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Compiler/TMS320C6655: Trig Math Library

Mark Ackerson
Genius 10190 points

Part Number: TMS320C6655
Other Parts Discussed in Thread: MATHLIB

Tool/software: TI C/C++ Compiler

Customer recently tried to speed up one function (wrote in C++) running on TI DSP C66X device. They replaced C standard library function cosf() and sinf() with cossp_i() and sinsp_i() from MATHLIB  3_1_2_1. I re-run the same test and found that cossp_i() and sinsp_i() from MATHLIB  3_1_2_1 are substantially slower than C standard library function cosf() and sinf().

Any idea what the problem could be?

Thanks,
Mark