Stratix GX Architecture
the capabilities for dynamic and mixed sign multiplications are handled
differently. The following list provides the largest functions that can fit
into a single DSP block.
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■
■
■
■
■
■
■
■
36 × 36-bit unsigned by unsigned multiplication
36 × 36-bit signed by signed multiplication
35 × 36-bit unsigned by signed multiplication
36 × 35-bit signed by unsigned multiplication
36 × 35-bit signed by dynamic sign multiplication
35 × 36-bit dynamic sign by signed multiplication
35 × 36-bit unsigned by dynamic sign multiplication
36 × 35-bit dynamic sign by unsigned multiplication
35 × 35-bit dynamic sign multiplication when the sign controls for
each operand are different
■
36 × 36-bit dynamic sign multiplication when the same sign control
is used for both operands
1
This list only shows functions that can fit into a single DSP block.
Multiple DSP blocks can support larger multiplication
functions.
Figure 4–28 shows one of the columns with surrounding LAB rows.
Altera Corporation
February 2005
4–47
Stratix GX Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
