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opcode: JMP

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This commit is contained in:
dogeystamp 2024-01-06 16:44:19 -05:00
parent 4ee0822e58
commit 159ab62ebf
Signed by: dogeystamp
GPG Key ID: 7225FE3592EFFA38
1 changed files with 8 additions and 1 deletions
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9
src/vm/instruction.rs
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@ -85,7 +85,7 @@ pub fn execute_instruction(vm: &mut VM, instr: u16) {
OpCode::NOT => op_not(vm, instr),
OpCode::LDI => op_ldi(vm, instr),
OpCode::STI => op_sti(vm, instr),
OpCode::JMP => todo!("JMP"),
OpCode::JMP => op_jmp(vm, instr),
OpCode::RES => todo!("RES"),
OpCode::LEA => op_lea(vm, instr),
OpCode::TRAP => op_trap(vm, instr),
@ -169,6 +169,13 @@ fn op_br(vm: &mut VM, instr: u16) {
}
}
fn op_jmp(vm: &mut VM, instr: u16) {
// RET is a special case of this where BaseR is R7
let base_r = (instr >> 6) & 0b111;
vm.registers.pc = vm.registers.get_reg(base_r);
}
////////////////
// Store ops
////////////////