[Bug target/63408] [4.9/5/6 regression] GCC emits incorrect fixed->fp conversion instruction on Cortex-M4 target
ramana at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Tue Jun 23 13:48:00 GMT 2015
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63408
--- Comment #11 from Ramana Radhakrishnan <ramana at gcc dot gnu.org> ---
(In reply to Itay Perl from comment #10)
> A few examples:
>
> a=100, b=0x7fffffff -O0: 0.0 -O3: 200.0
> a=0, b=0x7fffffff/100.0f -O0: -1.0 -O3: 1.0
> a=0, b=-0x7fffffff/100.0f -O0: 1.0 -O3: -1.0
>
> Replacing vfma with vfms sounds correct to me, and returns the correct
> result for the above inputs.
Thanks - I'm testing a fix.
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