Visible to Intel only — GUID: GUID-8D502B99-B02A-49AE-9BF2-8468F4EFF28F
Visible to Intel only — GUID: GUID-8D502B99-B02A-49AE-9BF2-8468F4EFF28F
?lamc5
Called from ?lamc2. Attempts to compute the largest machine floating-point number, without overflow.
Syntax
call slamc5( beta, p, emin, ieee, emax, rmax)
call dlamc5( beta, p, emin, ieee, emax, rmax)
Include Files
- mkl.fi
Description
The routine ?lamc5 attempts to compute rmax, the largest machine floating-point number, without overflow. It assumes that emax + abs(emin) sum approximately to a power of 2. It will fail on machines where this assumption does not hold, for example, the Cyber 205 (emin = -28625, emax = 28718). It will also fail if the value supplied for emin is too large (that is, too close to zero), probably with overflow.
Input Parameters
- beta
-
INTEGER. The base of floating-point arithmetic.
- p
-
INTEGER. The number of base beta digits in the mantissa of a floating-point value.
- emin
-
INTEGER. The minimum exponent before (gradual) underflow.
- ieee
-
LOGICAL. A logical flag specifying whether or not the arithmetic system is thought to comply with the IEEE standard.
Output Parameters
- emax
-
INTEGER. The largest exponent before overflow.
- rmax
-
REAL for slamc5
DOUBLE PRECISION for dlamc5
The largest machine floating-point number.