| /* |
| * (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 |
| } |
