On Fri, Mar 25, 2022 at 6:08 PM Hongyu Wang <wwwhhhyyy...@gmail.com> wrote:
>
> Is it possible to create a test case that gas would throw an error for
> invalid operands?

You can use -ffix-xmmN to disable XMM0-15.

> H.J. Lu via Gcc-patches <gcc-patches@gcc.gnu.org> 于2022年3月26日周六 04:50写道:
> >
> > Since KL instructions have no AVX512 version, replace the "v" register
> > constraint with the "x" register constraint.
> >
> >         PR target/105058
> >         * config/i386/sse.md (loadiwkey): Replace "v" with "x".
> >         (aes<aesklvariant>u8): Likewise.
> > ---
> >  gcc/config/i386/sse.md | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
> > index 29802d00ce6..33bd2c4768a 100644
> > --- a/gcc/config/i386/sse.md
> > +++ b/gcc/config/i386/sse.md
> > @@ -28364,8 +28364,8 @@ (define_insn "avx512f_dpbf16ps_<mode>_mask"
> >
> >  ;; KEYLOCKER
> >  (define_insn "loadiwkey"
> > -  [(unspec_volatile:V2DI [(match_operand:V2DI 0 "register_operand" "v")
> > -                         (match_operand:V2DI 1 "register_operand" "v")
> > +  [(unspec_volatile:V2DI [(match_operand:V2DI 0 "register_operand" "x")
> > +                         (match_operand:V2DI 1 "register_operand" "x")
> >                           (match_operand:V2DI 2 "register_operand" "Yz")
> >                           (match_operand:SI   3 "register_operand" "a")]
> >                          UNSPECV_LOADIWKEY)
> > @@ -28498,7 +28498,7 @@ (define_int_attr aesklvariant
> >     (UNSPECV_AESENC256KLU8 "enc256kl")])
> >
> >  (define_insn "aes<aesklvariant>u8"
> > -  [(set (match_operand:V2DI 0 "register_operand" "=v")
> > +  [(set (match_operand:V2DI 0 "register_operand" "=x")
> >         (unspec_volatile:V2DI [(match_operand:V2DI 1 "register_operand" "0")
> >                                (match_operand:BLK   2 "memory_operand" "m")]
> >                               AESDECENCKL))
> > --
> > 2.35.1
> >



-- 
H.J.

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