Embedded C for Digital Signal Processing - Signal Processing Systems - page 1252

between bits is actually used at every point in the program. This means that the
industry would benefit if Embedded C would support every conceivable partitioning
between integral and fractional bits.

9 Conclusions

Embedded C removes the need to use intrinsics or assembly to target fixed point
arithmetic found on typical DSP architectures. It thereby facilitates more readable
and portable programs. It facilitates a natural specification of memory spaces, where
one otherwise would have to resort to non-portable pragmas.
There will still be features of the architecture that may have to be targeted
through intrinsics, assembly, pragmas or other compiler-supported extensions. Good
examples are complex fixed point types or special Viterbi instructions. A Viterbi
instruction takes two arguments and produces two values and a flag. Such operations
are not easily captured in an expression.

References

1. www.embedded-c.org .
2. ACE Associated Compiler Experts bv. Cosy compiler development system.
3. ACE Associated Compiler Experts bv. Supertest.
4. ACE Associated Compiler Experts bv. DSP-C, An extension to ISO/IEC IS 9899:1990, www.
dsp-c.org . 2005.
5. Nullstone Corporation. www.nullstone.com .
6. Edison Design Group, Inc. www.edg.com .
7. ISO/IEC. International Standard ISO/IEC 9899:1999, Programming languages - C. 1999.
8. ISO/IEC. ISO/IEC TR 18037, Programming languages - C - Extensions to support embedded
processors. 2008.
9. Byte Craft Limited. www.bytecraft.com .
10. Dinkumware Ltd. www.dinkumware.com .
11. Perennial. www.peren.com .