search for: displac

Displaying 20 results from an estimated 226 matches for "displac".

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1999 Mar 26
0
anova problem:
...id dimnames given for data frame Any idea where it comes from? Many thanks. Here is the fit and the attempted anova: > fit Call: lm(formula = as.formula(paste(chemical, "a~", cmd, sep = "")), singular.ok = TRUE) Coefficients: (Intercept) Odom Displace Weight -1.440e+00 2.936e-02 9.276e-01 -2.619e+00 HC1b HC2b CO1b CO2 8.974e-01 -1.223e-01 -3.695e-01 2.484e-01 NOX2 R00001 R00010 R00011 2.738e-...
2015 Feb 18
2
[LLVMdev] How to specify displacement range of a target instruction to llc
Hi, I'm working on a project that use llvm openrisc beckend (currently not part of the upstream). Right now I'm looking at a bug where llc generates memory instructions that has out-of-range displacement, for example l.sb 37668(r1), r2 in which 37668 is a 17 bit signed integer, but the instruction only allows 16 bit signed displacement. As a result, after running through the assembler, 37668 is encoded wrongly into -27668 because it's being sign extended. Can someone point to me where...
2017 Feb 13
5
[PATCH v2] x86/paravirt: Don't make vcpu_is_preempted() a callee-save function
...ql %edi, %rax; > >> movq __per_cpu_offset(,%rax,8), %rax; > >> cmpb $0, %[offset](%rax); > >> setne %al; > >> > >> ? > > Yes, that looks good to me. > > > > Cheers, > > Longman > > > Sorry, I am going to take it back. The displacement or offset can only > be up to 32-bit. So we will still need to use at least one more > register, I think. I don't think that would be a problem, I very much doubt we declare more than 4G worth of per-cpu variables in the kernel. In any case, use "e" or "Z" as co...
2017 Feb 13
5
[PATCH v2] x86/paravirt: Don't make vcpu_is_preempted() a callee-save function
...ql %edi, %rax; > >> movq __per_cpu_offset(,%rax,8), %rax; > >> cmpb $0, %[offset](%rax); > >> setne %al; > >> > >> ? > > Yes, that looks good to me. > > > > Cheers, > > Longman > > > Sorry, I am going to take it back. The displacement or offset can only > be up to 32-bit. So we will still need to use at least one more > register, I think. I don't think that would be a problem, I very much doubt we declare more than 4G worth of per-cpu variables in the kernel. In any case, use "e" or "Z" as co...
2017 Oct 16
4
[Xen-devel] [PATCH 11/13] x86/paravirt: Add paravirt alternatives infrastructure
...yte 0xff >>> 3e: 14 c5 adc $0xc5,%al >>> >>> >>> so the original 'cli' was replaced with the pv call but to me the offset >>> looks a bit off, no? Shouldn't it always be positive? >> callq takes a 32bit signed displacement, so jumping back by up to 2G is >> perfectly legitimate. > Yes, but > > ostr at workbase> nm vmlinux | grep entry_SYSCALL_64_fastpath > ffffffff817365dd t entry_SYSCALL_64_fastpath > ostr at workbase> nm vmlinux | grep " pv_irq_ops" > ffffffff81c2dbc0 D...
2017 Oct 16
4
[Xen-devel] [PATCH 11/13] x86/paravirt: Add paravirt alternatives infrastructure
...yte 0xff >>> 3e: 14 c5 adc $0xc5,%al >>> >>> >>> so the original 'cli' was replaced with the pv call but to me the offset >>> looks a bit off, no? Shouldn't it always be positive? >> callq takes a 32bit signed displacement, so jumping back by up to 2G is >> perfectly legitimate. > Yes, but > > ostr at workbase> nm vmlinux | grep entry_SYSCALL_64_fastpath > ffffffff817365dd t entry_SYSCALL_64_fastpath > ostr at workbase> nm vmlinux | grep " pv_irq_ops" > ffffffff81c2dbc0 D...
2019 May 09
0
[Bug 1337] New: NETMAP feature, using a displaced mask fail.
https://bugzilla.netfilter.org/show_bug.cgi?id=1337 Bug ID: 1337 Summary: NETMAP feature, using a displaced mask fail. Product: iptables Version: unspecified Hardware: All OS: All Status: NEW Severity: normal Priority: P5 Component: iptables Assignee: netfilter-buglog at lists.netfilter.org Repo...
2019 May 21
0
[Bug 1339] New: NETMAP feature, using a displaced mask fail.
https://bugzilla.netfilter.org/show_bug.cgi?id=1339 Bug ID: 1339 Summary: NETMAP feature, using a displaced mask fail. Product: netfilter/iptables Version: unspecified Hardware: All OS: Debian GNU/Linux Status: NEW Severity: normal Priority: P5 Component: unknown Assignee: netfilter-buglog at list...
2017 Oct 17
1
[Xen-devel] [PATCH 11/13] x86/paravirt: Add paravirt alternatives infrastructure
...e: 14 c5 adc $0xc5,%al > >>> > >>> > >>> so the original 'cli' was replaced with the pv call but to me the offset > >>> looks a bit off, no? Shouldn't it always be positive? > >> callq takes a 32bit signed displacement, so jumping back by up to 2G is > >> perfectly legitimate. > > Yes, but > > > > ostr at workbase> nm vmlinux | grep entry_SYSCALL_64_fastpath > > ffffffff817365dd t entry_SYSCALL_64_fastpath > > ostr at workbase> nm vmlinux | grep " pv_irq_ops&...
2011 Sep 26
3
[LLVMdev] x86-64 large stack offsets
Hey guys, I'm working on a bug for x86-64 in LLVM 2.9. Well, it's actually two issues. The assembly generated for large stack offsets has an overflow; And, once the overflow is fixed, the displacement is too large for GNU ld to handle it. void fool( int long n ) { double w[268435600]; double z[268435600]; unsigned long i; for ( i = 0; i < n; i++ ) { w[i] = 1.0; z[i] = 2.0; } printf(" n: %lld, W %g Z %g\n", n, w[1], z[1] ); } Here's one of the offending...
2017 Jan 06
2
RFC: LLD range extension thunks
After looking at this for a while, I do not think that this problem is NP-hard. With a finite "short branch" displacement k, I was not able to come up with a gadget that could create global constraints as would be needed to e.g. model an instance of 3SAT or vertex cover in terms of this problem. The problem is hard though. I believe that it is likely to be exponential in the "short branch" displacement...
2017 May 18
3
Memory accesses and determining aliasing at the MI level
...s optimisation during post-RA scheduling, I want to be able to determine some properties about the memory access. If I have two registers referring to memory, how can I determine if they are derived from the same base-pointer? Often LLVM will optimise to use intermediate registers holding partial displacements, for example, when a 'struct' object is on the stack, the address of the start of that object might be computed as: R1 := SP + initialDisplacement; then the access to a member of that object may be accessed with a member offset from 'R1'. This can get more complicated w...
2011 Jun 19
2
windows displacement after changing screen resolution
Does anybody experienced that after exiting a program and when the screen resolution is back to normal, all windows are moved to first workspace?
2013 Jul 01
0
[Bug 65310] [regression] failure in building nvc0_vbo.lo: /tmp/cclDjdRp.s:1270: Error: missing or invalid displacement expression `-8589934576
https://bugs.freedesktop.org/show_bug.cgi?id=65310 Emil Velikov <emil.l.velikov at gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|dri-devel at lists.freedesktop |nouveau at lists.freedesktop.o |.org |rg
2013 Jul 01
0
[Bug 65310] [regression] failure in building nvc0_vbo.lo: /tmp/cclDjdRp.s:1270: Error: missing or invalid displacement expression `-8589934576
https://bugs.freedesktop.org/show_bug.cgi?id=65310 --- Comment #4 from Emil Velikov <emil.l.velikov at gmail.com> --- Cannot seem to reproduce $ export CFLAGS="-march=native -msse2 -mfpmath=sse -O3 -ffast-math -funroll-loops -fomit-frame-pointer -floop-interchange -floop-strip-mine -floop-block" export CXXFLAGS="$CFLAGS" # Build mesa with Gallium3D hardware
2013 Jul 01
0
[Bug 65310] [regression] failure in building nvc0_vbo.lo: /tmp/cclDjdRp.s:1270: Error: missing or invalid displacement expression `-8589934576
https://bugs.freedesktop.org/show_bug.cgi?id=65310 Emil Velikov <emil.l.velikov at gmail.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |NEEDINFO --- Comment #5 from Emil Velikov <emil.l.velikov at gmail.com> --- Using gcc
2013 Aug 25
0
[Bug 65310] [regression] failure in building nvc0_vbo.lo: /tmp/cclDjdRp.s:1270: Error: missing or invalid displacement expression `-8589934576
https://bugs.freedesktop.org/show_bug.cgi?id=65310 --- Comment #6 from Ilia Mirkin <imirkin at alum.mit.edu> --- Please provide repro steps. I'm inclined to believe this is a problem in the environment, and not a core gcc bug. But those are some trippy optimization flags, so who knows. Be sure to specify the platform you're building for (given the sse2 flag, x86 or
2013 Sep 26
0
[Bug 65310] [regression] failure in building nvc0_vbo.lo: /tmp/cclDjdRp.s:1270: Error: missing or invalid displacement expression `-8589934576
https://bugs.freedesktop.org/show_bug.cgi?id=65310 Ilia Mirkin <imirkin at alum.mit.edu> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEEDINFO |RESOLVED Resolution|--- |INVALID --- Comment #7 from Ilia Mirkin
2017 Jan 06
3
RFC: LLD range extension thunks
...west address jump needing a thunk to a particular target and put the thunk the maximum possible distance after it (after the end of a function, or even after any unconditional branch). Find everything else within range of that thunk and fix it up. Repeat. Other algorithms will give smaller average displacements to the thunks, but there is no advantage in that. No other algorithm will generate fewer thunks. That's assuming all short branches have the same code size and displacement distance. If there are multiple branch distances and code sizes (and you have a choice between them at given call...
2017 Oct 17
0
[Xen-devel] [PATCH 11/13] x86/paravirt: Add paravirt alternatives infrastructure
...; 3e: 14 c5 adc $0xc5,%al >>>> >>>> >>>> so the original 'cli' was replaced with the pv call but to me the offset >>>> looks a bit off, no? Shouldn't it always be positive? >>> callq takes a 32bit signed displacement, so jumping back by up to 2G is >>> perfectly legitimate. >> Yes, but >> >> ostr at workbase> nm vmlinux | grep entry_SYSCALL_64_fastpath >> ffffffff817365dd t entry_SYSCALL_64_fastpath >> ostr at workbase> nm vmlinux | grep " pv_irq_ops"...