FRSp
#define FRTp FRSp
#define FXM FRSp + 1
{"stfdpx", X(31,919), X_MASK, POWER6, POWER7, {FRSp, RA0, RB}},
{"stfdp", OP(61), OP_MASK, POWER6, POWER7|PPCVLE, {FRSp, DS, RA0}},