Can we revert "avoid 64-bit intrinsics on 32-bit Windows"?

[Paul Eggert]

On 01/06/2015 08:51 AM, Paul Eggert wrote:
> -# pragma intrinsic _BitReverse
> -# pragma intrinsic _BitReverse64
> +# pragma intrinsic _BitScanReverse
> +# pragma intrinsic _BitScanReverse64

Come to think of it, now that this typo is fixed, we should be able to 
revert the "avoid 64-bit intrinsics on 32-bit Windows" patch, right?  
That patch added complexity that I'd rather avoid.  I think the previous 
diagnosis that the intrinsic is missing on 32-bit Windows is incorrect.

If we really need something like that patch, let's put it into the 
"#elif _MSC_VER" section so that it's more easily separable from the 
mainline code.  For now I reverted it by using the attached.

0001-count-leading-zeros-use-64-bit-intrinsics-on-32-bit-.patch
Description: Text Data