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psblas:

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krylov/psb_ccgr.f90
 krylov/psb_dcgr.f90
 krylov/psb_scgr.f90
 krylov/psb_zcgr.f90

Cosmetic changes
psblas3-pattern
Salvatore Filippone 9 years ago
parent 5edd786cc6
commit c83985fe16
4 changed files with 396 additions and 436 deletions
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208
krylov/psb_ccgr.f90
Unescape Escape View File

@ -112,8 +112,8 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
use psb_c_krylov_conv_mod
use psb_krylov_mod
implicit none
type(psb_cspmat_type), intent(in) :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(psb_cprec_type), intent(inout) :: prec
@ -124,12 +124,12 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst, istop
integer(psb_ipk_), Optional, Intent(out) :: iter
real(psb_spk_), Optional, Intent(out) :: err
! = local data
! = local data
complex(psb_spk_), allocatable :: alpha(:), h(:,:)
type(psb_c_vect_type), allocatable :: z(:), c(:), c_scale(:)
type(psb_c_vect_type) :: r
real(psb_dpk_) :: r_norm, b_norm, a_norm, x_norm, derr
real(psb_dpk_) :: r_norm, b_norm, a_norm, derr
integer(psb_ipk_) :: n_col, mglob, naux, err_act
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_ipk_) :: np, me, ictxt
@ -140,14 +140,14 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
type(psb_itconv_type) :: stopdat
character(len=*), parameter :: methdname='CGR'
integer(psb_ipk_) ::int_err(5)
info = psb_success_
info = psb_success_
name = 'psb_ccgr'
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
if (.not.allocated(b%v)) then
info = psb_err_invalid_vect_state_
@ -159,21 +159,21 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
endif
mglob = desc_a%get_global_rows()
n_col = desc_a%get_local_cols()
if (present(istop)) then
istop_ = istop
else
istop_ = 2
endif
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
info=psb_err_invalid_istop_
int_err(1)=istop_
@ -181,8 +181,8 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
call psb_chkvect(mglob,ione,x%get_nrows(),ione,ione,desc_a,info)
if (info == psb_success_)&
& call psb_chkvect(mglob,ione,b%get_nrows(),ione,ione,desc_a,info)
@ -191,19 +191,19 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,a_err='psb_chkvect on X/B')
goto 9999
end if
if (present(itmax)) then
itmax_ = itmax
else
itmax_ = 1000
endif
if (present(itrace)) then
itrace_ = itrace
else
itrace_ = 0
end if
if (present(irst)) then
nl = irst
if (debug_level >= psb_debug_ext_) &
@ -215,7 +215,7 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
& write(debug_unit,*) me,' ',trim(name),&
& ' not present: irst: ',irst,nl
endif
if (nl <=0 ) then
info=psb_err_invalid_istop_
int_err(1)=nl
@ -223,54 +223,44 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
naux=4*n_col
allocate(aux(naux),h(nl+1,nl+1),&
&c_scale(nl+1),c(nl+1),z(nl+1), alpha(nl+1), stat=info)
h = czero
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
x_norm = psb_normi(x, desc_a, info)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
if (istop_ == 2) then
b_norm = psb_norm2(b, desc_a, info)
else if (istop_ == 1) then
a_norm = psb_spnrmi(a,desc_a,info)
b_norm = psb_normi(b, desc_a, info)
endif
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
restart: do
if (itx>= itmax_) exit restart
h = czero
it = 0
! compute r0 = b-ax0
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geaxpby(cone, b, czero, r, desc_a, info)
call psb_spmm(-cone,a,x,cone,r,desc_a,info,work=aux)
if (info /= psb_success_) then
@ -278,65 +268,65 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
end if
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
! if (info /= psb_success_) Then
! call psb_errpush(psb_err_from_subroutine_non_,name)
! goto 9999
! End If
nrst = nrst + 1
nrst = nrst + 1
iteration: do
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(cone,a,z(j),czero,c(1),desc_a,info,work=aux)
do i =1, j - 1
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(cone,a,z(j),czero,c(1),desc_a,info,work=aux)
do i =1, j - 1
h(i,j) = psb_gedot(c_scale(i), c(i), desc_a, info)
call psb_geaxpby(cone, c(i), czero, c(i+1), desc_a, info)
call psb_geaxpby(-h(i,j), c_scale(i), cone, c(i+1), desc_a, info)
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = cone/h(j,j)
call psb_geaxpby(hjj, c(j), czero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(cone, r, czero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), cone, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call ctrsm('l','u','n','n',m,1,cone,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(czero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), cone, x, desc_a, info)
enddo
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = cone/h(j,j)
call psb_geaxpby(hjj, c(j), czero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(cone, r, czero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), cone, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call ctrsm('l','u','n','n',m,1,cone,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(czero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), cone, x, desc_a, info)
enddo
end do restart
m = j
!Compute solution
@ -347,38 +337,38 @@ subroutine psb_ccgr_vect(a,prec,b,x,eps,desc_a,info,&
enddo
iter = j
call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
if (present(err)) err = derr
if (info == psb_success_) call psb_gefree(r,desc_a,info)
do j = 1,m
if (info == psb_success_) call psb_gefree(z(j),desc_a,info)
if (info == psb_success_) call psb_gefree(c_scale(j),desc_a,info)
enddo
do i =1,nl+1
if (info == psb_success_) call psb_gefree(c(i),desc_a,info)
end do
if (info == psb_success_) deallocate(aux,h,c_scale,z,c,alpha,stat=info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine psb_ccgr_vect

208
krylov/psb_dcgr.f90
Unescape Escape View File

@ -112,8 +112,8 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
use psb_d_krylov_conv_mod
use psb_krylov_mod
implicit none
type(psb_dspmat_type), intent(in) :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(psb_dprec_type), intent(inout) :: prec
@ -124,12 +124,12 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst, istop
integer(psb_ipk_), Optional, Intent(out) :: iter
real(psb_dpk_), Optional, Intent(out) :: err
! = local data
! = local data
real(psb_dpk_), allocatable :: alpha(:), h(:,:)
type(psb_d_vect_type), allocatable :: z(:), c(:), c_scale(:)
type(psb_d_vect_type) :: r
real(psb_dpk_) :: r_norm, b_norm, a_norm, x_norm, derr
real(psb_dpk_) :: r_norm, b_norm, a_norm, derr
integer(psb_ipk_) :: n_col, mglob, naux, err_act
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_ipk_) :: np, me, ictxt
@ -140,14 +140,14 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
type(psb_itconv_type) :: stopdat
character(len=*), parameter :: methdname='CGR'
integer(psb_ipk_) ::int_err(5)
info = psb_success_
info = psb_success_
name = 'psb_dcgr'
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
if (.not.allocated(b%v)) then
info = psb_err_invalid_vect_state_
@ -159,21 +159,21 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
endif
mglob = desc_a%get_global_rows()
n_col = desc_a%get_local_cols()
if (present(istop)) then
istop_ = istop
else
istop_ = 2
endif
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
info=psb_err_invalid_istop_
int_err(1)=istop_
@ -181,8 +181,8 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
call psb_chkvect(mglob,ione,x%get_nrows(),ione,ione,desc_a,info)
if (info == psb_success_)&
& call psb_chkvect(mglob,ione,b%get_nrows(),ione,ione,desc_a,info)
@ -191,19 +191,19 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,a_err='psb_chkvect on X/B')
goto 9999
end if
if (present(itmax)) then
itmax_ = itmax
else
itmax_ = 1000
endif
if (present(itrace)) then
itrace_ = itrace
else
itrace_ = 0
end if
if (present(irst)) then
nl = irst
if (debug_level >= psb_debug_ext_) &
@ -215,7 +215,7 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
& write(debug_unit,*) me,' ',trim(name),&
& ' not present: irst: ',irst,nl
endif
if (nl <=0 ) then
info=psb_err_invalid_istop_
int_err(1)=nl
@ -223,54 +223,44 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
naux=4*n_col
allocate(aux(naux),h(nl+1,nl+1),&
&c_scale(nl+1),c(nl+1),z(nl+1), alpha(nl+1), stat=info)
h = dzero
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
x_norm = psb_normi(x, desc_a, info)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
if (istop_ == 2) then
b_norm = psb_norm2(b, desc_a, info)
else if (istop_ == 1) then
a_norm = psb_spnrmi(a,desc_a,info)
b_norm = psb_normi(b, desc_a, info)
endif
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
restart: do
if (itx>= itmax_) exit restart
h = dzero
it = 0
! compute r0 = b-ax0
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geaxpby(done, b, dzero, r, desc_a, info)
call psb_spmm(-done,a,x,done,r,desc_a,info,work=aux)
if (info /= psb_success_) then
@ -278,65 +268,65 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
end if
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
! if (info /= psb_success_) Then
! call psb_errpush(psb_err_from_subroutine_non_,name)
! goto 9999
! End If
nrst = nrst + 1
nrst = nrst + 1
iteration: do
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(done,a,z(j),dzero,c(1),desc_a,info,work=aux)
do i =1, j - 1
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(done,a,z(j),dzero,c(1),desc_a,info,work=aux)
do i =1, j - 1
h(i,j) = psb_gedot(c_scale(i), c(i), desc_a, info)
call psb_geaxpby(done, c(i), dzero, c(i+1), desc_a, info)
call psb_geaxpby(-h(i,j), c_scale(i), done, c(i+1), desc_a, info)
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = done/h(j,j)
call psb_geaxpby(hjj, c(j), dzero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(done, r, dzero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), done, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call dtrsm('l','u','n','n',m,1,done,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(dzero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), done, x, desc_a, info)
enddo
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = done/h(j,j)
call psb_geaxpby(hjj, c(j), dzero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(done, r, dzero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), done, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call dtrsm('l','u','n','n',m,1,done,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(dzero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), done, x, desc_a, info)
enddo
end do restart
m = j
!Compute solution
@ -347,38 +337,38 @@ subroutine psb_dcgr_vect(a,prec,b,x,eps,desc_a,info,&
enddo
iter = j
call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
if (present(err)) err = derr
if (info == psb_success_) call psb_gefree(r,desc_a,info)
do j = 1,m
if (info == psb_success_) call psb_gefree(z(j),desc_a,info)
if (info == psb_success_) call psb_gefree(c_scale(j),desc_a,info)
enddo
do i =1,nl+1
if (info == psb_success_) call psb_gefree(c(i),desc_a,info)
end do
if (info == psb_success_) deallocate(aux,h,c_scale,z,c,alpha,stat=info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine psb_dcgr_vect

208
krylov/psb_scgr.f90
Unescape Escape View File

@ -112,8 +112,8 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
use psb_s_krylov_conv_mod
use psb_krylov_mod
implicit none
type(psb_sspmat_type), intent(in) :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(psb_sprec_type), intent(inout) :: prec
@ -124,12 +124,12 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst, istop
integer(psb_ipk_), Optional, Intent(out) :: iter
real(psb_spk_), Optional, Intent(out) :: err
! = local data
! = local data
real(psb_spk_), allocatable :: alpha(:), h(:,:)
type(psb_s_vect_type), allocatable :: z(:), c(:), c_scale(:)
type(psb_s_vect_type) :: r
real(psb_dpk_) :: r_norm, b_norm, a_norm, x_norm, derr
real(psb_dpk_) :: r_norm, b_norm, a_norm, derr
integer(psb_ipk_) :: n_col, mglob, naux, err_act
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_ipk_) :: np, me, ictxt
@ -140,14 +140,14 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
type(psb_itconv_type) :: stopdat
character(len=*), parameter :: methdname='CGR'
integer(psb_ipk_) ::int_err(5)
info = psb_success_
info = psb_success_
name = 'psb_scgr'
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
if (.not.allocated(b%v)) then
info = psb_err_invalid_vect_state_
@ -159,21 +159,21 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
endif
mglob = desc_a%get_global_rows()
n_col = desc_a%get_local_cols()
if (present(istop)) then
istop_ = istop
else
istop_ = 2
endif
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
info=psb_err_invalid_istop_
int_err(1)=istop_
@ -181,8 +181,8 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
call psb_chkvect(mglob,ione,x%get_nrows(),ione,ione,desc_a,info)
if (info == psb_success_)&
& call psb_chkvect(mglob,ione,b%get_nrows(),ione,ione,desc_a,info)
@ -191,19 +191,19 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,a_err='psb_chkvect on X/B')
goto 9999
end if
if (present(itmax)) then
itmax_ = itmax
else
itmax_ = 1000
endif
if (present(itrace)) then
itrace_ = itrace
else
itrace_ = 0
end if
if (present(irst)) then
nl = irst
if (debug_level >= psb_debug_ext_) &
@ -215,7 +215,7 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
& write(debug_unit,*) me,' ',trim(name),&
& ' not present: irst: ',irst,nl
endif
if (nl <=0 ) then
info=psb_err_invalid_istop_
int_err(1)=nl
@ -223,54 +223,44 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
naux=4*n_col
allocate(aux(naux),h(nl+1,nl+1),&
&c_scale(nl+1),c(nl+1),z(nl+1), alpha(nl+1), stat=info)
h = szero
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
x_norm = psb_normi(x, desc_a, info)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
if (istop_ == 2) then
b_norm = psb_norm2(b, desc_a, info)
else if (istop_ == 1) then
a_norm = psb_spnrmi(a,desc_a,info)
b_norm = psb_normi(b, desc_a, info)
endif
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
restart: do
if (itx>= itmax_) exit restart
h = szero
it = 0
! compute r0 = b-ax0
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geaxpby(sone, b, szero, r, desc_a, info)
call psb_spmm(-sone,a,x,sone,r,desc_a,info,work=aux)
if (info /= psb_success_) then
@ -278,65 +268,65 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
end if
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
! if (info /= psb_success_) Then
! call psb_errpush(psb_err_from_subroutine_non_,name)
! goto 9999
! End If
nrst = nrst + 1
nrst = nrst + 1
iteration: do
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(sone,a,z(j),szero,c(1),desc_a,info,work=aux)
do i =1, j - 1
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(sone,a,z(j),szero,c(1),desc_a,info,work=aux)
do i =1, j - 1
h(i,j) = psb_gedot(c_scale(i), c(i), desc_a, info)
call psb_geaxpby(sone, c(i), szero, c(i+1), desc_a, info)
call psb_geaxpby(-h(i,j), c_scale(i), sone, c(i+1), desc_a, info)
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = sone/h(j,j)
call psb_geaxpby(hjj, c(j), szero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(sone, r, szero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), sone, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call strsm('l','u','n','n',m,1,sone,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(szero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), sone, x, desc_a, info)
enddo
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = sone/h(j,j)
call psb_geaxpby(hjj, c(j), szero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(sone, r, szero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), sone, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call strsm('l','u','n','n',m,1,sone,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(szero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), sone, x, desc_a, info)
enddo
end do restart
m = j
!Compute solution
@ -347,38 +337,38 @@ subroutine psb_scgr_vect(a,prec,b,x,eps,desc_a,info,&
enddo
iter = j
call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
if (present(err)) err = derr
if (info == psb_success_) call psb_gefree(r,desc_a,info)
do j = 1,m
if (info == psb_success_) call psb_gefree(z(j),desc_a,info)
if (info == psb_success_) call psb_gefree(c_scale(j),desc_a,info)
enddo
do i =1,nl+1
if (info == psb_success_) call psb_gefree(c(i),desc_a,info)
end do
if (info == psb_success_) deallocate(aux,h,c_scale,z,c,alpha,stat=info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine psb_scgr_vect

208
krylov/psb_zcgr.f90
Unescape Escape View File

@ -112,8 +112,8 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
use psb_z_krylov_conv_mod
use psb_krylov_mod
implicit none
type(psb_zspmat_type), intent(in) :: a
Type(psb_desc_type), Intent(in) :: desc_a
class(psb_zprec_type), intent(inout) :: prec
@ -124,12 +124,12 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
integer(psb_ipk_), Optional, Intent(in) :: itmax, itrace, irst, istop
integer(psb_ipk_), Optional, Intent(out) :: iter
real(psb_dpk_), Optional, Intent(out) :: err
! = local data
! = local data
complex(psb_dpk_), allocatable :: alpha(:), h(:,:)
type(psb_z_vect_type), allocatable :: z(:), c(:), c_scale(:)
type(psb_z_vect_type) :: r
real(psb_dpk_) :: r_norm, b_norm, a_norm, x_norm, derr
real(psb_dpk_) :: r_norm, b_norm, a_norm, derr
integer(psb_ipk_) :: n_col, mglob, naux, err_act
integer(psb_ipk_) :: debug_level, debug_unit
integer(psb_ipk_) :: np, me, ictxt
@ -140,14 +140,14 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
type(psb_itconv_type) :: stopdat
character(len=*), parameter :: methdname='CGR'
integer(psb_ipk_) ::int_err(5)
info = psb_success_
info = psb_success_
name = 'psb_zcgr'
call psb_erractionsave(err_act)
debug_unit = psb_get_debug_unit()
debug_level = psb_get_debug_level()
ictxt = desc_a%get_context()
call psb_info(ictxt, me, np)
if (.not.allocated(b%v)) then
info = psb_err_invalid_vect_state_
@ -159,21 +159,21 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
endif
mglob = desc_a%get_global_rows()
n_col = desc_a%get_local_cols()
if (present(istop)) then
istop_ = istop
else
istop_ = 2
endif
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
!
! ISTOP_ = 1: Normwise backward error, infinity norm
! ISTOP_ = 2: ||r||/||b||, 2-norm
!
if ((istop_ < 1 ).or.(istop_ > 2 ) ) then
info=psb_err_invalid_istop_
int_err(1)=istop_
@ -181,8 +181,8 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
call psb_chkvect(mglob,ione,x%get_nrows(),ione,ione,desc_a,info)
if (info == psb_success_)&
& call psb_chkvect(mglob,ione,b%get_nrows(),ione,ione,desc_a,info)
@ -191,19 +191,19 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,a_err='psb_chkvect on X/B')
goto 9999
end if
if (present(itmax)) then
itmax_ = itmax
else
itmax_ = 1000
endif
if (present(itrace)) then
itrace_ = itrace
else
itrace_ = 0
end if
if (present(irst)) then
nl = irst
if (debug_level >= psb_debug_ext_) &
@ -215,7 +215,7 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
& write(debug_unit,*) me,' ',trim(name),&
& ' not present: irst: ',irst,nl
endif
if (nl <=0 ) then
info=psb_err_invalid_istop_
int_err(1)=nl
@ -223,54 +223,44 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name,i_err=int_err)
goto 9999
endif
naux=4*n_col
allocate(aux(naux),h(nl+1,nl+1),&
&c_scale(nl+1),c(nl+1),z(nl+1), alpha(nl+1), stat=info)
h = zzero
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
x_norm = psb_normi(x, desc_a, info)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
if (istop_ == 2) then
b_norm = psb_norm2(b, desc_a, info)
else if (istop_ == 1) then
a_norm = psb_spnrmi(a,desc_a,info)
b_norm = psb_normi(b, desc_a, info)
endif
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
call psb_geasb(r, desc_a,info, scratch=.true.,mold=x%v)
do i =1,nl+1
call psb_geasb(c(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(z(i), desc_a,info, scratch=.true.,mold=x%v)
call psb_geasb(c_scale(i), desc_a,info, scratch=.true.,mold=x%v)
end do
itx = 0
nrst = -1
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
restart: do
if (itx>= itmax_) exit restart
h = zzero
it = 0
! compute r0 = b-ax0
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_geaxpby(zone, b, zzero, r, desc_a, info)
call psb_spmm(-zone,a,x,zone,r,desc_a,info,work=aux)
if (info /= psb_success_) then
@ -278,65 +268,65 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
call psb_errpush(info,name)
goto 9999
end if
call psb_init_conv(methdname,istop_,itrace_,itmax_,a,b,eps,desc_a,stopdat,info)
! if (info /= psb_success_) Then
! call psb_errpush(psb_err_from_subroutine_non_,name)
! goto 9999
! End If
nrst = nrst + 1
nrst = nrst + 1
iteration: do
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(zone,a,z(j),zzero,c(1),desc_a,info,work=aux)
do i =1, j - 1
itx = itx + 1
it = it + 1
j = it
!Apply preconditioner
call prec%apply(r,z(j),desc_a,info,work=aux)
call psb_spmm(zone,a,z(j),zzero,c(1),desc_a,info,work=aux)
do i =1, j - 1
h(i,j) = psb_gedot(c_scale(i), c(i), desc_a, info)
call psb_geaxpby(zone, c(i), zzero, c(i+1), desc_a, info)
call psb_geaxpby(-h(i,j), c_scale(i), zone, c(i+1), desc_a, info)
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = zone/h(j,j)
call psb_geaxpby(hjj, c(j), zzero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(zone, r, zzero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), zone, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call ztrsm('l','u','n','n',m,1,zone,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(zzero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), zone, x, desc_a, info)
enddo
end do
h(j,j) = psb_norm2(c(j), desc_a, info)
hjj = zone/h(j,j)
call psb_geaxpby(hjj, c(j), zzero, c_scale(j), desc_a, info)
alpha(j) = psb_gedot(c_scale(j), r, desc_a, info)
!Update residual
call psb_geaxpby(zone, r, zzero, r, desc_a, info)
call psb_geaxpby(-alpha(j), c_scale(j), zone, r, desc_a, info)
if (psb_check_conv(methdname,itx,x,r,desc_a,stopdat,info)) exit restart
if (j >= irst) exit iteration
end do iteration
m = j
!Compute solution
call ztrsm('l','u','n','n',m,1,zone,h,size(h,1),alpha,size(alpha,1))
if (nrst == 0 ) then
call x%set(zzero)
endif
do i=1,m
call psb_geaxpby(alpha(i), z(i), zone, x, desc_a, info)
enddo
end do restart
m = j
!Compute solution
@ -347,38 +337,38 @@ subroutine psb_zcgr_vect(a,prec,b,x,eps,desc_a,info,&
enddo
iter = j
call psb_end_conv(methdname,itx,desc_a,stopdat,info,derr,iter)
if (present(err)) err = derr
if (info == psb_success_) call psb_gefree(r,desc_a,info)
do j = 1,m
if (info == psb_success_) call psb_gefree(z(j),desc_a,info)
if (info == psb_success_) call psb_gefree(c_scale(j),desc_a,info)
enddo
do i =1,nl+1
if (info == psb_success_) call psb_gefree(c(i),desc_a,info)
end do
if (info == psb_success_) deallocate(aux,h,c_scale,z,c,alpha,stat=info)
if (info /= psb_success_) then
info=psb_err_from_subroutine_non_
call psb_errpush(info,name)
goto 9999
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.psb_act_abort_) then
call psb_error()
return
end if
return
end subroutine psb_zcgr_vect

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