Function split_mnemonic

crates/asm-to-binary/src/assembler/parser.rs:487–492

(line: &str)

        s.parse::<i64>().ok()
    }
}

// Split `"rd, rest"` into `(rd_str, rest_str)`.
fn parse_two_fields(operands: &str) -> Option<(&str, &str)> {
    let comma = operands.find(',')?;
    Some((operands[..comma].trim(), operands[comma + 1..].trim()))
}

// Parse `"rd, rs"` -> `(rd_reg, rs_reg)`. Used by `mv`.