[Rawstudio-commit] r3837 - trunk/librawstudio

[Klaus Post]

Author: post
Date: 2011-03-06 10:00:15 +0100 (Sun, 06 Mar 2011)
New Revision: 3837

Modified:
   trunk/librawstudio/rs-utils.c
   trunk/librawstudio/x86-cpu.h
Log:
Detect AVX extensions and OS support.

Modified: trunk/librawstudio/rs-utils.c
===================================================================
--- trunk/librawstudio/rs-utils.c       2011-02-27 23:46:47 UTC (rev 3836)
+++ trunk/librawstudio/rs-utils.c       2011-03-06 09:00:15 UTC (rev 3837)
@@ -198,6 +198,9 @@
 
 #if defined (__i386__) || defined (__x86_64__)
 
+#define xgetbv(index,eax,edx)                                   \
+   __asm__ (".byte 0x0f, 0x01, 0xd0" : "=a"(eax), "=d"(edx) : "c" (index))
+
 /**
  * Detect cpu features
  * @return A bitmask of @RSCpuFlags
@@ -280,7 +283,13 @@
                                if (ecx & 0x00080000)
                                        cpuflags |= RS_CPU_FLAG_SSE4_1;
                                if (ecx & 0x00100000)
-                                       cpuflags |= RS_CPU_FLAG_SSE4_2;         
+                                       cpuflags |= RS_CPU_FLAG_SSE4_2;
+                               if ((ecx & 0x18000000) == 0x18000000)
+                               {
+                                       xgetbv(0, eax, edx);
+                                               if ((eax & 0x6) == 0x6)
+                                                       cpuflags |= 
RS_CPU_FLAG_AVX;
+                               }
                        }
 
                        /* Is there extensions */
@@ -319,6 +328,7 @@
        report("SSSE3",RS_CPU_FLAG_SSSE3);
        report("SSE4.1",RS_CPU_FLAG_SSE4_1);
        report("SSE4.2",RS_CPU_FLAG_SSE4_2);
+       report("AVX",RS_CPU_FLAG_AVX);
 #undef report
 
        return(stored_cpuflags);

Modified: trunk/librawstudio/x86-cpu.h
===================================================================
--- trunk/librawstudio/x86-cpu.h        2011-02-27 23:46:47 UTC (rev 3836)
+++ trunk/librawstudio/x86-cpu.h        2011-03-06 09:00:15 UTC (rev 3837)
@@ -12,7 +12,8 @@
        RS_CPU_FLAG_SSE3 =  1<<7,
        RS_CPU_FLAG_SSSE3 =  1<<8,
        RS_CPU_FLAG_SSE4_1 =  1<<9,
-       RS_CPU_FLAG_SSE4_2 =  1<<10
+       RS_CPU_FLAG_SSE4_2 =  1<<10,
+       RS_CPU_FLAG_AVX =  1<<11
 } RSCpuFlags;
 
 #if defined(__x86_64__)


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