#ifndef OVM_OVM_H
#define OVM_OVM_H

#include "base.h"

typedef guint32 instruction_t;
typedef enum {
	OP_STYPE = 0x0,
	OP_ADD = 0x1,
	OP_SUB = 0x2,
	OP_MULT = 0x3,
	OP_DIV = 0x4,
	OP_OUT = 0x5,
	OP_PHI = 0x6
} dop_t;
typedef enum {
	SOP_NOOP = 0x0,
	SOP_CMPZ = 0x1,
	SOP_SQRT = 0x2,
	SOP_COPY = 0x3,
	SOP_IN = 0x4
} sop_t;
typedef enum {
	CMP_LTZ = 0x0, /* < */
	CMP_LEZ = 0x1, /* <= */
	CMP_EQZ = 0x2, /* == */
	CMP_GEZ = 0x3, /* >= */
	CMP_GTZ = 0x4  /* > */
} cmp_t;

static inline dop_t instr_dop(instruction_t i) {
	return i >> 28;
}

static inline sop_t instr_sop(instruction_t i) {
	return i >> 24; /* upper bits are 0 */
}

static inline guint instr_dop_r1(instruction_t i) {
	return (i >> 14) & 0x3FFF;
}

static inline guint instr_dop_r2(instruction_t i) {
	return i & 0x3FFF;
}

static inline cmp_t instr_sop_cmp(instruction_t i) {
	return (i >> 21) & 0x7;
}

static inline guint instr_sop_r1(instruction_t i) {
	return i & 0x3FFF;
}

typedef struct {
	gsize limit, used;
	instruction_t *instructions;
	gdouble *values;
	guint32 pc;
} ovm_t;

void ovm_free(ovm_t *ovm);
ovm_t* ovm_load(const gchar *filename);
void ovm_print_c(ovm_t *ovm, const gchar *filename);

#endif