Re: [PATCH] x86: Cast stride to __PTRDIFF_TYPE__ in AMX intrinsics

["H.J. Lu" <hjl.tools@gmail.com>]

On Mon, Aug 22, 2022 at 7:05 PM Hongtao Liu <crazylht@gmail.com> wrote:
>
> On Tue, Aug 23, 2022 at 1:02 AM H.J. Lu <hjl.tools@gmail.com> wrote:
> >
> > On 64-bit Windows, long is 32 bits and can't be used as stride in memory
> > operand when base is a pointer which is 64 bits.  Cast stride to
> > __PTRDIFF_TYPE__, instead of long.
> Ok.
> >
> >         PR target/106714
> >         * config/i386/amxtileintrin.h (_tile_loadd_internal): Cast to
> >         __PTRDIFF_TYPE__.
> >         (_tile_stream_loadd_internal): Likewise.
> >         (_tile_stored_internal): Likewise.
> > ---
> >  gcc/config/i386/amxtileintrin.h | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/gcc/config/i386/amxtileintrin.h b/gcc/config/i386/amxtileintrin.h
> > index 7b5a39eba72..06f18aa9bfb 100644
> > --- a/gcc/config/i386/amxtileintrin.h
> > +++ b/gcc/config/i386/amxtileintrin.h
> > @@ -62,7 +62,7 @@ _tile_release (void)
> >  #define _tile_loadd_internal(dst,base,stride)                          \
> >    __asm__ volatile                                                     \
> >    ("{tileloadd\t(%0,%1,1), %%tmm"#dst"|tileloadd\t%%tmm"#dst", [%0+%1*1]}" \
> > -   :: "r" ((const void*) (base)), "r" ((long) (stride)))
> > +   :: "r" ((const void*) (base)), "r" ((__PTRDIFF_TYPE__) (stride)))
> >
> >  #define _tile_stream_loadd(dst,base,stride)            \
> >    _tile_stream_loadd_internal (dst, base, stride)
> > @@ -70,7 +70,7 @@ _tile_release (void)
> >  #define _tile_stream_loadd_internal(dst,base,stride)                   \
> >    __asm__ volatile                                                     \
> >    ("{tileloaddt1\t(%0,%1,1), %%tmm"#dst"|tileloaddt1\t%%tmm"#dst", [%0+%1*1]}" \
> > -   :: "r" ((const void*) (base)), "r" ((long) (stride)))
> > +   :: "r" ((const void*) (base)), "r" ((__PTRDIFF_TYPE__) (stride)))
> >
> >  #define _tile_stored(dst,base,stride)          \
> >    _tile_stored_internal (dst, base, stride)
> > @@ -78,7 +78,7 @@ _tile_release (void)
> >  #define _tile_stored_internal(src,base,stride)                         \
> >    __asm__ volatile                                                     \
> >    ("{tilestored\t%%tmm"#src", (%0,%1,1)|tilestored\t[%0+%1*1], %%tmm"#src"}" \
> > -   :: "r" ((void*) (base)), "r" ((long) (stride)) \
> > +   :: "r" ((void*) (base)), "r" ((__PTRDIFF_TYPE__) (stride)) \
> >     : "memory")
> >
> >  #define _tile_zero(dst)                                \
> > --
> > 2.37.2
> >
>
>
> --
> BR,
> Hongtao

OK to backport it to GCC 12 branch?


-- 
H.J.