Altera Floating-Point - Manual (Page 76)

DATAA[] Calculation RESULT[] NaN Overflow Underflow Zero
Normal (numbers
of small magnitude)
edata 1 0 0 1 0
Normal (negative
numbers of large
magnitude)
edata 0 0 0 1 0
Denormal e0 1 0 0 0 0
Zero e0 1 0 0 0 0
Infinity (+) e+ Infinity 0 0 0 0
Infinity (-) e- 0 0 0 0 1
NaN — NaN 1 0 0 0
ALTFP_EXP Resource Utilization and Performance
This table lists the resource utilization and performance information for the ALTFP_EXP IP core. The
information was derived using the Quartus II software version 10.0.
Table 9-2: ALTFP_EXP Resource Utilization and Performance for Stratix IV Devices
Device Family Precision
Output
Latency
Logic usage
f
MAX
(MHz)
Adaptive
Look-Up
Tables
(ALUTs)
Dedicated
Logic
Registers
(DLRs)
Adaptive
Logic
Modules
(ALMs)
18-bit DSP
Stratix IV
Single 17 631 521 448 19 284
Double 25 4,104 2,007 2,939 46 279
ALTFP_EXP Design Example: Exponential of Single-Precision Format
Numbers
This design example uses the ALTFP_EXP IP core to compute the exponential value of single-precision
format numbers. This example uses the MegaWizard Plug-In Manager in the Quartus II software.
Related Information
• Floating-Point IP Cores Design Example Files on page 1-16
• Floating-Point IP Cores Design Examples
Provides the design example files for the Floating-Point IP cores
• ModelSim-Altera Software Support
Provides information about installation, usage, and troubleshooting
(2) Any denormal input is treated as a zero before going through the exponential process.
9-2 ALTFP_EXP Resource Utilization and Performance
UG-01058
2014.12.19
Altera Corporation ALTFP_EXP IP Core
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