src/mesa/drivers/dri/r300/compiler/radeon_program.h

   1 /*
   2  * Copyright (C) 2008 Nicolai Haehnle.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sublicense, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  21  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  22  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  */
  27
  28 #ifndef __RADEON_PROGRAM_H_
  29 #define __RADEON_PROGRAM_H_
  30
  31 #include <stdint.h>
  32 #include <string.h>
  33
  34 #include "radeon_opcodes.h"
  35 #include "radeon_code.h"
  36 #include "radeon_program_constants.h"
  37 #include "radeon_program_pair.h"
  38
  39 struct radeon_compiler;
  40
  41 struct rc_src_register {
  42         rc_register_file File:3;
  43
  44         /** Negative values may be used for relative addressing. */
  45         signed int Index:(RC_REGISTER_INDEX_BITS+1);
  46         unsigned int RelAddr:1;
  47
  48         unsigned int Swizzle:12;
  49
  50         /** Take the component-wise absolute value */
  51         unsigned int Abs:1;
  52
  53         /** Post-Abs negation. */
  54         unsigned int Negate:4;
  55 };
  56
  57 struct rc_dst_register {
  58         rc_register_file File:3;
  59
  60         /** Negative values may be used for relative addressing. */
  61         signed int Index:(RC_REGISTER_INDEX_BITS+1);
  62         unsigned int RelAddr:1;
  63
  64         unsigned int WriteMask:4;
  65 };
  66
  67 /**
  68  * Instructions are maintained by the compiler in a doubly linked list
  69  * of these structures.
  70  *
  71  * This instruction format is intended to be expanded for hardware-specific
  72  * trickery. At different stages of compilation, a different set of
  73  * instruction types may be valid.
  74  */
  75 struct rc_sub_instruction {
  76         struct rc_src_register SrcReg[3];
  77         struct rc_dst_register DstReg;
  78
  79         /**
  80          * Opcode of this instruction, according to \ref rc_opcode enums.
  81          */
  82         rc_opcode Opcode:8;
  83
  84         /**
  85          * Saturate each value of the result to the range [0,1] or [-1,1],
  86          * according to \ref rc_saturate_mode enums.
  87          */
  88         rc_saturate_mode SaturateMode:2;
  89
  90         /**
  91          * Writing to the special register RC_SPECIAL_ALU_RESULT
  92          */
  93         /*@{*/
  94         rc_write_aluresult WriteALUResult:2;
  95         rc_compare_func ALUResultCompare:3;
  96         /*@}*/
  97
  98         /**
  99          * \name Extra fields for TEX, TXB, TXD, TXL, TXP instructions.
 100          */
 101         /*@{*/
 102         /** Source texture unit. */
 103         unsigned int TexSrcUnit:5;
 104
 105         /** Source texture target, one of the \ref rc_texture_target enums */
 106         rc_texture_target TexSrcTarget:3;
 107
 108         /** True if tex instruction should do shadow comparison */
 109         unsigned int TexShadow:1;
 110         /*@}*/
 111 };
 112
 113 typedef enum {
 114         RC_INSTRUCTION_NORMAL = 0,
 115         RC_INSTRUCTION_PAIR
 116 } rc_instruction_type;
 117
 118 struct rc_instruction {
 119         struct rc_instruction * Prev;
 120         struct rc_instruction * Next;
 121
 122         rc_instruction_type Type;
 123         union {
 124                 struct rc_sub_instruction I;
 125                 struct rc_pair_instruction P;
 126         } U;
 127
 128         /**
 129          * Warning: IPs are not stable. If you want to use them,
 130          * you need to recompute them at the beginning of each pass
 131          * using \ref rc_recompute_ips
 132          */
 133         unsigned int IP;
 134 };
 135
 136 struct rc_program {
 137         /**
 138          * Instructions.Next points to the first instruction,
 139          * Instructions.Prev points to the last instruction.
 140          */
 141         struct rc_instruction Instructions;
 142
 143         /* Long term, we should probably remove InputsRead & OutputsWritten,
 144          * since updating dependent state can be fragile, and they aren't
 145          * actually used very often. */
 146         uint32_t InputsRead;
 147         uint32_t OutputsWritten;
 148         uint32_t ShadowSamplers; /**< Texture units used for shadow sampling. */
 149
 150         struct rc_constant_list Constants;
 151 };
 152
 153 enum {
 154         OPCODE_REPL_ALPHA = MAX_RC_OPCODE /**< used in paired instructions */
 155 };
 156
 157
 158 static inline rc_swizzle get_swz(unsigned int swz, rc_swizzle idx)
 159 {
 160         if (idx & 0x4)
 161                 return idx;
 162         return GET_SWZ(swz, idx);
 163 }
 164
 165 static inline unsigned int combine_swizzles4(unsigned int src,
 166                 rc_swizzle swz_x, rc_swizzle swz_y, rc_swizzle swz_z, rc_swizzle swz_w)
 167 {
 168         unsigned int ret = 0;
 169
 170         ret |= get_swz(src, swz_x);
 171         ret |= get_swz(src, swz_y) << 3;
 172         ret |= get_swz(src, swz_z) << 6;
 173         ret |= get_swz(src, swz_w) << 9;
 174
 175         return ret;
 176 }
 177
 178 static inline unsigned int combine_swizzles(unsigned int src, unsigned int swz)
 179 {
 180         unsigned int ret = 0;
 181
 182         ret |= get_swz(src, GET_SWZ(swz, RC_SWIZZLE_X));
 183         ret |= get_swz(src, GET_SWZ(swz, RC_SWIZZLE_Y)) << 3;
 184         ret |= get_swz(src, GET_SWZ(swz, RC_SWIZZLE_Z)) << 6;
 185         ret |= get_swz(src, GET_SWZ(swz, RC_SWIZZLE_W)) << 9;
 186
 187         return ret;
 188 }
 189
 190 struct rc_src_register lmul_swizzle(unsigned int swizzle, struct rc_src_register srcreg);
 191
 192 static inline void reset_srcreg(struct rc_src_register* reg)
 193 {
 194         memset(reg, 0, sizeof(reg));
 195         reg->Swizzle = RC_SWIZZLE_XYZW;
 196 }
 197
 198
 199 /**
 200  * A transformation that can be passed to \ref radeonLocalTransform.
 201  *
 202  * The function will be called once for each instruction.
 203  * It has to either emit the appropriate transformed code for the instruction
 204  * and return true, or return false if it doesn't understand the
 205  * instruction.
 206  *
 207  * The function gets passed the userData as last parameter.
 208  */
 209 struct radeon_program_transformation {
 210         int (*function)(
 211                 struct radeon_compiler*,
 212                 struct rc_instruction*,
 213                 void*);
 214         void *userData;
 215 };
 216
 217 void radeonLocalTransform(
 218         struct radeon_compiler *c,
 219         int num_transformations,
 220         struct radeon_program_transformation* transformations);
 221
 222 unsigned int rc_find_free_temporary(struct radeon_compiler * c);
 223
 224 struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c);
 225 struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after);
 226 void rc_insert_instruction(struct rc_instruction * after, struct rc_instruction * inst);
 227 void rc_remove_instruction(struct rc_instruction * inst);
 228
 229 unsigned int rc_recompute_ips(struct radeon_compiler * c);
 230
 231 void rc_print_program(const struct rc_program *prog);
 232
 233 #endif