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Coding for SIMD Architectures 3
3-9
Figure 3-1 Converting to Streaming SIMD Extensions Chart
OM15156
Code benefits
from SIMD
STOP
Identify Hot Spots in Code
Integer or
floating-point?
Yes
Floating Point
Why FP?
Can convert
to Integer?
Range or
Precision
If possible, re-arrange data
for SIMD efficiency
Integer
Change to use
SIMD Integer
Yes
Change to use
Single Precision
Can convert to
Single-precision?
Yes
No
No
Align data structures
Convert to code to use
SIMD Technologies
Follow general coding
guidelines and SIMD
coding guidelines
Use memory optimizations
and prefetch if appropriate
Schedule instructions to
optimize performance
No
Performance