On Mon, Aug 14, 2017 at 1:25 PM, Maciej W. Rozycki <macro@xxxxxxxxxx> wrote:
> On Mon, 14 Aug 2017, Manuel Lauss wrote:
>
>> ---
>> v2: just use xor, as suggested by Maciej. No size changes this time, but still
>> untested due to lack of hardfloat userland.
>
> D'oh, I was wondering what you meant by writing: "binary size reduction"
> and didn't get that you meant a size reduction of the binary object file
> produced rather than a transformation made by the compiler to the binary
> expression used. That looks odd indeed -- have you tried comparing the
> output from `objdump -d' with and without the original patch applied?
>
> Your change looks obviously correct to me, however I can push it through
> GCC and/or glibc IEEE 754 math regression testing if it'll make you feel
> more confident about it.
No need. I've updated to gcc-7.2 and the differences are gone, the binary
cp1emu.o created with and without this patch are completely identical.
Thanks!
Manuel
