1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
! { dg-do run }
! { dg-additional-options "-msse2" { target sse2_runtime } }
! { dg-additional-options "-mavx" { target avx_runtime } }
module SIMD4_mod
contains
subroutine work( b, n, m )
implicit none
real :: b(n)
integer :: i,n,m
call init(b, n)
!$omp simd safelen(16)
do i = m+1, n
b(i) = b(i-m) - 1.0
end do
end subroutine work
subroutine work_ref( b, n, m )
implicit none
real :: b(n)
integer :: i,n,m
call init(b, n)
do i = m+1, n
b(i) = b(i-m) - 1.0
end do
end subroutine work_ref
subroutine init (b, n)
real :: b(*)
integer :: n, i, s
s = -1
do i = 1, n
b(i) = i * i * s
s = -s
end do
end subroutine
subroutine check (a, b, n)
integer :: i, n
real, parameter :: EPS = 0.000001
real :: diff, a(*), b(*)
do i = 1, n
diff = a(i) - b(i)
if (diff > EPS .or. -diff > EPS) stop 1
end do
end subroutine
end module
program SIMD4
use SIMD4_mod
real :: b(128), b_ref(128)
call work(b, 128, 32)
call work_ref(b_ref, 128, 32)
call check(b, b_ref, 128)
end program
|
