#endif
#include <vlc_common.h>
+#include <vlc_cpu.h>
#include <sys/types.h>
#ifndef WIN32
#include <unistd.h>
#include <sys/wait.h>
+#include <signal.h>
+#else
+#include <errno.h>
#endif
+#include <assert.h>
-#include "libvlc.h"
-
-#if defined(__APPLE__) && (defined(__ppc__) || defined(__ppc64__))
+#ifdef __APPLE__
#include <sys/sysctl.h>
#endif
-#if defined( __i386__ ) || defined( __x86_64__ ) \
- || defined( __ppc__ ) || defined( __ppc64__ )
+#include "libvlc.h"
+
+#if defined( __i386__ ) || defined( __x86_64__ ) || defined( __powerpc__ ) \
+ || defined( __ppc__ ) || defined( __ppc64__ ) || defined( __powerpc64__ )
+# ifndef WIN32
static bool check_OS_capability( const char *psz_capability, pid_t pid )
{
-#ifndef WIN32
int status;
if( pid == -1 )
fprintf( stderr, " some optimizations will be disabled unless "
"you upgrade your OS\n" );
return false;
-#else
-# warning FIXME!
-# define fork() (errno = ENOSYS, -1)
- (void)pid;
- (void)psz_capability;
- return true;
-#endif
}
+
+# define check_capability(name, flag, code) \
+ do { \
+ pid_t pid = fork(); \
+ if( pid == 0 ) \
+ { \
+ signal(SIGILL, SIG_DFL); \
+ __asm__ __volatile__ ( code : : ); \
+ _exit(0); \
+ } \
+ if( check_OS_capability((name), pid )) \
+ i_capabilities |= (flag); \
+ } while(0)
+
+# else /* WIN32 */
+# define check_capability(name, flag, code) \
+ i_capabilities |= (flag);
+# endif
#endif
/*****************************************************************************
*****************************************************************************/
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 */
+# 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;
-# endif
+#elif defined (__arm__)
-#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ )
+# if defined (__ARM_NEON__)
+ i_capabilities |= CPU_CAPABILITY_NEON;
+# elif defined (CAN_COMPILE_NEON)
+# define NEED_RUNTIME_CPU_CHECK 1
+# endif
- i_capabilities |= CPU_CAPABILITY_FPU;
+# ifdef NEED_RUNTIME_CPU_CHECK
+# if defined (__linux__)
+ FILE *info = fopen ("/proc/cpuinfo", "rt");
+ if (info != NULL)
+ {
+ char *line = NULL;
+ size_t linelen = 0;
-# if defined(__APPLE__)
+ while (getline (&line, &linelen, info) != -1)
+ {
+ const char *cap;
+
+ if (strncmp (line, "Features\t:", 10))
+ continue;
+# if defined (CAN_COMPILE_NEON) && !defined (__ARM_NEON__)
+ cap = strstr (line + 10, " neon");
+ if (cap != NULL && (cap[5] == '\0' || cap[5] == ' '))
+ i_capabilities |= CPU_CAPABILITY_NEON;
+# endif
+ break;
+ }
+ fclose (info);
+ free (line);
+ }
+# else
+# warning Run-time CPU detection missing: optimizations disabled!
+# endif
+# endif
+
+#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __powerpc64__ ) \
+ || defined( __ppc64__ )
+
+# if defined(__APPLE__) || defined(__OpenBSD__)
+# if defined(__OpenBSD__)
+ int selectors[2] = { CTL_MACHDEP, CPU_ALTIVEC };
+# else
int selectors[2] = { CTL_HW, HW_VECTORUNIT };
+# endif
int i_has_altivec = 0;
size_t i_length = sizeof( i_has_altivec );
int i_error = sysctl( selectors, 2, &i_has_altivec, &i_length, NULL, 0);
pid_t pid = fork();
if( pid == 0 )
{
+ signal(SIGILL, SIG_DFL);
asm volatile ("mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1));
- exit(0);
+ _exit(0);
}
if( check_OS_capability( "Altivec", pid ) )
# 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;
}
}
static vlc_memcpy_t pf_vlc_memcpy = memcpy;
-static vlc_memset_t pf_vlc_memset = memset;
-void vlc_fastmem_register (vlc_memcpy_t cpy, vlc_memset_t set)
+void vlc_fastmem_register (vlc_memcpy_t cpy)
{
- if (cpy)
- pf_vlc_memcpy = cpy;
- if (set)
- pf_vlc_memset = set;
+ assert (cpy != NULL);
+ pf_vlc_memcpy = cpy;
}
/**
}
/**
- * vlc_memset: fast CPU-dependent memset
+ * Returned an aligned pointer on newly allocated memory.
+ * \param alignment must be a power of 2 and a multiple of sizeof(void*)
+ * \param size is the size of the usable memory returned.
+ *
+ * It must not be freed directly, *base must.
*/
-void *vlc_memset (void *tgt, int c, size_t n)
+void *vlc_memalign(void **base, size_t alignment, size_t size)
{
- return pf_vlc_memset (tgt, c, n);
+ assert(alignment >= sizeof(void*));
+ for (size_t t = alignment; t > 1; t >>= 1)
+ assert((t&1) == 0);
+#if defined(HAVE_POSIX_MEMALIGN)
+ if (posix_memalign(base, alignment, size)) {
+ *base = NULL;
+ return NULL;
+ }
+ return *base;
+#elif defined(HAVE_MEMALIGN)
+ return *base = memalign(alignment, size);
+#else
+ unsigned char *p = *base = malloc(size + alignment - 1);
+ if (!p)
+ return NULL;
+ return (void*)((uintptr_t)(p + alignment - 1) & ~(alignment - 1));
+#endif
}
projects / vlc / blobdiff