version 1.2, 2010/04/21 13:45:09
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version 1.7, 2011/07/22 07:38:01
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Line 30
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Line 30
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DASUM = 0.0d0 |
DASUM = 0.0d0 |
DTEMP = 0.0d0 |
DTEMP = 0.0d0 |
IF (N.LE.0 .OR. INCX.LE.0) RETURN |
IF (N.LE.0 .OR. INCX.LE.0) RETURN |
IF (INCX.EQ.1) GO TO 20 |
IF (INCX.EQ.1) THEN |
* |
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* code for increment not equal to 1 |
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* |
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NINCX = N*INCX |
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DO 10 I = 1,NINCX,INCX |
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DTEMP = DTEMP + DABS(DX(I)) |
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10 CONTINUE |
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DASUM = DTEMP |
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RETURN |
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* |
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* code for increment equal to 1 |
* code for increment equal to 1 |
* |
* |
* |
* |
* clean-up loop |
* clean-up loop |
* |
* |
20 M = MOD(N,6) |
M = MOD(N,6) |
IF (M.EQ.0) GO TO 40 |
IF (M.NE.0) THEN |
DO 30 I = 1,M |
DO I = 1,M |
DTEMP = DTEMP + DABS(DX(I)) |
DTEMP = DTEMP + DABS(DX(I)) |
30 CONTINUE |
END DO |
IF (N.LT.6) GO TO 60 |
IF (N.LT.6) THEN |
40 MP1 = M + 1 |
DASUM = DTEMP |
DO 50 I = MP1,N,6 |
RETURN |
DTEMP = DTEMP + DABS(DX(I)) + DABS(DX(I+1)) + DABS(DX(I+2)) + |
END IF |
+ DABS(DX(I+3)) + DABS(DX(I+4)) + DABS(DX(I+5)) |
END IF |
50 CONTINUE |
MP1 = M + 1 |
60 DASUM = DTEMP |
DO I = MP1,N,6 |
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DTEMP = DTEMP + DABS(DX(I)) + DABS(DX(I+1)) + |
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$ DABS(DX(I+2)) + DABS(DX(I+3)) + |
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$ DABS(DX(I+4)) + DABS(DX(I+5)) |
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END DO |
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ELSE |
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* |
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* code for increment not equal to 1 |
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* |
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NINCX = N*INCX |
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DO I = 1,NINCX,INCX |
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DTEMP = DTEMP + DABS(DX(I)) |
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END DO |
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END IF |
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DASUM = DTEMP |
RETURN |
RETURN |
END |
END |