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- x ADDIS
- must not be used for constant formation of unsigned values
- x LCON, UCON
- x D_DCONST
- x shift and RLWIMI, RLD etc
- - dynld
- - 9db from qdb.c (or same)
- x MOVD
- x MOVW/MOVWZ in macro forms for register-register move with sign-extension or zero extension
- -> EXTSW or RLWNM to and
- x CMP vs CMPW/CMPWU
- x getmask -> uvlong
- x 32-bit special registers require MOVW/MOVWZ; others require MOVD
- notes
- ZCON 0
- SCON 16-bit signed
- UCON low 16-bits zero
- ADDCON -8000<= v < 0
- ANDCON 0 <= v <= 0xFFFF
- LCON other
- LECON will be 64 bits
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