dblat1.f

来自「famous linear algebra library (LAPACK) p」· F 代码 · 共 770 行 · 第 1/3 页

         INCX = INCXS(KI)
         INCY = INCYS(KI)
         MX = ABS(INCX)
         MY = ABS(INCY)
*
         DO 40 KN = 1, 4
            N = NS(KN)
            KSIZE = MIN(2,KN)
            LENX = LENS(KN,MX)
            LENY = LENS(KN,MY)
*
            IF (ICASE.EQ.4) THEN
*              .. DROT ..
               DO 20 I = 1, 7
                  SX(I) = DX1(I)
                  SY(I) = DY1(I)
                  STX(I) = DT9X(I,KN,KI)
                  STY(I) = DT9Y(I,KN,KI)
   20          CONTINUE
               CALL DROT(N,SX,INCX,SY,INCY,SC,SS)
               CALL STEST(LENX,SX,STX,SSIZE2(1,KSIZE),SFAC)
               CALL STEST(LENY,SY,STY,SSIZE2(1,KSIZE),SFAC)
            ELSE
               WRITE (NOUT,*) ' Shouldn''t be here in CHECK3'
               STOP
            END IF
   40    CONTINUE
   60 CONTINUE
*
      MWPC(1) = 1
      DO 80 I = 2, 11
         MWPC(I) = 0
   80 CONTINUE
      MWPS(1) = 0
      DO 100 I = 2, 6
         MWPS(I) = 1
  100 CONTINUE
      DO 120 I = 7, 11
         MWPS(I) = -1
  120 CONTINUE
      MWPINX(1) = 1
      MWPINX(2) = 1
      MWPINX(3) = 1
      MWPINX(4) = -1
      MWPINX(5) = 1
      MWPINX(6) = -1
      MWPINX(7) = 1
      MWPINX(8) = 1
      MWPINX(9) = -1
      MWPINX(10) = 1
      MWPINX(11) = -1
      MWPINY(1) = 1
      MWPINY(2) = 1
      MWPINY(3) = -1
      MWPINY(4) = -1
      MWPINY(5) = 2
      MWPINY(6) = 1
      MWPINY(7) = 1
      MWPINY(8) = -1
      MWPINY(9) = -1
      MWPINY(10) = 2
      MWPINY(11) = 1
      DO 140 I = 1, 11
         MWPN(I) = 5
  140 CONTINUE
      MWPN(5) = 3
      MWPN(10) = 3
      DO 160 I = 1, 5
         MWPX(I) = I
         MWPY(I) = I
         MWPTX(1,I) = I
         MWPTY(1,I) = I
         MWPTX(2,I) = I
         MWPTY(2,I) = -I
         MWPTX(3,I) = 6 - I
         MWPTY(3,I) = I - 6
         MWPTX(4,I) = I
         MWPTY(4,I) = -I
         MWPTX(6,I) = 6 - I
         MWPTY(6,I) = I - 6
         MWPTX(7,I) = -I
         MWPTY(7,I) = I
         MWPTX(8,I) = I - 6
         MWPTY(8,I) = 6 - I
         MWPTX(9,I) = -I
         MWPTY(9,I) = I
         MWPTX(11,I) = I - 6
         MWPTY(11,I) = 6 - I
  160 CONTINUE
      MWPTX(5,1) = 1
      MWPTX(5,2) = 3
      MWPTX(5,3) = 5
      MWPTX(5,4) = 4
      MWPTX(5,5) = 5
      MWPTY(5,1) = -1
      MWPTY(5,2) = 2
      MWPTY(5,3) = -2
      MWPTY(5,4) = 4
      MWPTY(5,5) = -3
      MWPTX(10,1) = -1
      MWPTX(10,2) = -3
      MWPTX(10,3) = -5
      MWPTX(10,4) = 4
      MWPTX(10,5) = 5
      MWPTY(10,1) = 1
      MWPTY(10,2) = 2
      MWPTY(10,3) = 2
      MWPTY(10,4) = 4
      MWPTY(10,5) = 3
      DO 200 I = 1, 11
         INCX = MWPINX(I)
         INCY = MWPINY(I)
         DO 180 K = 1, 5
            COPYX(K) = MWPX(K)
            COPYY(K) = MWPY(K)
            MWPSTX(K) = MWPTX(I,K)
            MWPSTY(K) = MWPTY(I,K)
  180    CONTINUE
         CALL DROT(MWPN(I),COPYX,INCX,COPYY,INCY,MWPC(I),MWPS(I))
         CALL STEST(5,COPYX,MWPSTX,MWPSTX,SFAC)
         CALL STEST(5,COPYY,MWPSTY,MWPSTY,SFAC)
  200 CONTINUE
      RETURN
      END
      SUBROUTINE STEST(LEN,SCOMP,STRUE,SSIZE,SFAC)
*     ********************************* STEST **************************
*
*     THIS SUBR COMPARES ARRAYS  SCOMP() AND STRUE() OF LENGTH LEN TO
*     SEE IF THE TERM BY TERM DIFFERENCES, MULTIPLIED BY SFAC, ARE
*     NEGLIGIBLE.
*
*     C. L. LAWSON, JPL, 1974 DEC 10
*
*     .. Parameters ..
      INTEGER          NOUT
      PARAMETER        (NOUT=6)
*     .. Scalar Arguments ..
      DOUBLE PRECISION SFAC
      INTEGER          LEN
*     .. Array Arguments ..
      DOUBLE PRECISION SCOMP(LEN), SSIZE(LEN), STRUE(LEN)
*     .. Scalars in Common ..
      INTEGER          ICASE, INCX, INCY, MODE, N
      LOGICAL          PASS
*     .. Local Scalars ..
      DOUBLE PRECISION SD
      INTEGER          I
*     .. External Functions ..
      DOUBLE PRECISION SDIFF
      EXTERNAL         SDIFF
*     .. Intrinsic Functions ..
      INTRINSIC        ABS
*     .. Common blocks ..
      COMMON           /COMBLA/ICASE, N, INCX, INCY, MODE, PASS
*     .. Executable Statements ..
*
      DO 40 I = 1, LEN
         SD = SCOMP(I) - STRUE(I)
         IF (SDIFF(ABS(SSIZE(I))+ABS(SFAC*SD),ABS(SSIZE(I))).EQ.0.0D0)
     +       GO TO 40
*
*                             HERE    SCOMP(I) IS NOT CLOSE TO STRUE(I).
*
         IF ( .NOT. PASS) GO TO 20
*                             PRINT FAIL MESSAGE AND HEADER.
         PASS = .FALSE.
         WRITE (NOUT,99999)
         WRITE (NOUT,99998)
   20    WRITE (NOUT,99997) ICASE, N, INCX, INCY, MODE, I, SCOMP(I),
     +     STRUE(I), SD, SSIZE(I)
   40 CONTINUE
      RETURN
*
99999 FORMAT ('                                       FAIL')
99998 FORMAT (/' CASE  N INCX INCY MODE  I                            ',
     +       ' COMP(I)                             TRUE(I)  DIFFERENCE',
     +       '     SIZE(I)',/1X)
99997 FORMAT (1X,I4,I3,3I5,I3,2D36.8,2D12.4)
      END
      SUBROUTINE STEST1(SCOMP1,STRUE1,SSIZE,SFAC)
*     ************************* STEST1 *****************************
*
*     THIS IS AN INTERFACE SUBROUTINE TO ACCOMODATE THE FORTRAN
*     REQUIREMENT THAT WHEN A DUMMY ARGUMENT IS AN ARRAY, THE
*     ACTUAL ARGUMENT MUST ALSO BE AN ARRAY OR AN ARRAY ELEMENT.
*
*     C.L. LAWSON, JPL, 1978 DEC 6
*
*     .. Scalar Arguments ..
      DOUBLE PRECISION  SCOMP1, SFAC, STRUE1
*     .. Array Arguments ..
      DOUBLE PRECISION  SSIZE(*)
*     .. Local Arrays ..
      DOUBLE PRECISION  SCOMP(1), STRUE(1)
*     .. External Subroutines ..
      EXTERNAL          STEST
*     .. Executable Statements ..
*
      SCOMP(1) = SCOMP1
      STRUE(1) = STRUE1
      CALL STEST(1,SCOMP,STRUE,SSIZE,SFAC)
*
      RETURN
      END
      DOUBLE PRECISION FUNCTION SDIFF(SA,SB)
*     ********************************* SDIFF **************************
*     COMPUTES DIFFERENCE OF TWO NUMBERS.  C. L. LAWSON, JPL 1974 FEB 15
*
*     .. Scalar Arguments ..
      DOUBLE PRECISION                SA, SB
*     .. Executable Statements ..
      SDIFF = SA - SB
      RETURN
      END
      SUBROUTINE ITEST1(ICOMP,ITRUE)
*     ********************************* ITEST1 *************************
*
*     THIS SUBROUTINE COMPARES THE VARIABLES ICOMP AND ITRUE FOR
*     EQUALITY.
*     C. L. LAWSON, JPL, 1974 DEC 10
*
*     .. Parameters ..
      INTEGER           NOUT
      PARAMETER         (NOUT=6)
*     .. Scalar Arguments ..
      INTEGER           ICOMP, ITRUE
*     .. Scalars in Common ..
      INTEGER           ICASE, INCX, INCY, MODE, N
      LOGICAL           PASS
*     .. Local Scalars ..
      INTEGER           ID
*     .. Common blocks ..
      COMMON            /COMBLA/ICASE, N, INCX, INCY, MODE, PASS
*     .. Executable Statements ..
*
      IF (ICOMP.EQ.ITRUE) GO TO 40
*
*                            HERE ICOMP IS NOT EQUAL TO ITRUE.
*
      IF ( .NOT. PASS) GO TO 20
*                             PRINT FAIL MESSAGE AND HEADER.
      PASS = .FALSE.
      WRITE (NOUT,99999)
      WRITE (NOUT,99998)
   20 ID = ICOMP - ITRUE
      WRITE (NOUT,99997) ICASE, N, INCX, INCY, MODE, ICOMP, ITRUE, ID
   40 CONTINUE
      RETURN
*
99999 FORMAT ('                                       FAIL')
99998 FORMAT (/' CASE  N INCX INCY MODE                               ',
     +       ' COMP                                TRUE     DIFFERENCE',
     +       /1X)
99997 FORMAT (1X,I4,I3,3I5,2I36,I12)
      END