[LAD] A more efficient way to detect INF and/or NAN in a block of samples

I want to detect INFs and NANs in my DSP graph to avoid having them spread and cause various trouble. Here is the straight forward way: int i; for (i=0;i<num_samples;i++) if (!isfinite(samples[i])) break if(i!=num_samples) error(); But is this as efficient as we get it? I'm wondering if comparing samples using for instance SIMD instructions, for instance, could make it around 4 times faster, Something like this: for(i=0;i<num_samples;i++) if(samples[i]!=samples[i])) break; where the samples[i]!=samples[i] test would succeed if it was a nan or inf, since INFs and NANs don't behave normally. I don't think this particular example works though (?), but perhaps something similar could? Anyone doing something like this?