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/*
* Copyright (C) 2008 Nicolai Haehnle.
*
* 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 (including the
* next paragraph) 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 THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS 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.
*
*/
#ifndef __RADEON_PROGRAM_H_
#define __RADEON_PROGRAM_H_
#include <stdint.h>
#include <string.h>
#include "radeon_opcodes.h"
#include "radeon_code.h"
#include "radeon_program_constants.h"
#include "radeon_program_pair.h"
struct radeon_compiler;
struct rc_src_register {
unsigned int File:4;
/** Negative values may be used for relative addressing. */
signed int Index:(RC_REGISTER_INDEX_BITS+1);
unsigned int RelAddr:1;
unsigned int Swizzle:12;
/** Take the component-wise absolute value */
unsigned int Abs:1;
/** Post-Abs negation. */
unsigned int Negate:4;
};
struct rc_dst_register {
unsigned int File:3;
unsigned int Index:RC_REGISTER_INDEX_BITS;
unsigned int WriteMask:4;
};
struct rc_presub_instruction {
rc_presubtract_op Opcode;
struct rc_src_register SrcReg[2];
};
/**
* Instructions are maintained by the compiler in a doubly linked list
* of these structures.
*
* This instruction format is intended to be expanded for hardware-specific
* trickery. At different stages of compilation, a different set of
* instruction types may be valid.
*/
struct rc_sub_instruction {
struct rc_src_register SrcReg[3];
struct rc_dst_register DstReg;
/**
* Opcode of this instruction, according to \ref rc_opcode enums.
*/
unsigned int Opcode:8;
/**
* Saturate each value of the result to the range [0,1] or [-1,1],
* according to \ref rc_saturate_mode enums.
*/
unsigned int SaturateMode:2;
/**
* Writing to the special register RC_SPECIAL_ALU_RESULT
*/
/*@{*/
unsigned int WriteALUResult:2;
unsigned int ALUResultCompare:3;
/*@}*/
/**
* \name Extra fields for TEX, TXB, TXD, TXL, TXP instructions.
*/
/*@{*/
/** Source texture unit. */
unsigned int TexSrcUnit:5;
/** Source texture target, one of the \ref rc_texture_target enums */
unsigned int TexSrcTarget:3;
/** True if tex instruction should do shadow comparison */
unsigned int TexShadow:1;
/*@}*/
/** This holds information about the presubtract operation used by
* this instruction. */
struct rc_presub_instruction PreSub;
};
typedef enum {
RC_INSTRUCTION_NORMAL = 0,
RC_INSTRUCTION_PAIR
} rc_instruction_type;
struct rc_instruction {
struct rc_instruction * Prev;
struct rc_instruction * Next;
rc_instruction_type Type;
union {
struct rc_sub_instruction I;
struct rc_pair_instruction P;
} U;
/**
* Warning: IPs are not stable. If you want to use them,
* you need to recompute them at the beginning of each pass
* using \ref rc_recompute_ips
*/
unsigned int IP;
};
struct rc_program {
/**
* Instructions.Next points to the first instruction,
* Instructions.Prev points to the last instruction.
*/
struct rc_instruction Instructions;
/* Long term, we should probably remove InputsRead & OutputsWritten,
* since updating dependent state can be fragile, and they aren't
* actually used very often. */
uint32_t InputsRead;
uint32_t OutputsWritten;
uint32_t ShadowSamplers; /**< Texture units used for shadow sampling. */
struct rc_constant_list Constants;
};
/**
* A transformation that can be passed to \ref rc_local_transform.
*
* The function will be called once for each instruction.
* It has to either emit the appropriate transformed code for the instruction
* and return true, or return false if it doesn't understand the
* instruction.
*
* The function gets passed the userData as last parameter.
*/
struct radeon_program_transformation {
int (*function)(
struct radeon_compiler*,
struct rc_instruction*,
void*);
void *userData;
};
void rc_local_transform(
struct radeon_compiler *c,
void *user);
void rc_get_used_temporaries(
struct radeon_compiler * c,
unsigned char * used,
unsigned int used_length);
int rc_find_free_temporary_list(
struct radeon_compiler * c,
unsigned char * used,
unsigned int used_length,
unsigned int mask);
unsigned int rc_find_free_temporary(struct radeon_compiler * c);
struct rc_instruction *rc_alloc_instruction(struct radeon_compiler * c);
struct rc_instruction *rc_insert_new_instruction(struct radeon_compiler * c, struct rc_instruction * after);
void rc_insert_instruction(struct rc_instruction * after, struct rc_instruction * inst);
void rc_remove_instruction(struct rc_instruction * inst);
unsigned int rc_recompute_ips(struct radeon_compiler * c);
void rc_print_program(const struct rc_program *prog);
rc_swizzle rc_mask_to_swizzle(unsigned int mask);
#endif
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