Function writeback_csrrwi_immediate

crates/virtual-machine/tests/vm_writeback.rs:196–217

()

    let next_pc = writeback(mem_result, &mut regs, &mut csrs).expect("writeback should succeed");

    // Old value returned
    assert_eq!(regs.read_x(5), 0xF00);
    // Bits cleared: 0xF00 & !0x800 = 0x700
    assert_eq!(
        csrs.read(addr::MIE).expect("writeback should succeed"),
        0x700
    );
    assert_eq!(next_pc, 0x8000_0004);
}

#[test]
fn writeback_csrrwi_immediate() {
    let mut regs = Registers::new();
    let mut csrs = CsrFile::new();

    let mem_result = MemResult::Csr {
        funct3: 5, // CSRRWI
        rd: 5,
        rs1_uimm: 7, // Immediate value
        csr: addr::FRM,
        operand: 7,
        old_val: 0,
        next_pc: 0x8000_0004,
    };