|
|
|
|
C
|
|
|
|
|
C Parallel Sparse BLAS version 2.2
|
|
|
|
|
C (C) Copyright 2006/2007/2008
|
|
|
|
|
C Salvatore Filippone University of Rome Tor Vergata
|
|
|
|
|
C Alfredo Buttari University of Rome Tor Vergata
|
|
|
|
|
C
|
|
|
|
|
C Redistribution and use in source and binary forms, with or without
|
|
|
|
|
C modification, are permitted provided that the following conditions
|
|
|
|
|
C are met:
|
|
|
|
|
C 1. Redistributions of source code must retain the above copyright
|
|
|
|
|
C notice, this list of conditions and the following disclaimer.
|
|
|
|
|
C 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
|
C notice, this list of conditions, and the following disclaimer in the
|
|
|
|
|
C documentation and/or other materials provided with the distribution.
|
|
|
|
|
C 3. The name of the PSBLAS group or the names of its contributors may
|
|
|
|
|
C not be used to endorse or promote products derived from this
|
|
|
|
|
C software without specific written permission.
|
|
|
|
|
C
|
|
|
|
|
C THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
|
|
|
C ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
|
|
|
C TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
|
|
|
C PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
|
|
|
|
C BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
|
|
|
C CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
|
|
|
C SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
|
|
|
C INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
|
|
|
C CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
|
|
|
C ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
|
|
|
C POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
|
C
|
|
|
|
|
C
|
|
|
|
|
C
|
|
|
|
|
C Compute level numbers for the triangular matrix.
|
|
|
|
|
C
|
|
|
|
|
SUBROUTINE DVTFG (UPLO,M,JA,IA,NG,IPA,IPAT,KLEN,IWORK1,IWORK2,
|
|
|
|
|
* IWORK3)
|
|
|
|
|
use psb_const_mod
|
|
|
|
|
use psb_string_mod
|
|
|
|
|
use psb_error_mod
|
|
|
|
|
implicit none
|
|
|
|
|
C .. Scalar Arguments ..
|
|
|
|
|
INTEGER M, NG
|
|
|
|
|
CHARACTER UPLO
|
|
|
|
|
C .. Array Arguments ..
|
|
|
|
|
INTEGER IA(*), IPA(*), IPAT(*), IWORK3(*), JA(*),
|
|
|
|
|
* KLEN(*), IWORK2(*), IWORK1(*)
|
|
|
|
|
C .. Local Scalars ..
|
|
|
|
|
INTEGER I, J, L, L0, L1, LEV, NP, iret
|
|
|
|
|
C .. Intrinsic Functions ..
|
|
|
|
|
INTRINSIC MAX
|
|
|
|
|
integer :: debug_level, debug_unit
|
|
|
|
|
character(len=20) :: name='DVTFG'
|
|
|
|
|
C .. Executable Statements ..
|
|
|
|
|
C
|
|
|
|
|
debug_unit = psb_get_debug_unit()
|
|
|
|
|
debug_level = psb_get_debug_level()
|
|
|
|
|
NG = 0
|
|
|
|
|
C
|
|
|
|
|
C CHECK ON THE NUMBERS OF THE ELEMENTS OF THE MATRIX
|
|
|
|
|
C
|
|
|
|
|
IF ((IA(M+1)-1).EQ.0) THEN
|
|
|
|
|
C
|
|
|
|
|
C THE MATRIX HASN'T ELEMENTS
|
|
|
|
|
C THE OUTPUT PERMUTATIONS ARE POSED TO THE IDENTITY MATRIX
|
|
|
|
|
C
|
|
|
|
|
DO 20 I = 1, M
|
|
|
|
|
IPA(I) = I
|
|
|
|
|
IPAT(I) = I
|
|
|
|
|
KLEN(I) = 0
|
|
|
|
|
20 CONTINUE
|
|
|
|
|
ELSE
|
|
|
|
|
C
|
|
|
|
|
C COMPUTE LEVEL NUMBER FOR EACH ROWS
|
|
|
|
|
C
|
|
|
|
|
C IWORK1: AUXILIARY VECTOR WHICH CONTAINS
|
|
|
|
|
C LEVEL NUMBERS OF EACH ROW
|
|
|
|
|
C
|
|
|
|
|
DO 40 I = 1, M
|
|
|
|
|
IWORK1(I) = 0
|
|
|
|
|
IWORK3(I) = 0
|
|
|
|
|
40 CONTINUE
|
|
|
|
|
IF (toupper(UPLO).EQ.'L') THEN
|
|
|
|
|
C
|
|
|
|
|
C LOWER TRIANGULAR SPARSE MATRIX
|
|
|
|
|
C
|
|
|
|
|
DO 80 I = 1, M
|
|
|
|
|
IWORK1(I) = 1
|
|
|
|
|
DO 60 J = IA(I), IA(I+1) - 1
|
|
|
|
|
IWORK1(I) = MAX(IWORK1(I),IWORK1(JA(J))+1)
|
|
|
|
|
60 CONTINUE
|
|
|
|
|
80 CONTINUE
|
|
|
|
|
ELSE IF (toupper(UPLO).EQ.'U') THEN
|
|
|
|
|
C
|
|
|
|
|
C UPPER TRIANGULAR SPARSE MATRIX
|
|
|
|
|
C
|
|
|
|
|
DO 120 I = M, 1, -1
|
|
|
|
|
IWORK1(I) = 1
|
|
|
|
|
DO 100 J = IA(I), IA(I+1) - 1
|
|
|
|
|
IWORK1(I) = MAX(IWORK1(I),IWORK1(JA(J))+1)
|
|
|
|
|
100 CONTINUE
|
|
|
|
|
120 CONTINUE
|
|
|
|
|
END IF
|
|
|
|
|
C
|
|
|
|
|
C COUNT NUMBER OF ROWS IN EACH EQUIVALENCE GROUPS
|
|
|
|
|
C
|
|
|
|
|
C NOTE: GROUP = SET OF ROWS HAVING THE SAME LEVEL NUMBER
|
|
|
|
|
C
|
|
|
|
|
C IWORK3: AUXILIARY VECTOR WHICH CONTAINS
|
|
|
|
|
C THE NUMBER OF ROWS FOR EACH GROUPS
|
|
|
|
|
C
|
|
|
|
|
DO 140 I = 1, M
|
|
|
|
|
IWORK3(IWORK1(I)) = IWORK3(IWORK1(I)) + 1
|
|
|
|
|
140 CONTINUE
|
|
|
|
|
C
|
|
|
|
|
C SET UP IWORK2:
|
|
|
|
|
C IWORK2(I) POINTS TO THE BEGINNING OF I-TH GROUP
|
|
|
|
|
C
|
|
|
|
|
IWORK2(1) = 1
|
|
|
|
|
DO 160 I = 2, M + 1
|
|
|
|
|
IWORK2(I) = IWORK3(I-1) + IWORK2(I-1)
|
|
|
|
|
IF (IWORK2(I).EQ.M+1) THEN
|
|
|
|
|
NG = I - 1
|
|
|
|
|
GO TO 180
|
|
|
|
|
END IF
|
|
|
|
|
160 CONTINUE
|
|
|
|
|
180 CONTINUE
|
|
|
|
|
C
|
|
|
|
|
C NG : TOTAL NUMBER OF LEVELS
|
|
|
|
|
C IWORK3: VECTOR CONTAINING THE NUMBER OF THE ROWS SORTED BY
|
|
|
|
|
C EQUIVALENCE GROUPS.
|
|
|
|
|
C
|
|
|
|
|
DO 200 I = 1, M
|
|
|
|
|
IWORK3(IWORK2(IWORK1(I))) = I
|
|
|
|
|
IWORK2(IWORK1(I)) = IWORK2(IWORK1(I)) + 1
|
|
|
|
|
200 CONTINUE
|
|
|
|
|
C
|
|
|
|
|
C REGENERATE IWORK2: POINTER INTO IWORK3 FOR EQUIVALENCE GROUPS
|
|
|
|
|
C
|
|
|
|
|
DO 220 I = NG + 1, 2, -1
|
|
|
|
|
IWORK2(I) = IWORK2(I-1)
|
|
|
|
|
220 CONTINUE
|
|
|
|
|
IWORK2(1) = 1
|
|
|
|
|
C
|
|
|
|
|
C IWORK1: ROWS LENGTH IN NEW ORDERING
|
|
|
|
|
C
|
|
|
|
|
DO 240 L = 1, M
|
|
|
|
|
IWORK1(L) = IA(IWORK3(L)) - IA(IWORK3(L)+1)
|
|
|
|
|
240 CONTINUE
|
|
|
|
|
C
|
|
|
|
|
C SORT ROWS BY DECREASING NUMBER OF NONZERO ELEMENTS.
|
|
|
|
|
C
|
|
|
|
|
C IPA: VECTOR OF NUMBER OF ROWS SORTED BY EQUIVALENCE
|
|
|
|
|
C GROUPS AND BY ROW LENGTH
|
|
|
|
|
C IPAT: AUXILIARY VECTOR NEED TO THE SORTER ROUTINES
|
|
|
|
|
C
|
|
|
|
|
L1 = IWORK2(2) - IWORK2(1)
|
|
|
|
|
DO 260 L = 1, L1
|
|
|
|
|
IPA(L) = IWORK3(L)
|
|
|
|
|
260 CONTINUE
|
|
|
|
|
if (debug_level >= psb_debug_serial_)
|
|
|
|
|
+ write(debug_unit,*) trim(name),
|
|
|
|
|
+ ': Group ',1,':',(ipa(l),l=1,l1)
|
|
|
|
|
DO 360 LEV = 2, NG
|
|
|
|
|
C
|
|
|
|
|
C LOOP ON GROUPS
|
|
|
|
|
C L1: LENGTH OF CURRENT GROUP
|
|
|
|
|
C L0: POINTER TO IPA TO THE FIRST LOCATIONS RESERVED
|
|
|
|
|
C FOR CURRENT GROUP
|
|
|
|
|
C
|
|
|
|
|
L1 = IWORK2(LEV+1) - IWORK2(LEV)
|
|
|
|
|
L0 = IWORK2(LEV) - 1
|
|
|
|
|
CALL MSORT_UP(L1,IWORK1(IWORK2(LEV)),IPAT,IRET)
|
|
|
|
|
IF (IRET.EQ.0) THEN
|
|
|
|
|
NP = IPAT(1)
|
|
|
|
|
DO 280 L = 1, L1
|
|
|
|
|
IPA(L0+L) = IWORK3(L0+NP)
|
|
|
|
|
NP = IPAT(1+NP)
|
|
|
|
|
280 CONTINUE
|
|
|
|
|
ELSE
|
|
|
|
|
C
|
|
|
|
|
C VECTOR ALREADY SORTED. NO CHANGE IS NEED
|
|
|
|
|
C
|
|
|
|
|
DO 320 L = 1, L1
|
|
|
|
|
IPA(L0+L) = IWORK3(L0+L)
|
|
|
|
|
320 CONTINUE
|
|
|
|
|
ENDIF
|
|
|
|
|
if (debug_level >= psb_debug_serial_)
|
|
|
|
|
+ write(debug_unit,*) trim(name),
|
|
|
|
|
+ ': Group ',lev,':',(ipa(l0+l),l=1,l1)
|
|
|
|
|
360 CONTINUE
|
|
|
|
|
C
|
|
|
|
|
C IPAT = IPA-1
|
|
|
|
|
C
|
|
|
|
|
DO 380 I = 1, M
|
|
|
|
|
IPAT(IPA(I)) = I
|
|
|
|
|
380 CONTINUE
|
|
|
|
|
C DO 400 I = 1, NG
|
|
|
|
|
C KLEN(I) = IWORK2(I+1) - IWORK2(I)
|
|
|
|
|
DO 400 I = 1, NG+1
|
|
|
|
|
KLEN(I) = IWORK2(I)
|
|
|
|
|
400 CONTINUE
|
|
|
|
|
END IF
|
|
|
|
|
RETURN
|
|
|
|
|
END
|
