| !Program to test SET_EXPONENT intrinsic function. |
| |
| program test_set_exponent |
| call test_real4() |
| call test_real8() |
| end |
| subroutine test_real4() |
| real x,y |
| integer i,n |
| equivalence(x,i) |
| |
| n = -148 |
| x = 1024.0 |
| y = set_exponent (x, n) |
| if ((y .ne. 0.0) .and. (exponent (y) .ne. n)) call abort() |
| |
| n = 8 |
| x = 1024.0 |
| y = set_exponent (x, n) |
| if (exponent (y) .ne. n) call abort() |
| |
| n = 128 |
| i = o'00037777777' |
| y = set_exponent (x, n) |
| if (exponent (y) .ne. n) call abort() |
| |
| n = -148 |
| x = -1024.0 |
| y = set_exponent (x, n) |
| if ((y .ne. 0.0) .and. (exponent (y) .ne. n)) call abort() |
| |
| n = 8 |
| x = -1024.0 |
| y = set_exponent (x, n) |
| if (y .ne. -128.0) call abort() |
| if (exponent (y) .ne. n) call abort() |
| |
| n = 128 |
| i = o'20037777777' |
| y = set_exponent (x, n) |
| if (exponent (y) .ne. n) call abort() |
| |
| end |
| |
| subroutine test_real8() |
| implicit none |
| real*8 x, y |
| integer*8 i, n, low |
| equivalence(x, i) |
| |
| n = -1073 |
| x = 1024.0_8 |
| y = set_exponent (x, n) |
| if ((y .ne. 0.0_8) .and. (exponent (y) .ne. n)) call abort() |
| |
| n = 8 |
| x = 1024.0_8 |
| y = set_exponent (x, n) |
| if (y .ne. 128.0) call abort() |
| if (exponent (y) .ne. n) call abort() |
| |
| n = 1024 |
| low = z'ffffffff' |
| i = z'000fffff' |
| i = ishft (i, 32) + low !'000fffffffffffff' |
| y = set_exponent (x, n) |
| low = z'fffffffe' |
| i = z'7fefffff' |
| i = ishft (i, 32) + low |
| if (exponent (y) .ne. n) call abort() |
| |
| n = -1073 |
| x = -1024.0 |
| y = set_exponent (x, n) |
| low = z'00000001' |
| if ((y .ne. 0.0) .and. (exponent (y) .ne. n)) call abort() |
| |
| n = 8 |
| x = -1024.0 |
| y = set_exponent (x, n) |
| if (y .ne. -128.0) call abort() |
| if (exponent (y) .ne. n) call abort() |
| |
| n = 1024 |
| low = z'ffffffff' |
| i = z'800fffff' |
| i = ishft (i, 32) + low !z'800fffffffffffff' |
| y = set_exponent (x, n) |
| if (exponent (y) .ne. n) call abort() |
| |
| end |
