Altera Stratix - Page 278

6–20 Altera Corporation
Stratix Device Handbook, Volume 2 July 2005
Operational Modes
summation block. You can use pipeline registers between the multiplier
stage and the summation block. The 36 × 36-bit multiplier supports
signed and unsigned operation.
The 36-bit multiplier is useful when your application needs more than
18-bit precision, for example, for mantissa multiplication of precision
floating-point arithmetic applications.