Floating-Point IP Cores User Guide

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ID 683750
Date 9/13/2021
Public
Document Table of Contents

14.6. ALTFP_COMPARE Parameters

Table 82.  ALTFP_COMPARE Parameters
Port Name Type Required Description
WIDTH_EXP Integer Yes Specifies the precision of the exponent. If this parameter is not specified, the default is 8. The bias of the exponent is always set to 2 (WIDTH_EXP - 1) - 1, that is, 127 for the single-precision format and 1023 for the double-precision format. The value of WIDTH_EXP must be 8 for the single-precision format, 11 for the double-precision format, and a minimum of 11 for the single-extended precision format. The value of WIDTH_EXP must be less than the value of WIDTH_MAN, and the sum of WIDTH_EXP and WIDTH_MAN must be less than 64.
WIDTH_MAN Integer Yes Specifies the precision of the mantissa. If this parameter is not specified, the default is 23. When WIDTH_EXP is 8 and the floating-point format is single-precision, the WIDTH_MAN value must be 23. Otherwise, the value of WIDTH_MAN must be a minimum of 31. The value of WIDTH_MAN must be greater than the value of WIDTH_EXP, and the sum of WIDTH_EXP and WIDTH_MAN must be less than 64.
PIPELINE Integer Yes Specifies the latency in clock cycles used in the ALTFP_COMPARE IP core. The pipeline values are 1, 2, and 3 latency in clock cycles.

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