Wilco Dijkstra writes:
> > +/* If X is a positive CONST_DOUBLE with a value that is the reciprocal of
> a
> > + power of 2 (i.e 1/2^n) return the number of float bits. e.g. for
> x==(1/2^n)
> > + return n. Otherwise return -1. */
> > +int
> > +aarch64_fpconst_pow2_recip (rtx x)
> > +{
Hi,
And a few more comments:
> +/* If X is a positive CONST_DOUBLE with a value that is the reciprocal of a
> + power of 2 (i.e 1/2^n) return the number of float bits. e.g. for
> x==(1/2^n)
> + return n. Otherwise return -1. */
> +int
> +aarch64_fpconst_pow2_recip (rtx x)
> +{
> +
On 18/06/2019 10:11, Joel Hutton wrote:
> Hi,
>
> On 13/06/2019 18:26, Wilco Dijkstra wrote:
>> Wouldn't it be easier to just do exact_log2 (real_to_integer (&r0))
>> and then check the range is in 1..31?
> I've revised this section.
>> --- a/gcc/config/aarch64/aarch64.md
>> +++ b/gcc/config/aarch
Hi Joel,
A few comments below:
+/* If X is a positive CONST_DOUBLE with a value that is the reciprocal of a
+ power of 2 (i.e 1/2^n) return the number of float bits. e.g. for x==(1/2^n)
+ return log2 (n). Otherwise return 0. */
+int
+aarch64_fpconst_pow2_recip (rtx x)
+{
+ REAL_VALUE_TYPE r
