Offsets beyond the split bands ride a per-function literal pool the way
the toolchain lays one out: a PC-relative literal load into REGTMP, then
the register-offset access (the pair family adds the base addition), the
pooled words appended after the last instruction behind the UNDEF guard,
deduplicated by value with the sign- and width-aware load selection.
The same differential pass against the corpus exposed three wrong-code
bugs and fixes them: the logical-immediate period marker rode the wrong
position for every element below 64 bits, so the 32-bit forms encoded a
different constant than written; the plain register operand of an
ADD/SUB against SP took the shifted-register form where the toolchain
uses the extended one with the identity extend, silently truncating
through UXTB; and the AUTIA1716 and AUTIB1716 hint constants were the
PACIA and PACIB encodings. An offset sweep across every band boundary
now pins all three against the live oracle.
Assisted-by: GLM 5.3 Flash
The pair encoder derived the imm7 divisor from the width suffix alone, so
the 128-bit FP pairs divided their offsets by eight and encoded twice the
distance. The Q spellings scale by sixteen like every other 128-bit
access; the differential kernel carries them now.
Assisted-by: GLM 5.3 Flash
petrbalvin