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/*
* Copyright (C) 2019 Intel Corporation. All rights reserved.
* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
*/
#ifndef _WASM_INTERP_H
#define _WASM_INTERP_H
#include "wasm.h"
#ifdef __cplusplus
extern "C" {
#endif
struct WASMModuleInstance;
struct WASMFunctionInstance;
struct WASMExecEnv;
typedef struct WASMInterpFrame {
/* The frame of the caller that are calling the current function. */
struct WASMInterpFrame *prev_frame;
/* The current WASM function. */
struct WASMFunctionInstance *function;
/* Instruction pointer of the bytecode array. */
uint8 *ip;
#if WASM_ENABLE_FAST_JIT != 0
uint8 *jitted_return_addr;
#endif
#if WASM_ENABLE_PERF_PROFILING != 0
uint64 time_started;
#endif
#if WASM_ENABLE_FAST_INTERP != 0
/* Return offset of the first return value of current frame,
the callee will put return values here continuously */
uint32 ret_offset;
uint32 *lp;
uint32 operand[1];
#else
/* Operand stack top pointer of the current frame. The bottom of
the stack is the next cell after the last local variable. */
uint32 *sp_bottom;
uint32 *sp_boundary;
uint32 *sp;
WASMBranchBlock *csp_bottom;
WASMBranchBlock *csp_boundary;
WASMBranchBlock *csp;
/**
* Frame data, the layout is:
* lp: parameters and local variables
* sp_bottom to sp_boundary: wasm operand stack
* csp_bottom to csp_boundary: wasm label stack
* jit spill cache: only available for fast jit
*/
uint32 lp[1];
#endif
} WASMInterpFrame;
/**
* Calculate the size of interpreter area of frame of a function.
*
* @param all_cell_num number of all cells including local variables
* and the working stack slots
*
* @return the size of interpreter area of the frame
*/
static inline unsigned
wasm_interp_interp_frame_size(unsigned all_cell_num)
{
unsigned frame_size;
#if WASM_ENABLE_FAST_INTERP == 0
frame_size = (uint32)offsetof(WASMInterpFrame, lp) + all_cell_num * 4;
#else
frame_size = (uint32)offsetof(WASMInterpFrame, operand) + all_cell_num * 4;
#endif
return align_uint(frame_size, 4);
}
void
wasm_interp_call_wasm(struct WASMModuleInstance *module_inst,
struct WASMExecEnv *exec_env,
struct WASMFunctionInstance *function, uint32 argc,
uint32 argv[]);
#ifdef __cplusplus
}
#endif
#endif /* end of _WASM_INTERP_H */
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