Adding new meta-entity mult array (multiplication array generator) #13
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Details: * + enable the implementation of canonical NaN
Details: * + Implementing new generation mechanism for expression: * building node list ordered by depth to avoid too many level * of recursions during code generation
Details: * + Comparsion (Equal or NotEqual) of RTL_FixedPointFormat now relies on raw * logic vector comparison
Details: * + Adding PP tree compression algorithm: Wallace, Dadda, and * 4 to 2 based Wallace * + Refactor 3 to 2 and 4 to 2 compressor implementation using * bare logic rather than bit arithmetic
Details: * + output precision frac size was wrong
Details: * + adding support for command line option --method to select compression * method * + Adding 2-stage array compression with pipeline register insertion in * pipelined mode * + Implementing prototype for Wallace and Dadda reductions based on 4to2 * compressors * + Fixing support of accumulation operands
Details: * + mult_array's input arrival stage can now be configured * to an extra "[<stage>]" attribute after operation format * on the --mult-desc argument option * + partial input insertion and heaps reduction is performed at each stage * the limit of stage height can be set through --stage-height-limit * command line option (partially functionnal)
Details: * + fixing vhdl_code_generator generate_expr effect on optree which * was memoized as a CodeExpression and generated using force_input_variable * Translation between CodeExpression and CodeVariable is now performed * after memoization map access (and it includes result storage) * + adding proper __str__ method for CodeVariable and CodeExpression * classes * + code cleaning in code_generation.generator_utility module
Details: * + Adding clear error message when ML_Base_FixedPoint_Format * get_integer_coding value parameter exceeds format's bounds
Details: * + Partial Product computation in mult_array meta entity can now * be preceded by a booth radix-4 recoding and used it to reduce * the number of partial product bits generated * + This feature is enabled by the --booth command line option
Details: * + due to the overloading of ML_StdLogicVectorFormat's __eq__ method * its __hash__ method became None, making it "unhashable". It has been * fixed by fallbacking to its Parent ML_Format.__hash__ method
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