00001 subroutine zpassb5 (ido,l1,cc,ch,wa1,wa2,wa3,wa4)
00002 implicit double precision (a-h,o-z)
00003 dimension cc(ido,5,l1) ,ch(ido,l1,5) ,
00004 1 wa1(1) ,wa2(1) ,wa3(1) ,wa4(1)
00005 data tr11,ti11,tr12,ti12 /.309016994374947d0,.951056516295154d0,
00006 1-.809016994374947d0,.587785252292473d0/
00007 if (ido .ne. 2) go to 102
00008 do 101 k=1,l1
00009 ti5 = cc(2,2,k)-cc(2,5,k)
00010 ti2 = cc(2,2,k)+cc(2,5,k)
00011 ti4 = cc(2,3,k)-cc(2,4,k)
00012 ti3 = cc(2,3,k)+cc(2,4,k)
00013 tr5 = cc(1,2,k)-cc(1,5,k)
00014 tr2 = cc(1,2,k)+cc(1,5,k)
00015 tr4 = cc(1,3,k)-cc(1,4,k)
00016 tr3 = cc(1,3,k)+cc(1,4,k)
00017 ch(1,k,1) = cc(1,1,k)+tr2+tr3
00018 ch(2,k,1) = cc(2,1,k)+ti2+ti3
00019 cr2 = cc(1,1,k)+tr11*tr2+tr12*tr3
00020 ci2 = cc(2,1,k)+tr11*ti2+tr12*ti3
00021 cr3 = cc(1,1,k)+tr12*tr2+tr11*tr3
00022 ci3 = cc(2,1,k)+tr12*ti2+tr11*ti3
00023 cr5 = ti11*tr5+ti12*tr4
00024 ci5 = ti11*ti5+ti12*ti4
00025 cr4 = ti12*tr5-ti11*tr4
00026 ci4 = ti12*ti5-ti11*ti4
00027 ch(1,k,2) = cr2-ci5
00028 ch(1,k,5) = cr2+ci5
00029 ch(2,k,2) = ci2+cr5
00030 ch(2,k,3) = ci3+cr4
00031 ch(1,k,3) = cr3-ci4
00032 ch(1,k,4) = cr3+ci4
00033 ch(2,k,4) = ci3-cr4
00034 ch(2,k,5) = ci2-cr5
00035 101 continue
00036 return
00037 102 do 104 k=1,l1
00038 do 103 i=2,ido,2
00039 ti5 = cc(i,2,k)-cc(i,5,k)
00040 ti2 = cc(i,2,k)+cc(i,5,k)
00041 ti4 = cc(i,3,k)-cc(i,4,k)
00042 ti3 = cc(i,3,k)+cc(i,4,k)
00043 tr5 = cc(i-1,2,k)-cc(i-1,5,k)
00044 tr2 = cc(i-1,2,k)+cc(i-1,5,k)
00045 tr4 = cc(i-1,3,k)-cc(i-1,4,k)
00046 tr3 = cc(i-1,3,k)+cc(i-1,4,k)
00047 ch(i-1,k,1) = cc(i-1,1,k)+tr2+tr3
00048 ch(i,k,1) = cc(i,1,k)+ti2+ti3
00049 cr2 = cc(i-1,1,k)+tr11*tr2+tr12*tr3
00050 ci2 = cc(i,1,k)+tr11*ti2+tr12*ti3
00051 cr3 = cc(i-1,1,k)+tr12*tr2+tr11*tr3
00052 ci3 = cc(i,1,k)+tr12*ti2+tr11*ti3
00053 cr5 = ti11*tr5+ti12*tr4
00054 ci5 = ti11*ti5+ti12*ti4
00055 cr4 = ti12*tr5-ti11*tr4
00056 ci4 = ti12*ti5-ti11*ti4
00057 dr3 = cr3-ci4
00058 dr4 = cr3+ci4
00059 di3 = ci3+cr4
00060 di4 = ci3-cr4
00061 dr5 = cr2+ci5
00062 dr2 = cr2-ci5
00063 di5 = ci2-cr5
00064 di2 = ci2+cr5
00065 ch(i-1,k,2) = wa1(i-1)*dr2-wa1(i)*di2
00066 ch(i,k,2) = wa1(i-1)*di2+wa1(i)*dr2
00067 ch(i-1,k,3) = wa2(i-1)*dr3-wa2(i)*di3
00068 ch(i,k,3) = wa2(i-1)*di3+wa2(i)*dr3
00069 ch(i-1,k,4) = wa3(i-1)*dr4-wa3(i)*di4
00070 ch(i,k,4) = wa3(i-1)*di4+wa3(i)*dr4
00071 ch(i-1,k,5) = wa4(i-1)*dr5-wa4(i)*di5
00072 ch(i,k,5) = wa4(i-1)*di5+wa4(i)*dr5
00073 103 continue
00074 104 continue
00075 return
00076 end
1.7.1
