src/gallium/drivers/cell/spu/spu_util.c

   1
   2 #include "cell/common.h"
   3 #include "pipe/p_shader_tokens.h"
   4 #include "util/u_debug.h"
   5 #include "tgsi/tgsi_parse.h"
   6 //#include "tgsi_build.h"
   7 #include "tgsi/tgsi_util.h"
   8
   9 unsigned
  10 tgsi_util_get_src_register_swizzle(
  11    const struct tgsi_src_register *reg,
  12    unsigned component )
  13 {
  14    switch( component ) {
  15    case 0:
  16       return reg->SwizzleX;
  17    case 1:
  18       return reg->SwizzleY;
  19    case 2:
  20       return reg->SwizzleZ;
  21    case 3:
  22       return reg->SwizzleW;
  23    default:
  24       ASSERT( 0 );
  25    }
  26    return 0;
  27 }
  28
  29
  30 unsigned
  31 tgsi_util_get_full_src_register_swizzle(
  32    const struct tgsi_full_src_register  *reg,
  33    unsigned component )
  34 {
  35    return tgsi_util_get_src_register_swizzle(
  36       reg->SrcRegister,
  37       component );
  38 }
  39
  40
  41 unsigned
  42 tgsi_util_get_full_src_register_sign_mode(
  43    const struct  tgsi_full_src_register *reg,
  44    unsigned component )
  45 {
  46    unsigned sign_mode;
  47
  48    if( reg->SrcRegisterExtMod.Absolute ) {
  49       /* Consider only the post-abs negation. */
  50
  51       if( reg->SrcRegisterExtMod.Negate ) {
  52          sign_mode = TGSI_UTIL_SIGN_SET;
  53       }
  54       else {
  55          sign_mode = TGSI_UTIL_SIGN_CLEAR;
  56       }
  57    }
  58    else {
  59       /* Accumulate the three negations. */
  60
  61       unsigned negate;
  62
  63       negate = reg->SrcRegister.Negate;
  64       if( reg->SrcRegisterExtMod.Negate ) {
  65          negate = !negate;
  66       }
  67
  68       if( negate ) {
  69          sign_mode = TGSI_UTIL_SIGN_TOGGLE;
  70       }
  71       else {
  72          sign_mode = TGSI_UTIL_SIGN_KEEP;
  73       }
  74    }
  75
  76    return sign_mode;
  77 }