In O3, a nop is used to carry faults down the pipeline that didn't originate
from an instruction. If the instruction doesn't do anything, that is just
returns NoFault, but doesn't have IsNop set, the NoFault will overwrite the
fault that's being sent down and nothing will happen.
--HG--
extra : convert_revision : 54d99002b550ca0e1cf14603f588dc1038e3e535
Each "strand" may need to have a private copy of this state, but I couldn't
find anywhere in the spec that said that after looking briefly.
This prevents writes to the thread context in o3 which was causing the
pipeline to be flushed and stopping any forward progress. The other ASI
accessible state will probably need to be accessed differently if/when we get
O3 full system up and running.
--HG--
extra : convert_revision : fa7fba812d7f76564ef4a23818e60f536710d557
Fixed the asz assembler symbol.
Adjusted the condion checks to have appropriate options.
Implemented the SCAS microcode.
Attached SCAS into the decoder.
--HG--
extra : convert_revision : 17bf9ddae6bc2069e43b076f8f83c4e54fb7966c
There is a fundemental flaw in how unaligned accesses are supported, but this
is still an improvement.
--HG--
extra : convert_revision : 1c20b524ac24cd4a812c876b067495ee6a7ae29f
The only cases where this was the correct behavior are now handled with the
"B" operand type, and doing things this way was breaking some instructions,
notably a shift.
--HG--
extra : convert_revision : 072346d4f541edaceba7aecc26ba8d2cd756e481
Make instructions observe segment prefixes, default segment rules, segment
base addresses.
Also fix some microcode and add sib and riprel "keywords" to the x86
specialization of the microassembler.
--HG--
extra : convert_revision : be5a3b33d33f243ed6e1ad63faea8495e46d0ac9
This lets you index into a group of registers without having to know
explicitly which one is the lowest in that group.
--HG--
extra : convert_revision : e3cad25a1c5910955204c37177b049ca9834cfd9
The arch_prctl system call is used to set and get the FS and GS segment
bases. The FS segment is use for TLS, so glibc needs to be able to set it
up.
--HG--
extra : convert_revision : 79501491a15967a7a862add846ff88a934fb1b37
After very carefully reading through the Linux source, I'm pretty confident I now know -exactly- how the initial stack frame is constructed, filled, and aligned.
--HG--
extra : convert_revision : 3c654ade7e458bdd5445026860f11175f383a65f
Move the argument files to src/sim and add a utility.cc file with a function
getArguments() that returns the given argument in the architecture specific fashion.
getArguments() was getArg() is the architecture specific Argument class and has had
all magic numbers replaced with meaningful constants. Also add a function to the
Argument class for testing if an argument is NULL.
--HG--
rename : src/arch/alpha/arguments.cc => src/sim/arguments.cc
rename : src/arch/alpha/arguments.hh => src/sim/arguments.hh
extra : convert_revision : 8b93667bafaa03b52aadb64d669adfe835266b8e
Loops of header files including each other was causing compilation to fail. To fix it, a bunch of unnecessary includes were removed, and the code in isa_traits.cc which brought a bunch of include chains together was broken up and put in proximity to the header files that delcared it.
--HG--
extra : convert_revision : 66ef7762024b72bb91147a5589a0779e279521e0
R11 is just junk after the start of exectuion because we're "returning" from
an execve call and linux destroys the contents of rcx and r11 on system calls.
--HG--
extra : convert_revision : 6bf69a50ce56e0355dfdd41524163874340beec0
These are the only floating point instructions that get used in my simple hello world test. These instructions are for setting up the floating point control register. Their not being implemented doesn't affect anything because floating point isn't used.
--HG--
extra : convert_revision : 4dfb9ef2a5665f034946c504978029e8799e64cd
