52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
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#include "bytecode.h"
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#include "value.h"
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#include "vm.h"
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#include <stdio.h>
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int main(void) {
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VM vm;
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vm_init(&vm);
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/* Example: 0..4 loop */
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Bytecode *bc = bytecode_new();
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int c0 = bytecode_add_constant(bc, make_int(0));
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int c1 = bytecode_add_constant(bc, make_int(1));
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int c5 = bytecode_add_constant(bc, make_int(5));
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// initialize i = 0
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bytecode_add_instruction(bc, OP_LOAD_CONST, c0);
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bytecode_add_instruction(bc, OP_STORE_LOCAL, 0);
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int lbl_start = bc->instr_count;
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// load i
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bytecode_add_instruction(bc, OP_LOAD_LOCAL, 0);
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bytecode_add_instruction(bc, OP_PRINT, 0);
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// i = i + 1
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bytecode_add_instruction(bc, OP_LOAD_LOCAL, 0);
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bytecode_add_instruction(bc, OP_LOAD_CONST, c1);
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bytecode_add_instruction(bc, OP_ADD, 0);
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bytecode_add_instruction(bc, OP_STORE_LOCAL, 0);
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// check i < 5
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bytecode_add_instruction(bc, OP_LOAD_LOCAL, 0);
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bytecode_add_instruction(bc, OP_LOAD_CONST, c5);
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bytecode_add_instruction(bc, OP_LT, 0);
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int jmp_back = bytecode_add_instruction(bc, OP_JUMP_IF_FALSE, 0);
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bytecode_add_instruction(bc, OP_JUMP, lbl_start);
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int end_lbl = bc->instr_count;
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bytecode_set_operand(bc, jmp_back, end_lbl);
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bytecode_add_instruction(bc, OP_HALT, 0);
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vm_run(&vm, bc);
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// flush captured outputs
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vm_clear_output(&vm);
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bytecode_free(bc);
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return 0;
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}
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