Simplify SSE tests

There is no need to test OS support for SSE2, and later. If plain SSE
works, the OS preserves the XMM registers and that's all we care.

src/misc/cpu.c

@@ -99,36 +99,6 @@ VLC_SSE static void SSE_test (void)
     asm volatile ("xorps %%xmm0,%%xmm0\n" : : : "xmm0", "xmm1");
 }
 #endif
-#if defined (CAN_COMPILE_SSE2) && !defined (__SSE2__)
-VLC_SSE static void SSE2_test (void)
-{
-    asm volatile ("movupd %%xmm0, %%xmm0\n" : : : "xmm0", "xmm1");
-}
-#endif
-#if defined (CAN_COMPILE_SSE3) && !defined (__SSE3__)
-VLC_SSE static void SSE3_test (void)
-{
-    asm volatile ("movsldup %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
-}
-#endif
-#if defined (CAN_COMPILE_SSSE3) && !defined (__SSSE3__)
-VLC_SSE static void SSSE3_test (void)
-{
-    asm volatile ("pabsw %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
-}
-#endif
-#if defined (CAN_COMPILE_SSE4_1) && !defined (__SSE4_1__)
-VLC_SSE static void SSE4_1_test (void)
-{
-    asm volatile ("pmaxsb %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
-}
-#endif
-#if defined (CAN_COMPILE_SSE4_2) && !defined (__SSE4_2__)
-VLC_SSE static void SSE4_2_test (void)
-{
-    asm volatile ("pcmpgtq %%xmm1, %%xmm0\n" : : : "xmm0", "xmm1");
-}
-#endif
 #if defined (CAN_COMPILE_3DNOW) && !defined (__3dNOW__)
 VLC_MMX static void ThreeD_Now_test (void)
 {
@@ -224,38 +194,24 @@ void vlc_CPU_init (void)
     i_capabilities |= VLC_CPU_MMX;
 
     if( i_edx & 0x02000000 )
-    {
         i_capabilities |= VLC_CPU_MMXEXT;
-#   ifdef CAN_COMPILE_SSE
-        if (vlc_CPU_check ("SSE", SSE_test))
-            i_capabilities |= VLC_CPU_SSE;
+# if defined (CAN_COMPILE_SSE) && !defined (__SSE__)
+    if (( i_edx & 0x02000000 ) && vlc_CPU_check ("SSE", SSE_test))
 # endif
-    }
-
-# if defined (CAN_COMPILE_SSE2)
-    if ((i_edx & 0x04000000) && vlc_CPU_check ("SSE2", SSE2_test))
+    {
+        /*if( i_edx & 0x02000000 )*/
+            i_capabilities |= VLC_CPU_SSE;
+        if (i_edx & 0x04000000)
             i_capabilities |= VLC_CPU_SSE2;
-# endif
-
-# if defined (CAN_COMPILE_SSE3)
-    if ((i_ecx & 0x00000001) && vlc_CPU_check ("SSE3", SSE3_test))
+        if (i_ecx & 0x00000001)
             i_capabilities |= VLC_CPU_SSE3;
-# endif
-
-# if defined (CAN_COMPILE_SSSE3)
-    if ((i_ecx & 0x00000200) && vlc_CPU_check ("SSSE3", SSSE3_test))
+        if (i_ecx & 0x00000200)
             i_capabilities |= VLC_CPU_SSSE3;
-# endif
-
-# if defined (CAN_COMPILE_SSE4_1)
-    if ((i_ecx & 0x00080000) && vlc_CPU_check ("SSE4.1", SSE4_1_test))
+        if (i_ecx & 0x00080000)
             i_capabilities |= VLC_CPU_SSE4_1;
-# endif
-
-# if defined (CAN_COMPILE_SSE4_2)
-    if ((i_ecx & 0x00100000) && vlc_CPU_check ("SSE4.2", SSE4_2_test))
+        if (i_ecx & 0x00100000)
             i_capabilities |= VLC_CPU_SSE4_2;
-# endif
+    }
 
     /* test for additional capabilities */
     cpuid( 0x80000000 );