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fix: sign extend imm5

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This commit is contained in:
dogeystamp 2024-01-14 19:16:49 -05:00
parent aab3742158
commit 6cda9912f5
Signed by: dogeystamp
GPG Key ID: 7225FE3592EFFA38
1 changed files with 2 additions and 2 deletions
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4
src/vm/instruction.rs
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@ -243,7 +243,7 @@ fn op_add(vm: &mut VM, instr: u16) {
.wrapping_add(vm.registers.get_reg(sr2));
vm.registers.set_reg_with_cond(dr, res);
} else {
let imm = instr & 0x1f;
let imm = sign_extend(instr & 0x1f, 5);
let res = vm.registers.get_reg(sr1).wrapping_add(imm);
vm.registers.set_reg_with_cond(dr, res);
@ -260,7 +260,7 @@ fn op_and(vm: &mut VM, instr: u16) {
let res = vm.registers.get_reg(sr1) & vm.registers.get_reg(sr2);
vm.registers.set_reg_with_cond(dr, res);
} else {
let imm = instr & 0x1f;
let imm = sign_extend(instr & 0x1f, 5);
let res = vm.registers.get_reg(sr1) & imm;
vm.registers.set_reg_with_cond(dr, res);