laisnan Interface

public interface laisnan

This routine is not for general use. It exists solely to avoid over-optimization in DISNAN. LAISNAN checks for NaNs by comparing its two arguments for inequality. NaN is the only floating-point value where NaN != NaN returns .TRUE. To check for NaNs, pass the same variable as both arguments. A compiler must assume that the two arguments are not the same variable, and the test will not be optimized away. Interprocedural or whole-program optimization may delete this test. The ISNAN functions will be replaced by the correct Fortran 03 intrinsic once the intrinsic is widely available.


Functions

public pure function dlaisnan(din1, din2)

Arguments

Type IntentOptional Attributes Name
real(kind=dp), intent(in) :: din1
real(kind=dp), intent(in) :: din2

Return Value logical(kind=lk)

public pure function slaisnan(sin1, sin2)

Arguments

Type IntentOptional Attributes Name
real(kind=sp), intent(in) :: sin1
real(kind=sp), intent(in) :: sin2

Return Value logical(kind=lk)

Module Procedures

public interface stdlib_dlaisnan()

Arguments

None

public interface stdlib_slaisnan()

Arguments

None