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Altera Corporation
v
Contents
December 1996
About this Quick Reference Guide...............................................................................................................iii
How to Contact Altera..........................................................................................................................iii
Typographic Conventions....................................................................................................................iv
Section 1: Introduction
...............................................................................................................................1
Overview..................................................................................................................................................1
History of LPM........................................................................................................................................1
LPM Features...........................................................................................................................................2
LPM Functions ........................................................................................................................................2
Section 2: Gate Functions
..........................................................................................................................3
lpm_and
...................................................................................................................................................4
lpm_bustri
............................................................................................................................................5
lpm_clshift
.........................................................................................................................................6
lpm_constant
.......................................................................................................................................7
lpm_decode
............................................................................................................................................8
lpm_inv
...................................................................................................................................................9
lpm_mux
.................................................................................................................................................10
busmux
...................................................................................................................................................11
mux
..........................................................................................................................................................12
lpm_or
...................................................................................................................................................13
lpm_xor
.................................................................................................................................................14
Section 3: Arithmetic Functions
............................................................................................................15
lpm_abs
.................................................................................................................................................16
lpm_add_sub
.......................................................................................................................................17
lpm_compare
.......................................................................................................................................19
lpm_counter
.......................................................................................................................................21
lpm_mult
..............................................................................................................................................23