_X86_ASM */
 
    (void) detection_debug;
diff --git a/src/mesa/x86/common_x86_features.h b/src/mesa/x86/common_x86_features.h
index 8625484..66f2cf6 100644
--- a/src/mesa/x86/common_x86_features.h
+++ b/src/mesa/x86/common_x86_features.h
@@ -43,6 +43,7 @@
 #define X86_FEATURE_XMM2	(1<<6)
 #define X86_FEATURE_3DNOWEXT	(1<<7)
 #define X86_FEATURE_3DNOW	(1<<8)
+#define X86_FEATURE_SSE4_1	(1<<9)
 
 /* standard X86 CPU features */
 #define X86_CPU_FPU		(1<<0)
@@ -50,6 +51,8 @@
 #define X86_CPU_MMX		(1<<23)
 #define X86_CPU_XMM		(1<<25)
 #define X86_CPU_XMM2		(1<<26)
+/* ECX. */
+#define X86_CPU_SSE4_1		(1<<19)
 
 /* extended X86 CPU features */
 #define X86_CPUEXT_MMX_EXT	(1<<22)
@@ -62,6 +65,7 @@
 #define cpu_has_xmm2		(_mesa_x86_cpu_features & X86_FEATURE_XMM2)
 #define cpu_has_3dnow		(_mesa_x86_cpu_features & X86_FEATURE_3DNOW)
 #define cpu_has_3dnowext	(_mesa_x86_cpu_features & X86_FEATURE_3DNOWEXT)
+#define cpu_has_sse4_1		(_mesa_x86_cpu_features & X86_FEATURE_SSE4_1)
 
 #endif