539 #define Dblext_setzero(valA,valB,valC,valD)	\  argument
540     Dextallp1(valA) = 0; Dextallp2(valB) = 0;	\
549 #define Dblext_iszero(valA,valB,valC,valD) (Dextallp1(valA)==0 && \  argument
683 #define Dblext_leftshiftby8(valA,valB,valC,valD) \  argument
684     Shiftdouble(Dextallp1(valA),Dextallp2(valB),24,Dextallp1(valA)); \
688 #define Dblext_leftshiftby4(valA,valB,valC,valD) \  argument
689     Shiftdouble(Dextallp1(valA),Dextallp2(valB),28,Dextallp1(valA)); \
693 #define Dblext_leftshiftby3(valA,valB,valC,valD) \  argument
694     Shiftdouble(Dextallp1(valA),Dextallp2(valB),29,Dextallp1(valA)); \
698 #define Dblext_leftshiftby2(valA,valB,valC,valD) \  argument
699     Shiftdouble(Dextallp1(valA),Dextallp2(valB),30,Dextallp1(valA)); \
703 #define Dblext_leftshiftby1(valA,valB,valC,valD) \  argument
704     Shiftdouble(Dextallp1(valA),Dextallp2(valB),31,Dextallp1(valA)); \