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ARM: Add a bit to the ExtMachInst to select thumb mode.

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This commit is contained in:
Gabe Black 2010-06-02 12:58:00 -05:00
parent 4ddeceba96
commit a59d219989
2 changed files with 17 additions and 0 deletions
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1
src/arch/arm/predecoder.hh
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@ -73,6 +73,7 @@ namespace ArmISA
void moreBytes(Addr pc, Addr fetchPC, MachInst inst) void moreBytes(Addr pc, Addr fetchPC, MachInst inst)
{ {
emi = inst; emi = inst;
emi.thumb = (pc & (ULL(1) << PcTBitShift));
emi.sevenAndFour = bits(inst, 7) && bits(inst, 4); emi.sevenAndFour = bits(inst, 7) && bits(inst, 4);
emi.isMisc = (bits(inst, 24, 23) == 0x2 && bits(inst, 20) == 0); emi.isMisc = (bits(inst, 24, 23) == 0x2 && bits(inst, 20) == 0);
} }

16
src/arch/arm/types.hh
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@ -1,4 +1,16 @@
/* /*
* Copyright (c) 2010 ARM Limited
* 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.
*
* Copyright (c) 2007-2008 The Florida State University * Copyright (c) 2007-2008 The Florida State University
* All rights reserved. * All rights reserved.
* *
@ -39,6 +51,10 @@ namespace ArmISA
typedef uint32_t MachInst; typedef uint32_t MachInst;
BitUnion64(ExtMachInst) BitUnion64(ExtMachInst)
// Bitfields to select mode.
Bitfield<36> thumb;
Bitfield<35> bigThumb;
// Made up bitfields that make life easier. // Made up bitfields that make life easier.
Bitfield<33> sevenAndFour; Bitfield<33> sevenAndFour;
Bitfield<32> isMisc; Bitfield<32> isMisc;