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! Test IEEE_SIGNBIT
! { dg-do run }
use, intrinsic :: ieee_features
use, intrinsic :: ieee_exceptions
use, intrinsic :: ieee_arithmetic
implicit none
real :: sx1
double precision :: dx1
! k1 and k2 will be large real kinds, if supported, and single/double
! otherwise
integer, parameter :: k1 = &
max(ieee_selected_real_kind(precision(0.d0) + 1), kind(0.))
integer, parameter :: k2 = &
max(ieee_selected_real_kind(precision(0._k1) + 1), kind(0.d0))
real(kind=k1) :: xk1
real(kind=k2) :: xk2
! Float
sx1 = 1.3
if (ieee_signbit(sx1)) stop 1
sx1 = huge(sx1)
if (ieee_signbit(sx1)) stop 2
sx1 = ieee_value(sx1, ieee_positive_inf)
if (ieee_signbit(sx1)) stop 3
sx1 = tiny(sx1)
if (ieee_signbit(sx1)) stop 4
sx1 = tiny(sx1)
sx1 = sx1 / 101
if (ieee_signbit(sx1)) stop 5
sx1 = 0
if (ieee_signbit(sx1)) stop 6
sx1 = ieee_value(sx1, ieee_quiet_nan)
if (ieee_signbit(sx1)) stop 7
sx1 = -1.3
if (.not. ieee_signbit(sx1)) stop 8
sx1 = -huge(sx1)
if (.not. ieee_signbit(sx1)) stop 9
sx1 = -ieee_value(sx1, ieee_positive_inf)
if (.not. ieee_signbit(sx1)) stop 10
sx1 = -tiny(sx1)
if (.not. ieee_signbit(sx1)) stop 11
sx1 = -tiny(sx1)
sx1 = sx1 / 101
if (.not. ieee_signbit(sx1)) stop 12
sx1 = 0
sx1 = -sx1
if (.not. ieee_signbit(sx1)) stop 13
sx1 = ieee_value(sx1, ieee_quiet_nan)
sx1 = -sx1
if (.not. ieee_signbit(sx1)) stop 14
! Double
dx1 = 1.3
if (ieee_signbit(dx1)) stop 1
dx1 = huge(dx1)
if (ieee_signbit(dx1)) stop 2
dx1 = ieee_value(dx1, ieee_positive_inf)
if (ieee_signbit(dx1)) stop 3
dx1 = tiny(dx1)
if (ieee_signbit(dx1)) stop 4
dx1 = tiny(dx1)
dx1 = dx1 / 101
if (ieee_signbit(dx1)) stop 5
dx1 = 0
if (ieee_signbit(dx1)) stop 6
dx1 = ieee_value(dx1, ieee_quiet_nan)
if (ieee_signbit(dx1)) stop 7
dx1 = -1.3
if (.not. ieee_signbit(dx1)) stop 8
dx1 = -huge(dx1)
if (.not. ieee_signbit(dx1)) stop 9
dx1 = -ieee_value(dx1, ieee_positive_inf)
if (.not. ieee_signbit(dx1)) stop 10
dx1 = -tiny(dx1)
if (.not. ieee_signbit(dx1)) stop 11
dx1 = -tiny(dx1)
dx1 = dx1 / 101
if (.not. ieee_signbit(dx1)) stop 12
dx1 = 0
dx1 = -dx1
if (.not. ieee_signbit(dx1)) stop 13
dx1 = ieee_value(dx1, ieee_quiet_nan)
dx1 = -dx1
if (.not. ieee_signbit(dx1)) stop 14
! Large kind 1
xk1 = 1.3
if (ieee_signbit(xk1)) stop 1
xk1 = huge(xk1)
if (ieee_signbit(xk1)) stop 2
xk1 = ieee_value(xk1, ieee_positive_inf)
if (ieee_signbit(xk1)) stop 3
xk1 = tiny(xk1)
if (ieee_signbit(xk1)) stop 4
xk1 = tiny(xk1)
xk1 = xk1 / 101
if (ieee_signbit(xk1)) stop 5
xk1 = 0
if (ieee_signbit(xk1)) stop 6
xk1 = ieee_value(xk1, ieee_quiet_nan)
if (ieee_signbit(xk1)) stop 7
xk1 = -1.3
if (.not. ieee_signbit(xk1)) stop 8
xk1 = -huge(xk1)
if (.not. ieee_signbit(xk1)) stop 9
xk1 = -ieee_value(xk1, ieee_positive_inf)
if (.not. ieee_signbit(xk1)) stop 10
xk1 = -tiny(xk1)
if (.not. ieee_signbit(xk1)) stop 11
xk1 = -tiny(xk1)
xk1 = xk1 / 101
if (.not. ieee_signbit(xk1)) stop 12
xk1 = 0
xk1 = -xk1
if (.not. ieee_signbit(xk1)) stop 13
xk1 = ieee_value(xk1, ieee_quiet_nan)
xk1 = -xk1
if (.not. ieee_signbit(xk1)) stop 14
! Large kind 2
xk2 = 1.3
if (ieee_signbit(xk2)) stop 1
xk2 = huge(xk2)
if (ieee_signbit(xk2)) stop 2
xk2 = ieee_value(xk2, ieee_positive_inf)
if (ieee_signbit(xk2)) stop 3
xk2 = tiny(xk2)
if (ieee_signbit(xk2)) stop 4
xk2 = tiny(xk2)
xk2 = xk2 / 101
if (ieee_signbit(xk2)) stop 5
xk2 = 0
if (ieee_signbit(xk2)) stop 6
xk2 = ieee_value(xk2, ieee_quiet_nan)
if (ieee_signbit(xk2)) stop 7
xk2 = -1.3
if (.not. ieee_signbit(xk2)) stop 8
xk2 = -huge(xk2)
if (.not. ieee_signbit(xk2)) stop 9
xk2 = -ieee_value(xk2, ieee_positive_inf)
if (.not. ieee_signbit(xk2)) stop 10
xk2 = -tiny(xk2)
if (.not. ieee_signbit(xk2)) stop 11
xk2 = -tiny(xk2)
xk2 = xk2 / 101
if (.not. ieee_signbit(xk2)) stop 12
xk2 = 0
xk2 = -xk2
if (.not. ieee_signbit(xk2)) stop 13
xk2 = ieee_value(xk2, ieee_quiet_nan)
xk2 = -xk2
if (.not. ieee_signbit(xk2)) stop 14
end
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