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_extswizzle(
  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 unsigned
  41 tgsi_util_get_src_register_extnegate(
  42    const  struct tgsi_src_register_ext_swz *reg,
  43    unsigned component )
  44 {
  45    switch( component ) {
  46    case 0:
  47       return reg->NegateX;
  48    case 1:
  49       return reg->NegateY;
  50    case 2:
  51       return reg->NegateZ;
  52    case 3:
  53       return reg->NegateW;
  54    default:
  55       ASSERT( 0 );
  56    }
  57    return 0;
  58 }
  59
  60 void
  61 tgsi_util_set_src_register_extnegate(
  62    struct tgsi_src_register_ext_swz *reg,
  63    unsigned negate,
  64    unsigned component )
  65 {
  66    switch( component ) {
  67    case 0:
  68       reg->NegateX = negate;
  69       break;
  70    case 1:
  71       reg->NegateY = negate;
  72       break;
  73    case 2:
  74       reg->NegateZ = negate;
  75       break;
  76    case 3:
  77       reg->NegateW = negate;
  78       break;
  79    default:
  80       ASSERT( 0 );
  81    }
  82 }
  83
  84 unsigned
  85 tgsi_util_get_full_src_register_sign_mode(
  86    const struct  tgsi_full_src_register *reg,
  87    unsigned component )
  88 {
  89    unsigned sign_mode;
  90
  91    if( reg->SrcRegisterExtMod.Absolute ) {
  92       /* Consider only the post-abs negation. */
  93
  94       if( reg->SrcRegisterExtMod.Negate ) {
  95          sign_mode = TGSI_UTIL_SIGN_SET;
  96       }
  97       else {
  98          sign_mode = TGSI_UTIL_SIGN_CLEAR;
  99       }
 100    }
 101    else {
 102       /* Accumulate the three negations. */
 103
 104       unsigned negate;
 105
 106       negate = reg->SrcRegister.Negate;
 107       if( tgsi_util_get_src_register_extnegate( &reg->SrcRegisterExtSwz, component ) ) {
 108          negate = !negate;
 109       }
 110       if( reg->SrcRegisterExtMod.Negate ) {
 111          negate = !negate;
 112       }
 113
 114       if( negate ) {
 115          sign_mode = TGSI_UTIL_SIGN_TOGGLE;
 116       }
 117       else {
 118          sign_mode = TGSI_UTIL_SIGN_KEEP;
 119       }
 120    }
 121
 122    return sign_mode;
 123 }