IQmath Library
IQmath Library
IQmath Library
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IQNmag<br />
Magnitude of IQ complex number<br />
Description<br />
This function calculates the magnitude of two orthogonal vectors as<br />
follows: Mag = sqrt(A^2 + B^2). This operation achieves better accuracy<br />
and avoids overflow problems that may be encountered by using the<br />
"_IQsqrt" function.<br />
A<br />
B<br />
IQNmag<br />
output<br />
Availability<br />
C-Callable Assembly (CcA)<br />
Module Properties<br />
Type: Target Independent, Application Independent<br />
Target Devices: x28xx<br />
C/CPP Interface Files: <strong>IQmath</strong>Lib.h, <strong>IQmath</strong>CPP.h & <strong>IQmath</strong>.lib<br />
Item C-Callable ASM Comments<br />
Code Size<br />
96 words<br />
Data RAM<br />
0 words<br />
Multiple instances N/A<br />
Reentrancy Yes<br />
Multiple Invocation Yes<br />
Stack usage 2 words Stack grows by 2 words<br />
Accuracy<br />
29-bits (Same as SQRT function)<br />
©Texas Instruments Inc., June 2002 61
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