1#if defined(XLF14) || defined(XLFLINUX) 2@PROCESS OPT(0) STRICT(ALL) 3#endif 4 subroutine sradb4 (ido,l1,cc,ch,wa1,wa2,wa3) 5 IMPLICIT REAL(A-H), INTEGER(I-N), REAL(O-Z) 6 dimension cc(ido,4,l1) ,ch(ido,l1,4) , 7 1 wa1(*) ,wa2(*) ,wa3(*) 8 data sqrt2 /1.414213562373095/ 9 do 101 k=1,l1 10 tr1 = cc(1,1,k)-cc(ido,4,k) 11 tr2 = cc(1,1,k)+cc(ido,4,k) 12 tr3 = cc(ido,2,k)+cc(ido,2,k) 13 tr4 = cc(1,3,k)+cc(1,3,k) 14 ch(1,k,1) = tr2+tr3 15 ch(1,k,2) = tr1-tr4 16 ch(1,k,3) = tr2-tr3 17 ch(1,k,4) = tr1+tr4 18 101 continue 19 if (ido-2) 107,105,102 20 102 idp2 = ido+2 21 do 104 k=1,l1 22 do 103 i=3,ido,2 23 ic = idp2-i 24 ti1 = cc(i,1,k)+cc(ic,4,k) 25 ti2 = cc(i,1,k)-cc(ic,4,k) 26 ti3 = cc(i,3,k)-cc(ic,2,k) 27 tr4 = cc(i,3,k)+cc(ic,2,k) 28 tr1 = cc(i-1,1,k)-cc(ic-1,4,k) 29 tr2 = cc(i-1,1,k)+cc(ic-1,4,k) 30 ti4 = cc(i-1,3,k)-cc(ic-1,2,k) 31 tr3 = cc(i-1,3,k)+cc(ic-1,2,k) 32 ch(i-1,k,1) = tr2+tr3 33 cr3 = tr2-tr3 34 ch(i,k,1) = ti2+ti3 35 ci3 = ti2-ti3 36 cr2 = tr1-tr4 37 cr4 = tr1+tr4 38 ci2 = ti1+ti4 39 ci4 = ti1-ti4 40 ch(i-1,k,2) = wa1(i-2)*cr2-wa1(i-1)*ci2 41 ch(i,k,2) = wa1(i-2)*ci2+wa1(i-1)*cr2 42 ch(i-1,k,3) = wa2(i-2)*cr3-wa2(i-1)*ci3 43 ch(i,k,3) = wa2(i-2)*ci3+wa2(i-1)*cr3 44 ch(i-1,k,4) = wa3(i-2)*cr4-wa3(i-1)*ci4 45 ch(i,k,4) = wa3(i-2)*ci4+wa3(i-1)*cr4 46 103 continue 47 104 continue 48 if (mod(ido,2) .eq. 1) return 49 105 continue 50 do 106 k=1,l1 51 ti1 = cc(1,2,k)+cc(1,4,k) 52 ti2 = cc(1,4,k)-cc(1,2,k) 53 tr1 = cc(ido,1,k)-cc(ido,3,k) 54 tr2 = cc(ido,1,k)+cc(ido,3,k) 55 ch(ido,k,1) = tr2+tr2 56 ch(ido,k,2) = sqrt2*(tr1-ti1) 57 ch(ido,k,3) = ti2+ti2 58 ch(ido,k,4) = -sqrt2*(tr1+ti1) 59 106 continue 60 107 return 61 end 62