zouboan opened a new pull request #5307:
URL: https://github.com/apache/incubator-nuttx/pull/5307
## Summary
there's lack a fabsf for x in
float frexpf(float x, int *exponent)
{
*exponent = (int)ceilf(log2f(x));
return x / ldexpf(1.0F, *exponent);
}
## Impact
when input x<0,the result of
frexpf(x, e) is wrong
## Testing
tested on stm32f405RGT6,after the patch:
input number = -60;
float sig = frexpf(number, &e);
sig = -0.9375
e = 6;
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