Developer Reference for Intel® oneAPI Math Kernel Library for Fortran
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p?labad
Returns the square root of the underflow and overflow thresholds if the exponent-range is very large.
Syntax
call pslabad(ictxt, small, large)
call pdlabad(ictxt, small, large)
Description
These routines are no-op and kept for compatibility reasons. They used to correct the overflow/underflow behavior of machines that are not IEEE-754–compliant.
Input Parameters
- ictxt
-
(global) INTEGER.
The BLACS context handle in which the computation takes place.
- small
-
(local).
REAL PRECISION for pslabad.
DOUBLE PRECISION for pdlabad.
On entry, the underflow threshold as computed by p?lamch.
- large
-
(local).
REAL PRECISION for pslabad.
DOUBLE PRECISION for pdlabad.
On entry, the overflow threshold as computed by p?lamch.
Output Parameters
- small
-
(local).
On exit, if log10(large) is sufficiently large, the square root of small, otherwise unchanged.
- large
-
(local).
On exit, if log10(large) is sufficiently large, the square root of large, otherwise unchanged.