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From: Mark W. <ma...@kl...> - 2019-08-06 16:54:33
|
Hi, On Tue, 2019-08-06 at 11:54 +0200, Mark Wielaard wrote: > Sorry, this is a bit old, but I am finally testing this and on a z13 > setup (no z14) this part causes trouble [...] We discussed this a bit on irc and it seems I got confused a bit by the precise s390x facilities available on the machine I am using (which is a remote build machine to which I don't have direct access). The issue doesn't seem to be with this patch. But with the specific setup of the machine, it is a RHEL7 based setup, where it seems the kernel doesn't setup the vector capability, but the machine does have the vx facility. That seems to cause our tests prereq to think it can run the vector instructions, but when the actual vector* tests run the instructions fail because the kernel hasn't enabled them. So it seems we need to make tests/s390x_features s390x-vx smarter. Cheers, Mark |
|
From: Mark W. <ma...@kl...> - 2019-08-06 09:54:38
|
Hi, On Wed, 2019-06-12 at 18:24 +0000, Andreas Arnez wrote: > https://sourceware.org/git/gitweb.cgi?p=valgrind.git;h=50b20aa244c1fddd9b9e872526d4daad49ddd7a5 > > commit 50b20aa244c1fddd9b9e872526d4daad49ddd7a5 > Author: Ilya Leoshkevich <ii...@li...> > Date: Thu May 16 12:34:37 2019 +0200 > > Bug 404406 - s390x: implement z14 miscellaneous instructions > > (from bug 404406 comment 0): > Valgrind on s390x currently lacks support for the miscellaneous > instruction extensions facility 2. > > Signed-off-by: Ilya Leoshkevich <ii...@li...> Sorry, this is a bit old, but I am finally testing this and on a z13 setup (no z14) this part causes trouble: > diff --git a/VEX/priv/host_s390_isel.c b/VEX/priv/host_s390_isel.c > index 9141b7b..30e5c76 100644 > --- a/VEX/priv/host_s390_isel.c > +++ b/VEX/priv/host_s390_isel.c > @@ -1018,6 +1018,8 @@ s390_isel_int128_expr_wrk(HReg *dst_hi, HReg *dst_lo, ISelEnv *env, > goto do_multiply64; > > case Iop_MullS64: > + if (!(env->hwcaps & VEX_HWCAPS_S390X_MI2)) > + goto irreducible; > is_signed_multiply = True; > goto do_multiply64; > > @@ -1125,7 +1127,10 @@ s390_isel_int128_expr_wrk(HReg *dst_hi, HReg *dst_lo, ISelEnv *env, > } > } > > - vpanic("s390_isel_int128_expr"); > + /* We get here if no pattern matched. */ > + irreducible: > + ppIRExpr(expr); > + vpanic("s390_isel_int128_expr: cannot reduce tree"); > } This seems to be a new restriction for Iop_MullS64, which seems to reduce fine before. With this the following testcases start failing on z13: none/tests/s390x/vector (stdout) none/tests/s390x/vector (stderr) none/tests/s390x/vector_float (stdout) none/tests/s390x/vector_float (stderr) none/tests/s390x/vector_integer (stdout) none/tests/s390x/vector_integer (stderr) none/tests/s390x/vector_string (stdout) none/tests/s390x/vector_string (stderr) Removing that hunk makes them pass again. Is this really necessary for z14? If so, that check is probably in the wrong place or testing the wrong facility. Thanks, Mark |