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1 | /* |
2 | * Optimizations for Tiny Code Generator for QEMU | |
3 | * | |
4 | * Copyright (c) 2010 Samsung Electronics. | |
5 | * Contributed by Kirill Batuzov <batuzovk@ispras.ru> | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
23 | * THE SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include "config.h" | |
27 | ||
28 | #include <stdlib.h> | |
29 | #include <stdio.h> | |
30 | ||
31 | #include "qemu-common.h" | |
32 | #include "tcg-op.h" | |
33 | ||
34 | #if TCG_TARGET_REG_BITS == 64 | |
35 | #define CASE_OP_32_64(x) \ | |
36 | glue(glue(case INDEX_op_, x), _i32): \ | |
37 | glue(glue(case INDEX_op_, x), _i64) | |
38 | #else | |
39 | #define CASE_OP_32_64(x) \ | |
40 | glue(glue(case INDEX_op_, x), _i32) | |
41 | #endif | |
42 | ||
43 | static TCGArg *tcg_constant_folding(TCGContext *s, uint16_t *tcg_opc_ptr, | |
44 | TCGArg *args, TCGOpDef *tcg_op_defs) | |
45 | { | |
46 | int i, nb_ops, op_index, op, nb_temps, nb_globals; | |
47 | const TCGOpDef *def; | |
48 | TCGArg *gen_args; | |
49 | ||
50 | nb_temps = s->nb_temps; | |
51 | nb_globals = s->nb_globals; | |
52 | ||
53 | nb_ops = tcg_opc_ptr - gen_opc_buf; | |
54 | gen_args = args; | |
55 | for (op_index = 0; op_index < nb_ops; op_index++) { | |
56 | op = gen_opc_buf[op_index]; | |
57 | def = &tcg_op_defs[op]; | |
58 | switch (op) { | |
59 | case INDEX_op_call: | |
60 | i = (args[0] >> 16) + (args[0] & 0xffff) + 3; | |
61 | while (i) { | |
62 | *gen_args = *args; | |
63 | args++; | |
64 | gen_args++; | |
65 | i--; | |
66 | } | |
67 | break; | |
68 | case INDEX_op_set_label: | |
69 | case INDEX_op_jmp: | |
70 | case INDEX_op_br: | |
71 | CASE_OP_32_64(brcond): | |
72 | for (i = 0; i < def->nb_args; i++) { | |
73 | *gen_args = *args; | |
74 | args++; | |
75 | gen_args++; | |
76 | } | |
77 | break; | |
78 | default: | |
79 | for (i = 0; i < def->nb_args; i++) { | |
80 | gen_args[i] = args[i]; | |
81 | } | |
82 | args += def->nb_args; | |
83 | gen_args += def->nb_args; | |
84 | break; | |
85 | } | |
86 | } | |
87 | ||
88 | return gen_args; | |
89 | } | |
90 | ||
91 | TCGArg *tcg_optimize(TCGContext *s, uint16_t *tcg_opc_ptr, | |
92 | TCGArg *args, TCGOpDef *tcg_op_defs) | |
93 | { | |
94 | TCGArg *res; | |
95 | res = tcg_constant_folding(s, tcg_opc_ptr, args, tcg_op_defs); | |
96 | return res; | |
97 | } |