Numbers -6 – Altera Floating-Point User Manual
Page 121
ALTFP_CONVERT Design Example: Convert Double-Precision Floating-
Point Format Numbers
This design example uses the ALTFP_CONVERT IP core to convert double-precision floating-point
format numbers to 64-bit integers. This design example uses the parameter editor in the Quartus II
software.
Related Information
•
Floating-Point IP Cores Design Example Files
on page 1-16
•
Provides the design example files for the Floating-Point IP cores
•
Provides information about installation, usage, and troubleshooting
ALTFP_CONVERT Design Example: Understanding the Simulation Results
The simulation waveform in this design example is not shown in its entirety. Run the design example files
in the ModelSim-Altera software to see the complete simulation waveforms.
This figure shows the expected simulation results in the ModelSim-Altera software.
Figure 17-1: ALTFP_CONVERT Simulation Waveform
This design example implements a float-to-integer converter for converting double-precision floating-
point format numbers to 64-bit integers. In this operation, the optional exception ports of
overflow
,
underflow
, and
nan
are available apart from the
result[]
port.
The latency for the float-to-integer operation is six clock cycles. Therefore, each conversion generates the
output result six clock cycles after receiving the input value.
This table lists the inputs and corresponding outputs obtained from the simulation in the waveform.
17-6
ALTFP_CONVERT Design Example: Convert Double-Precision Floating-Point Format
Numbers
UG-01058
2014.12.19
Altera Corporation
ALTFP_CONVERT IP Core