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********************* IBIS GOLDEN PARSER BUG REPORT FORM *********************
******************************************************************************

INSTRUCTIONS

To report a bug in the IBIS golden parser.  Please fill out the top part
of the following form and send the complete form to ibischk-bug@vhdl.org.

A list of reported bugs will be maintained on vhdl.org.

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PARSER VERSION NUMBER:
    Found in IBISCHK3 V3.2.1 UNIX


PLATFORM (SPARC, HP700, PC, etc.):
    ALL

OS AND VERSION:
    ALL

REPORTED BY: Chris Rokusek, Viewlogic Systems

DATE: 1/13/99

DESCRIPTION OF BUG:

    When Only the Vinl is overridden using the [Model Spec] keyword the
    checking code will cause a seg fault.

    From a glance at the source code this effect appears to exist for each
    subsection (e.g. D_overshoot, Pulse) within the [Model Spec] block.

    The following proposed fix would need to be applied to all
    similar functions within the source (taken from mspec.c):


    static void
    s_CheckThresholds(MSPEC *pMspec)
    {
        RNG *r;
        double typ, min, max;

        /* if none of the Hysteresis parameters are specified do nothing */
        if(  !pMspec->pVinh && !pMspec->pVinl ) {
                return;
        }

        /* check the min, typ and max values */

#if 0
        r = pMspec->pVinh;
        if( r->eTypStat == SET ) {   /* r is NULL here */
#else
        if (( r = pMspec->pVinh ) &&   /* assign ok, check for NULL */
            ( r->eTypStat == SET )) {
#endif
             typ =  r->dTyp;

             min = (r->eMinStat == SET) ? r->dMin : typ;
             max = (r->eMaxStat == SET) ? r->dMax : typ;

             /* check min <= typ <= max  or  max <= typ <= min */
             if(!(min <= typ && typ <= max ) && !(max <= typ && typ <= min))
{
                     ERRLOG_Warn(sErMinMax, "Vinh", gMspecBeginLine );
             }

        }

        <...>
     }



INSERT IBIS FILE DEMONSTRATING THE BUG:
[IBIS ver]       3.0
[File name]      mspec_ok.ibs
[File Rev]       0.0
[Date]           1/13/99
[Source]
[Notes]          This model is bogus.
[Disclaimer]
[Copyright]
|
|************************************************************************
|                             Component mspectest
|************************************************************************
|
[Component]      mspectest
[Manufacturer]   None
[Package]
| variable       typ                 min                 max
R_pkg            2.00m               1.00m               3.00m
L_pkg            5.00nH              4.00nH              6.00nH
C_pkg            8.00pF              7.00pF              9.00pF
|
[Pin]  signal_name          model_name
1      t1                   mCheck
|
|************************************************************************
|                           Model mCheck
|************************************************************************
|
[Model]          mCheck
Model_type       Input
Vinl=  1.5
Vinh=  3.5
C_comp           5.00pF              5.00pF              5.00pF
|
| ... this should be OK since the model thresholds will be used
[Model Spec]
Pulse_high                3V        2.5V        3.5V
Pulse_low                 1.2V       .5V         1.5V
Pulse_time                1.1n       .5n         1.5n
|
| **BUG**
|
| When the Vinh below is commented out error occurs
| From a glance at the source code, this effect will
| probably also occur within each "set" below when
| one row is commented out
|
Vinl  1.6 1.4 1.7
|Vinh  3.6 3.4 3.7
|
| FALLING
Vinl+ 3.62 3.61 3.63
Vinl- 1.62 1.61 1.63
|
| RISING
Vinh+ 3.42 3.41 3.43
Vinh- 1.42 1.41 1.43
|
S_overshoot_high 5.1 5.09 5.11
S_overshoot_low  -.1 -.11 -.09
|
|
D_overshoot_high 5.5 5.51 5.49
D_overshoot_low  -.2 -.21 -.19
D_overshoot_time .5n .4n .6n
|
|
[Temperature Range]       50.00               100.00              0.00
[Voltage Range]           5.00V               4.50V               5.50V
|
| End [Component] mspectest
|
[End]


******************************************************************************
******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
******************************************************************************

BUG NUMBER:  35

SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT]   SEVERE

PRIORITY: [HIGH, MEDIUM, LOW]                                HIGH

STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG]              CLOSED

FIXED VERSION: 3.2.2

FIXED DATE: January 1999

NOTES ON BUG FIX: This has been fixed and will be closed when verified.


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