FreeLists / si-list / [SI-LIST] Re: Getting Hspice to accept numbers with mantissa' s larger than 8 characters

["Buchs, Kevin J." <buchs.kevin@xxxxxxxx>]

Here is a demonstration that shows the double precision nature of
parameters.   Note, if you want post output, you should not use post=2
(ASCII) because that will not work.  Use binary, post=1.  The print output
works fine.

.option numdgt=10 post=1 probe post_version=2001
.param rvalue1=1.000000001
va a 0 1.0
r1 a 0 'rvalue1'
r2 a 0 1.0
.param rvaluea2=1.0
.param rvalueb2=1E-12
.param rvalue2='rvaluea2+rvalueb2'
r3 a 0 'rvalue2'
.print i1(r1) i1(r2) i1(r3)
.probe i1(r1) i1(r2) i1(r3)
.tran 1ps 1ps
.end

You can use this command on Linux to dump the double floats out of the
results file and see that they are truly doubles.  A plotting program such
as cosmoscope can read this. 

> od -j 476 -t fD dbl_precision.tr0
0000734   0.000000000000000e+00   9.999999989999999e-01
0000754   1.000000000000000e+00   9.999999999989999e-01
0000774   9.999999989999999e-01   1.000000000000000e+00
0001014   9.999999999989999e-01   1.250000000000000e-13
0001034   9.999999989999999e-01   1.000000000000000e+00
0001054   9.999999999989999e-01   9.999999989999999e-01
0001074   1.000000000000000e+00   9.999999999989999e-01
0001114   2.500000000000000e-13   9.999999989999999e-01
0001134   1.000000000000000e+00   9.999999999989999e-01
0001154   9.999999989999999e-01   1.000000000000000e+00
0001174   9.999999999989999e-01   5.000000000000000e-13
0001214   9.999999989999999e-01   1.000000000000000e+00
0001234   9.999999999989999e-01   9.999999989999999e-01
0001254   1.000000000000000e+00   9.999999999989999e-01
0001274   7.500000000000000e-13   9.999999989999999e-01
0001314   1.000000000000000e+00   9.999999999989999e-01
0001334   9.999999989999999e-01   1.000000000000000e+00
0001354   9.999999999989999e-01   1.000000000000000e-12
0001374   9.999999989999999e-01   1.000000000000000e+00
0001414   9.999999999989999e-01   9.999999989999999e-01
0001434   1.000000000000000e+00   9.999999999989999e-01
0001454   1.000000015047466e+30  1.699585821693888e-321


Kevin Buchs   Mayo Clinic  200 1st St. SW  Rochester, MN 55901
buchs.kevin@xxxxxxxx  507-538-5459 http://www.mayo.edu/sppdg 
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