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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.
*
*/
#include "radeon_program.h"
/**
* Initialize a compiler structure with a single mixed clause
* containing all instructions from the source program.
*/
void radeonCompilerInit(
struct radeon_compiler *compiler,
GLcontext *ctx,
struct gl_program *source)
{
struct radeon_clause* clause;
_mesa_memset(compiler, 0, sizeof(*compiler));
compiler->Source = source;
compiler->Ctx = ctx;
compiler->NumTemporaries = source->NumTemporaries;
clause = radeonCompilerInsertClause(compiler, 0, CLAUSE_MIXED);
clause->NumInstructions = 0;
while(source->Instructions[clause->NumInstructions].Opcode != OPCODE_END)
clause->NumInstructions++;
clause->ReservedInstructions = clause->NumInstructions;
clause->Instructions = _mesa_alloc_instructions(clause->NumInstructions);
_mesa_copy_instructions(clause->Instructions, source->Instructions, clause->NumInstructions);
}
/**
* Free all data that is referenced by the compiler structure.
* However, the compiler structure itself is not freed.
*/
void radeonCompilerCleanup(struct radeon_compiler *compiler)
{
radeonCompilerEraseClauses(compiler, 0, compiler->NumClauses);
}
/**
* Allocate and return a unique temporary register.
*/
int radeonCompilerAllocateTemporary(struct radeon_compiler *compiler)
{
if (compiler->NumTemporaries >= 256) {
_mesa_problem(compiler->Ctx, "radeonCompiler: Too many temporaries");
return 0;
}
return compiler->NumTemporaries++;
}
/**
* \p position index of the new clause; later clauses are moved
* \p type of the new clause; one of CLAUSE_XXX
* \return a pointer to the new clause
*/
struct radeon_clause* radeonCompilerInsertClause(
struct radeon_compiler *compiler,
int position, int type)
{
struct radeon_clause* oldClauses = compiler->Clauses;
struct radeon_clause* clause;
assert(position >= 0 && position <= compiler->NumClauses);
compiler->Clauses = (struct radeon_clause *)
_mesa_malloc((compiler->NumClauses+1) * sizeof(struct radeon_clause));
if (oldClauses) {
_mesa_memcpy(compiler->Clauses, oldClauses,
position*sizeof(struct radeon_clause));
_mesa_memcpy(compiler->Clauses+position+1, oldClauses+position,
(compiler->NumClauses - position) * sizeof(struct radeon_clause));
_mesa_free(oldClauses);
}
compiler->NumClauses++;
clause = compiler->Clauses + position;
_mesa_memset(clause, 0, sizeof(*clause));
clause->Type = type;
return clause;
}
/**
* Remove clauses in the range [start, end)
*/
void radeonCompilerEraseClauses(
struct radeon_compiler *compiler,
int start, int end)
{
struct radeon_clause* oldClauses = compiler->Clauses;
int i;
assert(0 <= start);
assert(start <= end);
assert(end <= compiler->NumClauses);
if (end == start)
return;
for(i = start; i < end; ++i) {
struct radeon_clause* clause = oldClauses + i;
_mesa_free_instructions(clause->Instructions, clause->NumInstructions);
}
if (start > 0 || end < compiler->NumClauses) {
compiler->Clauses = (struct radeon_clause*)
_mesa_malloc((compiler->NumClauses+start-end) * sizeof(struct radeon_clause));
_mesa_memcpy(compiler->Clauses, oldClauses,
start * sizeof(struct radeon_clause));
_mesa_memcpy(compiler->Clauses + start, oldClauses + end,
(compiler->NumClauses - end) * sizeof(struct radeon_clause));
compiler->NumClauses -= end - start;
} else {
compiler->Clauses = 0;
compiler->NumClauses = 0;
}
_mesa_free(oldClauses);
}
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