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/*
* Mesa 3-D graphics library
* Version: 6.5
*
* Copyright (C) 1999-2005 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
*
* Private vertex program types and constants only used by files
* related to vertex programs.
*
* \author Brian Paul
* \author Keith Whitwell
* \author Ian Romanick <idr@us.ibm.com>
*/
#ifndef PROG_INSTRUCTION_H
#define PROG_INSTRUCTION_H
/**
* Condition codes for GL_NV_fragment_program
*/
/*@{*/
#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
/*@}*/
/**
* Program instruction opcodes, for both vertex and fragment programs.
* \note changes to this opcode list must be reflected in t_vb_arbprogram.c
*/
/* ARB_vp ARB_fp NV_vp NV_fp */
enum prog_opcode { /*---------------------------------*/
OPCODE_ABS, /* X X 1.1 */
OPCODE_ADD, /* X X X X */
OPCODE_ARA, /* 2 */
OPCODE_ARL, /* X X */
OPCODE_ARL_NV, /* 2 */
OPCODE_ARR, /* 2 */
OPCODE_BRA, /* 2 */
OPCODE_CAL, /* 2 2 */
OPCODE_CMP, /* X */
OPCODE_COS, /* X 2 X */
OPCODE_DDX, /* X */
OPCODE_DDY, /* X */
OPCODE_DP3, /* X X X X */
OPCODE_DP4, /* X X X X */
OPCODE_DPH, /* X X 1.1 */
OPCODE_DST, /* X X X X */
OPCODE_END, /* X X X X */
OPCODE_EX2, /* X X 2 X */
OPCODE_EXP, /* X X */
OPCODE_FLR, /* X X 2 X */
OPCODE_FRC, /* X X 2 X */
OPCODE_KIL, /* X */
OPCODE_KIL_NV, /* X */
OPCODE_LG2, /* X X 2 X */
OPCODE_LIT, /* X X X X */
OPCODE_LOG, /* X X */
OPCODE_LRP, /* X X */
OPCODE_MAD, /* X X X X */
OPCODE_MAX, /* X X X X */
OPCODE_MIN, /* X X X X */
OPCODE_MOV, /* X X X X */
OPCODE_MUL, /* X X X X */
OPCODE_PK2H, /* X */
OPCODE_PK2US, /* X */
OPCODE_PK4B, /* X */
OPCODE_PK4UB, /* X */
OPCODE_POW, /* X X X */
OPCODE_POPA, /* 3 */
OPCODE_PRINT, /* X X */
OPCODE_PUSHA, /* 3 */
OPCODE_RCC, /* 1.1 */
OPCODE_RCP, /* X X X X */
OPCODE_RET, /* 2 2 */
OPCODE_RFL, /* X X */
OPCODE_RSQ, /* X X X X */
OPCODE_SCS, /* X */
OPCODE_SEQ, /* 2 X */
OPCODE_SFL, /* 2 X */
OPCODE_SGE, /* X X X X */
OPCODE_SGT, /* 2 X */
OPCODE_SIN, /* X 2 X */
OPCODE_SLE, /* 2 X */
OPCODE_SLT, /* X X X X */
OPCODE_SNE, /* 2 X */
OPCODE_SSG, /* 2 */
OPCODE_STR, /* 2 X */
OPCODE_SUB, /* X X 1.1 X */
OPCODE_SWZ, /* X X */
OPCODE_TEX, /* X 3 X */
OPCODE_TXB, /* X 3 */
OPCODE_TXD, /* X */
OPCODE_TXL, /* 3 2 */
OPCODE_TXP, /* 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 */
MAX_OPCODE
};
/**
* Instruction source register.
*/
struct prog_src_register
{
GLuint File:4; /**< One of the PROGRAM_* register file values. */
GLint Index:9; /**< May be negative for relative addressing. */
GLuint Swizzle:12;
GLuint RelAddr:1;
/**
* \name Source register "sign" control.
*
* The ARB and NV extensions allow varrying degrees of control over the
* sign of the source vector components. These values allow enough control
* for all flavors of the extensions.
*/
/*@{*/
/**
* Per-component negation for the SWZ instruction.
*
* \since
* ARB_vertex_program, ARB_fragment_program
*/
GLuint NegateBase:4;
/**
* Take the component-wise absolute value.
*
* \since
* NV_fragment_program, NV_fragment_program_option, NV_vertex_program2,
* NV_vertex_program2_option.
*/
GLuint Abs:1;
/**
* Take the component-wise negation. The negation occurs \b after the
* (optional) absolute value operation.
*/
GLuint NegateAbs:1;
/*@}*/
};
/**
* Instruction destination register.
*/
struct prog_dst_register
{
/**
* One of the PROGRAM_* register file values.
*/
GLuint File:4;
GLuint Index:8;
GLuint WriteMask:4;
/**
* \name Conditional destination update control.
*
* \since
* NV_fragment_program, NV_fragment_program_option, NV_vertex_program2,
* NV_vertex_program2_option.
*/
/*@{*/
/**
* Takes one of the 9 possible condition values (EQ, FL, GT, GE, LE, LT,
* NE, TR, or UN). Destination update is enabled if the matching
* (swizzled) condition code value passes. When a conditional update mask
* is not specified, this will be \c COND_TR.
*/
GLuint CondMask:4;
/**
* Condition code swizzle value.
*/
GLuint CondSwizzle:12;
/**
* Selects the condition code register to use for conditional destination
* update masking. In NV_fragmnet_program or NV_vertex_program2 mode, only
* condition code register 0 is available. In NV_vertex_program3 mode,
* condition code registers 0 and 1 are available.
*/
GLuint CondSrc:1;
/*@}*/
GLuint pad:31;
};
/**
* Vertex/fragment program instruction.
*/
struct prog_instruction
{
enum prog_opcode Opcode;
#if FEATURE_MESA_program_debug
GLshort StringPos;
#endif
/**
* Arbitrary data. Used for the PRINT, CAL, and BRA instructions.
*/
void *Data;
struct prog_src_register SrcReg[3];
struct prog_dst_register DstReg;
/**
* Indicates that the instruction should update the condition code
* register.
*
* \since
* NV_fragment_program, NV_fragment_program_option, NV_vertex_program2,
* NV_vertex_program2_option.
*/
GLuint CondUpdate:1;
/**
* If prog_instruction::cc_update is \c GL_TRUE, this value selects the
* condition code register that is to be updated.
*
* In GL_NV_fragment_program or GL_NV_vertex_program2 mode, only condition
* code register 0 is available. In GL_NV_vertex_program3 mode, condition code registers
* 0 and 1 are available.
*
* \since
* NV_fragment_program, NV_fragment_program_option, NV_vertex_program2,
* NV_vertex_program2_option.
*/
GLuint CondDst:1;
/**
* Saturate each value of the vectored result to the range [0,1] or the
* range [-1,1]. \c SSAT mode (i.e., saturation to the range [-1,1]) is
* only available in NV_fragment_program2 mode.
*
* \since
* NV_fragment_program, NV_fragment_program_option, NV_vertex_program3.
*/
GLuint Saturate:2;
/**
* Per-instruction selectable precision.
*
* \since
* NV_fragment_program, NV_fragment_program_option.
*/
GLuint Precision:3;
/**
* \name Texture source controls.
*
* The texture source controls are only used with the \c TEX, \c TXD,
* \c TXL, and \c TXP instructions.
*
* \since
* ARB_fragment_program, NV_fragment_program, NV_vertex_program3.
*/
/*@{*/
/**
* Source texture unit. OpenGL supports a maximum of 32 texture
* units.
*/
GLuint TexSrcUnit:5;
/**
* Source texture target, one of TEXTURE_{1D,2D,3D,CUBE,RECT}_INDEX.
*/
GLuint TexSrcTarget:3;
/*@}*/
};
extern void
_mesa_init_instruction(struct prog_instruction *inst);
extern GLuint
_mesa_num_inst_src_regs(enum prog_opcode opcode);
extern const char *
_mesa_opcode_string(enum prog_opcode opcode);
#endif /* PROG_INSTRUCTION_H */
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