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 #define RC_PAIR_SOURCE_NONE  0x0
  59 #define RC_PAIR_SOURCE_RGB   0x1
  60 #define RC_PAIR_SOURCE_ALPHA 0x2
  61
  62 struct rc_pair_instruction_source {
  63         unsigned int Used:1;
  64         unsigned int File:3;
  65         unsigned int Index:RC_REGISTER_INDEX_BITS;
  66 };
  67
  68 struct rc_pair_instruction_arg {
  69         unsigned int Source:2;
  70         unsigned int Swizzle:9;
  71         unsigned int Abs:1;
  72         unsigned int Negate:1;
  73 };
  74
  75 struct rc_pair_sub_instruction {
  76         unsigned int Opcode:8;
  77         unsigned int DestIndex:RC_REGISTER_INDEX_BITS;
  78         unsigned int WriteMask:3;
  79         unsigned int Target:2;
  80         unsigned int OutputWriteMask:3;
  81         unsigned int DepthWriteMask:1;
  82         unsigned int Saturate:1;
  83
  84         struct rc_pair_instruction_source Src[4];
  85         struct rc_pair_instruction_arg Arg[3];
  86 };
  87
  88 struct rc_pair_instruction {
  89         struct rc_pair_sub_instruction RGB;
  90         struct rc_pair_sub_instruction Alpha;
  91
  92         unsigned int WriteALUResult:2;
  93         unsigned int ALUResultCompare:3;
  94         unsigned int Nop:1;
  95 };
  96
  97 typedef void (*rc_pair_foreach_src_fn)
  98                         (void *, struct rc_pair_instruction_source *);
  99
 100 /**
 101  * General helper functions for dealing with the paired instruction format.
 102  */
 103 /*@{*/
 104 int rc_pair_alloc_source(struct rc_pair_instruction *pair,
 105         unsigned int rgb, unsigned int alpha,
 106         rc_register_file file, unsigned int index);
 107
 108 void rc_pair_foreach_source_that_alpha_reads(
 109         struct rc_pair_instruction * pair,
 110         void * data,
 111         rc_pair_foreach_src_fn cb);
 112
 113 void rc_pair_foreach_source_that_rgb_reads(
 114         struct rc_pair_instruction * pair,
 115         void * data,
 116         rc_pair_foreach_src_fn cb);
 117
 118 unsigned int rc_source_type_that_arg_reads(
 119         unsigned int source,
 120         unsigned int swizzle);
 121 /*@}*/
 122
 123
 124 /**
 125  * Compiler passes that operate with the paired format.
 126  */
 127 /*@{*/
 128 struct radeon_pair_handler;
 129
 130 void rc_pair_translate(struct radeon_compiler *cc, void *user);
 131 void rc_pair_schedule(struct radeon_compiler *cc, void *user);
 132 void rc_pair_regalloc(struct radeon_compiler *cc, void *user);
 133 void rc_pair_regalloc_inputs_only(struct radeon_compiler *cc, void *user);
 134 /*@}*/
 135
 136 #endif /* __RADEON_PROGRAM_PAIR_H_ */