mirror of
https://github.com/LuaJIT/LuaJIT.git
synced 2025-02-08 07:34:07 +00:00
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/*
|
|
** Instruction dispatch handling.
|
|
** Copyright (C) 2005-2010 Mike Pall. See Copyright Notice in luajit.h
|
|
*/
|
|
|
|
#ifndef _LJ_DISPATCH_H
|
|
#define _LJ_DISPATCH_H
|
|
|
|
#include "lj_obj.h"
|
|
#include "lj_bc.h"
|
|
#if LJ_HASJIT
|
|
#include "lj_jit.h"
|
|
#endif
|
|
|
|
/* Type of hot counter. Must match the code in the assembler VM. */
|
|
/* 16 bits are sufficient. Only 0.0015% overhead with maximum slot penalty. */
|
|
typedef uint16_t HotCount;
|
|
|
|
/* Number of hot counter hash table entries (must be a power of two). */
|
|
#define HOTCOUNT_SIZE 64
|
|
#define HOTCOUNT_PCMASK ((HOTCOUNT_SIZE-1)*sizeof(HotCount))
|
|
|
|
/* This solves a circular dependency problem -- bump as needed. Sigh. */
|
|
#define GG_NUM_ASMFF 62
|
|
|
|
#define GG_LEN_DDISP (BC__MAX + GG_NUM_ASMFF)
|
|
#define GG_LEN_SDISP BC_FUNCF
|
|
#define GG_LEN_DISP (GG_LEN_DDISP + GG_LEN_SDISP)
|
|
|
|
/* Global state, main thread and extra fields are allocated together. */
|
|
typedef struct GG_State {
|
|
lua_State L; /* Main thread. */
|
|
global_State g; /* Global state. */
|
|
#if LJ_HASJIT
|
|
jit_State J; /* JIT state. */
|
|
HotCount hotcount[HOTCOUNT_SIZE]; /* Hot counters. */
|
|
#endif
|
|
ASMFunction dispatch[GG_LEN_DISP]; /* Instruction dispatch tables. */
|
|
BCIns bcff[GG_NUM_ASMFF]; /* Bytecode for ASM fast functions. */
|
|
} GG_State;
|
|
|
|
#define GG_OFS(field) ((int)offsetof(GG_State, field))
|
|
#define G2GG(gl) ((GG_State *)((char *)(gl) - GG_OFS(g)))
|
|
#define J2GG(j) ((GG_State *)((char *)(j) - GG_OFS(J)))
|
|
#define L2GG(L) (G2GG(G(L)))
|
|
#define J2G(J) (&J2GG(J)->g)
|
|
#define G2J(gl) (&G2GG(gl)->J)
|
|
#define L2J(L) (&L2GG(L)->J)
|
|
#define GG_G2DISP (GG_OFS(dispatch) - GG_OFS(g))
|
|
#define GG_DISP2G (GG_OFS(g) - GG_OFS(dispatch))
|
|
#define GG_DISP2J (GG_OFS(J) - GG_OFS(dispatch))
|
|
#define GG_DISP2HOT (GG_OFS(hotcount) - GG_OFS(dispatch))
|
|
#define GG_DISP2STATIC (GG_LEN_DDISP*(int)sizeof(ASMFunction))
|
|
|
|
#define hotcount_get(gg, pc) \
|
|
(gg)->hotcount[(u32ptr(pc)>>2) & (HOTCOUNT_SIZE-1)]
|
|
#define hotcount_set(gg, pc, val) \
|
|
(hotcount_get((gg), (pc)) = (HotCount)(val))
|
|
|
|
/* Dispatch table management. */
|
|
LJ_FUNC void lj_dispatch_init(GG_State *GG);
|
|
LJ_FUNC void lj_dispatch_init_hotcount(global_State *g);
|
|
LJ_FUNC void lj_dispatch_update(global_State *g);
|
|
|
|
/* Instruction dispatch callback for hooks or when recording. */
|
|
LJ_FUNCA void LJ_FASTCALL lj_dispatch_ins(lua_State *L, const BCIns *pc);
|
|
LJ_FUNCA ASMFunction LJ_FASTCALL lj_dispatch_call(lua_State *L, const BCIns*pc);
|
|
LJ_FUNCA void LJ_FASTCALL lj_dispatch_return(lua_State *L, const BCIns *pc);
|
|
|
|
#endif
|