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/*
* (C) Copyright IBM Corporation 2004
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* on the rights to use, copy, modify, merge, publish, distribute, sub
* license, and/or sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file common_ppc.c
* Check CPU capabilities & initialize optimized funtions for this particular
* processor.
*
* \author Ian Romanick <idr@us.ibm.com>
*/
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#ifdef USE_PPC_ASM
#include <elf.h>
#endif
unsigned long _mesa_ppc_cpu_features = 0;
/**
* Detect CPU features and install optimized transform and lighting routines.
* Currently, CPU features are only detected. The optimized routines have
* yet to be written.
*
* \bug
* This routine is highly specific to Linux kernel 2.6. I'm still waiting
* to hear back from the glibc folk on how to do this "right".
*/
void _mesa_init_all_ppc_transform_asm( void )
{
#ifdef USE_PPC_ASM
const pid_t my_pid = getpid();
char file_name[32];
FILE * f;
#ifdef __powerpc64__
Elf64_auxv_t v;
#else
Elf32_auxv_t v;
#endif
sprintf( file_name, "/proc/%u/auxv", (unsigned) my_pid );
f = fopen( file_name, "rb" );
if ( f != NULL ) {
while( 1 ) {
ssize_t elem = fread( & v, sizeof( v ), 1, f );
if ( elem < 1 ) {
break;
}
if ( v.a_type == AT_HWCAP ) {
_mesa_ppc_cpu_features = v.a_un.a_val;
break;
}
}
fclose( f );
}
# ifndef USE_VMX_ASM
_mesa_ppc_cpu_features &= ~PPC_FEATURES_HAS_ALTIVEC;
# endif
#endif
}
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