Lookup Table Blocks

hisl_0033: Usage of Lookup Table blocks

ID: Title	hisl_0033: Usage of Lookup Table blocks
Description	To support robustness of generated code, when using the 1-D Lookup Table, 2-D Lookup Table, n-D Lookup Table, Prelookup, and Interpolation Using Prelookup blocks:
	A	Clear block parameter Remove protection against out-of-range input in generated code in each 1-D Lookup Table, 2-D Lookup Table, n-D Lookup Table, or Prelookup block.
	B	Clear block parameter Remove protection against out-of-range index in generated code in each Interpolation Using Prelookup block.
Note	If the lookup table inputs are not guaranteed to fall within the range of valid breakpoint values, exclusion of range-checking code may produce unexpected results.
Rationale	A,B	Protect against out-of-range inputs or indices.
Model Advisor Checks	Check usage of lookup table blocks (Simulink Check)
References	DO-331, Section MB.6.3.2.g 'Algorithms are accurate' IEC 61508-3, Table A.3 (3) 'Language subset’ IEC 61508-3, Table A.4 (3) 'Defensive programming’ IEC 62304, 5.5.3 - Software Unit acceptance criteria ISO 26262-6, Table 1 (1b) 'Use of language subsets' ISO 26262-6, Table 1 (1d) 'Use of defensive implementation techniques' EN 50128, Table A.4 (11) 'Language Subset' EN 50128, Table A.3 (1) 'Defensive Programming'
See Also	1-D Lookup Table 2-D Lookup Table n-D Lookup Table Prelookup
Last Changed	R2021a