/*****************************************************************************
* cpu.c: CPU detection code
*****************************************************************************
- * Copyright (C) 1998-2002 VideoLAN
- * $Id: cpu.c,v 1.11 2003/05/22 12:00:57 gbazin Exp $
+ * Copyright (C) 1998-2004 the VideoLAN team
+ * $Id$
*
* Authors: Samuel Hocevar <sam@zoy.org>
* Christophe Massiot <massiot@via.ecp.fr>
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
-#include <vlc/vlc.h>
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <vlc_common.h>
#ifdef HAVE_SIGNAL_H
# include <signal.h> /* SIGHUP, SIGINT, SIGKILL */
# include <setjmp.h> /* longjmp, setjmp */
#endif
-#ifdef SYS_DARWIN
-# include <mach/mach.h> /* AltiVec detection */
-# include <mach/mach_error.h> /* some day the header files||compiler *
- will define it for us */
-# include <mach/bootstrap.h>
-#endif
+#include "libvlc.h"
-#include "vlc_cpu.h"
+#if defined(__APPLE__) && (defined(__ppc__) || defined(__ppc64__))
+#include <sys/sysctl.h>
+#endif
/*****************************************************************************
* Local prototypes
#ifdef HAVE_SIGNAL_H
static jmp_buf env;
static int i_illegal;
-#if defined( __i386__ )
-static char *psz_capability;
+#if defined( __i386__ ) || defined( __x86_64__ )
+static const char *psz_capability;
#endif
#endif
{
volatile uint32_t i_capabilities = CPU_CAPABILITY_NONE;
-#if defined( SYS_DARWIN )
- struct host_basic_info hi;
- kern_return_t ret;
- host_name_port_t host;
-
- int i_size;
- char *psz_name, *psz_subname;
+#if defined(__APPLE__) && (defined(__ppc__) || defined(__ppc64__))
+ int selectors[2] = { CTL_HW, HW_VECTORUNIT };
+ 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);
i_capabilities |= CPU_CAPABILITY_FPU;
- /* Should 'never' fail? */
- host = mach_host_self();
-
- i_size = sizeof( hi ) / sizeof( int );
- ret = host_info( host, HOST_BASIC_INFO, ( host_info_t )&hi, &i_size );
-
- if( ret != KERN_SUCCESS )
- {
- fprintf( stderr, "error: couldn't get CPU information\n" );
- return i_capabilities;
- }
-
- slot_name( hi.cpu_type, hi.cpu_subtype, &psz_name, &psz_subname );
- /* FIXME: need better way to detect newer proccessors.
- * could do strncmp(a,b,5), but that's real ugly */
- if( !strcmp(psz_name, "ppc7400") || !strcmp(psz_name, "ppc7450") )
- {
+ if( i_error == 0 && i_has_altivec != 0 )
i_capabilities |= CPU_CAPABILITY_ALTIVEC;
- }
return i_capabilities;
-#elif defined( __i386__ )
+#elif defined( __i386__ ) || defined( __x86_64__ )
volatile unsigned int i_eax, i_ebx, i_ecx, i_edx;
- volatile vlc_bool_t b_amd;
+ volatile bool b_amd;
/* Needed for x86 CPU capabilities detection */
-# define cpuid( reg ) \
- asm volatile ( "pushl %%ebx\n\t" \
- "cpuid\n\t" \
- "movl %%ebx,%1\n\t" \
- "popl %%ebx\n\t" \
- : "=a" ( i_eax ), \
- "=r" ( i_ebx ), \
- "=c" ( i_ecx ), \
- "=d" ( i_edx ) \
- : "a" ( reg ) \
- : "cc" );
+# if defined( __x86_64__ )
+# define cpuid( reg ) \
+ asm volatile ( "cpuid\n\t" \
+ "movl %%ebx,%1\n\t" \
+ : "=a" ( i_eax ), \
+ "=b" ( i_ebx ), \
+ "=c" ( i_ecx ), \
+ "=d" ( i_edx ) \
+ : "a" ( reg ) \
+ : "cc" );
+# else
+# define cpuid( reg ) \
+ asm volatile ( "push %%ebx\n\t" \
+ "cpuid\n\t" \
+ "movl %%ebx,%1\n\t" \
+ "pop %%ebx\n\t" \
+ : "=a" ( i_eax ), \
+ "=r" ( i_ebx ), \
+ "=c" ( i_ecx ), \
+ "=d" ( i_edx ) \
+ : "a" ( reg ) \
+ : "cc" );
+# endif
# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
&& defined( HAVE_SIGNAL_H )
i_capabilities |= CPU_CAPABILITY_FPU;
- /* test for a 486 CPU */
- asm volatile ( "pushl %%ebx\n\t"
- "pushfl\n\t"
- "popl %%eax\n\t"
+# if defined( __i386__ )
+ /* check if cpuid instruction is supported */
+ asm volatile ( "push %%ebx\n\t"
+ "pushf\n\t"
+ "pop %%eax\n\t"
"movl %%eax, %%ebx\n\t"
"xorl $0x200000, %%eax\n\t"
- "pushl %%eax\n\t"
- "popfl\n\t"
- "pushfl\n\t"
- "popl %%eax\n\t"
+ "push %%eax\n\t"
+ "popf\n\t"
+ "pushf\n\t"
+ "pop %%eax\n\t"
"movl %%ebx,%1\n\t"
- "popl %%ebx\n\t"
+ "pop %%ebx\n\t"
: "=a" ( i_eax ),
"=r" ( i_ebx )
:
if( i_eax == i_ebx )
{
-# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
- && defined( HAVE_SIGNAL_H )
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
signal( SIGILL, pf_sigill );
-# endif
+# endif
return i_capabilities;
}
+# else
+ /* x86_64 supports cpuid instruction, so we dont need to check it */
+# endif
i_capabilities |= CPU_CAPABILITY_486;
# endif
}
+ if( i_edx & 0x04000000 )
+ {
+# if defined(CAN_COMPILE_SSE)
+ /* We test if OS supports the SSE instructions */
+ psz_capability = "SSE2";
+ i_illegal = 0;
+
+ if( setjmp( env ) == 0 )
+ {
+ /* Test a SSE2 instruction */
+ __asm__ __volatile__ ( "movupd %%xmm0, %%xmm0\n" : : );
+ }
+
+ if( i_illegal == 0 )
+ {
+ i_capabilities |= CPU_CAPABILITY_SSE2;
+ }
+# endif
+ }
+
/* test for additional capabilities */
cpuid( 0x80000000 );
# endif
return i_capabilities;
-#elif defined( __powerpc__ )
+#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ )
# ifdef CAN_COMPILE_ALTIVEC && defined( HAVE_SIGNAL_H )
void (*pf_sigill) (int) = signal( SIGILL, SigHandler );
i_capabilities |= CPU_CAPABILITY_FPU;
return i_capabilities;
-#elif defined( _MSC_VER )
+#elif defined( _MSC_VER ) && !defined( UNDER_CE )
i_capabilities |= CPU_CAPABILITY_FPU;
return i_capabilities;
"operating system.\n", psz_capability );
fprintf( stderr, " some optimizations will be disabled unless "
"you upgrade your OS\n" );
-# if defined( SYS_LINUX )
+# if defined( __linux__ )
fprintf( stderr, " (for instance Linux kernel 2.4.x or later)\n" );
# endif
#endif
}
#endif
+
+uint32_t cpu_flags = 0;
+
+
+/*****************************************************************************
+ * vlc_CPU: get pre-computed CPU capability flags
+ ****************************************************************************/
+unsigned vlc_CPU (void)
+{
+ return cpu_flags;
+}
+
+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)
+{
+ if (cpy)
+ pf_vlc_memcpy = cpy;
+ if (set)
+ pf_vlc_memset = set;
+}
+
+/**
+ * vlc_memcpy: fast CPU-dependent memcpy
+ */
+void *vlc_memcpy (void *tgt, const void *src, size_t n)
+{
+ return pf_vlc_memcpy (tgt, src, n);
+}
+
+/**
+ * vlc_memset: fast CPU-dependent memset
+ */
+void *vlc_memset (void *tgt, int c, size_t n)
+{
+ return pf_vlc_memset (tgt, c, n);
+}
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