Gabe Black
f0811eb208
ARM: Define versions of MSR and MRS outside the decoder.
2010-06-02 12:58:05 -05:00
Gabe Black
f61bb9adb9
ARM: Hook up the push/pop versions of stm/ldm in thumb.
2010-06-02 12:58:05 -05:00
Gabe Black
a76ab8e040
ARM: Hook SVC into the thumb decoder.
2010-06-02 12:58:05 -05:00
Gabe Black
cbdebf852e
ARM: Implement SVC (was SWI) outside of the decoder.
2010-06-02 12:58:05 -05:00
Gabe Black
34032f97d6
ARM: Trigger system calls from the SupervisorCall invoke method.
...
This simplifies the decoder slightly, and makes the system call mechanism
very slightly more realistic.
2010-06-02 12:58:05 -05:00
Gabe Black
52460938cb
ARM: Fix multiply operations.
...
These fixes were provided by Ali and fix the saturation condition code and
various multiply instructions.
2010-06-02 12:58:05 -05:00
Gabe Black
4fb6fcd82d
ARM: Decode the scalar saturating add/subtract instructions.
2010-06-02 12:58:05 -05:00
Gabe Black
30dd622622
ARM: Decode the parallel add and subtract instructions.
2010-06-02 12:58:05 -05:00
Gabe Black
62e8487d57
ARM: Implement signed saturating add and/or subtract instructions.
2010-06-02 12:58:05 -05:00
Gabe Black
a1253ec644
ARM: Implemented prefetch instructions/decoding (pli, pld, pldw).
2010-06-02 12:58:05 -05:00
Gabe Black
61b00d3224
ARM: Decode unconditional ARM instructions.
2010-06-02 12:58:04 -05:00
Gabe Black
b6e2f5d33f
ARM: Make sure ldm exception return writes back its base in the right mode.
...
This change moves the writeback of load multiple instructions to the beginning
of the macroop. That way, the MicroLdrRetUop that changes the mode will
necessarily happen later, ensuring the writeback happens in the original mode.
The actual value in the base register if it also shows up in the register list
is undefined, so it's fine if it gets clobbered by one of the loads. For
stores where the base register is the lowest numbered in the register list,
the original value should be written back. That means stores can't write back
at the beginning, but the mode changing problem doesn't affect them so they
can continue to write back at the end.
2010-06-02 12:58:04 -05:00
Gabe Black
89060f1fd8
ARM: Rework how unrecognized/unimplemented instructions are handled.
...
Instead of panic immediately when these instructions are executed, an
UndefinedInstruction fault is returned. In FS mode (not currently
implemented), this is the fault that should, to my knowledge, be triggered in
these situations and should be handled using the normal architected
mechanisms. In SE mode, the fault causes a panic when it's invoked that gives
the same information as the instruction did. When/if support for speculative
execution of ARM is supported, this will allow a mispeculated and unrecognized
and/or unimplemented instruction from causing a panic. Only once the
instruction is going to be committed will the fault be invoked, triggering the
panic.
2010-06-02 12:58:04 -05:00
Gabe Black
aa45fafb2e
ARM: Add support for "SUBS PC, LR and related instructions".
2010-06-02 12:58:04 -05:00
Gabe Black
2419903dc0
ARM: Make ldrs into the PC and ldm exception return do interworking branches.
2010-06-02 12:58:04 -05:00
Gabe Black
28227440a7
ARM: Align the PC when using it as the base for a load.
2010-06-02 12:58:04 -05:00
Gabe Black
d63f748b53
ARM: Implement ADR as separate from ADD.
2010-06-02 12:58:04 -05:00
Gabe Black
e92dc21fde
ARM: Add support for interworking branch ALU instructions.
2010-06-02 12:58:04 -05:00
Gabe Black
11c3361be4
ARM: Fix when the flag bits are updated for thumb.
2010-06-02 12:58:04 -05:00
Gabe Black
14d25fbad0
ARM: Don't rely on undefined behavior to get arithmetic right shift.
...
Shifting to the right of a signed value when the MSB is one is technically
undefined behavior, even though in my experience it's done the "right thing"
and sign extended the value. This replaces the arithmetic right shift code in
ARM that uses that coincidence with some code that relies on bit math.
2010-06-02 12:58:04 -05:00
Gabe Black
05d880f7a1
ARM: Restrict the shift amount from a register to 8 bits.
...
The shift amount when taken from a register is supposed to be truncated to an
8 bit value.
2010-06-02 12:58:04 -05:00
Gabe Black
9ebaf8ecd5
ARM: Define the VFP load/store multiple instructions.
2010-06-02 12:58:04 -05:00
Gabe Black
3f83094af2
ARM: Decode the VFP load/store multiple instructions.
2010-06-02 12:58:04 -05:00
Gabe Black
647edea970
ARM: Fix the constant describing the number of floating point registers.
2010-06-02 12:58:04 -05:00
Gabe Black
2f3102f1ef
ARM: Add templates for VFP load/store multiple instructions.
2010-06-02 12:58:04 -05:00
Gabe Black
739f23c64c
ARM: Add base classes for VFP load/store multiple.
2010-06-02 12:58:04 -05:00
Gabe Black
cb631d87c3
ARM: Add floating point load/store microops.
2010-06-02 12:58:04 -05:00
Gabe Black
3a11412c99
ARM: Add an fp version of one of the microop indexed registers.
2010-06-02 12:58:04 -05:00
Gabe Black
d5aee75efe
ARM: Move the mmap region to where Linux actually has it.
2010-06-02 12:58:04 -05:00
Gabe Black
a8eb9d521c
ARM: Eliminate the unused rhi and rlo operands.
2010-06-02 12:58:03 -05:00
Gabe Black
b02c7f1bcd
ARM: Move the macro mem constructor out of the isa desc.
...
This code doesn't use the parser at all, and moving it out reduces the
conceptual complexity of that code.
2010-06-02 12:58:03 -05:00
Gabe Black
7b62e9ad71
ARM: Make macroops panic if executed directly.
...
The macroop should never be executed, only it's microops will.
2010-06-02 12:58:03 -05:00
Ali Saidi
8fadf2691d
ARM: GCC < 4.3 has some issues with attribute no return on some functions. Fix so it works for older gccs.
2010-06-02 12:58:03 -05:00
Gabe Black
f18040a205
ARM: Split out the "basic" templates and format.
...
--HG--
rename : src/arch/arm/isa/formats/basic.isa => src/arch/arm/isa/templates/basic.isa
2010-06-02 12:58:03 -05:00
Gabe Black
c175f1b993
ARM: Remove unnecessary cruft from includes.isa.
2010-06-02 12:58:03 -05:00
Gabe Black
e29ec7d2ed
ARM: Move the inst2string function out of the isa_desc.
...
Delete the now empty formats/util.isa.
2010-06-02 12:58:03 -05:00
Gabe Black
ae135228fc
ARM: Get rid of the unused ArmGenericCodeSubs.
2010-06-02 12:58:03 -05:00
Gabe Black
8c012e9571
ARM: Make the predecoder print out the ExtMachInst it gathered when traced.
2010-06-02 12:58:03 -05:00
Gabe Black
458bd025d4
ARM: Remove special naming for the new version of multiply.
2010-06-02 12:58:03 -05:00
Gabe Black
2196f75a25
ARM: Hook the new multiply instructions into all the decoders.
2010-06-02 12:58:03 -05:00
Gabe Black
33da368e99
ARM: Implement all integer multiply instructions.
2010-06-02 12:58:03 -05:00
Gabe Black
50229be27f
ARM: Add templates for multiply instructions.
2010-06-02 12:58:03 -05:00
Gabe Black
3430b34cff
ARM: Add base classes for multiply instructions.
2010-06-02 12:58:03 -05:00
Gabe Black
c7d2f43641
ARM: Decode plain binary immediate thumb data processing instructions.
2010-06-02 12:58:03 -05:00
Gabe Black
dcf218155d
ARM: Define a new "movt" data processing instruction.
2010-06-02 12:58:03 -05:00
Gabe Black
b615ed1470
ARM: Hook the new branch instructions into the 32 bit thumb decoder.
2010-06-02 12:58:03 -05:00
Gabe Black
274badd201
ARM: Hook the new branch instructions into the 16 bit thumb decoder.
2010-06-02 12:58:03 -05:00
Gabe Black
b6b2f8891a
ARM: Eliminate the old style branch instructions.
2010-06-02 12:58:03 -05:00
Gabe Black
d082705b01
ARM: Hook the new branch instructions into the ARM decoder.
2010-06-02 12:58:02 -05:00
Gabe Black
9869343636
ARM: Implement branch instructions external to the decoder.
2010-06-02 12:58:02 -05:00
