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 "main/glheader.h"
  32 #include "main/macros.h"
  33 #include "main/enums.h"
  34 #include "shader/program.h"
  35 #include "shader/prog_instruction.h"
  36
  37 struct radeon_compiler;
  38 struct rc_instruction;
  39
  40 enum {
  41         PROGRAM_BUILTIN = PROGRAM_FILE_MAX /**< not a real register, but a special swizzle constant */
  42 };
  43
  44 enum {
  45         OPCODE_REPL_ALPHA = MAX_OPCODE /**< used in paired instructions */
  46 };
  47
  48 #define SWIZZLE_0000 MAKE_SWIZZLE4(SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ZERO, SWIZZLE_ZERO)
  49 #define SWIZZLE_1111 MAKE_SWIZZLE4(SWIZZLE_ONE, SWIZZLE_ONE, SWIZZLE_ONE, SWIZZLE_ONE)
  50
  51 static inline GLuint get_swz(GLuint swz, GLuint idx)
  52 {
  53         if (idx & 0x4)
  54                 return idx;
  55         return GET_SWZ(swz, idx);
  56 }
  57
  58 static inline GLuint combine_swizzles4(GLuint src, GLuint swz_x, GLuint swz_y, GLuint swz_z, GLuint swz_w)
  59 {
  60         GLuint ret = 0;
  61
  62         ret |= get_swz(src, swz_x);
  63         ret |= get_swz(src, swz_y) << 3;
  64         ret |= get_swz(src, swz_z) << 6;
  65         ret |= get_swz(src, swz_w) << 9;
  66
  67         return ret;
  68 }
  69
  70 static inline GLuint combine_swizzles(GLuint src, GLuint swz)
  71 {
  72         GLuint ret = 0;
  73
  74         ret |= get_swz(src, GET_SWZ(swz, SWIZZLE_X));
  75         ret |= get_swz(src, GET_SWZ(swz, SWIZZLE_Y)) << 3;
  76         ret |= get_swz(src, GET_SWZ(swz, SWIZZLE_Z)) << 6;
  77         ret |= get_swz(src, GET_SWZ(swz, SWIZZLE_W)) << 9;
  78
  79         return ret;
  80 }
  81
  82 static INLINE void reset_srcreg(struct prog_src_register* reg)
  83 {
  84         _mesa_bzero(reg, sizeof(*reg));
  85         reg->Swizzle = SWIZZLE_NOOP;
  86 }
  87
  88
  89 /**
  90  * Transformation context that is passed to local transformations.
  91  *
  92  * Care must be taken with some operations during transformation,
  93  * e.g. finding new temporary registers must use @ref radeonFindFreeTemporary
  94  */
  95 struct radeon_transform_context {
  96         struct gl_program *Program;
  97         struct prog_instruction *OldInstructions;
  98         GLuint OldNumInstructions;
  99 };
 100
 101 /**
 102  * A transformation that can be passed to \ref radeonLocalTransform.
 103  *
 104  * The function will be called once for each instruction.
 105  * It has to either emit the appropriate transformed code for the instruction
 106  * and return GL_TRUE, or return GL_FALSE if it doesn't understand the
 107  * instruction.
 108  *
 109  * The function gets passed the userData as last parameter.
 110  */
 111 struct radeon_program_transformation {
 112         GLboolean (*function)(
 113                 struct radeon_transform_context*,
 114                 struct prog_instruction*,
 115                 void*);
 116         void *userData;
 117 };
 118
 119 void radeonLocalTransform(
 120         struct gl_program *program,
 121         int num_transformations,
 122         struct radeon_program_transformation* transformations);
 123
 124 /**
 125  * Find a usable free temporary register during program transformation
 126  */
 127 GLint radeonFindFreeTemporary(struct radeon_transform_context *ctx);
 128
 129 struct prog_instruction *radeonAppendInstructions(struct gl_program *program, int count);
 130
 131 GLint rc_find_free_temporary(struct radeon_compiler * c);
 132
 133 struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c);
 134 struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after);
 135
 136 void rc_mesa_to_rc_program(struct radeon_compiler * c, struct gl_program * program);
 137
 138 #endif