Function pcrel_offsets

crates/asm-to-binary/src/assembler/encode.rs:338–340

Compute PC-relative (hi20, lo12) for a target address relative to `current_addr`.

(target_addr: u64, current_addr: u64)

fn encode_jal(
    rd: u8,
    target: &str,
    site_local: u64,
    section_name: &str,
    symbols: &super::symbol_table::SymbolTable,
) -> Result<u32, AssemblerError> {