Altera Floating-Point Bedienungsanleitung Seite 115

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Table 16-5: 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.
UG-01058
2014.12.19
ALTFP_COMPARE Parameters
16-5
ALTFP_COMPARE IP Core
Altera Corporation
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