text: /*
  ** Assembler VM interface definitions.
  ** Copyright (C) 2005-2015 Mike Pall. See Copyright Notice in luajit.h
  */
  
  #ifndef _LJ_VM_H
  #define _LJ_VM_H
  
  #include "lj_obj.h"
  
  /* Entry points for ASM parts of VM. */
  LJ_ASMF void lj_vm_call(lua_State *L, TValue *base, int nres1);
  LJ_ASMF int lj_vm_pcall(lua_State *L, TValue *base, int nres1, ptrdiff_t ef);
  typedef TValue *(*lua_CPFunction)(lua_State *L, lua_CFunction func, void *ud);
  LJ_ASMF int lj_vm_cpcall(lua_State *L, lua_CFunction func, void *ud,
  			 lua_CPFunction cp);
  LJ_ASMF int lj_vm_resume(lua_State *L, TValue *base, int nres1, ptrdiff_t ef);
  LJ_ASMF_NORET void LJ_FASTCALL lj_vm_unwind_c(void *cframe, int errcode);
  LJ_ASMF_NORET void LJ_FASTCALL lj_vm_unwind_ff(void *cframe);
  LJ_ASMF void lj_vm_unwind_c_eh(void);
  LJ_ASMF void lj_vm_unwind_ff_eh(void);
  #if LJ_TARGET_X86ORX64
  LJ_ASMF void lj_vm_unwind_rethrow(void);
  #endif
  
  /* Miscellaneous functions. */
  #if LJ_TARGET_X86ORX64
  LJ_ASMF int lj_vm_cpuid(uint32_t f, uint32_t res[4]);
  #endif
  #if LJ_TARGET_PPC
  void lj_vm_cachesync(void *start, void *end);
  #endif
  LJ_ASMF double lj_vm_foldarith(double x, double y, int op);
  #if LJ_HASJIT
  LJ_ASMF double lj_vm_foldfpm(double x, int op);
  #endif
  #if !LJ_ARCH_HASFPU
  /* Declared in lj_obj.h: LJ_ASMF int32_t lj_vm_tobit(double x); */
  #endif
  
  /* Dispatch targets for recording and hooks. */
  LJ_ASMF void lj_vm_record(void);
  LJ_ASMF void lj_vm_inshook(void);
  LJ_ASMF void lj_vm_rethook(void);
  LJ_ASMF void lj_vm_callhook(void);
  LJ_ASMF void lj_vm_profhook(void);
  
  /* Trace exit handling. */
  LJ_ASMF void lj_vm_exit_handler(void);
  LJ_ASMF void lj_vm_exit_interp(void);
  
  /* Internal math helper functions. */
  #if LJ_TARGET_PPC || LJ_TARGET_ARM64
  #define lj_vm_floor	floor
  #define lj_vm_ceil	ceil
  #else
  LJ_ASMF double lj_vm_floor(double);
  LJ_ASMF double lj_vm_ceil(double);
  #if LJ_TARGET_ARM
  LJ_ASMF double lj_vm_floor_sf(double);
  LJ_ASMF double lj_vm_ceil_sf(double);
  #endif
  #endif
  #ifdef LUAJIT_NO_LOG2
  LJ_ASMF double lj_vm_log2(double);
  #else
  #define lj_vm_log2	log2
  #endif
  
  #if LJ_HASJIT
  #if LJ_TARGET_X86ORX64
  LJ_ASMF void lj_vm_floor_sse(void);
  LJ_ASMF void lj_vm_ceil_sse(void);
  LJ_ASMF void lj_vm_trunc_sse(void);
  LJ_ASMF void lj_vm_powi_sse(void);
  #define lj_vm_powi	NULL
  #else
  LJ_ASMF double lj_vm_powi(double, int32_t);
  #endif
  #if LJ_TARGET_PPC || LJ_TARGET_ARM64
  #define lj_vm_trunc	trunc
  #else
  LJ_ASMF double lj_vm_trunc(double);
  #if LJ_TARGET_ARM
  LJ_ASMF double lj_vm_trunc_sf(double);
  #endif
  #endif
  #ifdef LUAJIT_NO_EXP2
  LJ_ASMF double lj_vm_exp2(double);
  #else
  #define lj_vm_exp2	exp2
  #endif
  LJ_ASMF int32_t LJ_FASTCALL lj_vm_modi(int32_t, int32_t);
  #if LJ_HASFFI
  LJ_ASMF int lj_vm_errno(void);
  #endif
  #endif
  
  /* Continuations for metamethods. */
  LJ_ASMF void lj_cont_cat(void);  /* Continue with concatenation. */
  LJ_ASMF void lj_cont_ra(void);  /* Store result in RA from instruction. */
  LJ_ASMF void lj_cont_nop(void);  /* Do nothing, just continue execution. */
  LJ_ASMF void lj_cont_condt(void);  /* Branch if result is true. */
  LJ_ASMF void lj_cont_condf(void);  /* Branch if result is false. */
  LJ_ASMF void lj_cont_hook(void);  /* Continue from hook yield. */
  LJ_ASMF void lj_cont_stitch(void);  /* Trace stitching. */
  
  /* Start of the ASM code. */
  LJ_ASMF char lj_vm_asm_begin[];
  
  /* Bytecode offsets are relative to lj_vm_asm_begin. */
  #define makeasmfunc(ofs)	((ASMFunction)(lj_vm_asm_begin + (ofs)))
  
  #endif
  