Re: [Qemu-devel] [5123] Fix y register loads and stores

["Blue Swirl" <blauwirbel@gmail.com>]

On 9/2/08, Vince Weaver <vince@csl.cornell.edu> wrote:
>
>
> > So something is wrong with the sign extension.  Unfortunately I won't have
> time to look into this more until tomorrow, but I wanted to just get this
> out there.
> >
>
>  I did have time to look at it in the end.
>
>  Here's a patch that fixes my test case.  I'll have to look at the sparcv9
> manual closer to make sure it's the right thing to do.
>
>  Vince
>
>  --- ./target-sparc/translate.c.orig     2008-09-01
> 19:03:10.000000000 -0400
>  +++ ./target-sparc/translate.c  2008-09-01 19:02:54.000000000 -0400
>  @@ -793,8 +793,8 @@
>      r_temp = tcg_temp_new(TCG_TYPE_I64);
>      r_temp2 = tcg_temp_new(TCG_TYPE_I64);
>
>  -    tcg_gen_ext_tl_i64(r_temp, src2);
>  -    tcg_gen_ext_tl_i64(r_temp2, src1);
>  +    tcg_gen_ext_i32_i64(r_temp, src2);
>  +    tcg_gen_ext_i32_i64(r_temp2, src1);
>
>      tcg_gen_mul_i64(r_temp2, r_temp, r_temp2);
>
>      tcg_gen_shri_i64(r_temp, r_temp2, 32);

Thanks, applied to both umul and smul.