v_mov_b32_sdwa threw 'VOP1 SDWA destination selector ... is not
supported' when a byte source (src0_sel BYTE_0..3) met a partial
destination (dst_sel BYTE_0..3 or WORD_0/1): the VMovB32 rule allowed
only WORD and DWORD sources there. Every src0_sel, src0_sext, dst_sel
and dst_unused combination is now accepted. Translation already follows
RDNA2 for all of them (applyBitSourceModifiers, writeRawU32): the
selected field is zero- or sign-extended, and the result's low bits go
to the dst_sel field with the other bits zeroed, sign-extended above
and zeroed below, or preserved. Reserved selectors, dst_unused 3, and
neg/abs on sub-dword sources still throw.
agc_driver_sdwa_move_selectors runs all 294 combinations as wave32 and
wave64 on the GPU, plus the in-place byte broadcast under a partial
exec mask, which is not checked on subgroups narrower than 32 lanes,
as in the other EXEC-masked execution tests. agc_vop1_sdwa_move_decode
checks the decoded operands and the reserved encodings.
Celegans12