/* * (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 #include "common_ppc_features.h" 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_FEATURE_HAS_ALTIVEC; # endif #endif }