LAPACK 3.12.0
LAPACK: Linear Algebra PACKage
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◆ ieeeck()

integer function ieeeck ( integer ispec,
real zero,
real one )

IEEECK

Download IEEECK + dependencies [TGZ] [ZIP] [TXT]

Purpose:
!>
!> IEEECK is called from the ILAENV to verify that Infinity and
!> possibly NaN arithmetic is safe (i.e. will not trap).
!>
Parameters
[in]ISPEC
!>          ISPEC is INTEGER
!>          Specifies whether to test just for infinity arithmetic
!>          or whether to test for infinity and NaN arithmetic.
!>          = 0: Verify infinity arithmetic only.
!>          = 1: Verify infinity and NaN arithmetic.
!>
[in]ZERO
!>          ZERO is REAL
!>          Must contain the value 0.0
!>          This is passed to prevent the compiler from optimizing
!>          away this code.
!>
[in]ONE
!>          ONE is REAL
!>          Must contain the value 1.0
!>          This is passed to prevent the compiler from optimizing
!>          away this code.
!>
!>  RETURN VALUE:  INTEGER
!>          = 0:  Arithmetic failed to produce the correct answers
!>          = 1:  Arithmetic produced the correct answers
!>
Author
Univ. of Tennessee
Univ. of California Berkeley
Univ. of Colorado Denver
NAG Ltd.