root / synthbench / euroben-dm / mod2b / scal.f @ 0:839f52ef7657
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| 1 | 0:839f52ef7657 | louridas | Subroutine scal( n, a, x, incx ) |
|---|---|---|---|
| 2 | 0:839f52ef7657 | louridas | Use numerics |
| 3 | 0:839f52ef7657 | louridas | Implicit None |
| 4 | 0:839f52ef7657 | louridas | |
| 5 | 0:839f52ef7657 | louridas | Real(l_) :: a, x(*) |
| 6 | 0:839f52ef7657 | louridas | Integer :: i, incx, m, mp1, n, nincx |
| 7 | 0:839f52ef7657 | louridas | ! ---------------------------------------------------------------------- |
| 8 | 0:839f52ef7657 | louridas | If ( n <= 0 ) Return |
| 9 | 0:839f52ef7657 | louridas | If ( incx /= 1 ) Then |
| 10 | 0:839f52ef7657 | louridas | nincx = n*incx |
| 11 | 0:839f52ef7657 | louridas | Do i = 1, nincx, incx |
| 12 | 0:839f52ef7657 | louridas | x(i) = a*x(i) |
| 13 | 0:839f52ef7657 | louridas | End Do |
| 14 | 0:839f52ef7657 | louridas | Return |
| 15 | 0:839f52ef7657 | louridas | End If |
| 16 | 0:839f52ef7657 | louridas | m = Mod( n, 5 ) |
| 17 | 0:839f52ef7657 | louridas | If ( m /= 0 ) Then |
| 18 | 0:839f52ef7657 | louridas | Do i = 1, m |
| 19 | 0:839f52ef7657 | louridas | x(i) = a*x(i) |
| 20 | 0:839f52ef7657 | louridas | End Do |
| 21 | 0:839f52ef7657 | louridas | If ( n < 5 ) Return |
| 22 | 0:839f52ef7657 | louridas | End If |
| 23 | 0:839f52ef7657 | louridas | mp1 = m + 1 |
| 24 | 0:839f52ef7657 | louridas | Do i = mp1, n, 5 |
| 25 | 0:839f52ef7657 | louridas | x(i) = a*x(i) |
| 26 | 0:839f52ef7657 | louridas | x(i+1) = a*x(i+1) |
| 27 | 0:839f52ef7657 | louridas | x(i+2) = a*x(i+2) |
| 28 | 0:839f52ef7657 | louridas | x(i+3) = a*x(i+3) |
| 29 | 0:839f52ef7657 | louridas | x(i+4) = a*x(i+4) |
| 30 | 0:839f52ef7657 | louridas | End Do |
| 31 | 0:839f52ef7657 | louridas | ! ---------------------------------------------------------------------- |
| 32 | 0:839f52ef7657 | louridas | End Subroutine scal |