Returns the square root of the underflow and overflow thresholds if the exponent-range is very large.
call pslabad(ictxt, small, large)
call pdlabad(ictxt, small, large)
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.
(global) INTEGER.
The BLACS context handle in which the computation takes place.
(local).
REAL PRECISION for pslabad.
DOUBLE PRECISION for pdlabad.
On entry, the underflow threshold as computed by p?lamch.
(local).
REAL PRECISION for pslabad.
DOUBLE PRECISION for pdlabad.
On entry, the overflow threshold as computed by p?lamch.
(local).
On exit, if log10(large) is sufficiently large, the square root of small, otherwise unchanged.
(local).
On exit, if log10(large) is sufficiently large, the square root of large, otherwise unchanged.