Fix issues with undefined behavior and compiler warnings #60
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I tested the changes with
make teston both x86_64 and arm.Note that even without these changes, on arm (
-ffast-math -mcpu=cortex-a7 -mfloat-abi=hard -mfpu=neon-vfpv4), I get ~1360 / 84663 failures, and on x86_64 (-march=corei7-avx), I get 1 / 84663 failures (dotprod_cccf_struct_lengths). It appears that the failures are all due to issues with floating-point tolerance, but I haven't verified each test result.