sparc: Get rid of some register type definitions.

These are IntReg, FloatReg, FloatRegBits, and MiscReg. These have been
supplanted by the global types RegVal and FloatRegVal.

Change-Id: I956abfc7b439b083403e1a0d01e0bb35020bde44
Reviewed-on: https://gem5-review.googlesource.com/c/13627
Maintainer: Gabe Black <gabeblack@google.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>

arm,sparc,x86,base,cpu,sim: Replace the Twin(32|64)_t types with.

Replace them with std::array<>s.

Change-Id: I76624c87a1cd9b21c386a96147a18de92b8a8a34
Reviewed-on: https://gem5-review.googlesource.com/6602
Maintainer: Gabe Black <gabeblack@google.com>
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>

sparc: Pull most of the Nop format out of the ISA description.

The Nop format mostly just made instructions that inherited from the
Nop base class but with different mnemonics, so there doesn't need
to be very much dynamic content.

Change-Id: I1cf5e25ca8372f9b71f56d49756879c7545c9f6c
Reviewed-on: https://gem5-review.googlesource.com/5462
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

sparc: Pull flat static instruction classes out of the ISA.

These classes are just used as base classes for other instructions
and don't need to be part of the ISA definition. Pull them into
standard C++ files.

Change-Id: If3e0bd82b1e676f20459bc0293fbda49de66b554
Reviewed-on: https://gem5-review.googlesource.com/5422
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

scons: Enable -Wextra by default

Make best use of the compiler, and enable -Wextra as well as
-Wall. There are a few issues that had to be resolved, but they are
all trivial.

arch: Use shared_ptr for all Faults

This patch takes quite a large step in transitioning from the ad-hoc
RefCountingPtr to the c++11 shared_ptr by adopting its use for all
Faults. There are no changes in behaviour, and the code modifications
are mostly just replacing "new" with "make_shared".

clang/gcc: Fix compilation issues with clang 3.0 and gcc 4.6

This patch addresses a number of minor issues that cause problems when
compiling with clang >= 3.0 and gcc >= 4.6. Most importantly, it
avoids using the deprecated ext/hash_map and instead uses
unordered_map (and similarly so for the hash_set). To make use of the
new STL containers, g++ and clang has to be invoked with "-std=c++0x",
and this is now added for all gcc versions >= 4.6, and for clang >=
3.0. For gcc >= 4.3 and <= 4.5 and clang <= 3.0 we use the tr1
unordered_map to avoid the deprecation warning.

The addition of c++0x in turn causes a few problems, as the
compiler is more stringent and adds a number of new warnings. Below,
the most important issues are enumerated:

1) the use of namespaces is more strict, e.g. for isnan, and all
headers opening the entire namespace std are now fixed.

2) another other issue caused by the more stringent compiler is the
narrowing of the embedded python, which used to be a char array,
and is now unsigned char since there were values larger than 128.

3) a particularly odd issue that arose with the new c++0x behaviour is
found in range.hh, where the operator< causes gcc to complain about
the template type parsing (the "<" is interpreted as the beginning
of a template argument), and the problem seems to be related to the
begin/end members introduced for the range-type iteration, which is
a new feature in c++11.

As a minor update, this patch also fixes the build flags for the clang
debug target that used to be shared with gcc and incorrectly use
"-ggdb".

SPARC: Make PSTATE and HPSTATE a BitUnion.

This gets rid of cryptic bits of code with lots of bit manipulation, and makes
some comments redundant.

ISA parser: Use '_' instead of '.' to delimit type modifiers on operands.

By using an underscore, the "." is still available and can unambiguously be
used to refer to members of a structure if an operand is a structure, class,
etc. This change mostly just replaces the appropriate "."s with "_"s, but
there were also a few places where the ISA descriptions where handling the
extensions themselves and had their own regular expressions to update. The
regular expressions in the isa parser were updated as well. It also now
looks for one of the defined type extensions specifically after connecting "_"
where before it would look for any sequence of characters after a "."
following an operand name and try to use it as the extension. This helps to
disambiguate cases where a "_" may legitimately be part of an operand name but
not separate the name from the type suffix.

Because leaving the "_" and suffix on the variable name still leaves a valid
C++ identifier and all extensions need to be consistent in a given context, I
considered leaving them on as a breadcrumb that would show what the intended
type was for that operand. Unfortunately the operands can be referred to in
code templates, the Mem operand in particular, and since the exact type of Mem
can be different for different uses of the same template, that broke things.

PseudoInst: Remove the now unnecessary #if FULL_SYSTEMs around pseudoinsts.

ISAs: Streamline some spots where Mem is used in the ISA descriptions.

sparc: compilation fixes for inorder
Add a few constants and functions that the InOrder model wants for SPARC.
* * *
sparc: add eaComp function
InOrder separates the address generation from the actual access so give
Sparc that functionality
* * *
sparc: add control flags for branches
branch predictors and other cpu model functions need to know specific information
about branches, so add the necessary flags here

SPARC: Adjust the "call" instruction so R15 doesn't get marked as a source.

SPARC: Take advantage of new PCState syntax.

O3: Support squashing all state after special instruction

For SPARC ASIs are added to the ExtMachInst. If the ASI is changed simply
marking the instruction as Serializing isn't enough beacuse that only
stops rename. This provides a mechanism to squash all the instructions
and refetch them

SPARC: Clean up some historical style issues.

ISA,CPU,etc: Create an ISA defined PC type that abstracts out ISA behaviors.



This change is a low level and pervasive reorganization of how PCs are managed
in M5. Back when Alpha was the only ISA, there were only 2 PCs to worry about,
the PC and the NPC, and the lsb of the PC signaled whether or not you were in
PAL mode. As other ISAs were added, we had to add an NNPC, micro PC and next
micropc, x86 and ARM introduced variable length instruction sets, and ARM
started to keep track of mode bits in the PC. Each CPU model handled PCs in
its own custom way that needed to be updated individually to handle the new
dimensions of variability, or, in the case of ARMs mode-bit-in-the-pc hack,
the complexity could be hidden in the ISA at the ISA implementation's expense.
Areas like the branch predictor hadn't been updated to handle branch delay
slots or micropcs, and it turns out that had introduced a significant (10s of
percent) performance bug in SPARC and to a lesser extend MIPS. Rather than
perpetuate the problem by reworking O3 again to handle the PC features needed
by x86, this change was introduced to rework PC handling in a more modular,
transparent, and hopefully efficient way.


PC type:

Rather than having the superset of all possible elements of PC state declared
in each of the CPU models, each ISA defines its own PCState type which has
exactly the elements it needs. A cross product of canned PCState classes are
defined in the new "generic" ISA directory for ISAs with/without delay slots
and microcode. These are either typedef-ed or subclassed by each ISA. To read
or write this structure through a *Context, you use the new pcState() accessor
which reads or writes depending on whether it has an argument. If you just
want the address of the current or next instruction or the current micro PC,
you can get those through read-only accessors on either the PCState type or
the *Contexts. These are instAddr(), nextInstAddr(), and microPC(). Note the
move away from readPC. That name is ambiguous since it's not clear whether or
not it should be the actual address to fetch from, or if it should have extra
bits in it like the PAL mode bit. Each class is free to define its own
functions to get at whatever values it needs however it needs to to be used in
ISA specific code. Eventually Alpha's PAL mode bit could be moved out of the
PC and into a separate field like ARM.

These types can be reset to a particular pc (where npc = pc +
sizeof(MachInst), nnpc = npc + sizeof(MachInst), upc = 0, nupc = 1 as
appropriate), printed, serialized, and compared. There is a branching()
function which encapsulates code in the CPU models that checked if an
instruction branched or not. Exactly what that means in the context of branch
delay slots which can skip an instruction when not taken is ambiguous, and
ideally this function and its uses can be eliminated. PCStates also generally
know how to advance themselves in various ways depending on if they point at
an instruction, a microop, or the last microop of a macroop. More on that
later.

Ideally, accessing all the PCs at once when setting them will improve
performance of M5 even though more data needs to be moved around. This is
because often all the PCs need to be manipulated together, and by getting them
all at once you avoid multiple function calls. Also, the PCs of a particular
thread will have spatial locality in the cache. Previously they were grouped
by element in arrays which spread out accesses.


Advancing the PC:

The PCs were previously managed entirely by the CPU which had to know about PC
semantics, try to figure out which dimension to increment the PC in, what to
set NPC/NNPC, etc. These decisions are best left to the ISA in conjunction
with the PC type itself. Because most of the information about how to
increment the PC (mainly what type of instruction it refers to) is contained
in the instruction object, a new advancePC virtual function was added to the
StaticInst class. Subclasses provide an implementation that moves around the
right element of the PC with a minimal amount of decision making. In ISAs like
Alpha, the instructions always simply assign NPC to PC without having to worry
about micropcs, nnpcs, etc. The added cost of a virtual function call should
be outweighed by not having to figure out as much about what to do with the
PCs and mucking around with the extra elements.

One drawback of making the StaticInsts advance the PC is that you have to
actually have one to advance the PC. This would, superficially, seem to
require decoding an instruction before fetch could advance. This is, as far as
I can tell, realistic. fetch would advance through memory addresses, not PCs,
perhaps predicting new memory addresses using existing ones. More
sophisticated decisions about control flow would be made later on, after the
instruction was decoded, and handed back to fetch. If branching needs to
happen, some amount of decoding needs to happen to see that it's a branch,
what the target is, etc. This could get a little more complicated if that gets
done by the predecoder, but I'm choosing to ignore that for now.


Variable length instructions:

To handle variable length instructions in x86 and ARM, the predecoder now
takes in the current PC by reference to the getExtMachInst function. It can
modify the PC however it needs to (by setting NPC to be the PC + instruction
length, for instance). This could be improved since the CPU doesn't know if
the PC was modified and always has to write it back.


ISA parser:

To support the new API, all PC related operand types were removed from the
parser and replaced with a PCState type. There are two warts on this
implementation. First, as with all the other operand types, the PCState still
has to have a valid operand type even though it doesn't use it. Second, using
syntax like PCS.npc(target) doesn't work for two reasons, this looks like the
syntax for operand type overriding, and the parser can't figure out if you're
reading or writing. Instructions that use the PCS operand (which I've
consistently called it) need to first read it into a local variable,
manipulate it, and then write it back out.


Return address stack:

The return address stack needed a little extra help because, in the presence
of branch delay slots, it has to merge together elements of the return PC and
the call PC. To handle that, a buildRetPC utility function was added. There
are basically only two versions in all the ISAs, but it didn't seem short
enough to put into the generic ISA directory. Also, the branch predictor code
in O3 and InOrder were adjusted so that they always store the PC of the actual
call instruction in the RAS, not the next PC. If the call instruction is a
microop, the next PC refers to the next microop in the same macroop which is
probably not desirable. The buildRetPC function advances the PC intelligently
to the next macroop (in an ISA specific way) so that that case works.


Change in stats:

There were no change in stats except in MIPS and SPARC in the O3 model. MIPS
runs in about 9% fewer ticks. SPARC runs with 30%-50% fewer ticks, which could
likely be improved further by setting call/return instruction flags and taking
advantage of the RAS.


TODO:

Add != operators to the PCState classes, defined trivially to be !(a==b).
Smooth out places where PCs are split apart, passed around, and put back
together later. I think this might happen in SPARC's fault code. Add ISA
specific constructors that allow setting PC elements without calling a bunch
of accessors. Try to eliminate the need for the branching() function. Factor
out Alpha's PAL mode pc bit into a separate flag field, and eliminate places
where it's blindly masked out or tested in the PC.

SPARC: Implement the version of movcc that uses the fp condition codes.

SPARC: Make resTemp in udivcc wide enough to hold all the bits we need.

SPARC: Adjust a few instructions to not write registers in initiateAcc.

SPARC: Remove parameter that was only ever set to one value.

SPARC: Remove some redundant code from some of the fp instructions.

SPARC: Clean up of privileged instructions.

SPARC: Long overdue cleanup of the condition code handlers.

SPARC: Clean up the branch instructions a bit.

Add a flag to indicate an instruction triggers a syscall in SE mode.

The syntax used for twin stores was confusing the parser so it's now broken down farther.

Fix mulscc.

Fix the mnemonic and the branch displacement field size of the branch on floating point condition codes with prediction.

Make sttw and sttwa use the twin memory operations.

Added implementations of the fpop2 instructions.

implement ipi stufff for SPARC

src/arch/alpha/utility.hh:
src/arch/mips/utility.hh:
src/arch/sparc/utility.hh:
src/arch/x86/utility.hh:
add hook for system to startup the cpu or not... in the case of FS sparc, only the first cpu would get spunup.. the rest sit in an idle state until they get an ipi
src/arch/sparc/isa/decoder.isa:
handle writable bits of strandstatus register in miscregfile
src/arch/sparc/miscregfile.hh:
some constants for the strand status register
src/arch/sparc/ua2005.cc:
properly implement the strand status register
src/dev/sparc/iob.cc:
implement ipi generation properly
src/sim/system.cc:
call into the ISA to start the CPU (or not)

make ldtw(a) -- Twin 32 bit load work correctly -- by doing it the same way as the twin 64 bit loads

src/arch/isa_parser.py:
src/arch/sparc/isa/decoder.isa:
src/arch/sparc/isa/operands.isa:
src/base/bigint.hh:
src/cpu/simple/atomic.cc:
src/cpu/simple/timing.cc:
src/mem/packet_access.hh:
make ldtw(a) Twin 32 bit load work correctly

Make the m5 psuedo instructions use the BasicOperate format

Merge zizzer.eecs.umich.edu:/bk/newmem
into ahchoo.blinky.homelinux.org:/home/gblack/m5/newmem-sparc32

Make trap instructions always generate TrapInstruction Fault objects which call into the Process object to handle system calls. Refactored the Process objects, and move the handler code into it's own file, and add some syscalls which are used in a natively compiled hello world. Software traps with trap number 3 (not syscall number 3) are supposed to cause the register windows to be flushed but are ignored right now. Finally, made uname for SPARC report a 2.6.12 kernel which is what m22-018.pool happens to be running.

Ali and I both made the same change and we only need it once. I liked mine a little better.

Merge zizzer.eecs.umich.edu:/bk/newmem
into ahchoo.blinky.homelinux.org:/home/gblack/m5/newmem-sparc32

Merge zizzer:/bk/newmem
into zeep.pool:/z/saidi/work/m5.newmem

fix se compiling oops

make m5 readfile work on solaris... we can have a solaris regression soon!

src/arch/sparc/isa/decoder.isa:
add readfile and break to sparc decoder
src/arch/sparc/isa/operands.isa:
fix O0-O5 operands registers
util/m5/Makefile.sparc:
Make sparc makefile compile a 64bit binary
util/m5/m5.c:
readfile was in here twice, once will be sufficient I think
util/m5/m5op_sparc.S:
implement readfile and debugbreak

Make the m5 pseudo instructions only work in FS. Also, make sure any undefined opcodes in impdep2 (which in SE is all of them) trap with an illegal_instruction exception.

add pseduo instruction support for sparc

util/m5/Makefile.alpha:
Clean up to make it a bit easier to muck with
util/m5/Makefile.alpha:
Make the makefile more reasonable
util/m5/Makefile.alpha:
Remove authors from copyright.
util/m5/Makefile.alpha:
Updated Authors from bk prs info
util/m5/Makefile.alpha:
bk cp Makefile Makefile.alpha
src/arch/sparc/tlb.cc:
Clean up the cache code a little bit and make sure the uncacbale bit is set when appropriate
src/arch/alpha/isa/decoder.isa:
src/sim/pseudo_inst.cc:
src/sim/pseudo_inst.hh:
Rename AlphaPseudo -> PseudoInst since it's all generic
src/arch/sparc/isa/bitfields.isa:
src/arch/sparc/isa/decoder.isa:
src/arch/sparc/isa/includes.isa:
src/arch/sparc/isa/operands.isa:
Add support for pseudo instructions in sparc
util/m5/Makefile.alpha:
util/m5/Makefile.sparc:
split off alpha make file and sparc make file for m5 app
util/m5/m5.c:
ivle and ivlb aren't used anymore
util/m5/m5op.h:
stdint seems like a more generic better fit here
util/m5/m5op_alpha.S:
move the op ids into their own header file since we can share them between sparc and alpha

rename store conditional stuff as extra data so it can be used for conditional swaps as well
Add support for a twin 64 bit int load
Add Memory barrier and write barrier flags as appropriate
Make atomic memory ops atomic

src/arch/alpha/isa/mem.isa:
src/arch/alpha/locked_mem.hh:
src/cpu/base_dyn_inst.hh:
src/mem/cache/cache_blk.hh:
src/mem/cache/cache_impl.hh:
rename store conditional stuff as extra data so it can be used for conditional swaps as well
src/arch/alpha/types.hh:
src/arch/mips/types.hh:
src/arch/sparc/types.hh:
add a largest read data type for statically allocating read buffers in atomic simple cpu
src/arch/isa_parser.py:
Add support for a twin 64 bit int load
src/arch/sparc/isa/decoder.isa:
Make atomic memory ops atomic
Add Memory barrier and write barrier flags as appropriate
src/arch/sparc/isa/formats/mem/basicmem.isa:
add post access code block and define a twinload format for twin loads
src/arch/sparc/isa/formats/mem/blockmem.isa:
remove old microcoded twin load coad
src/arch/sparc/isa/formats/mem/mem.isa:
swap.isa replaces the code in loadstore.isa
src/arch/sparc/isa/formats/mem/util.isa:
add a post access code block
src/arch/sparc/isa/includes.isa:
need bigint.hh for Twin64_t
src/arch/sparc/isa/operands.isa:
add a twin 64 int type
src/cpu/simple/atomic.cc:
src/cpu/simple/atomic.hh:
src/cpu/simple/base.hh:
src/cpu/simple/timing.cc:
add support for twinloads
add support for swap and conditional swap instructions
rename store conditional stuff as extra data so it can be used for conditional swaps as well
src/mem/packet.cc:
src/mem/packet.hh:
Add support for atomic swap memory commands
src/mem/packet_access.hh:
Add endian conversion function for Twin64_t type
src/mem/physical.cc:
src/mem/physical.hh:
src/mem/request.hh:
Add support for atomic swap memory commands
Rename sc code to extradata

more fp fixes
fix unaligned accesses in mmaped disk device

src/arch/sparc/isa/decoder.isa:
get (ld|st)fsr ops working right. In reality the fp enable check needs to go higher up in the emitted code
src/arch/sparc/isa/formats/basic.isa:
move the cexec into the aexec field
src/cpu/exetrace.cc:
copy the exception state from legion when we get it wrong. We aren't going to get it right without an fp emulation layer
src/dev/sparc/mm_disk.cc:
src/dev/sparc/mm_disk.hh:
fix unaligned accesses in the memory mapped disk device

more sparc fixes

src/arch/sparc/isa/decoder.isa:
fix rdgsr fault check
src/arch/sparc/tlb.cc:
block asis are now supported

fix mostly floating point related

src/arch/sparc/floatregfile.cc:
fix fp read/writing to registers... looking for suggestions on cleaner ways if anyone has them
src/arch/sparc/isa/decoder.isa:
fix some fp implementations
src/arch/sparc/isa/formats/basic.isa:
add new fp op class that 0 cexec in fsr and sets rounding mode for the up comming op
src/arch/sparc/isa/includes.isa:
include the appropriate header files for the rounding code
src/arch/sparc/miscregfile.cc:
print fsr out when it's read/written and the Sparc traceflgas in on
src/cpu/exetrace.cc:
fix printing of float registers

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

Implemented fbfss and fbpfcc instructions, and cleaned up branch code a little.

src/arch/sparc/isa/base.isa:
Added passesFpCondition function to help with fbfcc and fbpfcc instructions.
src/arch/sparc/isa/decoder.isa:
Added fbfcc and fbpfcc instructions, and cleaned up branch code slightly.
src/arch/sparc/isa/formats/branch.isa:
Minor cleanup.

change std::isnan() to a using namespace std and isnan(). We need a better way to do this.

use std:: for isnan() and fix decoding of fcmpe*

Added FpUnimpl format for quad precision and other purposefully unimplemented floating point ops.

Add implementation for the fcmp instructions. These don't behave -quite- right with respect to quite NaNs, but hopefully we don't need to worry about the distinction.

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

src/arch/sparc/isa/formats/mem/util.isa:
src/arch/sparc/isa_traits.hh:
src/arch/sparc/system.cc:
Hand Merge

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

Merge zizzer.eecs.umich.edu:/bk/newmem
into ewok.(none):/home/gblack/m5/newmemo3

src/sim/byteswap.hh:
Hand Merge

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

src/arch/sparc/isa/formats/mem/blockmem.isa:
src/arch/sparc/isa/operands.isa:
Hand Merge

Merge zizzer:/bk/newmem
into zower.eecs.umich.edu:/eecshome/m5/newmem

src/arch/isa_parser.py:
src/arch/sparc/isa/formats/mem/basicmem.isa:
src/arch/sparc/isa/formats/mem/blockmem.isa:
src/arch/sparc/isa/formats/mem/util.isa:
src/arch/sparc/miscregfile.cc:
src/arch/sparc/miscregfile.hh:
src/cpu/o3/iew_impl.hh:
Hand Merge

make unimplemented ops fail
return correct traps for ua2005 fpops that aren't implemented in hw

Merge zizzer:/bk/newmem
into zeep.pool:/z/saidi/work/m5.newmem

Make Sparc traceflag even more chatty
some fixes to fp instructions to use the single precision registers
if this is an fp op emit fp check code
add fpregs to m5legion struct

src/arch/sparc/floatregfile.cc:
Make Sparc traceflag even more chatty
src/arch/sparc/isa/base.isa:
add code to check if the fpu is enabled
src/arch/sparc/isa/decoder.isa:
some fixes to fp instructions to use the single precision registers
fix smul again
fix subc/subcc/subccc condition code setting
src/arch/sparc/isa/formats/basic.isa:
src/arch/sparc/isa/formats/mem/util.isa:
if this is an fp op emit fp check code
src/cpu/exetrace.cc:
check fp regs as well as int regs
src/cpu/m5legion_interface.h:
add fpregs to m5legion struct

Merge zeep.pool:/z/saidi/work/m5.newmem
into zeep.pool:/z/saidi/work/m5.suncc

fix smul and sdiv to sign extend, and handle overflow/underflow corretly
Only allow writing/reading of 32 bits of Y
Only allow writing/reading 32 bits of pc when pstate.am
Put any loaded data on the first half of a micro-op in uReg0 so it can't
overwrite the register we are using for address calculation
only erase a entry from the lookup table if it's valid
Put in a temporary check to make sure that lookup table and tlb array stay in sync
if we are interrupted in the middle of a mico-op, reset the micropc/nexpc
so we start on the first part of it when we come back

src/arch/sparc/isa/decoder.isa:
fix smul and sdiv to sign extend, and handle overflow/underflow corretly
Only allow writing/reading of 32 bits of Y
Only allow writing/reading 32 bits of pc when pstate.am
Put any loaded data on the first half of a micro-op in uReg0 so it can't
overwrite the register we are using for address calculation
src/arch/sparc/isa/formats/mem/blockmem.isa:
Put any loaded data on the first half of a micro-op in uReg0 so it can't
overwrite the register we are using for address calculation
src/arch/sparc/isa/includes.isa:
Use limits for 32bit underflow/overflow detection
src/arch/sparc/tlb.cc:
only erase a entry from the lookup table if it's valid
Put in a temporary check to make sure that lookup table and tlb array stay in sync
src/arch/sparc/tlb_map.hh:
add a print function to dump the tlb lookup table
src/cpu/simple/base.cc:
if we are interrupted in the middle of a mico-op, reset the micropc/nexpc
so we start on the first part of it when we come back

use pstate.am to mask off PC/NPC where it needs to +be
check writability of tlb cache entry before using
update tagaccess in places I forgot to
move the tlb privileged test up since it is higher priority

src/arch/sparc/faults.cc:
save only 32 bits of PC/NPC if Pstate.am is set
src/arch/sparc/isa/decoder.isa:
return only 32 bits of PC/NPC if Pstate.am is set
increment cleanwin correctly
src/arch/sparc/tlb.cc:
check writability of cache entry
update tagaccess in a few more places
move the privileged test up since it is higher priority
src/cpu/exetrace.cc:
mask off upper bits of pc if pstate.am is set before comparing to legion

clean up fault code a little bit
simplify and make complete some asi checks
implement all the twin asis and remove panic checks on their use
soft int is supported, so we don't need to print writes to it

src/arch/sparc/asi.cc:
make AsiIsLittle() be all the little asis.
Speed up AsiIsTwin() a bit
src/arch/sparc/faults.cc:
clean up the do*Fault code.... Make it work like legion, in particular
pstate.priv is left alone, not set to 0 like the spec says
src/arch/sparc/isa/decoder.isa:
implement some more twin ASIs
src/arch/sparc/tlb.cc:
All the twin asis are implemented, no need to say their not supported anymore
src/arch/sparc/ua2005.cc:
softint is supported now, no more need to

make our code a little more standards compliant
pretty close to compiling w/ suns compiler

briefly:
add dummy return after panic()/fatal()
split out flags by compiler vendor
include cstring and cmath where appropriate
use std namespace for string ops

SConstruct:
Add code to detect compiler and choose cflags based on detected compiler
Fix zlib check to work with suncc
src/SConscript:
split out flags by compiler vendor
src/arch/sparc/isa/decoder.isa:
use correct namespace for sqrt
src/arch/sparc/isa/formats/basic.isa:
add dummy return around panic
src/arch/sparc/isa/formats/integerop.isa:
use correct namespace for stringops
src/arch/sparc/isa/includes.isa:
include cstring and cmath where appropriate
src/arch/sparc/isa_traits.hh:
remove dangling comma
src/arch/sparc/system.cc:
dummy return to make sun cc front end happy
src/arch/sparc/tlb.cc:
src/base/compression/lzss_compression.cc:
use std namespace for string ops
src/arch/sparc/utility.hh:
no reason to say something is unsigned unsigned int
src/base/compression/null_compression.hh:
dummy returns to for suncc front end
src/base/cprintf.hh:
use standard variadic argument syntax instead of gnuc specefic renaming
src/base/hashmap.hh:
don't need to define hash for suncc
src/base/hostinfo.cc:
need stdio.h for sprintf
src/base/loader/object_file.cc:
munmap is in std namespace not null
src/base/misc.hh:
use M5 generic noreturn macros
use standard variadic macro __VA_ARGS__
src/base/pollevent.cc:
we need file.h for file flags
src/base/random.cc:
mess with include files to make suncc happy
src/base/remote_gdb.cc:
malloc memory for function instead of having a non-constant in an array size
src/base/statistics.hh:
use std namespace for floor
src/base/stats/text.cc:
include math.h for rint (cmath won't work)
src/base/time.cc:
use suncc version of ctime_r
src/base/time.hh:
change macro to work with both gcc and suncc
src/base/timebuf.hh:
include cstring from memset and use std::
src/base/trace.hh:
change variadic macros to be normal format
src/cpu/SConscript:
add dummy returns where appropriate
src/cpu/activity.cc:
include cstring for memset
src/cpu/exetrace.hh:
include cstring fro memcpy
src/cpu/simple/base.hh:
add dummy return for panic
src/dev/baddev.cc:
src/dev/pciconfigall.cc:
src/dev/platform.cc:
src/dev/sparc/t1000.cc:
add dummy return where appropriate
src/dev/ide_atareg.h:
make define work for both gnuc and suncc
src/dev/io_device.hh:
add dummy returns where approirate
src/dev/pcidev.hh:
src/mem/cache/cache_impl.hh:
src/mem/cache/miss/blocking_buffer.cc:
src/mem/cache/tags/lru.hh:
src/mem/cache/tags/split.hh:
src/mem/cache/tags/split_lifo.hh:
src/mem/cache/tags/split_lru.hh:
src/mem/dram.cc:
src/mem/packet.cc:
src/mem/port.cc:
include cstring for string ops
src/dev/sparc/mm_disk.cc:
add dummy return where appropriate
include cstring for string ops
src/mem/cache/miss/blocking_buffer.hh:
src/mem/port.hh:
Add dummy return where appropriate
src/mem/cache/tags/iic.cc:
cast hastSets to double for log() call
src/mem/physical.cc:
cast pmemAddr to char* for munmap
src/sim/byteswap.hh:
make define work for suncc and gnuc

fix flushw implementation

Spill and Fill handlers are actually n*4 + the start address

Modify ISA and staticInst to support a IsFirstMicroOp flag
Increment instruction count on first micro-op instead of last

src/arch/sparc/isa/decoder.isa:
Implement a twin load for ASI_LDTX_P(0xe2)
src/arch/sparc/isa/formats/mem/blockmem.isa:
set the new flag IsFirstMicroOp when needed
src/cpu/simple/atomic.cc:
Increment instruction count on first micro-op instead of last (because if we take a fault on a micro coded instruction it should be counted twice acording to legion)
src/cpu/static_inst.hh:
Add IsFirstMicroop flag to static insts

bug fixes to get us to 145m instructions

src/arch/sparc/intregfile.cc:
some checks to make sure that the cwp and global register flattening stuff is working. These things have caught a couple of bugs so I think it would be good to keep them around at least for now
src/arch/sparc/isa/decoder.isa:
fix smul instruction to write Y correctly
src/arch/sparc/miscregfile.cc:
legion always returns du and dl set, so we need to emulate that for now at least

move the twinx loads to the correct opcode and add asis 0x24 and 0x27
Make the TLB ok to translate QUAD_LDD

src/arch/sparc/isa/decoder.isa:
move the twinx loads to the correct opcode.
src/arch/sparc/tlb.cc:
Make QUAD_LDD asi ok to execute

Added in the extended twin load format

src/arch/sparc/isa/decoder.isa:
Added the extended twin load instructions
src/arch/sparc/isa/formats/mem/blockmem.isa:
Added stuff to implement the extended twin loads. This created alot of duplication which I'll deal with later.

Support for twin loads.

src/arch/sparc/isa/decoder.isa:
Changed the names of the twin loads to match the 2005 spec. They still use the old format though.
src/arch/sparc/isa/formats/mem/blockmem.isa:
Added code to generate twin loads
src/arch/sparc/isa/formats/mem/util.isa:
Added an alignment check for twin loads
src/arch/sparc/isa/operands.isa:
Comment explaining twin load operands.

Allocate the correct number of global registers
Fix fault formating and code for traps
fix a couple of bugs in the decoder
Cleanup/fix page table entry code
Implement more mmaped iprs, fix numbered tlb insertion code, add function to dump tlb contents
Don't panic if we differ from legion on a tcc instruction because of where legion prints its data and where we print our data

src/arch/sparc/faults.cc:
Fix fault formating and code for traps
src/arch/sparc/intregfile.hh:
allocate the correct number of global registers
src/arch/sparc/isa/decoder.isa:
fix a couple of bugs in the decoder: wrasi should write asi not ccr, done/retry should get hpstate from htstate
src/arch/sparc/pagetable.hh:
cleanup/fix page table code
src/arch/sparc/tlb.cc:
implement more mmaped iprs, fix numbered insertion code, add function to dump tlb contents
src/arch/sparc/tlb.hh:
add functions to write TagAccess register on tlb miss and to dump all tlb entries for debugging
src/cpu/exetrace.cc:
dump tlb entries on error, don't consider differences the cycle we take a trap to be bad.

get legion/m5 to first tlb miss fault

src/arch/sparc/asi.cc:
src/arch/sparc/asi.hh:
add sparc error asi
src/arch/sparc/faults.cc:
put a panic in if TL == MaxTL
src/arch/sparc/isa/decoder.isa:
Hpstate needs to be updated on a done too
src/arch/sparc/miscregfile.cc:
warn istead of panicing of fprs/fsr accesses
src/arch/sparc/tlb.cc:
add sparc error register code that just does nothing
fix a couple of other tlb bugs
src/arch/sparc/ua2005.cc:
fix implementation of HPSTATE write
src/cpu/exetrace.cc:
let exectrate mess up a couple of times before dying
src/python/m5/objects/T1000.py:
add l2 error status register fake devices

Many more fixes for SPARC_FS. Gets us to the point where SOFTINT starts
getting touched.

configs/common/FSConfig.py:
Physical memory on the T1 starts at 1MB, The first megabyte is unmapped to catch bugs
src/arch/isa_parser.py:
we should readmiscregwitheffect not readmiscreg
src/arch/sparc/asi.cc:
Fix AsiIsNucleus spelling with respect to header file
Add ASI_LSU_CONTROL_REG to AsiSiMmu
src/arch/sparc/asi.hh:
Fix spelling of two ASIs
src/arch/sparc/isa/decoder.isa:
switch back to defaults letting the isa_parser insert readMiscRegWithEffect
src/arch/sparc/isa/formats/mem/util.isa:
Flesh out priviledgedString with hypervisor checks
Make load alternate set the flags correctly
src/arch/sparc/miscregfile.cc:
insert some forgotten break statements
src/arch/sparc/miscregfile.hh:
Add some comments to make it easier to find which misc register is which number
src/arch/sparc/tlb.cc:
flesh out the tlb memory mapped registers a lot more
src/base/traceflags.py:
add an IPR traceflag
src/mem/request.hh:
Fix a bad assert() in request

Merge zizzer:/bk/sparcfs
into zower.eecs.umich.edu:/eecshome/m5/newmemmid

More changes to get SPARC fs closer. Now at 1.2M cycles before difference

configs/common/FSConfig.py:
seperate the hypervisor memory and the guest0 memory. In reality we're going to need a better way to do this at some point. Perhaps auto generating the hv-desc image based on the specified config.
src/arch/sparc/isa/decoder.isa:
change reads/writes to the [hs]tick(cmpr) registers to use readmiscregwitheffect
src/arch/sparc/miscregfile.cc:
For niagra stick and tick are aliased to one value (if we end up doing mps we might not want this).
Use instruction count from cpu rather than cycles because that is what legion does
we can change it back after were done with legion
src/base/bitfield.hh:
add a new function mbits() that just masks off bits of interest but doesn't shift
src/cpu/base.cc:
src/cpu/base.hh:
add instruction count to cpu
src/cpu/exetrace.cc:
src/cpu/m5legion_interface.h:
compare instruction count between legion and m5 too
src/cpu/simple/atomic.cc:
change asserts of packet success to if panics wrapped with NDEBUG defines
so we can get some more useful information when we have a bad address
src/dev/isa_fake.cc:
src/dev/isa_fake.hh:
src/python/m5/objects/Device.py:
expand isa fake a bit more having data for each size request, the ability to have writes update the data and to warn on accesses
src/python/m5/objects/System.py:
convert some tabs to spaces
src/python/m5/objects/T1000.py:
add more fake devices for each l1 bank and each memory controller

Add in code to pass the ASI to translation.

Some basic fix ups, and CWP is no longer set explicitly.

Fixes to the isa description.

src/arch/sparc/isa/base.isa:
Fix a constant.
src/arch/sparc/isa/decoder.isa:
Made carry calculation more consistent.
src/arch/sparc/isa/operands.isa:
Use the right constant.

Made the annul of unconditional conditional branches behave properly, added code to read and write the strand_sts_reg, and made restored a Priv instruction.

Fix up instructions to read and write control registers, and got rid of the control register fields which won't work on a big endian host.

Calling syscalls from within the trap instruction's invoke method won't work because apparently you need an xc for that and not a tc. Cleaned up the TrapInstruction fault in light of this.

Add the syscall number as the second parameter for the trap fault. This could be improved and syscalls could be called from the trap's invoke method.

Adjustments for the AlphaTLB changing to AlphaISA::TLB and changing register file functions to not take faults

Bring casa and casxa up to date

src/arch/sparc/isa/decoder.isa:
Fix up the casa and casxa instructions.
src/arch/sparc/isa/formats/formats.isa:
This is handled in loadstore.isa now
src/arch/sparc/isa/formats/mem/basicmem.isa:
src/arch/sparc/isa/formats/mem/blockmem.isa:
Renamed doSplitExecute to doDualSplitExecute. This differentiates between the version that does both a register and immediate version, and one that just does a register version.
src/arch/sparc/isa/formats/mem/mem.isa:
The cas format is handled in loadstore.isa as well now.
src/arch/sparc/isa/formats/mem/util.isa:
Reorganized things a bit to better support cas

Fixed ldstub to use the right format, and made the load/store operations use the integer microcode register.

Got rid of some outdated comments.

Cleaned up the decoder slightly.

Implemented the saved and restored instructions, fixed up register window instructions so that the cwp is modified at the correct time (when handling the fault), and fixed the "done" instruction.

Broke Load/Store instructions into microcode, and partially refactored memory operations in the SPARC ISA description.

Fixed up ldblockf_p, implemented stdfa properly, and got rid of some old code.

Changed how floating point register numbers are decoded to fit with the spec.

Fix how additional template parameters are handled. Non string parameters are not processed as code.

src/arch/isa_parser.py:
Changed the way the extra template parameters are specified. MIPS might need to be adjusted.
src/arch/sparc/isa/decoder.isa:
Changed how Frd_N was set up.
src/arch/sparc/isa/formats/blockmem.isa:
Fixed up handling of block memory operations
src/arch/sparc/isa/formats/integerop.isa:
src/arch/sparc/isa/formats/mem.isa:
src/arch/sparc/isa/formats/priv.isa:
Fix up extra template parameters.

Some support for handling block loads and stores and ASIs properly.

src/arch/sparc/isa/bitfields.isa:
Added a field to retrieve the asi from the ExtMachInst
src/arch/sparc/isa/decoder.isa:
Fixed up how the size of memory operations where handled, and use the new EXT_ASI bit field.
src/arch/sparc/isa/formats.isa:
add includes for the new formats.
src/arch/sparc/isa/formats/basic.isa:
Add a template for BasicDecodeWithMnemonic which is needed by the unimp format.
src/arch/sparc/isa/formats/mem.isa:
Change around the memory format to figure out the memory access width on its own.
src/arch/sparc/isa/operands.isa:
Added support for the operands of block loads/stores which are offset from Frd.
src/arch/sparc/utility.hh:
Encoded the ASI into the ExtMachInst

Cleaned up floating point by removing unnecessary conversions and by implementing faligndata more correctly.

Fix annulled unconditional branches

Two bugs found by my tracing tool.
1. alignaddr wrote it's address to a floating point register rather than a gpr.
2. sethi was sign extending it's immediate value.

Changes to build m5.fast

Tweaks to Ali's changes

fixes for gcc 4.1
Nate needs to fix sinic builder stuff
Gabe needs to verify my fixes to decoder.isa

OPT/DEBUG compiles for ALPHA_FS, ALPHA_SE, MIPS_SE, SPARC_SE with this changeset

README:
Fix the swig version in the readme
src/SConscript:
remove sinic until nate fixes the builder crap for it
src/arch/alpha/system.hh:
src/arch/mips/isa/includes.isa:
src/arch/sparc/isa/decoder.isa:
src/base/stats/visit.cc:
src/base/timebuf.hh:
src/dev/ide_disk.cc:
src/dev/sinic.cc:
src/mem/cache/miss/mshr.cc:
src/mem/cache/miss/mshr_queue.cc:
src/mem/packet.hh:
src/mem/request.hh:
src/sim/builder.hh:
src/sim/system.hh:
fixes for gcc 4.1

Adjusted the decoder a little.

Added alot of fp instructions, and some impdep instructions.

Fixed subtract with carry, and started some work with floating point.

src/arch/sparc/isa/decoder.isa:
fixed subc, subccc, added decoding for impdep1 to fit with ua2005, and started work on floating point.
src/arch/sparc/isa/operands.isa:
Added in floating point operands, and changed the numbering of operands.
src/arch/sparc/regfile.hh:
Fixed some memory errors related to floating point.

Cleaned things up a little.

Used the Priv and new HPriv instruction formats, which have been tweaked to let some checks be done by the misc reg file.

Implement PR/HPR/ASR for full system
Rip out storage in miscreg file that will never store anything
Add storage and defines for Priv and Hyperpriv registers
Change defines to match the spec register numbers
Change the way misc registers are named to match the spec with offsets to deal with ASR/PR/HPR/FSR.
Change contextval to an int since both global registers and windowed registers are indexed by int in UA2005.
Use bitfields for things that are rarely used in decoder
Instead of decoding ASR/PR/HPR and having a specfic instruction, use a generic instruction instead

Still todo:
Protect rdpr, rdhpr, wrpr, wrhpr with checks that fault in insufficient privs
Deal with signaling interrupts on timer expiration
Deal with writes to softint/PIL generating interrupts how those are vectored to the CPU

Other misc:
Instruction decoding needs major help!

src/arch/sparc/isa/decoder.isa:
Remove tons of MISCREG_XXXX defines that weren't used and ControlRegs in that were never used. Ones that were used rarely
changed to bitfields.
src/arch/sparc/isa/formats/integerop.isa:
These seems like a whole lot of overkill in printing, but i'll leave it the way it is for now. Allow Ccr to be set
at once
src/arch/sparc/isa/formats/priv.isa:
PrivTick is handled by miscreg now, don't need a seperate class for it
src/arch/sparc/isa/operands.isa:
prune the number of control regs down to a reasonable amount
src/arch/sparc/isa_traits.hh:
Replace 8 defines with 1 and flick some bits
src/arch/sparc/process.cc:
Better to clean the entire registers that specific bits which leads to indetermanistic behavior.
src/arch/sparc/regfile.hh:
Rip out storage that will never be backed by anything
Add storage for Priv and Hyperpriv registers
change defines to match the spec
change the way misc registers are named to match the spec with offsets to deal with ASR/PR/HPR/FSR.
change contextval to an int since both global registers and windowed registers are indexed by int in UA2005.

New directory structure:
- simulator source now in 'src' subdirectory
- imported files from 'ext' repository
- support building in arbitrary places, including
outside of the source tree. See comment at top
of SConstruct file for more details.
Regression tests are temporarily disabled; that
syetem needs more extensive revisions.

SConstruct:
Update for new directory structure.
Modify to support build trees that are not subdirectories
of the source tree. See comment at top of file for
more details.
Regression tests are temporarily disabled.
src/arch/SConscript:
src/arch/isa_parser.py:
src/python/SConscript:
Update for new directory structure.