The C extension's own spellings were names the table carried and the
encoder refused: CLWSP stopped the corpus audit's riscv64 file first.
Thirty-eight mnemonics now encode directly to their halfword, with the
toolchain's operand spellings and validation: the stack loads and stores
pin their base to SP, the register-based loads, stores and arithmetic
carry prime registers, CLUI refuses zero and SP, CADDI4SPN scales by
four, CADDI16SP by sixteen, and CJ, CBEQZ and CBNEZ resolve their N(PC)
targets against the final layout, taking a two-byte placeholder in the
early passes so the offsets stay honest. CAND with an immediate is the
toolchain's C.ANDI spelling. The toolchain's whole C extension testdata
block is a differential test, halfword for halfword, beside a range test
at the toolchain's own boundaries.
Assisted-by: GLM 5.3 Flash
petrbalvin