lpm divider output binary format

FPGA Intellectual Property

PCI Express*, Networking and Connectivity, Memory Interfaces, DSP IP, and Video IP

lpm divider output binary format

856 Views

Is there an easy way to determine or predict the output fixed-point binary format of the lpm_divide function based on the formats of the inputs? I know if multiplying a Qm.n number (e.g. Q16.8 which has 16 integer bits & 8 fractional bits) by a Qp.q number, the output will be Q(m+p).(n+q), e.g. multiplying Q16.8 by Q4.8 will yield a Q20.16 output. For the divider, I used a numerator of Q24.8 and denomiator Q8.8 and it yielded a quotient in Q32.0 and remainder in Q8.8, but I had to determine that by trial & error. Someone know an easier way to know the formats in advance?

Thanks, GMM

Link Copied

0 Replies

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.