Re: [Valgrind-users] Illegal instruction error in some versions of valgrind

[Steve E. <st...@ed...>]

Thanks.

On 25/02/26 1:43 am, Paul Floyd via Valgrind-users wrote:
>
> Hi
>
> On 24/02/2026 04:22, Steve Edmonds wrote:
>>
>> vex x86->IR: unhandled instruction bytes: 0x66 0xF 0x38 0x39
>>
> That ought to work
>
>    case 0x39:
>    case 0x3D:
>       /* 66 0F 38 39 /r = PMINSD xmm1, xmm2/m128
>          Minimum of Packed Signed Double Word Integers (XMM)
>          66 0F 38 3D /r = PMAXSD xmm1, xmm2/m128
>          Maximum of Packed Signed Double Word Integers (XMM)
>       */
>       if (have66noF2noF3(pfx) && sz == 2) {
>          /* FIXME: this needs an alignment check */
>          Bool isMAX = opc == 0x3D;
>          delta = dis_SSEint_E_to_G(
>                     vbi, pfx, delta,
>                     isMAX ? "pmaxsd" : "pminsd",
>                     isMAX ? Iop_Max32Sx4 : Iop_Min32Sx4,
>                     False
>                  );
>          goto decode_success;
>       }
>       break;
>
> It was also fairly recently added to x86 by Alexandra Hajkova. You 
> will need to build Valgrind from source or wait for version 3.27 for that.
>
> Would it be possible for me to build 'quasar'? Is it this 
> https://quasar.dev/start/quasar-cli/ ?
>
This is the quasar (https://quasaraccounting.com/) and I have an old 
non-deb version with decades of data.
I might look at building Valgrind and see what happens.
Steve