PPC: E500: Implement msgclr
[qemu.git] / translate-all.c
1 /*
2 * Host code generation
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include <stdarg.h>
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <inttypes.h>
24
25 #include "config.h"
26
27 #define NO_CPU_IO_DEFS
28 #include "cpu.h"
29 #include "disas.h"
30 #include "tcg.h"
31 #include "qemu-timer.h"
32
33 /* code generation context */
34 TCGContext tcg_ctx;
35
36 uint16_t gen_opc_buf[OPC_BUF_SIZE];
37 TCGArg gen_opparam_buf[OPPARAM_BUF_SIZE];
38
39 target_ulong gen_opc_pc[OPC_BUF_SIZE];
40 uint16_t gen_opc_icount[OPC_BUF_SIZE];
41 uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
42
43 void cpu_gen_init(void)
44 {
45 tcg_context_init(&tcg_ctx);
46 }
47
48 /* return non zero if the very first instruction is invalid so that
49 the virtual CPU can trigger an exception.
50
51 '*gen_code_size_ptr' contains the size of the generated code (host
52 code).
53 */
54 int cpu_gen_code(CPUState *env, TranslationBlock *tb, int *gen_code_size_ptr)
55 {
56 TCGContext *s = &tcg_ctx;
57 uint8_t *gen_code_buf;
58 int gen_code_size;
59 #ifdef CONFIG_PROFILER
60 int64_t ti;
61 #endif
62
63 #ifdef CONFIG_PROFILER
64 s->tb_count1++; /* includes aborted translations because of
65 exceptions */
66 ti = profile_getclock();
67 #endif
68 tcg_func_start(s);
69
70 gen_intermediate_code(env, tb);
71
72 /* generate machine code */
73 gen_code_buf = tb->tc_ptr;
74 tb->tb_next_offset[0] = 0xffff;
75 tb->tb_next_offset[1] = 0xffff;
76 s->tb_next_offset = tb->tb_next_offset;
77 #ifdef USE_DIRECT_JUMP
78 s->tb_jmp_offset = tb->tb_jmp_offset;
79 s->tb_next = NULL;
80 #else
81 s->tb_jmp_offset = NULL;
82 s->tb_next = tb->tb_next;
83 #endif
84
85 #ifdef CONFIG_PROFILER
86 s->tb_count++;
87 s->interm_time += profile_getclock() - ti;
88 s->code_time -= profile_getclock();
89 #endif
90 gen_code_size = tcg_gen_code(s, gen_code_buf);
91 *gen_code_size_ptr = gen_code_size;
92 #ifdef CONFIG_PROFILER
93 s->code_time += profile_getclock();
94 s->code_in_len += tb->size;
95 s->code_out_len += gen_code_size;
96 #endif
97
98 #ifdef DEBUG_DISAS
99 if (qemu_loglevel_mask(CPU_LOG_TB_OUT_ASM)) {
100 qemu_log("OUT: [size=%d]\n", *gen_code_size_ptr);
101 log_disas(tb->tc_ptr, *gen_code_size_ptr);
102 qemu_log("\n");
103 qemu_log_flush();
104 }
105 #endif
106 return 0;
107 }
108
109 /* The cpu state corresponding to 'searched_pc' is restored.
110 */
111 int cpu_restore_state(TranslationBlock *tb,
112 CPUState *env, unsigned long searched_pc)
113 {
114 TCGContext *s = &tcg_ctx;
115 int j;
116 unsigned long tc_ptr;
117 #ifdef CONFIG_PROFILER
118 int64_t ti;
119 #endif
120
121 #ifdef CONFIG_PROFILER
122 ti = profile_getclock();
123 #endif
124 tcg_func_start(s);
125
126 gen_intermediate_code_pc(env, tb);
127
128 if (use_icount) {
129 /* Reset the cycle counter to the start of the block. */
130 env->icount_decr.u16.low += tb->icount;
131 /* Clear the IO flag. */
132 env->can_do_io = 0;
133 }
134
135 /* find opc index corresponding to search_pc */
136 tc_ptr = (unsigned long)tb->tc_ptr;
137 if (searched_pc < tc_ptr)
138 return -1;
139
140 s->tb_next_offset = tb->tb_next_offset;
141 #ifdef USE_DIRECT_JUMP
142 s->tb_jmp_offset = tb->tb_jmp_offset;
143 s->tb_next = NULL;
144 #else
145 s->tb_jmp_offset = NULL;
146 s->tb_next = tb->tb_next;
147 #endif
148 j = tcg_gen_code_search_pc(s, (uint8_t *)tc_ptr, searched_pc - tc_ptr);
149 if (j < 0)
150 return -1;
151 /* now find start of instruction before */
152 while (gen_opc_instr_start[j] == 0)
153 j--;
154 env->icount_decr.u16.low -= gen_opc_icount[j];
155
156 restore_state_to_opc(env, tb, j);
157
158 #ifdef CONFIG_PROFILER
159 s->restore_time += profile_getclock() - ti;
160 s->restore_count++;
161 #endif
162 return 0;
163 }