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      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:4;
     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:12;
     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:4;
     75 	unsigned int Target:2;
     76 	unsigned int OutputWriteMask:3;
     77 	unsigned int DepthWriteMask:1;
     78 	unsigned int Saturate:1;
     79 	unsigned int Omod:3;
     80 
     81 	struct rc_pair_instruction_source Src[4];
     82 	struct rc_pair_instruction_arg Arg[3];
     83 };
     84 
     85 struct rc_pair_instruction {
     86 	struct rc_pair_sub_instruction RGB;
     87 	struct rc_pair_sub_instruction Alpha;
     88 
     89 	unsigned int WriteALUResult:2;
     90 	unsigned int ALUResultCompare:3;
     91 	unsigned int Nop:1;
     92 	unsigned int SemWait:1;
     93 };
     94 
     95 typedef void (*rc_pair_foreach_src_fn)
     96 			(void *, struct rc_pair_instruction_source *);
     97 
     98 /**
     99  * General helper functions for dealing with the paired instruction format.
    100  */
    101 /*@{*/
    102 int rc_pair_alloc_source(struct rc_pair_instruction *pair,
    103 	unsigned int rgb, unsigned int alpha,
    104 	rc_register_file file, unsigned int index);
    105 
    106 void rc_pair_foreach_source_that_alpha_reads(
    107 	struct rc_pair_instruction * pair,
    108 	void * data,
    109 	rc_pair_foreach_src_fn cb);
    110 
    111 void rc_pair_foreach_source_that_rgb_reads(
    112 	struct rc_pair_instruction * pair,
    113 	void * data,
    114 	rc_pair_foreach_src_fn cb);
    115 
    116 struct rc_pair_instruction_source * rc_pair_get_src(
    117 	struct rc_pair_instruction * pair_inst,
    118 	struct rc_pair_instruction_arg * arg);
    119 
    120 int rc_pair_get_src_index(
    121 	struct rc_pair_instruction * pair_inst,
    122 	struct rc_pair_instruction_source * src);
    123 /*@}*/
    124 
    125 
    126 /**
    127  * Compiler passes that operate with the paired format.
    128  */
    129 /*@{*/
    130 struct radeon_pair_handler;
    131 
    132 void rc_pair_translate(struct radeon_compiler *cc, void *user);
    133 void rc_pair_schedule(struct radeon_compiler *cc, void *user);
    134 void rc_pair_regalloc(struct radeon_compiler *cc, void *user);
    135 void rc_pair_remove_dead_sources(struct radeon_compiler *c, void *user);
    136 /*@}*/
    137 
    138 #endif /* __RADEON_PROGRAM_PAIR_H_ */
    139