Mercurial > hg > octave-lyh
annotate libcruft/fftpack/passb5.f @ 7789:82be108cc558
First attempt at single precision tyeps
* * *
corrections to qrupdate single precision routines
* * *
prefer demotion to single over promotion to double
* * *
Add single precision support to log2 function
* * *
Trivial PROJECT file update
* * *
Cache optimized hermitian/transpose methods
* * *
Add tests for tranpose/hermitian and ChangeLog entry for new transpose code
| author | David Bateman <dbateman@free.fr> |
|---|---|
| date | Sun, 27 Apr 2008 22:34:17 +0200 |
| parents | fccab8e7d35f |
| children |
| rev | line source |
|---|---|
| 2329 | 1 subroutine passb5 (ido,l1,cc,ch,wa1,wa2,wa3,wa4) |
| 2 dimension cc(ido,5,l1) ,ch(ido,l1,5) , | |
| 3 1 wa1(1) ,wa2(1) ,wa3(1) ,wa4(1) | |
|
7789
82be108cc558
First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents:
3176
diff
changeset
|
4 data tr11,ti11,tr12,ti12 /.309016994374947,.951056516295154, |
|
82be108cc558
First attempt at single precision tyeps
David Bateman <dbateman@free.fr>
parents:
3176
diff
changeset
|
5 1-.809016994374947,.587785252292473/ |
| 2329 | 6 if (ido .ne. 2) go to 102 |
| 7 do 101 k=1,l1 | |
| 8 ti5 = cc(2,2,k)-cc(2,5,k) | |
| 9 ti2 = cc(2,2,k)+cc(2,5,k) | |
| 10 ti4 = cc(2,3,k)-cc(2,4,k) | |
| 11 ti3 = cc(2,3,k)+cc(2,4,k) | |
| 12 tr5 = cc(1,2,k)-cc(1,5,k) | |
| 13 tr2 = cc(1,2,k)+cc(1,5,k) | |
| 14 tr4 = cc(1,3,k)-cc(1,4,k) | |
| 15 tr3 = cc(1,3,k)+cc(1,4,k) | |
| 16 ch(1,k,1) = cc(1,1,k)+tr2+tr3 | |
| 17 ch(2,k,1) = cc(2,1,k)+ti2+ti3 | |
| 18 cr2 = cc(1,1,k)+tr11*tr2+tr12*tr3 | |
| 19 ci2 = cc(2,1,k)+tr11*ti2+tr12*ti3 | |
| 20 cr3 = cc(1,1,k)+tr12*tr2+tr11*tr3 | |
| 21 ci3 = cc(2,1,k)+tr12*ti2+tr11*ti3 | |
| 22 cr5 = ti11*tr5+ti12*tr4 | |
| 23 ci5 = ti11*ti5+ti12*ti4 | |
| 24 cr4 = ti12*tr5-ti11*tr4 | |
| 25 ci4 = ti12*ti5-ti11*ti4 | |
| 26 ch(1,k,2) = cr2-ci5 | |
| 27 ch(1,k,5) = cr2+ci5 | |
| 28 ch(2,k,2) = ci2+cr5 | |
| 29 ch(2,k,3) = ci3+cr4 | |
| 30 ch(1,k,3) = cr3-ci4 | |
| 31 ch(1,k,4) = cr3+ci4 | |
| 32 ch(2,k,4) = ci3-cr4 | |
| 33 ch(2,k,5) = ci2-cr5 | |
| 34 101 continue | |
| 35 return | |
| 36 102 do 104 k=1,l1 | |
| 37 do 103 i=2,ido,2 | |
| 38 ti5 = cc(i,2,k)-cc(i,5,k) | |
| 39 ti2 = cc(i,2,k)+cc(i,5,k) | |
| 40 ti4 = cc(i,3,k)-cc(i,4,k) | |
| 41 ti3 = cc(i,3,k)+cc(i,4,k) | |
| 42 tr5 = cc(i-1,2,k)-cc(i-1,5,k) | |
| 43 tr2 = cc(i-1,2,k)+cc(i-1,5,k) | |
| 44 tr4 = cc(i-1,3,k)-cc(i-1,4,k) | |
| 45 tr3 = cc(i-1,3,k)+cc(i-1,4,k) | |
| 46 ch(i-1,k,1) = cc(i-1,1,k)+tr2+tr3 | |
| 47 ch(i,k,1) = cc(i,1,k)+ti2+ti3 | |
| 48 cr2 = cc(i-1,1,k)+tr11*tr2+tr12*tr3 | |
| 49 ci2 = cc(i,1,k)+tr11*ti2+tr12*ti3 | |
| 50 cr3 = cc(i-1,1,k)+tr12*tr2+tr11*tr3 | |
| 51 ci3 = cc(i,1,k)+tr12*ti2+tr11*ti3 | |
| 52 cr5 = ti11*tr5+ti12*tr4 | |
| 53 ci5 = ti11*ti5+ti12*ti4 | |
| 54 cr4 = ti12*tr5-ti11*tr4 | |
| 55 ci4 = ti12*ti5-ti11*ti4 | |
| 56 dr3 = cr3-ci4 | |
| 57 dr4 = cr3+ci4 | |
| 58 di3 = ci3+cr4 | |
| 59 di4 = ci3-cr4 | |
| 60 dr5 = cr2+ci5 | |
| 61 dr2 = cr2-ci5 | |
| 62 di5 = ci2-cr5 | |
| 63 di2 = ci2+cr5 | |
| 64 ch(i-1,k,2) = wa1(i-1)*dr2-wa1(i)*di2 | |
| 65 ch(i,k,2) = wa1(i-1)*di2+wa1(i)*dr2 | |
| 66 ch(i-1,k,3) = wa2(i-1)*dr3-wa2(i)*di3 | |
| 67 ch(i,k,3) = wa2(i-1)*di3+wa2(i)*dr3 | |
| 68 ch(i-1,k,4) = wa3(i-1)*dr4-wa3(i)*di4 | |
| 69 ch(i,k,4) = wa3(i-1)*di4+wa3(i)*dr4 | |
| 70 ch(i-1,k,5) = wa4(i-1)*dr5-wa4(i)*di5 | |
| 71 ch(i,k,5) = wa4(i-1)*di5+wa4(i)*dr5 | |
| 72 103 continue | |
| 73 104 continue | |
| 74 return | |
| 75 end |