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#ifndef FVM_H_
#define FVM_H_
#include <stdint.h>
typedef int64_t fvm_word_t;
typedef double fvm_float_t;;
struct fvm;
// return non-zero if vm should be suspended
typedef int64_t (*fvm_syscall_fn_t)(struct fvm* vm);
struct fvm {
fvm_word_t sp; // stack pointer
fvm_word_t bp; // base pointer
fvm_word_t pc; // programm counter
fvm_word_t rv; // return value
fvm_syscall_fn_t *syscall_table;
};
enum fvm_op {
FVM_OP_SP,
FVM_OP_SSP,
FVM_OP_BP,
FVM_OP_SBP,
FVM_OP_PC,
FVM_OP_RV,
FVM_OP_SRV,
FVM_OP_IMM,
FVM_OP_LD8,
FVM_OP_LD16,
FVM_OP_LD32,
FVM_OP_LD,
FVM_OP_ST8,
FVM_OP_ST16,
FVM_OP_ST32,
FVM_OP_ST,
FVM_OP_DUP,
FVM_OP_POP,
FVM_OP_SWAP,
FVM_OP_OVER,
FVM_OP_ROT,
FVM_OP_ADD,
FVM_OP_SUB,
FVM_OP_DIV,
FVM_OP_MUL,
FVM_OP_MOD,
FVM_OP_SHR,
FVM_OP_SHL,
FVM_OP_SAR,
FVM_OP_AND,
FVM_OP_OR,
FVM_OP_NOT,
FVM_OP_BITAND,
FVM_OP_BITOR,
FVM_OP_XOR,
FVM_OP_INVERT,
FVM_OP_GT,
FVM_OP_LT,
FVM_OP_GE,
FVM_OP_LE,
FVM_OP_EQ,
FVM_OP_NEQ,
FVM_OP_JMP,
FVM_OP_JZ,
FVM_OP_JNZ,
FVM_OP_RET,
FVM_OP_CALL,
FVM_OP_SYSCALL,
FVM_OP_FADD,
FVM_OP_FSUB,
FVM_OP_FMUL,
FVM_OP_FDIV,
FVM_OP_FGE,
FVM_OP_FGT,
FVM_OP_FLE,
FVM_OP_FLT,
FVM_OP_FEQ,
FVM_OP_FNEQ,
FVM_OP_FTI,
FVM_OP_ITF,
FVM_OP_EXIT,
};
int fvm_init(struct fvm *vm, void *code, int64_t stack_size);
int64_t fvm_execute(struct fvm *vm);
void fvm_push(struct fvm *vm, fvm_word_t value);
int64_t fvm_pop(struct fvm *vm);
fvm_float_t fvm_loadf(struct fvm *vm, fvm_word_t addr);
void fvm_storef(struct fvm *vm, fvm_word_t addr, fvm_float_t val);
fvm_word_t fvm_load(struct fvm *vm, fvm_word_t addr);
void fvm_store(struct fvm *vm, fvm_word_t addr, int64_t value);
int32_t fvm_load32(struct fvm *vm, fvm_word_t addr);
void fvm_store32(struct fvm *vm, fvm_word_t addr, int32_t value);
int16_t fvm_load16(struct fvm *vm, fvm_word_t addr);
void fvm_store16(struct fvm *vm, fvm_word_t addr, int16_t value);
int8_t fvm_load8(struct fvm *vm, fvm_word_t addr);
void fvm_store8(struct fvm *vm, fvm_word_t addr, int8_t value);
#endif
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