Re: Optimization bug with floating-point?

From: Steve Kargl <sgk_at_troutmask.apl.washington.edu>
Date: Wed, 13 Mar 2019 08:08:54 -0700
On Tue, Mar 12, 2019 at 07:45:41PM -0700, Steve Kargl wrote:
> 
> cc -O -fno-builtin -o z a.c -lm && ./z
> cc -O2 -fno-builtin -o z a.c -lm && ./z
> cc -O3 -fno-builtin -o z a.c -lm && ./z
> 
> 
> Max ULP: 23.061242
> Count: 39          (# of ULP that exceeds 21)
> 

These results do not change if one uses /usr/local/bin/clang60.

-- 
Steve
Received on Wed Mar 13 2019 - 14:08:56 UTC

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