Hi Eric,
On Fri, Oct 02, 2020 at 10:26:24AM +0200, Eric Botcazou wrote:
> > Don't call it "mask" please: *all* of our basic rotate instructions
> > already have something called "mask" (that is the "m" in "rlwnm" for
> > example; and "rotlw d,a,b" is just an extended mnemonic for
> > "rlwnm d,a,b,
> Don't call it "mask" please: *all* of our basic rotate instructions
> already have something called "mask" (that is the "m" in "rlwnm" for
> example; and "rotlw d,a,b" is just an extended mnemonic for
> "rlwnm d,a,b,0,31"). The hardware also does not mask the shift amount
> at all (instead, only
Hi!
[ Please CC: me on rs6000 patches. Thanks! ]
On Tue, Sep 29, 2020 at 12:26:28PM +0200, Eric Botcazou wrote:
> and the masking is present all the way down to the assembly at -O2:
>
> rlwinm 4,4,0,27,31
> rotlw 3,3,4
>
> Now this masking is redundant since it's done by the ha
Hi,
the Interfaces package of the Ada library defines a pair of rotation operators
function Rotate_Left (Value : Unsigned_n; Amount : Natural)
return Unsigned_n;
function Rotate_Right (Value : Unsigned_n; Amount : Natural)
return Unsigned_n;
on modular (aka unsigned) types of
