_mesa_init_all_ppc_transform_asm

void _mesa_init_all_ppc_transform_asm ( void )

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".

Definition at line 56 of file common_ppc.c.

Referenced by _math_init_transformation().

{
#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
}

ReactOS Development > Doxygen