emitPrimOp dflags [res] BSwapOp   [w] = emitBSwapCall res w (wordWidth dflags)
emitPrimOp dflags [res] BSwapOp   [w] = emitBSwapCall res w (wordWidth dflags)
emitPrimOp dflags [res] BSwapOp   [w] = emitBSwapCall res w (wordWidth dflags)