/*****************************************************************************
* cpu.c: CPU detection code
*****************************************************************************
- * Copyright (C) 1998-2002 VideoLAN
- * $Id: cpu.c,v 1.3 2002/06/04 00:11:12 sam 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 <signal.h> /* SIGHUP, SIGINT, SIGKILL */
-#include <setjmp.h> /* longjmp, setjmp */
-
#include <vlc/vlc.h>
-#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>
+#ifdef HAVE_SIGNAL_H
+# include <signal.h> /* SIGHUP, SIGINT, SIGKILL */
+# include <setjmp.h> /* longjmp, setjmp */
#endif
-#include "vlc_cpu.h"
+#if defined(__APPLE__) && (defined(__ppc__) || defined(__ppc64__))
+#include <sys/sysctl.h>
+#endif
/*****************************************************************************
* Local prototypes
*****************************************************************************/
-static void IllegalSignalHandler( int i_signal );
+#ifdef HAVE_SIGNAL_H
+static void SigHandler ( int );
+#endif
/*****************************************************************************
* Global variables - they're needed for signal handling
*****************************************************************************/
+#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
/*****************************************************************************
- * CPUCapabilities: list the processors MMX support and other capabilities
+ * CPUCapabilities: get the CPU capabilities
*****************************************************************************
* This function is called to list extensions the CPU may have.
*****************************************************************************/
-u32 __CPUCapabilities( vlc_object_t *p_this )
+uint32_t CPUCapabilities( void )
{
- volatile u32 i_capabilities = CPU_CAPABILITY_NONE;
-
-#if defined( SYS_DARWIN )
- struct host_basic_info hi;
- kern_return_t ret;
- host_name_port_t host;
+ volatile uint32_t i_capabilities = CPU_CAPABILITY_NONE;
- 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 );
+ 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;
/* Needed for x86 CPU capabilities detection */
-# define cpuid( a ) \
- 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" ( a ) \
- : "cc" );
-
- i_capabilities |= CPU_CAPABILITY_FPU;
+# 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 )
- signal( SIGILL, IllegalSignalHandler );
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
+ void (*pf_sigill) (int) = signal( SIGILL, SigHandler );
# endif
- /* test for a 486 CPU */
- asm volatile ( "pushl %%ebx\n\t"
- "pushfl\n\t"
- "popl %%eax\n\t"
+ i_capabilities |= CPU_CAPABILITY_FPU;
+
+# 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 )
- signal( SIGILL, NULL );
-# endif
- return( i_capabilities );
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
+ signal( SIGILL, pf_sigill );
+# endif
+ return i_capabilities;
}
+# else
+ /* x86_64 supports cpuid instruction, so we dont need to check it */
+# endif
i_capabilities |= CPU_CAPABILITY_486;
if( !i_eax )
{
-# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW )
- signal( SIGILL, NULL );
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
+ signal( SIGILL, pf_sigill );
# endif
- return( i_capabilities );
+ return i_capabilities;
}
/* FIXME: this isn't correct, since some 486s have cpuid */
if( ! (i_edx & 0x00800000) )
{
-# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW )
- signal( SIGILL, NULL );
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
+ signal( SIGILL, pf_sigill );
# endif
- return( i_capabilities );
+ return i_capabilities;
}
i_capabilities |= CPU_CAPABILITY_MMX;
psz_capability = "SSE";
i_illegal = 0;
- vlc_mutex_lock( p_this->p_vlc->p_global_lock );
if( setjmp( env ) == 0 )
{
/* Test a SSE instruction */
__asm__ __volatile__ ( "xorps %%xmm0,%%xmm0\n" : : );
}
- vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
if( i_illegal == 0 )
{
# 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 );
if( i_eax < 0x80000001 )
{
-# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW )
- signal( SIGILL, NULL );
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
+ signal( SIGILL, pf_sigill );
# endif
- return( i_capabilities );
+ return i_capabilities;
}
/* list these additional capabilities */
psz_capability = "3D Now!";
i_illegal = 0;
- vlc_mutex_lock( p_this->p_vlc->p_global_lock );
if( setjmp( env ) == 0 )
{
/* Test a 3D Now! instruction */
__asm__ __volatile__ ( "pfadd %%mm0,%%mm0\n" "femms\n" : : );
}
- vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
if( i_illegal == 0 )
{
i_capabilities |= CPU_CAPABILITY_MMXEXT;
}
-# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW )
- signal( SIGILL, NULL );
+# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
+ && defined( HAVE_SIGNAL_H )
+ signal( SIGILL, pf_sigill );
# endif
- return( i_capabilities );
+ return i_capabilities;
-#elif defined( __powerpc__ )
+#elif defined( __powerpc__ ) || defined( __ppc__ ) || defined( __ppc64__ )
- i_capabilities |= CPU_CAPABILITY_FPU;
+# ifdef CAN_COMPILE_ALTIVEC && defined( HAVE_SIGNAL_H )
+ void (*pf_sigill) (int) = signal( SIGILL, SigHandler );
-# ifdef CAN_COMPILE_ALTIVEC
- signal( SIGILL, IllegalSignalHandler );
+ i_capabilities |= CPU_CAPABILITY_FPU;
i_illegal = 0;
- vlc_mutex_lock( p_this->p_vlc->p_global_lock );
if( setjmp( env ) == 0 )
{
asm volatile ("mtspr 256, %0\n\t"
:
: "r" (-1));
}
- vlc_mutex_unlock( p_this->p_vlc->p_global_lock );
if( i_illegal == 0 )
{
i_capabilities |= CPU_CAPABILITY_ALTIVEC;
}
- signal( SIGILL, NULL );
+ signal( SIGILL, pf_sigill );
# endif
- return( i_capabilities );
+ return i_capabilities;
#elif defined( __sparc__ )
i_capabilities |= CPU_CAPABILITY_FPU;
- return( i_capabilities );
+ return i_capabilities;
+
+#elif defined( _MSC_VER ) && !defined( UNDER_CE )
+ i_capabilities |= CPU_CAPABILITY_FPU;
+ return i_capabilities;
#else
/* default behaviour */
- return( i_capabilities );
+ return i_capabilities;
#endif
}
/*****************************************************************************
- * IllegalSignalHandler: system signal handler
+ * SigHandler: system signal handler
*****************************************************************************
* This function is called when an illegal instruction signal is received by
* the program. We use this function to test OS and CPU capabilities
*****************************************************************************/
-static void IllegalSignalHandler( int i_signal )
+#if defined( HAVE_SIGNAL_H )
+static void SigHandler( int i_signal )
{
/* Acknowledge the signal received */
i_illegal = 1;
longjmp( env, 1 );
}
+#endif
+
+
+uint32_t cpu_flags = 0;
+
+
+/*****************************************************************************
+ * vlc_CPU: get pre-computed CPU capability flags
+ ****************************************************************************/
+unsigned vlc_CPU (void)
+{
+ return cpu_flags;
+}
projects / vlc / blobdiff