1/*
2** Assembler VM interface definitions.
3** Copyright (C) 2005-2021 Mike Pall. See Copyright Notice in luajit.h
4*/
5
6#ifndef _LJ_VM_H
7#define _LJ_VM_H
8
9#include "lj_obj.h"
10
11/* Entry points for ASM parts of VM. */
12LJ_ASMF void lj_vm_call(lua_State *L, TValue *base, int nres1);
13LJ_ASMF int lj_vm_pcall(lua_State *L, TValue *base, int nres1, ptrdiff_t ef);
14typedef TValue *(*lua_CPFunction)(lua_State *L, lua_CFunction func, void *ud);
15LJ_ASMF int lj_vm_cpcall(lua_State *L, lua_CFunction func, void *ud,
16 lua_CPFunction cp);
17LJ_ASMF int lj_vm_resume(lua_State *L, TValue *base, int nres1, ptrdiff_t ef);
18LJ_ASMF_NORET void LJ_FASTCALL lj_vm_unwind_c(void *cframe, int errcode);
19LJ_ASMF_NORET void LJ_FASTCALL lj_vm_unwind_ff(void *cframe);
20#if LJ_ABI_WIN && LJ_TARGET_X86
21LJ_ASMF_NORET void LJ_FASTCALL lj_vm_rtlunwind(void *cframe, void *excptrec,
22 void *unwinder, int errcode);
23#endif
24LJ_ASMF void lj_vm_unwind_c_eh(void);
25LJ_ASMF void lj_vm_unwind_ff_eh(void);
26#if LJ_TARGET_X86ORX64
27LJ_ASMF void lj_vm_unwind_rethrow(void);
28#endif
29#if LJ_TARGET_MIPS
30LJ_ASMF void lj_vm_unwind_stub(void);
31#endif
32
33/* Miscellaneous functions. */
34#if LJ_TARGET_X86ORX64
35LJ_ASMF int lj_vm_cpuid(uint32_t f, uint32_t res[4]);
36#endif
37#if LJ_TARGET_PPC
38void lj_vm_cachesync(void *start, void *end);
39#endif
40LJ_ASMF double lj_vm_foldarith(double x, double y, int op);
41#if LJ_HASJIT
42LJ_ASMF double lj_vm_foldfpm(double x, int op);
43#endif
44#if !LJ_ARCH_HASFPU
45/* Declared in lj_obj.h: LJ_ASMF int32_t lj_vm_tobit(double x); */
46#endif
47
48/* Dispatch targets for recording and hooks. */
49LJ_ASMF void lj_vm_record(void);
50LJ_ASMF void lj_vm_inshook(void);
51LJ_ASMF void lj_vm_rethook(void);
52LJ_ASMF void lj_vm_callhook(void);
53LJ_ASMF void lj_vm_profhook(void);
54
55/* Trace exit handling. */
56LJ_ASMF void lj_vm_exit_handler(void);
57LJ_ASMF void lj_vm_exit_interp(void);
58
59/* Internal math helper functions. */
60#if LJ_TARGET_PPC || LJ_TARGET_ARM64 || (LJ_TARGET_MIPS && LJ_ABI_SOFTFP)
61#define lj_vm_floor floor
62#define lj_vm_ceil ceil
63#else
64LJ_ASMF double lj_vm_floor(double);
65LJ_ASMF double lj_vm_ceil(double);
66#if LJ_TARGET_ARM
67LJ_ASMF double lj_vm_floor_sf(double);
68LJ_ASMF double lj_vm_ceil_sf(double);
69#endif
70#endif
71#ifdef LUAJIT_NO_LOG2
72LJ_ASMF double lj_vm_log2(double);
73#else
74#define lj_vm_log2 log2
75#endif
76#if !(defined(_LJ_DISPATCH_H) && LJ_TARGET_MIPS)
77LJ_ASMF int32_t LJ_FASTCALL lj_vm_modi(int32_t, int32_t);
78#endif
79
80#if LJ_HASJIT
81#if LJ_TARGET_X86ORX64
82LJ_ASMF void lj_vm_floor_sse(void);
83LJ_ASMF void lj_vm_ceil_sse(void);
84LJ_ASMF void lj_vm_trunc_sse(void);
85LJ_ASMF void lj_vm_powi_sse(void);
86#define lj_vm_powi NULL
87#else
88LJ_ASMF double lj_vm_powi(double, int32_t);
89#endif
90#if LJ_TARGET_PPC || LJ_TARGET_ARM64
91#define lj_vm_trunc trunc
92#else
93LJ_ASMF double lj_vm_trunc(double);
94#if LJ_TARGET_ARM
95LJ_ASMF double lj_vm_trunc_sf(double);
96#endif
97#endif
98#if LJ_HASFFI
99LJ_ASMF int lj_vm_errno(void);
100#endif
101#endif
102
103/* Continuations for metamethods. */
104LJ_ASMF void lj_cont_cat(void); /* Continue with concatenation. */
105LJ_ASMF void lj_cont_ra(void); /* Store result in RA from instruction. */
106LJ_ASMF void lj_cont_nop(void); /* Do nothing, just continue execution. */
107LJ_ASMF void lj_cont_condt(void); /* Branch if result is true. */
108LJ_ASMF void lj_cont_condf(void); /* Branch if result is false. */
109LJ_ASMF void lj_cont_hook(void); /* Continue from hook yield. */
110LJ_ASMF void lj_cont_stitch(void); /* Trace stitching. */
111
112/* Start of the ASM code. */
113LJ_ASMF char lj_vm_asm_begin[];
114
115/* Bytecode offsets are relative to lj_vm_asm_begin. */
116#define makeasmfunc(ofs) ((ASMFunction)(lj_vm_asm_begin + (ofs)))
117
118#endif
119