prog_instruction.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/*
 * Mesa 3-D graphics library
 * Version:  6.5.3
 *
 * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */


/**
 * \file prog_instruction.h
 *
 * Vertex/fragment program instruction datatypes and constants.
 *
 * \author Brian Paul
 * \author Keith Whitwell
 * \author Ian Romanick <[e-mail]>
 */


#ifndef PROG_INSTRUCTION_H
#define PROG_INSTRUCTION_H


/**
 * Swizzle indexes.
 * Do not change!
 */
/*@{*/
#define SWIZZLE_X    0
#define SWIZZLE_Y    1
#define SWIZZLE_Z    2
#define SWIZZLE_W    3
#define SWIZZLE_ZERO 4   /**< For SWZ instruction only */
#define SWIZZLE_ONE  5   /**< For SWZ instruction only */
#define SWIZZLE_NIL  7   /**< used during shader code gen (undefined value) */
/*@}*/

#define MAKE_SWIZZLE4(a,b,c,d) (((a)<<0) | ((b)<<3) | ((c)<<6) | ((d)<<9))
#define SWIZZLE_NOOP           MAKE_SWIZZLE4(0,1,2,3)
#define GET_SWZ(swz, idx)      (((swz) >> ((idx)*3)) & 0x7)
#define GET_BIT(msk, idx)      (((msk) >> (idx)) & 0x1)

#define SWIZZLE_XYZW MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_Y, SWIZZLE_Z, SWIZZLE_W)
#define SWIZZLE_XXXX MAKE_SWIZZLE4(SWIZZLE_X, SWIZZLE_X, SWIZZLE_X, SWIZZLE_X)
#define SWIZZLE_YYYY MAKE_SWIZZLE4(SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y, SWIZZLE_Y)
#define SWIZZLE_ZZZZ MAKE_SWIZZLE4(SWIZZLE_Z, SWIZZLE_Z, SWIZZLE_Z, SWIZZLE_Z)
#define SWIZZLE_WWWW MAKE_SWIZZLE4(SWIZZLE_W, SWIZZLE_W, SWIZZLE_W, SWIZZLE_W)


/**
 * Writemask values, 1 bit per component.
 */
/*@{*/
#define WRITEMASK_X     0x1
#define WRITEMASK_Y     0x2
#define WRITEMASK_XY    0x3
#define WRITEMASK_Z     0x4
#define WRITEMASK_XZ    0x5
#define WRITEMASK_YZ    0x6
#define WRITEMASK_XYZ   0x7
#define WRITEMASK_W     0x8
#define WRITEMASK_XW    0x9
#define WRITEMASK_YW    0xa
#define WRITEMASK_XYW   0xb
#define WRITEMASK_ZW    0xc
#define WRITEMASK_XZW   0xd
#define WRITEMASK_YZW   0xe
#define WRITEMASK_XYZW  0xf
/*@}*/


/**
 * Condition codes
 */
/*@{*/
#define COND_GT  1  /**< greater than zero */
#define COND_EQ  2  /**< equal to zero */
#define COND_LT  3  /**< less than zero */
#define COND_UN  4  /**< unordered (NaN) */
#define COND_GE  5  /**< greater then or equal to zero */
#define COND_LE  6  /**< less then or equal to zero */
#define COND_NE  7  /**< not equal to zero */
#define COND_TR  8  /**< always true */
#define COND_FL  9  /**< always false */
/*@}*/


/**
 * Instruction precision for GL_NV_fragment_program
 */
/*@{*/
#define FLOAT32  0x1
#define FLOAT16  0x2
#define FIXED12  0x4
/*@}*/


/**
 * Saturation modes when storing values.
 */
/*@{*/
#define SATURATE_OFF            0
#define SATURATE_ZERO_ONE       1
#define SATURATE_PLUS_MINUS_ONE 2
/*@}*/


/**
 * Per-component negation masks
 */
/*@{*/
#define NEGATE_X    0x1
#define NEGATE_Y    0x2
#define NEGATE_Z    0x4
#define NEGATE_W    0x8
#define NEGATE_XYZW 0xf
#define NEGATE_NONE 0x0
/*@}*/


/**
 * Program instruction opcodes, for both vertex and fragment programs.
 * \note changes to this opcode list must be reflected in t_vb_arbprogram.c
 */
typedef enum prog_opcode {
                     /* ARB_vp   ARB_fp   NV_vp   NV_fp     GLSL */
                     /*------------------------------------------*/
   OPCODE_NOP = 0,   /*                                      X   */
   OPCODE_ABS,       /*   X        X       1.1               X   */
   OPCODE_ADD,       /*   X        X       X       X         X   */
   OPCODE_ARA,       /*                    2                     */
   OPCODE_ARL,       /*   X                X                     */
   OPCODE_ARL_NV,    /*                    2                     */
   OPCODE_ARR,       /*                    2                     */
   OPCODE_BGNLOOP,   /*                                     opt  */
   OPCODE_BGNSUB,    /*                                     opt  */
   OPCODE_BRA,       /*                    2                 X   */
   OPCODE_BRK,       /*                    2                opt  */
   OPCODE_CAL,       /*                    2       2             */
   OPCODE_CMP,       /*            X                             */
   OPCODE_CONT,      /*                                     opt  */
   OPCODE_COS,       /*            X       2       X         X   */
   OPCODE_DDX,       /*                            X         X   */
   OPCODE_DDY,       /*                            X         X   */
   OPCODE_DP3,       /*   X        X       X       X         X   */
   OPCODE_DP4,       /*   X        X       X       X         X   */
   OPCODE_DPH,       /*   X        X       1.1                   */
   OPCODE_DST,       /*   X        X       X       X             */
   OPCODE_ELSE,      /*                                      X   */
   OPCODE_END,       /*   X        X       X       X        opt  */
   OPCODE_ENDIF,     /*                                     opt  */
   OPCODE_ENDLOOP,   /*                                     opt  */
   OPCODE_ENDSUB,    /*                                     opt  */
   OPCODE_EX2,       /*   X        X       2       X         X   */
   OPCODE_EXP,       /*   X                X                 X   */
   OPCODE_FLR,       /*   X        X       2       X         X   */
   OPCODE_FRC,       /*   X        X       2       X         X   */
   OPCODE_IF,        /*                                     opt  */
   OPCODE_INT,       /*                                      X   */
   OPCODE_KIL,       /*            X                             */
   OPCODE_KIL_NV,    /*                            X         X   */
   OPCODE_LG2,       /*   X        X       2       X         X   */
   OPCODE_LIT,       /*   X        X       X       X             */
   OPCODE_LOG,       /*   X                X                 X   */
   OPCODE_LRP,       /*            X               X             */
   OPCODE_MAD,       /*   X        X       X       X         X   */
   OPCODE_MAX,       /*   X        X       X       X         X   */
   OPCODE_MIN,       /*   X        X       X       X         X   */
   OPCODE_MOV,       /*   X        X       X       X         X   */
   OPCODE_MUL,       /*   X        X       X       X         X   */
   OPCODE_NOISE1,    /*                                      X   */
   OPCODE_NOISE2,    /*                                      X   */
   OPCODE_NOISE3,    /*                                      X   */
   OPCODE_NOISE4,    /*                                      X   */
   OPCODE_PK2H,      /*                            X             */
   OPCODE_PK2US,     /*                            X             */
   OPCODE_PK4B,      /*                            X             */
   OPCODE_PK4UB,     /*                            X             */
   OPCODE_POW,       /*   X        X               X         X   */
   OPCODE_POPA,      /*                    3                     */
   OPCODE_PRINT,     /*                    X       X             */
   OPCODE_PUSHA,     /*                    3                     */
   OPCODE_RCC,       /*                    1.1                   */
   OPCODE_RCP,       /*   X        X       X       X         X   */
   OPCODE_RET,       /*                    2       2             */
   OPCODE_RFL,       /*            X               X             */
   OPCODE_RSQ,       /*   X        X       X       X         X   */
   OPCODE_SCS,       /*            X                             */
   OPCODE_SEQ,       /*                    2       X         X   */
   OPCODE_SFL,       /*                    2       X             */
   OPCODE_SGE,       /*   X        X       X       X         X   */
   OPCODE_SGT,       /*                    2       X         X   */
   OPCODE_SIN,       /*            X       2       X         X   */
   OPCODE_SLE,       /*                    2       X         X   */
   OPCODE_SLT,       /*   X        X       X       X         X   */
   OPCODE_SNE,       /*                    2       X         X   */
   OPCODE_SSG,       /*                    2                     */
   OPCODE_STR,       /*                    2       X             */
   OPCODE_SUB,       /*   X        X       1.1     X         X   */
   OPCODE_SWZ,       /*   X        X                             */
   OPCODE_TEX,       /*            X       3       X         X   */
   OPCODE_TXB,       /*            X       3                 X   */
   OPCODE_TXD,       /*                            X         X   */
   OPCODE_TXL,       /*                    3       2         X   */
   OPCODE_TXP,       /*            X                         X   */
   OPCODE_TXP_NV,    /*                    3       X             */
   OPCODE_UP2H,      /*                            X             */
   OPCODE_UP2US,     /*                            X             */
   OPCODE_UP4B,      /*                            X             */
   OPCODE_UP4UB,     /*                            X             */
   OPCODE_X2D,       /*                            X             */
   OPCODE_XPD,       /*   X        X                         X   */