[PATCH][ARM][1/4] Replace uses of int_log2 by exact_log2

[Kyrill Tkachov]

I wanted to ping this patch, but checking the gcc-patches archive I see this wasn't
archived, though I have confirmed that the patch was sent out and distributed by
the mail server correctly.

Anyway, resending...

Thanks,
Kyrill

On 24/05/16 14:25, Kyrill Tkachov wrote:
> Hi all,
>
> The int_log2 function in arm.c is not really useful since we already have a generic function for calculating
> the log2 of HOST_WIDE_INTs. The only difference in functionality is that int_log2 also asserts that the result
> is no greater than 31.
>
> This patch removes int_log2 in favour of exact_log2 and adds an assert on the result to make sure the return
> value was as expected.
>
> Bootstrapped and tested on arm-none-linux-gnueabihf.
>
> Is this ok? Or is there something I'm missing about int_log2?
>
> Thanks,
> Kyrill
>
> 2016-05-24  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
>
>     * config/arm/arm.c (int_log2): Delete definition and prototype.
>     (shift_op): Use exact_log2 instead of int_log2.
>     (vfp3_const_double_for_fract_bits): Likewise.

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