diff options
Diffstat (limited to 'BLAS/SRC/dscal.f')
| -rw-r--r-- | BLAS/SRC/dscal.f | 48 |
1 files changed, 25 insertions, 23 deletions
diff --git a/BLAS/SRC/dscal.f b/BLAS/SRC/dscal.f index 81425a94..986c24eb 100644 --- a/BLAS/SRC/dscal.f +++ b/BLAS/SRC/dscal.f @@ -29,34 +29,36 @@ INTRINSIC MOD * .. IF (N.LE.0 .OR. INCX.LE.0) RETURN - IF (INCX.EQ.1) GO TO 20 -* -* code for increment not equal to 1 -* - NINCX = N*INCX - DO 10 I = 1,NINCX,INCX - DX(I) = DA*DX(I) - 10 CONTINUE - RETURN + IF (INCX.EQ.1) THEN * * code for increment equal to 1 * * * clean-up loop * - 20 M = MOD(N,5) - IF (M.EQ.0) GO TO 40 - DO 30 I = 1,M - DX(I) = DA*DX(I) - 30 CONTINUE - IF (N.LT.5) RETURN - 40 MP1 = M + 1 - DO 50 I = MP1,N,5 - DX(I) = DA*DX(I) - DX(I+1) = DA*DX(I+1) - DX(I+2) = DA*DX(I+2) - DX(I+3) = DA*DX(I+3) - DX(I+4) = DA*DX(I+4) - 50 CONTINUE + M = MOD(N,5) + IF (M.NE.0) THEN + DO I = 1,M + DX(I) = DA*DX(I) + END DO + IF (N.LT.5) RETURN + END IF + MP1 = M + 1 + DO I = MP1,N,5 + DX(I) = DA*DX(I) + DX(I+1) = DA*DX(I+1) + DX(I+2) = DA*DX(I+2) + DX(I+3) = DA*DX(I+3) + DX(I+4) = DA*DX(I+4) + END DO + ELSE +* +* code for increment not equal to 1 +* + NINCX = N*INCX + DO I = 1,NINCX,INCX + DX(I) = DA*DX(I) + END DO + END IF RETURN END |