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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_NQSSADCE_H_
#define __RADEON_PROGRAM_NQSSADCE_H_
#include "radeon_program.h"
struct register_state {
/**
* Bitmask indicating which components of the register are sourced
* by later instructions.
*/
GLuint Sourced : 4;
};
/**
* Maintain state such as which registers are used, which registers are
* read from, etc.
*/
struct nqssadce_state {
struct radeon_compiler *Compiler;
struct radeon_nqssadce_descr *Descr;
/**
* All instructions after this instruction pointer have been dealt with.
*/
struct rc_instruction * IP;
/**
* Which registers are read by subsequent instructions?
*/
struct register_state Temps[MAX_PROGRAM_TEMPS];
struct register_state Outputs[VERT_RESULT_MAX];
struct register_state Address;
void * UserData;
};
/**
* This structure contains a description of the hardware in-so-far as
* it is required for the NqSSA-DCE pass.
*/
struct radeon_nqssadce_descr {
/**
* Fill in which outputs
*/
void (*Init)(struct nqssadce_state *);
/**
* Check whether the given swizzle, absolute and negate combination
* can be implemented natively by the hardware for this opcode.
*/
GLboolean (*IsNativeSwizzle)(GLuint opcode, struct prog_src_register reg);
/**
* Emit (at the current IP) the instruction MOV dst, src;
* The transformation will work recursively on the emitted instruction(s).
*/
void (*BuildSwizzle)(struct nqssadce_state*, struct prog_dst_register dst, struct prog_src_register src);
};
void radeonNqssaDce(struct radeon_compiler * c, struct radeon_nqssadce_descr* descr, void * data);
struct prog_src_register lmul_swizzle(GLuint swizzle, struct prog_src_register srcreg);
#endif /* __RADEON_PROGRAM_NQSSADCE_H_ */
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