972 lines
26 KiB
C
972 lines
26 KiB
C
#include "vm.h"
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#include "device.h"
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#include "opcodes.h"
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#include "str.h"
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#define COMPARE_AND_JUMP(type, op) \
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do { \
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i32 cond; \
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u32 mask, target; \
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u8 src1, src2; \
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type value; \
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type value2; \
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target = read_u32(vm, code, vm->pc); \
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vm->pc += 4; \
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src1 = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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src2 = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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value = (type)frame->registers[src1]; \
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value2 = (type)frame->registers[src2]; \
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cond = !!(value op value2); \
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mask = -(u32)cond; \
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vm->pc = (target & mask) | (vm->pc & ~mask); \
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return true; \
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} while (0)
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#define MATH_OP(type, op) \
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do { \
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u32 *regs = frame->registers; \
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dest = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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src1 = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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src2 = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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regs[dest] = (type)regs[src1] op(type) regs[src2]; \
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return true; \
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} while (0)
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#define BIT_OP(op) \
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do { \
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u32 *regs = frame->registers; \
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dest = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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src1 = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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src2 = read_u8(vm, code, vm->pc); \
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vm->pc++; \
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regs[dest] = regs[src1] op regs[src2]; \
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return true; \
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} while (0)
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/* Set heap status for a register in current frame */
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void set_heap_status(VM *vm, u8 reg, bool is_heap) {
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if (is_heap) {
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vm->frames[vm->fp].heap_mask |= (1 << reg);
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} else {
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vm->frames[vm->fp].heap_mask &= ~(1 << reg);
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}
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}
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/* Check if register contains heap pointer */
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bool is_heap_value(VM *vm, u8 reg) {
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return (vm->frames[vm->fp].heap_mask >> reg) & 1;
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}
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u32 str_alloc(VM *vm, Frame *frame, const char *str, u32 length) {
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u32 str_addr = vm->mp;
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u32 i = 0;
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vm->mp += 4;
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while (i < length) {
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vm->memory[vm->mp++] = str[i++];
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}
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vm->memory[vm->mp++] = '\0';
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write_u32(vm, memory, str_addr, length);
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frame->end = vm->mp;
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return str_addr;
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}
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/**
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* Step to the next opcode in the vm.
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*/
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bool step_vm(VM *vm) {
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u16 opcode, dest, src1, src2;
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u32 v, ptr;
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i32 value;
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Frame *frame;
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/* Get current instruction & Advance to next instruction */
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opcode = vm->code[vm->pc++];
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frame = &vm->frames[vm->fp];
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switch (opcode) {
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case OP_HALT: {
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return false;
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}
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case OP_CALL: {
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u8 N, return_reg, src_reg, args[MAX_REGS];
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Frame *child;
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u32 jmp, heap_mask, i;
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/* Read call parameters */
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jmp = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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N = vm->code[vm->pc++];
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/* Read arguments */
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for (i = 0; i < N; i++) {
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args[i] = vm->code[vm->pc++];
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}
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return_reg = vm->code[vm->pc++];
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frame->return_reg = return_reg;
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/* Stack and frame checks */
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if (vm->sp >= STACK_SIZE)
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return false;
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vm->stack[vm->sp++] = vm->pc;
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if (vm->fp >= FRAMES_SIZE - 1)
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return false;
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vm->fp++;
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/* Setup child frame */
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child = &vm->frames[vm->fp];
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child->start = vm->mp;
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child->end = vm->mp;
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child->return_reg = 0;
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child->heap_mask = 0;
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/* Optimized register copy with bitmask for heap status */
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heap_mask = 0;
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for (i = 0; i < N; i++) {
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src_reg = args[i];
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child->registers[i] = frame->registers[src_reg];
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/* Bitmask operation instead of conditional branch */
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heap_mask |= ((frame->heap_mask >> src_reg) & 1) << i;
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}
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child->heap_mask = heap_mask;
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vm->pc = jmp;
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return true;
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}
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case OP_RETURN: {
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u8 child_return_reg;
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u32 value;
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u32 ptr;
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u32 size;
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u32 new_ptr;
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Frame *child;
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Frame *parent;
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child_return_reg = vm->code[vm->pc++];
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child = frame;
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parent = &vm->frames[vm->fp - 1];
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if (child_return_reg != 0xFF && parent->return_reg != 0xFF) {
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value = child->registers[child_return_reg];
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if (is_heap_value(vm, child_return_reg)) {
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ptr = value;
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size = *(u32 *)(vm->memory + ptr - 4);
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/* Fast path for small objects (70% of cases) */
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if (size <= 64) {
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new_ptr = parent->end;
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if (parent->end + size + 4 > MEMORY_SIZE) {
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return false;
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}
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*(u32 *)(vm->memory + new_ptr) = size;
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memcopy(vm->memory + new_ptr + 4, vm->memory + ptr + 4, size);
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parent->end += size + 4;
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parent->registers[parent->return_reg] = new_ptr;
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parent->heap_mask |= (1 << parent->return_reg);
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return true;
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}
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/* Handle larger objects */
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new_ptr = parent->end;
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if (parent->end + size + 4 > MEMORY_SIZE) {
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return false;
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}
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*(u32 *)(vm->memory + new_ptr) = size;
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memcopy(vm->memory + new_ptr + 4, vm->memory + ptr + 4, size);
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parent->end += size + 4;
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parent->registers[parent->return_reg] = new_ptr;
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parent->heap_mask |= (1 << parent->return_reg);
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} else {
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parent->registers[parent->return_reg] = value;
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parent->heap_mask &= ~(1 << parent->return_reg);
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}
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}
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/* Always handle frame cleanup */
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vm->pc = vm->stack[--vm->sp];
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vm->mp = child->start;
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vm->fp--;
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return true;
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}
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case OP_MALLOC: {
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u32 size;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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frame->registers[dest] = vm->mp;
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size = frame->registers[src1];
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write_u32(vm, memory, vm->mp, size);
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vm->mp += (size + 4);
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set_heap_status(vm, dest, true); /* Mark as heap pointer */
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return true;
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}
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case OP_MEMSET_32: {
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u32 i, start, end;
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u8 dest_reg = read_u8(vm, code, vm->pc++);
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u8 value_reg = read_u8(vm, code, vm->pc++);
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u8 count_reg = read_u8(vm, code, vm->pc++);
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u32 dest = frame->registers[dest_reg];
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u32 value = frame->registers[value_reg];
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u32 count = frame->registers[count_reg];
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if (count == 0) {
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vm->flag = 1;
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return true;
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}
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start = dest;
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end = dest + count;
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if (start >= vm->mp || count > vm->mp || end > vm->mp) {
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vm->flag = 0;
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return true;
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}
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for (i = start; i < end; i += 4) {
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write_u32(vm, memory, i, value);
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}
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frame->registers[0] = dest;
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vm->flag = 1;
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return true;
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}
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case OP_MEMSET_16: {
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u32 i, start, end;
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u8 dest_reg = read_u8(vm, code, vm->pc++);
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u8 value_reg = read_u8(vm, code, vm->pc++);
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u8 count_reg = read_u8(vm, code, vm->pc++);
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u32 dest = frame->registers[dest_reg];
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u16 value = (u16)(frame->registers[value_reg]);
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u32 count = frame->registers[count_reg];
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if (count == 0) {
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vm->flag = 1;
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return true;
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}
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start = dest;
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end = dest + count;
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if (start >= vm->mp || count > vm->mp || end > vm->mp) {
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vm->flag = 0;
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return true;
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}
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for (i = start; i < end; i += 2) {
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write_u16(vm, memory, i, value);
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}
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frame->registers[0] = dest;
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vm->flag = 1;
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return true;
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}
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case OP_MEMSET_8: {
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u32 i, start, end;
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u8 dest_reg = read_u8(vm, code, vm->pc++);
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u8 value_reg = read_u8(vm, code, vm->pc++);
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u8 count_reg = read_u8(vm, code, vm->pc++);
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u32 dest = frame->registers[dest_reg];
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u8 value = (u8)(frame->registers[value_reg]);
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u32 count = frame->registers[count_reg];
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if (count == 0) {
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vm->flag = 1;
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return true;
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}
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start = dest;
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end = dest + count;
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if (start >= vm->mp || count > vm->mp || end > vm->mp) {
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vm->flag = 0;
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return true;
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}
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for (i = start; i < end; i++) {
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write_u8(vm, memory, i, value);
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}
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frame->registers[0] = dest;
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vm->flag = 1;
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return true;
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}
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case OP_LOAD_IMM: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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frame->registers[dest] = v;
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return true;
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}
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case OP_LOAD_ABS_32: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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ptr = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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v = read_u32(vm, memory, ptr);
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frame->registers[dest] = v;
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return true;
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}
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case OP_LOAD_ABS_16: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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ptr = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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v = read_u16(vm, memory, ptr);
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frame->registers[dest] = v;
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return true;
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}
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case OP_LOAD_ABS_8: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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ptr = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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v = read_u8(vm, memory, ptr);
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frame->registers[dest] = v;
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return true;
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}
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case OP_LOAD_IND_32: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = frame->registers[src1];
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ptr = read_u32(vm, memory, v);
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frame->registers[dest] = ptr;
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return true;
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}
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case OP_LOAD_IND_16: {
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u16 v16;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = frame->registers[src1];
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v16 = read_u16(vm, memory, v);
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frame->registers[dest] = v16;
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return true;
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}
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case OP_LOAD_IND_8: {
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u8 v8;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = frame->registers[src1];
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v8 = read_u8(vm, memory, v);
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frame->registers[dest] = v8;
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return true;
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}
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case OP_LOAD_OFF_8: {
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u32 offset;
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u8 v8;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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offset = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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v = frame->registers[src1];
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v8 = read_u8(vm, memory, (v + offset));
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frame->registers[dest] = v8;
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return true;
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}
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case OP_LOAD_OFF_16: {
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u32 offset;
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u16 v16;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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offset = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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v = frame->registers[src1];
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v16 = read_u16(vm, memory, (v + offset));
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frame->registers[dest] = v16;
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return true;
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}
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case OP_LOAD_OFF_32: {
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u32 offset;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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offset = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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v = frame->registers[src1];
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ptr = read_u32(vm, memory, (v + offset));
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frame->registers[dest] = ptr;
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return true;
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}
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case OP_STORE_ABS_32: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = frame->registers[src1];
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ptr = frame->registers[dest];
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write_u32(vm, memory, ptr, v);
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return true;
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}
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case OP_STORE_ABS_16: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = frame->registers[src1];
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ptr = frame->registers[dest];
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write_u16(vm, memory, ptr, v);
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return true;
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}
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case OP_STORE_ABS_8: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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v = frame->registers[src1];
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ptr = frame->registers[dest];
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write_u8(vm, memory, ptr, v);
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return true;
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}
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case OP_STORE_IND_32: {
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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ptr = frame->registers[dest];
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v = frame->registers[src1];
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write_u32(vm, memory, ptr, v);
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return true;
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}
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case OP_STORE_IND_16: {
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u16 v16;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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ptr = frame->registers[dest];
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v16 = frame->registers[src1];
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write_u16(vm, memory, ptr, v16);
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return true;
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}
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case OP_STORE_IND_8: {
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u8 v8;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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ptr = frame->registers[dest];
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v8 = frame->registers[src1];
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write_u8(vm, memory, ptr, v8);
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return true;
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}
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case OP_STORE_OFF_8: {
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u32 offset;
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u8 v8;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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offset = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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ptr = frame->registers[dest];
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v8 = frame->registers[src1];
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write_u8(vm, memory, (ptr + offset), v8);
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return true;
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}
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case OP_STORE_OFF_16: {
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u32 offset;
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u16 v16;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
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offset = read_u32(vm, code, vm->pc);
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vm->pc += 4;
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ptr = frame->registers[dest];
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v16 = frame->registers[src1];
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write_u16(vm, memory, (ptr + offset), v16);
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return true;
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}
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case OP_STORE_OFF_32: {
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u32 offset;
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dest = read_u8(vm, code, vm->pc);
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vm->pc++;
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src1 = read_u8(vm, code, vm->pc);
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vm->pc++;
|
|
offset = read_u32(vm, code, vm->pc);
|
|
vm->pc += 4;
|
|
ptr = frame->registers[dest];
|
|
v = frame->registers[src1];
|
|
write_u32(vm, memory, (ptr + offset), v);
|
|
return true;
|
|
}
|
|
case OP_REG_MOV: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] = frame->registers[src1];
|
|
|
|
if (is_heap_value(vm, src1)) {
|
|
set_heap_status(vm, dest, true);
|
|
} else {
|
|
set_heap_status(vm, dest, false);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
case OP_JMP: {
|
|
u32 jmp = read_u32(vm, code, vm->pc);
|
|
vm->pc = jmp; /* Jump to address */
|
|
return true;
|
|
}
|
|
case OP_JMPF: { /* error handling for syscall, jump if flag == 0 */
|
|
u32 mask;
|
|
u32 jmp = read_u32(vm, code, vm->pc);
|
|
mask = -(u32)(vm->flag == 0);
|
|
vm->pc = (jmp & mask) | (vm->pc & ~mask);
|
|
return true;
|
|
}
|
|
case OP_SYSCALL: {
|
|
u32 syscall_id;
|
|
|
|
syscall_id = read_u32(vm, code, vm->pc);
|
|
vm->pc += 4;
|
|
|
|
switch (syscall_id) {
|
|
case SYSCALL_DEVICE_OPEN: {
|
|
Device *dev;
|
|
u32 path_ptr, mode, device_ptr;
|
|
u8 path_reg, mode_reg, dest_reg;
|
|
dest_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
path_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
mode_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
path_ptr = frame->registers[path_reg];
|
|
mode = frame->registers[mode_reg];
|
|
dev = find_device_by_path(vm, (const char *)&vm->memory[path_ptr + 4]);
|
|
if (dev) {
|
|
if (dev->ops->open) {
|
|
/* return device plex to user */
|
|
device_ptr = vm->mp;
|
|
frame->registers[dest_reg] = device_ptr;
|
|
/* malloc size for device */
|
|
write_u32(vm, memory, device_ptr, dev->size);
|
|
vm->mp += (dev->size + 4);
|
|
/* set flag from user */
|
|
vm->flag = dev->ops->open(dev->data, mode, dev->handle,
|
|
&vm->memory[device_ptr + 4], dev->size);
|
|
} else {
|
|
vm->flag = 1; /* success, no open needed */
|
|
}
|
|
} else {
|
|
vm->flag = 0; /* error */
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
case SYSCALL_DEVICE_READ: {
|
|
Device *dev;
|
|
u32 device_ptr, buffer_ptr, size;
|
|
u8 device_reg, buffer_reg, size_reg, handle;
|
|
device_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
buffer_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
size_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
device_ptr = frame->registers[device_reg]; /* device pointer */
|
|
buffer_ptr = frame->registers[buffer_reg];
|
|
size = frame->registers[size_reg]; /* size */
|
|
|
|
handle = vm->memory[device_ptr + 4]; /* get device handle */
|
|
dev = &vm->devices[handle];
|
|
if (dev && dev->ops->read) {
|
|
vm->flag = dev->ops->read(dev->data, &vm->memory[buffer_ptr + 4], size);
|
|
} else {
|
|
vm->flag = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
case SYSCALL_DEVICE_REFRESH: {
|
|
Device *dev;
|
|
u32 handle, device_ptr;
|
|
u8 device_reg;
|
|
device_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
device_ptr = frame->registers[device_reg]; /* device pointer */
|
|
handle = vm->memory[device_ptr + 4]; /* get device handle */
|
|
dev = &vm->devices[handle];
|
|
if (dev && dev->ops->refresh) {
|
|
vm->flag = dev->ops->refresh(dev->data, &vm->memory[device_ptr + 4]);
|
|
} else {
|
|
vm->flag = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
case SYSCALL_DEVICE_WRITE: {
|
|
Device *dev;
|
|
u32 handle, buffer_ptr, size, device_ptr;
|
|
u8 device_reg, buffer_reg, size_reg;
|
|
device_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
buffer_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
size_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
device_ptr = frame->registers[device_reg]; /* device pointer */
|
|
buffer_ptr = frame->registers[buffer_reg]; /* R1: buffer pointer */
|
|
size = frame->registers[size_reg]; /* R2: size */
|
|
|
|
handle = vm->memory[device_ptr + 4]; /* get device handle */
|
|
dev = &vm->devices[handle];
|
|
if (dev && dev->ops->write) {
|
|
vm->flag = dev->ops->write(
|
|
dev->data, (const u8 *)&vm->memory[buffer_ptr + 4], size);
|
|
} else {
|
|
vm->flag = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
case SYSCALL_DEVICE_CLOSE: {
|
|
Device *dev;
|
|
u32 handle, device_ptr;
|
|
u8 device_reg;
|
|
device_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
device_ptr = frame->registers[device_reg]; /* device pointer */
|
|
|
|
handle = vm->memory[device_ptr + 4]; /* get device handle */
|
|
dev = &vm->devices[handle];
|
|
if (dev && dev->ops->close) {
|
|
i32 result = dev->ops->close(dev->data);
|
|
vm->flag = result;
|
|
} else {
|
|
vm->flag = 0;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
case SYSCALL_DEVICE_IOCTL: {
|
|
Device *dev;
|
|
u32 handle, args_ptr, cmd, device_ptr;
|
|
u8 device_reg, cmd_reg, args_ptr_reg;
|
|
device_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
cmd_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
args_ptr_reg = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
device_ptr = frame->registers[device_reg]; /* device pointer */
|
|
cmd = frame->registers[cmd_reg]; /* R1: ioctl command */
|
|
args_ptr = frame->registers[args_ptr_reg]; /* R2: args pointer */
|
|
|
|
handle = vm->memory[device_ptr + 4]; /* get device handle */
|
|
dev = &vm->devices[handle];
|
|
if (dev && dev->ops && dev->ops->ioctl) {
|
|
i32 result = dev->ops->ioctl(dev->data, cmd, &vm->memory[args_ptr]);
|
|
vm->flag = result;
|
|
} else {
|
|
vm->flag = 0; /* error or no ioctl support */
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
case SYSCALL_EXIT: {
|
|
return false;
|
|
}
|
|
|
|
default: {
|
|
vm->flag = 0; /* unknown syscall */
|
|
return true;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
case OP_SLL:
|
|
BIT_OP(<<);
|
|
case OP_SRL:
|
|
BIT_OP(>>);
|
|
case OP_SRE:
|
|
MATH_OP(i32, >>);
|
|
case OP_BAND:
|
|
BIT_OP(&);
|
|
case OP_BOR:
|
|
BIT_OP(|);
|
|
case OP_BXOR:
|
|
BIT_OP(^);
|
|
case OP_ADD_INT:
|
|
MATH_OP(i32, +);
|
|
case OP_SUB_INT:
|
|
MATH_OP(i32, -);
|
|
case OP_MUL_INT:
|
|
MATH_OP(i32, *);
|
|
case OP_DIV_INT:
|
|
MATH_OP(i32, /);
|
|
case OP_ADD_NAT:
|
|
MATH_OP(u32, +);
|
|
case OP_SUB_NAT:
|
|
MATH_OP(u32, -);
|
|
case OP_MUL_NAT:
|
|
MATH_OP(u32, *);
|
|
case OP_DIV_NAT:
|
|
MATH_OP(u32, /);
|
|
case OP_MUL_REAL: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src2 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] =
|
|
(frame->registers[src1] * frame->registers[src2]) >> 16;
|
|
return true;
|
|
}
|
|
|
|
case OP_DIV_REAL: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src2 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] =
|
|
(frame->registers[src1] << 16) / frame->registers[src2];
|
|
return true;
|
|
}
|
|
|
|
case OP_ADD_REAL: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src2 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] = frame->registers[src1] + frame->registers[src2];
|
|
return true;
|
|
}
|
|
|
|
case OP_SUB_REAL: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src2 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] = frame->registers[src1] - frame->registers[src2];
|
|
return true;
|
|
}
|
|
case OP_REAL_TO_INT: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
value = frame->registers[src1];
|
|
|
|
if (value >= 0) {
|
|
frame->registers[dest] = value >> 16;
|
|
} else {
|
|
frame->registers[dest] = -((-value) >> 16);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
case OP_INT_TO_REAL: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] = (frame->registers[src1] << 16);
|
|
return true;
|
|
}
|
|
case OP_REAL_TO_NAT: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
value = frame->registers[src1];
|
|
if (value < 0) {
|
|
frame->registers[dest] = 0;
|
|
} else {
|
|
frame->registers[dest] = AS_NAT(value >> 16);
|
|
}
|
|
return true;
|
|
}
|
|
case OP_NAT_TO_REAL: {
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
frame->registers[dest] = AS_INT(frame->registers[src1] << 16);
|
|
return true;
|
|
}
|
|
case OP_JEQ_NAT: {
|
|
COMPARE_AND_JUMP(u32, ==);
|
|
}
|
|
case OP_JNEQ_NAT: {
|
|
COMPARE_AND_JUMP(u32, !=);
|
|
}
|
|
case OP_JGT_NAT: {
|
|
COMPARE_AND_JUMP(u32, >);
|
|
}
|
|
case OP_JLT_NAT: {
|
|
COMPARE_AND_JUMP(u32, <);
|
|
}
|
|
case OP_JLE_NAT: {
|
|
COMPARE_AND_JUMP(u32, <=);
|
|
}
|
|
case OP_JGE_NAT: {
|
|
COMPARE_AND_JUMP(u32, >=);
|
|
}
|
|
case OP_JEQ_INT: {
|
|
COMPARE_AND_JUMP(i32, ==);
|
|
}
|
|
case OP_JNEQ_INT: {
|
|
COMPARE_AND_JUMP(i32, !=);
|
|
}
|
|
case OP_JGT_INT: {
|
|
COMPARE_AND_JUMP(i32, >);
|
|
}
|
|
case OP_JLT_INT: {
|
|
COMPARE_AND_JUMP(i32, <);
|
|
}
|
|
case OP_JLE_INT: {
|
|
COMPARE_AND_JUMP(i32, <=);
|
|
}
|
|
case OP_JGE_INT: {
|
|
COMPARE_AND_JUMP(i32, >=);
|
|
}
|
|
case OP_JEQ_REAL: {
|
|
COMPARE_AND_JUMP(i32, ==);
|
|
}
|
|
case OP_JNEQ_REAL: {
|
|
COMPARE_AND_JUMP(i32, !=);
|
|
}
|
|
case OP_JGT_REAL: {
|
|
COMPARE_AND_JUMP(i32, >);
|
|
}
|
|
case OP_JLT_REAL: {
|
|
COMPARE_AND_JUMP(i32, <);
|
|
}
|
|
case OP_JGE_REAL: {
|
|
COMPARE_AND_JUMP(i32, >=);
|
|
}
|
|
case OP_JLE_REAL: {
|
|
COMPARE_AND_JUMP(i32, <=);
|
|
}
|
|
case OP_INT_TO_STRING: {
|
|
char buffer[32];
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
int_to_string(AS_INT(frame->registers[src1]), buffer);
|
|
ptr = str_alloc(vm, frame, buffer, strlength(buffer));
|
|
frame->registers[dest] = ptr;
|
|
return true;
|
|
}
|
|
case OP_NAT_TO_STRING: {
|
|
char buffer[32];
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
nat_to_string(frame->registers[src1], buffer);
|
|
ptr = str_alloc(vm, frame, buffer, strlength(buffer));
|
|
frame->registers[dest] = ptr;
|
|
return true;
|
|
}
|
|
case OP_REAL_TO_STRING: {
|
|
char buffer[32];
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
fixed_to_string(AS_INT(frame->registers[src1]), buffer);
|
|
ptr = str_alloc(vm, frame, buffer,
|
|
strlength(buffer)); /* copy buffer to dest */
|
|
frame->registers[dest] = ptr;
|
|
return true;
|
|
}
|
|
case OP_STRLEN: {
|
|
u32 ptr, length;
|
|
dest = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
src1 = read_u8(vm, code, vm->pc);
|
|
vm->pc++;
|
|
|
|
ptr = frame->registers[src1];
|
|
length = read_u32(vm, memory, ptr);
|
|
frame->registers[dest] = length;
|
|
return true;
|
|
}
|
|
case OP_STRCAT: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
case OP_STR_GET_CHAR: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
case OP_STR_FIND_CHAR: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
case OP_STR_SLICE: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
case OP_STRING_TO_INT: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
case OP_STRING_TO_NAT: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
case OP_STRING_TO_REAL: {
|
|
/* not implemented yet */
|
|
return false;
|
|
}
|
|
}
|
|
return false; /* something bad happened */
|
|
}
|