Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging
[qemu.git] / tcg / tci / tcg-target.h
1 /*
2 * Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2009, 2011 Stefan Weil
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24
25 /*
26 * This code implements a TCG which does not generate machine code for some
27 * real target machine but which generates virtual machine code for an
28 * interpreter. Interpreted pseudo code is slow, but it works on any host.
29 *
30 * Some remarks might help in understanding the code:
31 *
32 * "target" or "TCG target" is the machine which runs the generated code.
33 * This is different to the usual meaning in QEMU where "target" is the
34 * emulated machine. So normally QEMU host is identical to TCG target.
35 * Here the TCG target is a virtual machine, but this virtual machine must
36 * use the same word size like the real machine.
37 * Therefore, we need both 32 and 64 bit virtual machines (interpreter).
38 */
39
40 #ifndef TCG_TARGET_H
41 #define TCG_TARGET_H
42
43 #define TCG_TARGET_INTERPRETER 1
44 #define TCG_TARGET_INSN_UNIT_SIZE 1
45 #define TCG_TARGET_TLB_DISPLACEMENT_BITS 32
46 #define MAX_CODE_GEN_BUFFER_SIZE ((size_t)-1)
47
48 #if UINTPTR_MAX == UINT32_MAX
49 # define TCG_TARGET_REG_BITS 32
50 #elif UINTPTR_MAX == UINT64_MAX
51 # define TCG_TARGET_REG_BITS 64
52 #else
53 # error Unknown pointer size for tci target
54 #endif
55
56 #ifdef CONFIG_DEBUG_TCG
57 /* Enable debug output. */
58 #define CONFIG_DEBUG_TCG_INTERPRETER
59 #endif
60
61 /* Optional instructions. */
62
63 #define TCG_TARGET_HAS_bswap16_i32 1
64 #define TCG_TARGET_HAS_bswap32_i32 1
65 #define TCG_TARGET_HAS_div_i32 1
66 #define TCG_TARGET_HAS_rem_i32 1
67 #define TCG_TARGET_HAS_ext8s_i32 1
68 #define TCG_TARGET_HAS_ext16s_i32 1
69 #define TCG_TARGET_HAS_ext8u_i32 1
70 #define TCG_TARGET_HAS_ext16u_i32 1
71 #define TCG_TARGET_HAS_andc_i32 0
72 #define TCG_TARGET_HAS_deposit_i32 1
73 #define TCG_TARGET_HAS_extract_i32 0
74 #define TCG_TARGET_HAS_sextract_i32 0
75 #define TCG_TARGET_HAS_extract2_i32 0
76 #define TCG_TARGET_HAS_eqv_i32 0
77 #define TCG_TARGET_HAS_nand_i32 0
78 #define TCG_TARGET_HAS_nor_i32 0
79 #define TCG_TARGET_HAS_clz_i32 0
80 #define TCG_TARGET_HAS_ctz_i32 0
81 #define TCG_TARGET_HAS_ctpop_i32 0
82 #define TCG_TARGET_HAS_neg_i32 1
83 #define TCG_TARGET_HAS_not_i32 1
84 #define TCG_TARGET_HAS_orc_i32 0
85 #define TCG_TARGET_HAS_rot_i32 1
86 #define TCG_TARGET_HAS_movcond_i32 0
87 #define TCG_TARGET_HAS_muls2_i32 0
88 #define TCG_TARGET_HAS_muluh_i32 0
89 #define TCG_TARGET_HAS_mulsh_i32 0
90 #define TCG_TARGET_HAS_goto_ptr 0
91 #define TCG_TARGET_HAS_direct_jump 0
92 #define TCG_TARGET_HAS_qemu_st8_i32 0
93
94 #if TCG_TARGET_REG_BITS == 64
95 #define TCG_TARGET_HAS_extrl_i64_i32 0
96 #define TCG_TARGET_HAS_extrh_i64_i32 0
97 #define TCG_TARGET_HAS_bswap16_i64 1
98 #define TCG_TARGET_HAS_bswap32_i64 1
99 #define TCG_TARGET_HAS_bswap64_i64 1
100 #define TCG_TARGET_HAS_deposit_i64 1
101 #define TCG_TARGET_HAS_extract_i64 0
102 #define TCG_TARGET_HAS_sextract_i64 0
103 #define TCG_TARGET_HAS_extract2_i64 0
104 #define TCG_TARGET_HAS_div_i64 1
105 #define TCG_TARGET_HAS_rem_i64 1
106 #define TCG_TARGET_HAS_ext8s_i64 1
107 #define TCG_TARGET_HAS_ext16s_i64 1
108 #define TCG_TARGET_HAS_ext32s_i64 1
109 #define TCG_TARGET_HAS_ext8u_i64 1
110 #define TCG_TARGET_HAS_ext16u_i64 1
111 #define TCG_TARGET_HAS_ext32u_i64 1
112 #define TCG_TARGET_HAS_andc_i64 0
113 #define TCG_TARGET_HAS_eqv_i64 0
114 #define TCG_TARGET_HAS_nand_i64 0
115 #define TCG_TARGET_HAS_nor_i64 0
116 #define TCG_TARGET_HAS_clz_i64 0
117 #define TCG_TARGET_HAS_ctz_i64 0
118 #define TCG_TARGET_HAS_ctpop_i64 0
119 #define TCG_TARGET_HAS_neg_i64 1
120 #define TCG_TARGET_HAS_not_i64 1
121 #define TCG_TARGET_HAS_orc_i64 0
122 #define TCG_TARGET_HAS_rot_i64 1
123 #define TCG_TARGET_HAS_movcond_i64 0
124 #define TCG_TARGET_HAS_muls2_i64 0
125 #define TCG_TARGET_HAS_add2_i32 0
126 #define TCG_TARGET_HAS_sub2_i32 0
127 #define TCG_TARGET_HAS_mulu2_i32 0
128 #define TCG_TARGET_HAS_add2_i64 0
129 #define TCG_TARGET_HAS_sub2_i64 0
130 #define TCG_TARGET_HAS_mulu2_i64 0
131 #define TCG_TARGET_HAS_muluh_i64 0
132 #define TCG_TARGET_HAS_mulsh_i64 0
133 #else
134 #define TCG_TARGET_HAS_mulu2_i32 1
135 #endif /* TCG_TARGET_REG_BITS == 64 */
136
137 /* Number of registers available. */
138 #define TCG_TARGET_NB_REGS 16
139
140 /* List of registers which are used by TCG. */
141 typedef enum {
142 TCG_REG_R0 = 0,
143 TCG_REG_R1,
144 TCG_REG_R2,
145 TCG_REG_R3,
146 TCG_REG_R4,
147 TCG_REG_R5,
148 TCG_REG_R6,
149 TCG_REG_R7,
150 TCG_REG_R8,
151 TCG_REG_R9,
152 TCG_REG_R10,
153 TCG_REG_R11,
154 TCG_REG_R12,
155 TCG_REG_R13,
156 TCG_REG_R14,
157 TCG_REG_R15,
158
159 TCG_AREG0 = TCG_REG_R14,
160 TCG_REG_CALL_STACK = TCG_REG_R15,
161 } TCGReg;
162
163 /* Used for function call generation. */
164 #define TCG_TARGET_CALL_STACK_OFFSET 0
165 #define TCG_TARGET_STACK_ALIGN 16
166
167 #define HAVE_TCG_QEMU_TB_EXEC
168
169 /* We could notice __i386__ or __s390x__ and reduce the barriers depending
170 on the host. But if you want performance, you use the normal backend.
171 We prefer consistency across hosts on this. */
172 #define TCG_TARGET_DEFAULT_MO (0)
173
174 #define TCG_TARGET_HAS_MEMORY_BSWAP 1
175
176 /* not defined -- call should be eliminated at compile time */
177 void tb_target_set_jmp_target(uintptr_t, uintptr_t, uintptr_t, uintptr_t);
178
179 #endif /* TCG_TARGET_H */