NEG
(var->sync & FB_SYNC_HOR_HIGH_ACT) ? POS : NEG;
(var->sync & FB_SYNC_VERT_HIGH_ACT) ? POS : NEG;
(var->sync & FB_SYNC_COMP_HIGH_ACT) ? POS : NEG;
INSN_2(ALU, NEG), \
INSN_2(ALU64, NEG), \
| '-' expr %prec NEG
%left NEG NOT