diff options
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/optimize.c | 97 | ||||
| -rw-r--r-- | tcg/tcg.c | 6 | ||||
| -rw-r--r-- | tcg/tcg.h | 3 |
3 files changed, 106 insertions, 0 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c new file mode 100644 index 0000000000..c7c7da9e34 --- /dev/null +++ b/tcg/optimize.c @@ -0,0 +1,97 @@ +/* + * Optimizations for Tiny Code Generator for QEMU + * + * Copyright (c) 2010 Samsung Electronics. + * Contributed by Kirill Batuzov <batuzovk@ispras.ru> + * + * 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 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 AUTHORS OR COPYRIGHT HOLDERS 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 "config.h" + +#include <stdlib.h> +#include <stdio.h> + +#include "qemu-common.h" +#include "tcg-op.h" + +#if TCG_TARGET_REG_BITS == 64 +#define CASE_OP_32_64(x) \ + glue(glue(case INDEX_op_, x), _i32): \ + glue(glue(case INDEX_op_, x), _i64) +#else +#define CASE_OP_32_64(x) \ + glue(glue(case INDEX_op_, x), _i32) +#endif + +static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, + TCGArg *args, TCGOpDef *tcg_op_defs) +{ + int i, nb_ops, op_index, op, nb_temps, nb_globals; + const TCGOpDef *def; + TCGArg *gen_args; + + nb_temps = s->nb_temps; + nb_globals = s->nb_globals; + + nb_ops = tcg_opc_ptr - gen_opc_buf; + gen_args = args; + for (op_index = 0; op_index < nb_ops; op_index++) { + op = gen_opc_buf[op_index]; + def = &tcg_op_defs[op]; + switch (op) { + case INDEX_op_call: + i = (args[0] >> 16) + (args[0] & 0xffff) + 3; + while (i) { + *gen_args = *args; + args++; + gen_args++; + i--; + } + break; + case INDEX_op_set_label: + case INDEX_op_jmp: + case INDEX_op_br: + CASE_OP_32_64(brcond): + for (i = 0; i < def->nb_args; i++) { + *gen_args = *args; + args++; + gen_args++; + } + break; + default: + for (i = 0; i < def->nb_args; i++) { + gen_args[i] = args[i]; + } + args += def->nb_args; + gen_args += def->nb_args; + break; + } + } + + return gen_args; +} + +TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, + TCGArg *args, TCGOpDef *tcg_op_defs) +{ + TCGArg *res; + res = tcg_constant_folding(s, tcg_opc_ptr, args, tcg_op_defs); + return res; +} @@ -24,6 +24,7 @@ /* define it to use liveness analysis (better code) */ #define USE_LIVENESS_ANALYSIS +#define USE_TCG_OPTIMIZATIONS #include "config.h" @@ -2035,6 +2036,11 @@ static inline int tcg_gen_code_common(TCGContext *s, uint8_t *gen_code_buf, } #endif +#ifdef USE_TCG_OPTIMIZATIONS + gen_opparam_ptr = + tcg_optimize(s, gen_opc_ptr, gen_opparam_buf, tcg_op_defs); +#endif + #ifdef CONFIG_PROFILER s->la_time -= profile_getclock(); #endif @@ -502,6 +502,9 @@ void tcg_gen_callN(TCGContext *s, TCGv_ptr func, unsigned int flags, void tcg_gen_shifti_i64(TCGv_i64 ret, TCGv_i64 arg1, int c, int right, int arith); +TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, TCGArg *args, + TCGOpDef *tcg_op_def); + /* only used for debugging purposes */ void tcg_register_helper(void *func, const char *name); const char *tcg_helper_get_name(TCGContext *s, void *func); |