src/mesa/drivers/dri/r300/pixel_shader.h

   1 #ifndef __PIXEL_SHADER_H__
   2 #define __PIXEL_SHADER_H__
   3
   4 #include "r300_reg.h"
   5
   6
   7 /* INSTR 0 */
   8
   9 #define PFS_OP_MAD      0
  10 #define PFS_OP_DP3      1
  11 #define PFS_OP_DP4      2
  12 #define PFS_OP_MIN      4
  13 #define PFS_OP_MAX      5
  14 #define PFS_OP_CMP      8
  15 #define PFS_OP_FRC      9
  16 #define PFS_OP_OUTC_REPL_ALPHA  10
  17
  18 /* "or" these with arg0 value to negate or take absolute value of an argument */
  19 #define PFS_ARG_NEG  (1<<5)
  20 #define PFS_ARG_ABS  (1<<6)
  21
  22 #define MAKE_PFS_INSTR0(op, arg0, arg1, arg2, flags) \
  23         ( ((op)<<23) \
  24           | ((arg0)<<R300_FPI0_ARG0C_SHIFT) \
  25           | ((arg1)<<R300_FPI0_ARG1C_SHIFT) \
  26           | ((arg2)<<R300_FPI0_ARG2C_SHIFT) \
  27           | (flags) \
  28         )
  29
  30 #define PFS_FLAG_X      1
  31 #define PFS_FLAG_Y      2
  32 #define PFS_FLAG_XY     3
  33 #define PFS_FLAG_Z      4
  34 #define PFS_FLAG_XZ     5
  35 #define PFS_FLAG_YZ     6
  36 #define PFS_FLAG_ALL    7
  37 #define PFS_FLAG_NONE   0
  38
  39 #define EASY_PFS_INSTR0(op, arg0, arg1, arg2) \
  40         MAKE_PFS_INSTR0(PFS_OP_##op, \
  41                 R300_FPI0_ARGC_##arg0, \
  42                 R300_FPI0_ARGC_##arg1, \
  43                 R300_FPI0_ARGC_##arg2, \
  44                 0)
  45
  46 /* INSTR 1 */
  47
  48 #define PFS_FLAG_CONST (1<<5)
  49
  50 #define MAKE_PFS_INSTR1(dstc, src0, src1, src2, reg, output) \
  51         ((src0) | ((src1) << R300_FPI1_SRC1C_SHIFT) \
  52           | ((src2)<<R300_FPI1_SRC2C_SHIFT) \
  53           | ((dstc) << R300_FPI1_DSTC_SHIFT) \
  54           | ((reg) << 23) | ((output)<<26))
  55
  56 #define EASY_PFS_INSTR1(dstc, src0, src1, src2, reg, output) \
  57         MAKE_PFS_INSTR1(dstc, src0, src1, src2, PFS_FLAG_##reg, PFS_FLAG_##output)
  58
  59 /* INSTR 2 */
  60
  61 /* you can "or" PFS_ARG_NEG with these values to negate them */
  62
  63 #define MAKE_PFS_INSTR2(op, arg0, arg1, arg2, flags) \
  64         (((op) << 23) | \
  65           ((arg0)<<R300_FPI2_ARG0A_SHIFT) | \
  66           ((arg1)<<R300_FPI2_ARG1A_SHIFT) | \
  67           ((arg2)<<R300_FPI2_ARG2A_SHIFT) | \
  68           (flags))
  69
  70 #define EASY_PFS_INSTR2(op, arg0, arg1, arg2) \
  71         MAKE_PFS_INSTR2(R300_FPI2_OUTA_##op, \
  72                 R300_FPI2_ARGA_##arg0, \
  73                 R300_FPI2_ARGA_##arg1, \
  74                 R300_FPI2_ARGA_##arg2, \
  75                 0)
  76
  77
  78 /* INSTR 3 */
  79
  80 #define PFS_FLAG_NONE   0
  81 #define PFS_FLAG_REG    1
  82 #define PFS_FLAG_OUTPUT 2
  83 #define PFS_FLAG_BOTH   3
  84
  85 #define MAKE_PFS_INSTR3(dstc, src0, src1, src2, flags) \
  86         ((src0) | ((src1) << R300_FPI1_SRC1C_SHIFT) \
  87           | ((src2)<<R300_FPI1_SRC2C_SHIFT) \
  88           | ((dstc) << R300_FPI1_DSTC_SHIFT) \
  89           | ((flags) << 23))
  90
  91 #define EASY_PFS_INSTR3(dstc, src0, src1, src2, flag) \
  92         MAKE_PFS_INSTR3(dstc, src0, src1, src2, PFS_FLAG_##flag)
  93
  94         /* What are 0's ORed with flags ? They are register numbers that
  95            just happen to be 0 */
  96 #define PFS_NOP { \
  97                 EASY_PFS_INSTR0(MAD, SRC0C_XYZ, ONE, ZERO), \
  98                 EASY_PFS_INSTR1(0, 0, 0 | PFS_FLAG_CONST, 0 | PFS_FLAG_CONST, NONE, ALL), \
  99                 EASY_PFS_INSTR2(MAD, SRC0A, ONE, ZERO), \
 100                 EASY_PFS_INSTR3(0, 0, 0 | PFS_FLAG_CONST, 0 | PFS_FLAG_CONST, OUTPUT) \
 101                 }
 102
 103 #endif