From 399e095510ff6bc469c45b1e5afa96567d757004 Mon Sep 17 00:00:00 2001 From: Gabe Black Date: Sun, 13 Feb 2011 17:42:56 -0800 Subject: X86: On a bad microopc, return a microop that returns a fault that panics. This way a bad micropc will have to get all the way to commit before killing the simulation. This accounts for misspeculated branches. --- src/arch/x86/insts/badmicroop.cc | 55 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 src/arch/x86/insts/badmicroop.cc (limited to 'src/arch/x86/insts/badmicroop.cc') diff --git a/src/arch/x86/insts/badmicroop.cc b/src/arch/x86/insts/badmicroop.cc new file mode 100644 index 000000000..ef493f250 --- /dev/null +++ b/src/arch/x86/insts/badmicroop.cc @@ -0,0 +1,55 @@ +/* + * Copyright (c) 2011 Advanced Micro Devices + * All rights reserved. + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Authors: Gabe Black + */ + +#include "arch/x86/insts/badmicroop.hh" +#include "arch/x86/isa_traits.hh" +#include "arch/x86/decoder.hh" + +namespace X86ISA +{ + +// This microop needs to be allocated on the heap even though it could +// theoretically be statically allocated. The reference counted pointer would +// try to delete the static memory when it was destructed. +const StaticInstPtr badMicroop = + new X86ISAInst::MicroPanic(NoopMachInst, "BAD", + StaticInst::IsMicroop | StaticInst::IsLastMicroop, + "Invalid microop!", 0); + +} // namespace X86ISA -- cgit v1.2.3