Mercurial > octave
view liboctave/external/fftpack/passb4.f @ 23434:f4d4d83f15c5
maint: rename cruft/ directory to external/
* liboctave/external: Renamed from liboctave/cruft.
*
* configure.ac: Rename XTRA_CRUFT_SH_LDFLAGS to XTRA_EXTERNAL_SH_LDFLAGS.
Rename CRUFT_DLL_DEFS to EXTERNAL_DLL_DEFS.
* install.txi: Update documentation to refer to liboctave/external.
* HACKING: Update explanation of directory tree.
* liboctave/module.mk: Update build system to include liboctave/external
* liboctave/numeric/module.mk: Update CPPFLAGS to find Faddeeva in external/
directory.
* lo-blas-proto.h, lo-lapack-proto.h: Update comments which referred to cruft
directory.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 24 Apr 2017 21:03:38 -0700 |
parents | liboctave/cruft/fftpack/passb4.f@648dabbb4c6b |
children |
line wrap: on
line source
subroutine passb4 (ido,l1,cc,ch,wa1,wa2,wa3) dimension cc(ido,4,l1) ,ch(ido,l1,4) , 1 wa1(1) ,wa2(1) ,wa3(1) if (ido .ne. 2) go to 102 do 101 k=1,l1 ti1 = cc(2,1,k)-cc(2,3,k) ti2 = cc(2,1,k)+cc(2,3,k) tr4 = cc(2,4,k)-cc(2,2,k) ti3 = cc(2,2,k)+cc(2,4,k) tr1 = cc(1,1,k)-cc(1,3,k) tr2 = cc(1,1,k)+cc(1,3,k) ti4 = cc(1,2,k)-cc(1,4,k) tr3 = cc(1,2,k)+cc(1,4,k) ch(1,k,1) = tr2+tr3 ch(1,k,3) = tr2-tr3 ch(2,k,1) = ti2+ti3 ch(2,k,3) = ti2-ti3 ch(1,k,2) = tr1+tr4 ch(1,k,4) = tr1-tr4 ch(2,k,2) = ti1+ti4 ch(2,k,4) = ti1-ti4 101 continue return 102 do 104 k=1,l1 do 103 i=2,ido,2 ti1 = cc(i,1,k)-cc(i,3,k) ti2 = cc(i,1,k)+cc(i,3,k) ti3 = cc(i,2,k)+cc(i,4,k) tr4 = cc(i,4,k)-cc(i,2,k) tr1 = cc(i-1,1,k)-cc(i-1,3,k) tr2 = cc(i-1,1,k)+cc(i-1,3,k) ti4 = cc(i-1,2,k)-cc(i-1,4,k) tr3 = cc(i-1,2,k)+cc(i-1,4,k) ch(i-1,k,1) = tr2+tr3 cr3 = tr2-tr3 ch(i,k,1) = ti2+ti3 ci3 = ti2-ti3 cr2 = tr1+tr4 cr4 = tr1-tr4 ci2 = ti1+ti4 ci4 = ti1-ti4 ch(i-1,k,2) = wa1(i-1)*cr2-wa1(i)*ci2 ch(i,k,2) = wa1(i-1)*ci2+wa1(i)*cr2 ch(i-1,k,3) = wa2(i-1)*cr3-wa2(i)*ci3 ch(i,k,3) = wa2(i-1)*ci3+wa2(i)*cr3 ch(i-1,k,4) = wa3(i-1)*cr4-wa3(i)*ci4 ch(i,k,4) = wa3(i-1)*ci4+wa3(i)*cr4 103 continue 104 continue return end