diff options
Diffstat (limited to 'BLAS/SRC/scopy.f')
| -rw-r--r-- | BLAS/SRC/scopy.f | 64 |
1 files changed, 33 insertions, 31 deletions
diff --git a/BLAS/SRC/scopy.f b/BLAS/SRC/scopy.f index e0f41fe8..905a64cb 100644 --- a/BLAS/SRC/scopy.f +++ b/BLAS/SRC/scopy.f @@ -27,42 +27,44 @@ INTRINSIC MOD * .. IF (N.LE.0) RETURN - IF (INCX.EQ.1 .AND. INCY.EQ.1) GO TO 20 -* -* code for unequal increments or equal increments -* not equal to 1 -* - IX = 1 - IY = 1 - IF (INCX.LT.0) IX = (-N+1)*INCX + 1 - IF (INCY.LT.0) IY = (-N+1)*INCY + 1 - DO 10 I = 1,N - SY(IY) = SX(IX) - IX = IX + INCX - IY = IY + INCY - 10 CONTINUE - RETURN + IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN * * code for both increments equal to 1 * * * clean-up loop * - 20 M = MOD(N,7) - IF (M.EQ.0) GO TO 40 - DO 30 I = 1,M - SY(I) = SX(I) - 30 CONTINUE - IF (N.LT.7) RETURN - 40 MP1 = M + 1 - DO 50 I = MP1,N,7 - SY(I) = SX(I) - SY(I+1) = SX(I+1) - SY(I+2) = SX(I+2) - SY(I+3) = SX(I+3) - SY(I+4) = SX(I+4) - SY(I+5) = SX(I+5) - SY(I+6) = SX(I+6) - 50 CONTINUE + M = MOD(N,7) + IF (M.NE.0) THEN + DO I = 1,M + SY(I) = SX(I) + END DO + IF (N.LT.7) RETURN + END IF + MP1 = M + 1 + DO I = MP1,N,7 + SY(I) = SX(I) + SY(I+1) = SX(I+1) + SY(I+2) = SX(I+2) + SY(I+3) = SX(I+3) + SY(I+4) = SX(I+4) + SY(I+5) = SX(I+5) + SY(I+6) = SX(I+6) + END DO + ELSE +* +* code for unequal increments or equal increments +* not equal to 1 +* + IX = 1 + IY = 1 + IF (INCX.LT.0) IX = (-N+1)*INCX + 1 + IF (INCY.LT.0) IY = (-N+1)*INCY + 1 + DO I = 1,N + SY(IY) = SX(IX) + IX = IX + INCX + IY = IY + INCY + END DO + END IF RETURN END |