Finally, due to the very high accuracy achieved by the approximate prolate and Knab window as well as the NUFFT, the minimum achieved coherence values have been, for the double precision
case, equal to 1 in all the three cases.
It is the IEEE 754 double precision
floating point format of decimal 8.1.
else Compute and factor A[D.sup.2][A.sup.T] in double precision
non-packed form using the CPU.
However, in single precision and double precision
a change in the underflow strategy, as well as double rounding in some underflow cases, was detected by our test tool.
In the case of the supercomputers (CRAY Y-MP, NEC SX-2, and CRAY-2), single and double precision
correspond to 64 and 128 bits.
Maximum differences with double precision
are about half as big, although RMS differences are nearly the same at 30 h and are about two-thirds the size of the single-precision value at 36 h.
As a result, for the case of [n.sub.C] = 4 and [n.sub.G] = 2, the optimum solution of [N.sub.C]/(N/2) equals 0.016 and 0.083 for single and double precision
Furthermore, for double precision
, based on the function fetch_double (), we rewrite
Notice how by increasing the size of the block, the execution time decreases exponentially to a limit or an asymptotic time which in double precision
is of 81 s and in single precision of 37 s.
* computations in double precision
are performed four times faster.
The Quadro 4000 for the Mac also features fast 64-bit double precision
floating point capabilities to ensure accurate results in the case of mission critical applications, such as medical imaging and structural analysis.
So according to IEEE 754 standard we used double precision
floating point format to encode float numbers to binary format.