src/mesa/drivers/dri/r300/compiler/radeon_program_pair.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_PAIR_H_
  29 #define __RADEON_PROGRAM_PAIR_H_
  30
  31 #include "radeon_code.h"
  32 #include "radeon_opcodes.h"
  33 #include "radeon_program_constants.h"
  34
  35 struct radeon_compiler;
  36
  37
  38 /**
  39  * \file
  40  * Represents a paired ALU instruction, as found in R300 and R500
  41  * fragment programs.
  42  *
  43  * Note that this representation is taking some liberties as far
  44  * as register files are concerned, to allow separate register
  45  * allocation.
  46  *
  47  * Also note that there are some subtleties in that the semantics
  48  * of certain opcodes are implicitly changed in this representation;
  49  * see \ref rc_pair_translate
  50  */
  51
  52 /* For rgb and alpha instructions when arg[n].Source = RC_PAIR_PRESUB_SRC, then
  53  * the presubtract value will be used, and
  54  * {RGB,Alpha}.Src[RC_PAIR_PRESUB_SRC].File will be set to RC_FILE_PRESUB.
  55  */
  56 #define RC_PAIR_PRESUB_SRC 3
  57
  58 struct rc_pair_instruction_source {
  59         unsigned int Used:1;
  60         unsigned int File:3;
  61         unsigned int Index:RC_REGISTER_INDEX_BITS;
  62 };
  63
  64 struct rc_pair_instruction_arg {
  65         unsigned int Source:2;
  66         unsigned int Swizzle:9;
  67         unsigned int Abs:1;
  68         unsigned int Negate:1;
  69 };
  70
  71 struct rc_pair_sub_instruction {
  72         unsigned int Opcode:8;
  73         unsigned int DestIndex:RC_REGISTER_INDEX_BITS;
  74         unsigned int WriteMask:3;
  75         unsigned int Target:2;
  76         unsigned int OutputWriteMask:3;
  77         unsigned int DepthWriteMask:1;
  78         unsigned int Saturate:1;
  79
  80         struct rc_pair_instruction_source Src[4];
  81         struct rc_pair_instruction_arg Arg[3];
  82 };
  83
  84 struct rc_pair_instruction {
  85         struct rc_pair_sub_instruction RGB;
  86         struct rc_pair_sub_instruction Alpha;
  87
  88         unsigned int WriteALUResult:2;
  89         unsigned int ALUResultCompare:3;
  90         unsigned int Nop:1;
  91 };
  92
  93 typedef void (*rc_pair_foreach_src_fn)
  94                         (void *, struct rc_pair_instruction_source *);
  95
  96 typedef enum {
  97         RC_PAIR_SOURCE_NONE = 0,
  98         RC_PAIR_SOURCE_RGB,
  99         RC_PAIR_SOURCE_ALPHA
 100 } rc_pair_source_type;
 101
 102 /**
 103  * General helper functions for dealing with the paired instruction format.
 104  */
 105 /*@{*/
 106 int rc_pair_alloc_source(struct rc_pair_instruction *pair,
 107         unsigned int rgb, unsigned int alpha,
 108         rc_register_file file, unsigned int index);
 109
 110 void rc_pair_foreach_source_that_alpha_reads(
 111         struct rc_pair_instruction * pair,
 112         void * data,
 113         rc_pair_foreach_src_fn cb);
 114
 115 void rc_pair_foreach_source_that_rgb_reads(
 116         struct rc_pair_instruction * pair,
 117         void * data,
 118         rc_pair_foreach_src_fn cb);
 119
 120 rc_pair_source_type rc_source_type_that_arg_reads(
 121         unsigned int source,
 122         unsigned int swizzle,
 123         unsigned int channels);
 124 /*@}*/
 125
 126
 127 /**
 128  * Compiler passes that operate with the paired format.
 129  */
 130 /*@{*/
 131 struct radeon_pair_handler;
 132
 133 void rc_pair_translate(struct radeon_compiler *cc, void *user);
 134 void rc_pair_schedule(struct radeon_compiler *cc, void *user);
 135 void rc_pair_regalloc(struct radeon_compiler *cc, void *user);
 136 void rc_pair_regalloc_inputs_only(struct radeon_compiler *cc, void *user);
 137 /*@}*/
 138
 139 #endif /* __RADEON_PROGRAM_PAIR_H_ */