104 lines
4.7 KiB
C
104 lines
4.7 KiB
C
#ifndef ZRE_OPCODES_H
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#define ZRE_OPCODES_H
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#include "common.h"
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typedef union {
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int32_t i; /* Integers */
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float f; /* Float */
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uint32_t u; /* Unsigned integers, also used for pointer address */
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char c[4]; /* 4 Byte char array for string packing */
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} Value;
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typedef struct {
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uint32_t start;
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uint32_t end;
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} Slice;
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#define MAX_REGS 32
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typedef struct {
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Value registers[MAX_REGS]; /* R0-R31 */
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uint32_t rp; /* register pointer (last unused) */
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Slice allocated; /* start and end of global allocated block */
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} Frame;
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#define MEMORY_SIZE 65536
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#define FRAMES_SIZE 32
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#define STACK_SIZE 256
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typedef struct {
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uint32_t pc; /* Program counter */
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uint32_t fp; /* Frame pointer (last allocated value) */
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uint32_t rp; /* Return stack pointer (top of stack) */
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uint32_t mp; /* Memory pointer (last allocated value) */
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uint32_t frames_size;
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Frame frames[FRAMES_SIZE]; /* function call frames */
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uint32_t stack_size;
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Value stack[STACK_SIZE]; /* main stack */
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uint32_t memory_size;
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Value memory[MEMORY_SIZE]; /* memory array */
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} VM;
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typedef enum {
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OP_HALT, /* halt : terminate execution */
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OP_LOADI, /* lodi : dest = next memory location as int */
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OP_LOADU, /* lodu : dest = next memory location as uint */
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OP_LOADF, /* lodf : dest = next memory location as float */
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OP_STOREI, /* stri : next memory location = src1 as int */
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OP_STOREU, /* stru : next memory location = src1 as uint */
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OP_STOREF, /* strf : next memory location = src1 as float */
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OP_PUSHI, /* pshi : push int from register onto the stack */
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OP_PUSHU, /* pshu : push uint from register onto the stack */
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OP_PUSHF, /* pshf : push float from register onto the stack */
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OP_PUSHS, /* pshs : push str ref from register onto the stack and copy str */
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OP_POPI, /* popi : pop int from stack onto the register */
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OP_POPU, /* popu : pop uint from stack onto the register */
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OP_POPF, /* popf : pop float from stack onto the register */
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OP_POPS, /* pops : pop str ref from stack and move/copy to register */
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OP_ADD_INT, /* addi : dest = src1 + src2 */
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OP_SUB_INT, /* subi : dest = src1 - src2 */
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OP_MUL_INT, /* muli : dest = src1 * src2 */
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OP_DIV_INT, /* divi : dest = src1 / src2 */
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OP_JEQ_INT, /* jeqi : jump to address dest if src1 as int == src2 as int */
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OP_JGT_INT, /* jgti : jump to address dest if src1 as int > src2 as int*/
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OP_JLT_INT, /* jlti : jump to address dest if src1 as int < src2 as int */
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OP_JLE_INT, /* jlei : jump to address dest if src1 as int <= src2 as int */
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OP_JGE_INT, /* jgei : jump to address dest if src1 as int >= src2 as int*/
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OP_INT_TO_REAL, /* itor : dest = src1 as f32 */
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OP_ADD_UINT, /* addu : dest = src1 + src2 */
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OP_SUB_UINT, /* subu : dest = src1 - src2 */
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OP_MUL_UINT, /* mulu : dest = src1 * src2 */
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OP_DIV_UINT, /* divu : dest = src1 / src2 */
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OP_JEQ_UINT, /* jequ : jump to address dest if src1 as int == src2 as uint */
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OP_JGT_UINT, /* jgtu : jump to address dest if src1 as int > src2 as uint*/
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OP_JLT_UINT, /* jltu : jump to address dest if src1 as int < src2 as uint */
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OP_JLE_UINT, /* jleu : jump to address dest if src1 as int <= src2 as uint */
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OP_JGE_UINT, /* jgeu : jump to address dest if src1 as int >= src2 as uint*/
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OP_UINT_TO_REAL, /* utor : dest = src1 as f32 */
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OP_ADD_REAL, /* addr : dest = src1 + src2 */
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OP_SUB_REAL, /* subr : dest = src1 - src2 */
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OP_MUL_REAL, /* mulr : dest = src1 * src2 */
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OP_DIV_REAL, /* divr : dest = src1 / src2 */
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OP_JEQ_REAL, /* jeqr : jump to address dest if src1 as real == src2 as real */
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OP_JGE_REAL, /* jgtr : jump to address dest if src1 as real >= src2 as real */
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OP_JGT_REAL, /* jltr : jump to address dest if src1 as real > src2 as real */
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OP_JLT_REAL, /* jler : jump to address dest if src1 as real < src2 as real */
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OP_JLE_REAL, /* jger : jump to address dest if src1 as real <= src2 as real */
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OP_REAL_TO_INT, /* rtoi : dest = src1 as int */
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OP_REAL_TO_UINT, /* rtou : dest = src1 as uint */
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OP_MOV, /* move : dest = src1 */
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OP_JMP, /* jump : jump to address src1 unconditionally */
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OP_CALL, /* call : creates a new frame */
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OP_RETURN, /* retn : returns from a frame to the parent frame */
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OP_INT_TO_STRING, /* itos : dest = src1 as str */
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OP_UINT_TO_STRING, /* utos : dest = src1 as str */
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OP_REAL_TO_STRING, /* rtos : dest = src1 as str */
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OP_READ_STRING, /* gets : dest = gets as str */
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OP_PRINT_STRING, /* puts : write src1 to stdout */
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OP_CMP_STRING, /* cmps : dest = (str == src2) as bool */
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} Opcode;
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/* defines a uint32 opcode */
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#define OP(opcode, a, b, c) ((opcode << 24) | (a << 16) | (b << 8) | c)
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#endif
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