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!Program to test SET_EXPONENT intrinsic function.
program test_set_exponent
call test_real4()
call test_real8()
end
subroutine test_real4()
real*4 x,y
integer*4 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)) STOP 1
n = 8
x = 1024.0
y = set_exponent (x, n)
if (exponent (y) .ne. n) STOP 2
n = 128
i = 8388607
x = transfer (i, x) ! z'007fffff' Positive denormalized floating-point.
y = set_exponent (x, n)
if (exponent (y) .ne. n) STOP 3
n = -148
x = -1024.0
y = set_exponent (x, n)
if ((y .ne. 0.0) .and. (exponent (y) .ne. n)) STOP 4
n = 8
x = -1024.0
y = set_exponent (x, n)
if (y .ne. -128.0) STOP 5
if (exponent (y) .ne. n) STOP 6
n = 128
i = -2139095041
x = transfer (i, x) ! z'807fffff' Negative denormalized floating-point.
y = set_exponent (x, n)
if (exponent (y) .ne. n) STOP 7
end
subroutine test_real8()
implicit none
real*8 x, y
integer*8 i, n
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)) STOP 8
n = 8
x = 1024.0_8
y = set_exponent (x, n)
if (y .ne. 128.0) STOP 9
if (exponent (y) .ne. n) STOP 10
n = 1024
i = 4503599627370495_8
x = transfer (i, x) !z'000fffffffffffff' Positive denormalized floating-point.
y = set_exponent (x, n)
if (exponent (y) .ne. n) STOP 11
n = -1073
x = -1024.0
y = set_exponent (x, n)
if ((y .ne. 0.0) .and. (exponent (y) .ne. n)) STOP 12
n = 8
x = -1024.0
y = set_exponent (x, n)
if (y .ne. -128.0) STOP 13
if (exponent (y) .ne. n) STOP 14
n = 1024
i = -9218868437227405313_8
x = transfer (i, x)!z'800fffffffffffff' Negative denormalized floating-point.
y = set_exponent (x, n)
if (exponent (y) .ne. n) STOP 15
end
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