98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/*
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* Optimizations for Tiny Code Generator for QEMU
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*
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* Copyright (c) 2010 Samsung Electronics.
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* Contributed by Kirill Batuzov <batuzovk@ispras.ru>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "config.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include "qemu-common.h"
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#include "tcg-op.h"
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#if TCG_TARGET_REG_BITS == 64
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#define CASE_OP_32_64(x) \
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glue(glue(case INDEX_op_, x), _i32): \
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glue(glue(case INDEX_op_, x), _i64)
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#else
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#define CASE_OP_32_64(x) \
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glue(glue(case INDEX_op_, x), _i32)
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#endif
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static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr,
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TCGArg *args, TCGOpDef *tcg_op_defs)
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{
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int i, nb_ops, op_index, op, nb_temps, nb_globals;
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const TCGOpDef *def;
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TCGArg *gen_args;
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nb_temps = s->nb_temps;
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nb_globals = s->nb_globals;
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nb_ops = tcg_opc_ptr - gen_opc_buf;
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gen_args = args;
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for (op_index = 0; op_index < nb_ops; op_index++) {
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op = gen_opc_buf[op_index];
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def = &tcg_op_defs[op];
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switch (op) {
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case INDEX_op_call:
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i = (args[0] >> 16) + (args[0] & 0xffff) + 3;
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while (i) {
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*gen_args = *args;
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args++;
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gen_args++;
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i--;
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}
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break;
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case INDEX_op_set_label:
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case INDEX_op_jmp:
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case INDEX_op_br:
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CASE_OP_32_64(brcond):
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for (i = 0; i < def->nb_args; i++) {
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*gen_args = *args;
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args++;
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gen_args++;
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}
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break;
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default:
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for (i = 0; i < def->nb_args; i++) {
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gen_args[i] = args[i];
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}
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args += def->nb_args;
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gen_args += def->nb_args;
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break;
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}
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}
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return gen_args;
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}
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TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr,
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TCGArg *args, TCGOpDef *tcg_op_defs)
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{
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TCGArg *res;
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res = tcg_constant_folding(s, tcg_opc_ptr, args, tcg_op_defs);
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return res;
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}
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