****************************************************************************** ********************* 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. ****************************************************************************** PARSER VERSION NUMBER: 3.2.5 PLATFORM (SPARC, HP700, PC, etc.): HP OS AND VERSION: HP_UX (B.10.20) REPORTED BY: Michael Mirmak, Intel Corp. DATE: November 2, 2000 REVISED: November 17, 2000 DESCRIPTION OF BUG: "Dangling" models, present but not referenced or used in the file, are not flagged to the user. These include [Model]s which are not described in [Pin], [Model Selector] or [Driver Schedule] sections and also [Submodel]s which are not referenced by any [Add Submodel] declaration. Some indication -- most appropriately, a warning -- should be made of the lack of reference for these models and model fragments. An example: WARNING (line xxx) - Model xxx not referenced in [Pin], [Model Selector] or [Driver Schedule] sections. For Submodels: WARNING (line xxx) - Submodel xxx not referenced by [Add Submodel] keyword. This bug also applies to DOS32 IBISCHK3 v3.2.5. ADDITIONAL NOTES: As pointed out by Mike LaBonte of Cadence, this BUG should also apply to [Model]s which are not referenced in a [Series Pin Mapping] section. Therefore, a "dangling" [Model] is one which, while syntactically correct, is not referenced in [Pin], [Model Selector], [Driver Schedule] or [Series Pin Mapping] sections. Ian Dodd of Cadence raised the point that, for devices such as an FPGA, an unreferenced [Model] may be desirable in a user-ready model (such a [Model] might represent a available programming option which may or may not be implemented after the user configures the device). In addition, generating a message for every instance of an unreferenced [Model] may be unnecessarily confusing to the user. To address the above, the following changed messages are proposed: For one or more instances of an unreferenced [Model]: WARNING (line xxx) - [Model] zzz not referenced in [Pin], [Model Selector], [Driver Schedule] or [Series Pin Mapping] sections. Only one instance of the above warning message should be generated, for the first unreferenced [Model] in the file. Multiple unreferenced [Model]s in an IBIS file should NOT generate multiple warning messages. For Submodels: WARNING (line xxx) - [Submodel] zzz not referenced by [Add Submodel] keyword. As [Submodel]s should not exist independently of a referencing [Add Submodel] keyword, the above message should be generated for EVERY instance of an unreferenced [Submodel]. INSERT IBIS FILE DEMONSTRATING THE BUG: |*********************************************************************** | [IBIS Ver] 3.2 [File Name] bug49tst.ibs [File Rev] 0.0 [Date] 02-November-2000 [Source] File created from specification | [Disclaimer] (C) Copyright 2000 Intel Corp. All rights reserved This model is for demonstration purposes only. | | [Component] GENERIC_IBIS [Manufacturer] Intel Corp. | [Package] | typ min max R_pkg 6.0mO 5.0mO 7.0mO L_pkg 5.0nH 2.0nH 8.0nH C_pkg 1.0pF 0.5pF 1.5pF | | [Pin] signal_name model_name R_pin L_pin C_pin A1 TestSignal1 TestModel A2 TestSignal2 TestModel | |************************************************************************ | [Model] TestModel Model_type Output Polarity Non-Inverting Cref = 10.0pF C_comp 5.00pF 4.00pF 6.00pF | | [Temperature Range] 27.00 100.00 0.00 [Voltage Range] 3.30V 3.00V 3.60V [Pulldown] | voltage I(typ) I(min) I(max) | -3.3000 -20.0A -25.00A -15.00A 0.0000 0.0A -5.00nA 5.00nA 3.3000 40.00mA 32.00mA 48.00mA 6.6000 10.0A 12.0A 8.00A | [Pullup] | voltage I(typ) I(min) I(max) | -3.3000 10.00A 12.00A 8.00A 0.0000 0.0uA -0.30uA 0.30uA 3.3000 -65.00mA -40.00mA -80.00mA 6.6000 -22.00A -25.00A -19.00A | [Ramp] | variable typ min max dV/dt_r 0.35/1.6n 0.25/1.8n 0.45/1.5n dV/dt_f 0.35/1.6n 0.25/1.8n 0.45/1.5n R_load = 50.000 | |*************************************************************************** | [Model] TestModel2 Model_type Output Polarity Non-Inverting Cref = 10.0pF C_comp 5.00pF 4.00pF 6.00pF | | [Temperature Range] 27.00 100.00 0.00 [Voltage Range] 3.30V 3.00V 3.60V [Pulldown] | voltage I(typ) I(min) I(max) | -3.3000 -20.0A -25.00A -15.00A 0.0000 0.0A -5.00nA 5.00nA 3.3000 40.00mA 32.00mA 48.00mA 6.6000 10.0A 12.0A 8.00A | [Pullup] | voltage I(typ) I(min) I(max) | -3.3000 10.00A 12.00A 8.00A 0.0000 0.0uA -0.30uA 0.30uA 3.3000 -65.00mA -40.00mA -80.00mA 6.6000 -22.00A -25.00A -19.00A | [Ramp] | variable typ min max dV/dt_r 0.35/1.6n 0.25/1.8n 0.45/1.5n dV/dt_f 0.35/1.6n 0.25/1.8n 0.45/1.5n R_load = 50.000 | |*************************************************************************** [Submodel] Submodel Submodel_type Dynamic_clamp | [Power Clamp] | voltage I(typ) I(min) I(max) | -3.3000 10.00A 12.00A 8.00A 0.0000 0.0A 0.30A 0.30A 3.3000 0.00A 0.00A 0.00A 6.6000 0.00A 0.00A 0.00A |*************************************************************************** | [End] | | |Parser 3.2.5 responds with | |IBISCHK3 V3.2.5 | |Checking bug49tst.ibs for IBIS 3.2 Compatibility... | |Errors : 0 | |File Passed | ****************************************************************************** ******************** BELOW FOR ADMINISTRATION AND TRACKING ******************* ****************************************************************************** BUG NUMBER: 49 SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT] ENHANCEMENT PRIORITY: [HIGH, MEDIUM, LOW] LOW STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG] CLOSED FIXED VERSION: Version 3.2.8 FIXED DATE: November 20, 2001 NOTES ON BUG FIX: Classified at the November 17, 2000 IBIS Meeting. More discussion is planned to decide on its resolution. To be put on the list to be fixed at the February 16, 2001 IBIS Meeting. ****************************************************************************** ******************************************************************************