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/*
* Copyright (C) 2009 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_DATAFLOW_H
#define RADEON_DATAFLOW_H
#include "radeon_program_constants.h"
struct radeon_compiler;
struct rc_instruction;
struct rc_swizzle_caps;
struct rc_dataflow_vector;
struct rc_dataflow_ref {
struct rc_dataflow_vector * Vector;
/**
* Linked list of references to the above-mentioned vector.
* The linked list is \em not sorted.
*/
/*@{*/
struct rc_dataflow_ref * Prev;
struct rc_dataflow_ref * Next;
/*@}*/
unsigned int UseMask:4;
struct rc_instruction * ReadInstruction;
};
struct rc_dataflow_vector {
rc_register_file File:3;
unsigned int Index:RC_REGISTER_INDEX_BITS;
/** For private use in compiler passes. MUST BE RESET TO 0 by the end of each pass.
* The annotate pass uses this bit to track whether a vector is in the
* update stack.
*/
unsigned int PassBit:1;
/** Which of the components have been written with useful values */
unsigned int ValidMask:4;
/** Which of the components are used downstream */
unsigned int UseMask:4;
/** The instruction that produced this vector */
struct rc_instruction * WriteInstruction;
/** Linked list of references to this vector */
struct rc_dataflow_ref Refs;
};
struct rc_instruction_dataflow {
struct rc_dataflow_ref * SrcReg[3];
struct rc_dataflow_ref * SrcRegAddress[3];
/** Reference the components of the destination register
* that are carried over without being overwritten */
struct rc_dataflow_ref * DstRegPrev;
/** Indicates whether the destination register was in use
* before this instruction */
unsigned int DstRegAliased:1;
struct rc_dataflow_vector * DstReg;
};
/**
* General functions for manipulating the dataflow structures.
*/
/*@{*/
struct rc_dataflow_ref * rc_dataflow_create_ref(struct radeon_compiler * c,
struct rc_dataflow_vector * vector, struct rc_instruction * inst);
struct rc_dataflow_vector * rc_dataflow_create_vector(struct radeon_compiler * c,
rc_register_file file, unsigned int index, struct rc_instruction * inst);
void rc_dataflow_remove_ref(struct rc_dataflow_ref * ref);
void rc_dataflow_remove_instruction(struct rc_instruction * inst);
/*@}*/
/**
* Compiler passes based on dataflow structures.
*/
/*@{*/
typedef void (*rc_dataflow_mark_outputs_fn)(void * userdata, void * data,
void (*mark_fn)(void * data, unsigned int index, unsigned int mask));
void rc_dataflow_annotate(struct radeon_compiler * c, rc_dataflow_mark_outputs_fn dce, void * userdata);
void rc_dataflow_dealias(struct radeon_compiler * c);
void rc_dataflow_swizzles(struct radeon_compiler * c);
/*@}*/
#endif /* RADEON_DATAFLOW_H */
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