summaryrefslogtreecommitdiff
path: root/tcg/optimize.c
diff options
context:
space:
mode:
Diffstat (limited to 'tcg/optimize.c')
-rw-r--r--tcg/optimize.c97
1 files changed, 97 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;
+}