#endif
#include <vlc_common.h>
+#include <vlc_cpu.h>
#include <sys/types.h>
#ifndef WIN32
#include <sys/sysctl.h>
#endif
-#if defined( __i386__ ) || defined( __x86_64__ ) \
- || defined( __ppc__ ) || defined( __ppc64__ )
+#if defined( __i386__ ) || defined( __x86_64__ ) || defined( __powerpc__ ) \
+ || defined( __ppc__ ) || defined( __ppc64__ ) || defined( __powerpc64__ )
static bool check_OS_capability( const char *psz_capability, pid_t pid )
{
#ifndef WIN32
*****************************************************************************/
uint32_t CPUCapabilities( void )
{
- uint32_t i_capabilities = CPU_CAPABILITY_NONE;
+ uint32_t i_capabilities = 0;
#if defined( __i386__ ) || defined( __x86_64__ )
unsigned int i_eax, i_ebx, i_ecx, i_edx;
: "a" ( reg ) \
: "cc" );
# endif
-
- i_capabilities |= CPU_CAPABILITY_FPU;
-
-# if defined( __i386__ )
+ /* Check if the OS really supports the requested instructions */
+# define check_capability(name, flag, code) \
+ do { \
+ pid_t pid = fork(); \
+ if( pid == 0 ) \
+ { \
+ __asm__ __volatile__ ( code : : ); \
+ exit(0); \
+ } \
+ if( check_OS_capability((name), pid )) \
+ i_capabilities |= (flag); \
+ } while(0)
+
+# if defined (__i386__) && !defined (__i486__) && !defined (__i586__) \
+ && !defined (__i686__) && !defined (__pentium4__) \
+ && !defined (__k6__) && !defined (__athlon__) && !defined (__k8__)
/* check if cpuid instruction is supported */
asm volatile ( "push %%ebx\n\t"
"pushf\n\t"
if( i_eax == i_ebx )
goto out;
-# else
- /* x86_64 supports cpuid instruction, so we dont need to check it */
-# endif
-
- i_capabilities |= CPU_CAPABILITY_486;
+# endif
/* the CPU supports the CPUID instruction - get its level */
cpuid( 0x00000000 );
+# if defined (__i386__) && !defined (__i586__) \
+ && !defined (__i686__) && !defined (__pentium4__) \
+ && !defined (__k6__) && !defined (__athlon__) && !defined (__k8__)
if( !i_eax )
goto out;
-
- /* FIXME: this isn't correct, since some 486s have cpuid */
- i_capabilities |= CPU_CAPABILITY_586;
+#endif
/* borrowed from mpeg2dec */
b_amd = ( i_ebx == 0x68747541 ) && ( i_ecx == 0x444d4163 )
/* test for the MMX flag */
cpuid( 0x00000001 );
-
+# if !defined (__MMX__)
if( ! (i_edx & 0x00800000) )
goto out;
-
+# endif
i_capabilities |= CPU_CAPABILITY_MMX;
+# if defined (__SSE__)
+ i_capabilities |= CPU_CAPABILITY_MMXEXT | CPU_CAPABILITY_SSE;
+# else
if( i_edx & 0x02000000 )
{
i_capabilities |= CPU_CAPABILITY_MMXEXT;
# ifdef CAN_COMPILE_SSE
- /* We test if OS supports the SSE instructions */
- pid_t pid = fork();
- if( pid == 0 )
- {
- /* Test a SSE instruction */
- __asm__ __volatile__ ( "xorps %%xmm0,%%xmm0\n" : : );
- exit(0);
- }
- if( check_OS_capability( "SSE", pid ) )
- i_capabilities |= CPU_CAPABILITY_SSE;
+ check_capability( "SSE", CPU_CAPABILITY_SSE,
+ "xorps %%xmm0,%%xmm0\n" );
# endif
}
+# endif
+# if defined (__SSE2__)
+ i_capabilities |= CPU_CAPABILITY_SSE2;
+# elif defined (CAN_COMPILE_SSE2)
if( i_edx & 0x04000000 )
- {
-# if defined(CAN_COMPILE_SSE)
- /* We test if OS supports the SSE2 instructions */
- pid_t pid = fork();
- if( pid == 0 )
- {
- /* Test a SSE2 instruction */
- __asm__ __volatile__ ( "movupd %%xmm0, %%xmm0\n" : : );
- exit(0);
- }
- if( check_OS_capability( "SSE2", pid ) )
- i_capabilities |= CPU_CAPABILITY_SSE2;
-# endif
- }
+ check_capability( "SSE2", CPU_CAPABILITY_SSE2,
+ "movupd %%xmm0, %%xmm0\n" );
+# endif
+
+# if defined (__SSE3__)
+ i_capabilities |= CPU_CAPABILITY_SSE3;
+# elif defined (CAN_COMPILE_SSE3)
+ if( i_ecx & 0x00000001 )
+ check_capability( "SSE3", CPU_CAPABILITY_SSE3,
+ "movsldup %%xmm1, %%xmm0\n" );
+# endif
+
+# if defined (__SSSE3__)
+ i_capabilities |= CPU_CAPABILITY_SSSE3;
+# elif defined (CAN_COMPILE_SSSE3)
+ if( i_ecx & 0x00000200 )
+ check_capability( "SSSE3", CPU_CAPABILITY_SSSE3,
+ "pabsw %%xmm1, %%xmm0\n" );
+# endif
+
+# if defined (__SSE4_1__)
+ i_capabilities |= CPU_CAPABILITY_SSE4_1;
+# elif defined (CAN_COMPILE_SSE4_1)
+ if( i_ecx & 0x00080000 )
+ check_capability( "SSE4.1", CPU_CAPABILITY_SSE4_1,
+ "pmaxsb %%xmm1, %%xmm0\n" );
+# endif
+
+# if defined (__SSE4_2__)
+ i_capabilities |= CPU_CAPABILITY_SSE4_2;
+# elif defined (CAN_COMPILE_SSE4_2)
+ if( i_ecx & 0x00100000 )
+ check_capability( "SSE4.2", CPU_CAPABILITY_SSE4_2,
+ "pcmpgtq %%xmm1, %%xmm0\n" );
+# endif
/* test for additional capabilities */
cpuid( 0x80000000 );
/* list these additional capabilities */
cpuid( 0x80000001 );
-# ifdef CAN_COMPILE_3DNOW
+# if defined (__3dNOW__)
+ i_capabilities |= CPU_CAPABILITY_3DNOW;
+# elif defined (CAN_COMPILE_3DNOW)
if( i_edx & 0x80000000 )
- {
- pid_t pid = fork();
- if( pid == 0 )
- {
- /* Test a 3D Now! instruction */
- __asm__ __volatile__ ( "pfadd %%mm0,%%mm0\n" "femms\n" : : );
- exit(0);
- }
- if( check_OS_capability( "3D Now!", pid ) )
- i_capabilities |= CPU_CAPABILITY_3DNOW;
- }
-# endif
+ check_capability( "3D Now!", CPU_CAPABILITY_3DNOW,
+ "pfadd %%mm0,%%mm0\n" "femms\n" );
+# endif
if( b_amd && ( i_edx & 0x00400000 ) )
{
out:
#elif defined( __arm__ )
-# if defined( __ARM_EABI__ ) && !defined( __SOFTFP__ )
- i_capabilities |= CPU_CAPABILITY_FPU;
+# if defined( __ARM_NEON__ )
+ i_capabilities |= CPU_CAPABILITY_NEON;
# endif
-#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ )
-
- i_capabilities |= CPU_CAPABILITY_FPU;
+#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __powerpc64__ ) \
+ || defined( __ppc64__ )
# if defined(__APPLE__)
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
# endif
-#elif defined( __sparc__ )
- i_capabilities |= CPU_CAPABILITY_FPU;
-
-#elif defined( _MSC_VER ) && !defined( UNDER_CE )
- i_capabilities |= CPU_CAPABILITY_FPU;
-
#endif
return i_capabilities;
}
projects / vlc / blobdiff