Advantages of DSP library

Posted on April 27, 2005 at 07:55

Hello,

I want to use the arithmetic functions of the DSP library to optimize a controller function. Does the involvement of the MAC unit really give an advantage in time.

e.g the normal operation c=a-b where a,b,c are of type int takes 10 instruction cycles

but the use of sub_16(...) of the library uses also 10 instruction cycles (see pdf file)

How can I use the DSP library to optimize a function which uses fix point variables?

Thank you very much for your support.

:-?

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Attachments :

st10dsplib.pdf : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I09Y&d=%2Fa%2F0X0000000bYl%2F0byxZpz9AZLhKONDkJZ6sc8Yys0igbqbc2srhndW4mw&asPdf=false