Merge tag 'block-pull-request' of https://gitlab.com/stefanha/qemu into staging
[qemu.git] / tcg / tcg-internal.h
1 /*
2 * Internal declarations for Tiny Code Generator for QEMU
3 *
4 * Copyright (c) 2008 Fabrice Bellard
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 #ifndef TCG_INTERNAL_H
26 #define TCG_INTERNAL_H
27
28 #ifdef CONFIG_TCG_INTERPRETER
29 #include <ffi.h>
30 #endif
31
32 #define TCG_HIGHWATER 1024
33
34 /*
35 * Describe the calling convention of a given argument type.
36 */
37 typedef enum {
38 TCG_CALL_RET_NORMAL, /* by registers */
39 } TCGCallReturnKind;
40
41 typedef enum {
42 TCG_CALL_ARG_NORMAL, /* by registers (continuing onto stack) */
43 TCG_CALL_ARG_EVEN, /* like normal, but skipping odd slots */
44 TCG_CALL_ARG_EXTEND, /* for i32, as a sign/zero-extended i64 */
45 TCG_CALL_ARG_EXTEND_U, /* ... as a zero-extended i64 */
46 TCG_CALL_ARG_EXTEND_S, /* ... as a sign-extended i64 */
47 } TCGCallArgumentKind;
48
49 typedef struct TCGCallArgumentLoc {
50 TCGCallArgumentKind kind : 8;
51 unsigned arg_slot : 8;
52 unsigned ref_slot : 8;
53 unsigned arg_idx : 4;
54 unsigned tmp_subindex : 2;
55 } TCGCallArgumentLoc;
56
57 /* Avoid "unsigned < 0 is always false" Werror, when iarg_regs is empty. */
58 #define REG_P(L) \
59 ((int)(L)->arg_slot < (int)ARRAY_SIZE(tcg_target_call_iarg_regs))
60
61 typedef struct TCGHelperInfo {
62 void *func;
63 const char *name;
64 #ifdef CONFIG_TCG_INTERPRETER
65 ffi_cif *cif;
66 #endif
67 unsigned typemask : 32;
68 unsigned flags : 8;
69 unsigned nr_in : 8;
70 unsigned nr_out : 8;
71 TCGCallReturnKind out_kind : 8;
72
73 /* Maximum physical arguments are constrained by TCG_TYPE_I128. */
74 TCGCallArgumentLoc in[MAX_CALL_IARGS * (128 / TCG_TARGET_REG_BITS)];
75 } TCGHelperInfo;
76
77 extern TCGContext tcg_init_ctx;
78 extern TCGContext **tcg_ctxs;
79 extern unsigned int tcg_cur_ctxs;
80 extern unsigned int tcg_max_ctxs;
81
82 void tcg_region_init(size_t tb_size, int splitwx, unsigned max_cpus);
83 bool tcg_region_alloc(TCGContext *s);
84 void tcg_region_initial_alloc(TCGContext *s);
85 void tcg_region_prologue_set(TCGContext *s);
86
87 static inline void *tcg_call_func(TCGOp *op)
88 {
89 return (void *)(uintptr_t)op->args[TCGOP_CALLO(op) + TCGOP_CALLI(op)];
90 }
91
92 static inline const TCGHelperInfo *tcg_call_info(TCGOp *op)
93 {
94 return (void *)(uintptr_t)op->args[TCGOP_CALLO(op) + TCGOP_CALLI(op) + 1];
95 }
96
97 static inline unsigned tcg_call_flags(TCGOp *op)
98 {
99 return tcg_call_info(op)->flags;
100 }
101
102 #if TCG_TARGET_REG_BITS == 32
103 static inline TCGv_i32 TCGV_LOW(TCGv_i64 t)
104 {
105 return temp_tcgv_i32(tcgv_i64_temp(t) + HOST_BIG_ENDIAN);
106 }
107 static inline TCGv_i32 TCGV_HIGH(TCGv_i64 t)
108 {
109 return temp_tcgv_i32(tcgv_i64_temp(t) + !HOST_BIG_ENDIAN);
110 }
111 #else
112 extern TCGv_i32 TCGV_LOW(TCGv_i64) QEMU_ERROR("32-bit code path is reachable");
113 extern TCGv_i32 TCGV_HIGH(TCGv_i64) QEMU_ERROR("32-bit code path is reachable");
114 #endif
115
116 #endif /* TCG_INTERNAL_H */