[vlc-devel] VLC and 64bit processors
Stephen Rhodes
stephen at rhodesresearch.biz
Sun Jul 10 04:10:41 CEST 2005
I have now compiled VLC 0.8.2. on a AMD64 Mandrake 10.2 Linux machine. it
configures fine with --libdir=/usr/lib64 --libdir=/usr/X11R6/lib64.
The deal breaker is cpu.c which does not recognise the longer register types.
I attach a patched version of this file which compiles fine.
The other issue rests with a number of pointer to int conversions which need
to be fixed. The 64-bit processors use a 64 bit pointer. These are listed
below.
regards
Stephen
========================================
modules/video_filter/deinterlace.c:950:
cast from pointer to integer of different size
modules/access/mms/mmsh.c:209:
cast to pointer from integer of different size
modules/access/mms/mmstu.c:295:
cast to pointer from integer of different size
modules/gui/skins2/src/theme_loader.cpp:559:
cast from pointer to integer of different size
modules/gui/wxwindows/open.cpp:1339:
cast from pointer to integer of different size
modules/gui/wxwindows/open.cpp:1345:
cast from pointer to integer of different size
modules/gui/wxwindows/preferences_widgets.cpp:217:
cast to pointer from integer of different size
modules/gui/wxwindows/preferences_widgets.cpp:262:
cast from pointer to integer of different size
modules/gui/wxwindows/preferences_widgets.cpp:812:
cast to pointer from integer of different size
modules/gui/wxwindows/preferences_widgets.cpp:864:
cast from pointer to integer of different size
modules/gui/wxwindows/subtitles.cpp:160:
cast to pointer from integer of different size
modules/gui/wxwindows/subtitles.cpp:190:
cast to pointer from integer of different size
modules/misc/memcpy/fastmemcpy.h:249:
cast from pointer to integer of different size
modules/stream_out/transcode.c:961:
assignment from incompatible pointer type
src/input/var.c:285:
cast to pointer from integer of different size
src/input/var.c:647:
cast from pointer to integer of different size
src/video_output/:83:
cast to pointer from integer of different size
-------------- next part --------------
/*****************************************************************************
* cpu.c: CPU detection code
*****************************************************************************
* Copyright (C) 1998-2004 VideoLAN
* $Id: cpu.c 10687 2005-04-15 18:06:51Z massiot $
*
* Authors: Samuel Hocevar <sam at zoy.org>
* Christophe Massiot <massiot at via.ecp.fr>
* Eugenio Jarosiewicz <ej0 at cise.ufl.eduEujenio>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#include <vlc/vlc.h>
#ifdef HAVE_SIGNAL_H
# include <signal.h> /* SIGHUP, SIGINT, SIGKILL */
# include <setjmp.h> /* longjmp, setjmp */
#endif
#ifdef SYS_DARWIN
#include <sys/sysctl.h>
#endif
#include "vlc_cpu.h"
/*****************************************************************************
* Local prototypes
*****************************************************************************/
#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__ ) || defined( __x86_64__ )
static char *psz_capability;
#endif
#endif
/*****************************************************************************
* CPUCapabilities: get the CPU capabilities
*****************************************************************************
* This function is called to list extensions the CPU may have.
*****************************************************************************/
uint32_t CPUCapabilities( void )
{
volatile uint32_t i_capabilities = CPU_CAPABILITY_NONE;
#if defined( SYS_DARWIN )
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;
if( i_error == 0 && i_has_altivec != 0 )
i_capabilities |= CPU_CAPABILITY_ALTIVEC;
return i_capabilities;
#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 */
#if !defined( __x86_64__ )
# 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" );
#else
# define cpuid( reg ) \
asm volatile ( "push %%rbx\n\t" \
"cpuid\n\t" \
"movl %%ebx,%1\n\t" \
"pop %%rbx\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 )
void (*pf_sigill) (int) = signal( SIGILL, SigHandler );
# endif
i_capabilities |= CPU_CAPABILITY_FPU;
#if !defined( __x86_64__ )
asm volatile ( "push %%ebx\n\t"
"pushf\n\t"
"pop %%eax\n\t"
"movl %%eax, %%ebx\n\t"
"xorl $0x200000, %%eax\n\t"
"push %%eax\n\t"
"popf\n\t"
"pushf\n\t"
"pop %%eax\n\t"
"movl %%ebx,%1\n\t"
"pop %%ebx\n\t"
: "=a" ( i_eax ),
"=r" ( i_ebx )
:
: "cc" );
#else
asm volatile ( "push %%rbx\n\t"
"pushf\n\t"
"pop %%rax\n\t"
"movl %%eax, %%ebx\n\t"
"xorl $0x200000, %%eax\n\t"
"push %%rax\n\t"
"popf\n\t"
"pushf\n\t"
"pop %%rax\n\t"
"movl %%ebx,%1\n\t"
"pop %%rbx\n\t"
: "=a" ( i_eax ),
"=r" ( i_ebx )
:
: "cc" );
#endif
if( i_eax == i_ebx )
{
# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
&& defined( HAVE_SIGNAL_H )
signal( SIGILL, pf_sigill );
# endif
return i_capabilities;
}
i_capabilities |= CPU_CAPABILITY_486;
/* the CPU supports the CPUID instruction - get its level */
cpuid( 0x00000000 );
if( !i_eax )
{
# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
&& defined( HAVE_SIGNAL_H )
signal( SIGILL, pf_sigill );
# endif
return i_capabilities;
}
/* FIXME: this isn't correct, since some 486s have cpuid */
i_capabilities |= CPU_CAPABILITY_586;
/* borrowed from mpeg2dec */
b_amd = ( i_ebx == 0x68747541 ) && ( i_ecx == 0x444d4163 )
&& ( i_edx == 0x69746e65 );
/* test for the MMX flag */
cpuid( 0x00000001 );
if( ! (i_edx & 0x00800000) )
{
# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
&& defined( HAVE_SIGNAL_H )
signal( SIGILL, pf_sigill );
# endif
return i_capabilities;
}
i_capabilities |= CPU_CAPABILITY_MMX;
if( i_edx & 0x02000000 )
{
i_capabilities |= CPU_CAPABILITY_MMXEXT;
# ifdef CAN_COMPILE_SSE
/* We test if OS supports the SSE instructions */
psz_capability = "SSE";
i_illegal = 0;
if( setjmp( env ) == 0 )
{
/* Test a SSE instruction */
__asm__ __volatile__ ( "xorps %%xmm0,%%xmm0\n" : : );
}
if( i_illegal == 0 )
{
i_capabilities |= CPU_CAPABILITY_SSE;
}
# 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 ) \
&& defined( HAVE_SIGNAL_H )
signal( SIGILL, pf_sigill );
# endif
return i_capabilities;
}
/* list these additional capabilities */
cpuid( 0x80000001 );
# ifdef CAN_COMPILE_3DNOW
if( i_edx & 0x80000000 )
{
psz_capability = "3D Now!";
i_illegal = 0;
if( setjmp( env ) == 0 )
{
/* Test a 3D Now! instruction */
__asm__ __volatile__ ( "pfadd %%mm0,%%mm0\n" "femms\n" : : );
}
if( i_illegal == 0 )
{
i_capabilities |= CPU_CAPABILITY_3DNOW;
}
}
# endif
if( b_amd && ( i_edx & 0x00400000 ) )
{
i_capabilities |= CPU_CAPABILITY_MMXEXT;
}
# if defined( CAN_COMPILE_SSE ) || defined ( CAN_COMPILE_3DNOW ) \
&& defined( HAVE_SIGNAL_H )
signal( SIGILL, pf_sigill );
# endif
return i_capabilities;
#elif defined( __powerpc__ )
# ifdef CAN_COMPILE_ALTIVEC && defined( HAVE_SIGNAL_H )
void (*pf_sigill) (int) = signal( SIGILL, SigHandler );
i_capabilities |= CPU_CAPABILITY_FPU;
i_illegal = 0;
if( setjmp( env ) == 0 )
{
asm volatile ("mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1));
}
if( i_illegal == 0 )
{
i_capabilities |= CPU_CAPABILITY_ALTIVEC;
}
signal( SIGILL, pf_sigill );
# endif
return i_capabilities;
#elif defined( __sparc__ )
i_capabilities |= CPU_CAPABILITY_FPU;
return i_capabilities;
#elif defined( _MSC_VER ) && !defined( UNDER_CE )
i_capabilities |= CPU_CAPABILITY_FPU;
return i_capabilities;
#else
/* default behaviour */
return i_capabilities;
#endif
}
/*****************************************************************************
* 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
*****************************************************************************/
#if defined( HAVE_SIGNAL_H )
static void SigHandler( int i_signal )
{
/* Acknowledge the signal received */
i_illegal = 1;
#ifdef HAVE_SIGRELSE
sigrelse( i_signal );
#endif
#if defined( __i386__ )
fprintf( stderr, "warning: your CPU has %s instructions, but not your "
"operating system.\n", psz_capability );
fprintf( stderr, " some optimizations will be disabled unless "
"you upgrade your OS\n" );
# if defined( SYS_LINUX )
fprintf( stderr, " (for instance Linux kernel 2.4.x or later)\n" );
# endif
#endif
longjmp( env, 1 );
}
#endif
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