floating point - How to turn off denormal number support in MATLAB? -

floating point - How to turn off denormal number support in MATLAB? -

i trying turn off denormal number back upwards in matlab, 2 computations result in denormal number instead result in 0 (daz, ftz)

i've researched several sites include 1 below, haven't found doing this.

http://blogs.mathworks.com/cleve/2014/07/21/floating-point-denormals-insignificant-but-controversial-2/

i've never heard of such alternative in matlab. require deep manipulation of lot of floating-point math, requiring new datatype supported if toggle-able alternative in matlab. write own mex c code (more here , here) individual function.

and of course of study can 1 line of matlab – here's example:

a = [1e-300 1e-310 1e-310]; b = [1e-301 1e-311 1e-310]; x = a-b; x(abs(x(:)) < realmin(class(x))) = 0;

where realmin smallest normalized floating-point number. however, floating point math still performed using extended denormal/subnormal values in a. it's output that's clipped zero.

unless you're doing fun experimentation, or perchance running code on embedded platform, i'd recommend against disabling denormals form of optimization. instead, focus on why values little , how might rescale problem avoid issue entirely.

matlab floating-point