add typed guest pointer template
add X_KSPINLOCK, rework spinlock functions.
rework irql related code, use irql on pcr instead of on XThread
add guest linked list helper functions
renamed ProcessInfoBlock to X_KPROCESS
assigned names to many kernel structure fields
Fully defined the structure.
Single copy of it + single timer across all modules, managing it is now the responsibility of KernelState.
add global_critical_region::PrepareToAcquire, which uses Prefetchw on the global crit. We now know we can use Prefetchw on all cpus that have AVX.
add KeQueryInterruptTime, which is used by some dashboards.
add threading::NanoSleep
add msr field on context
write to msr for mtmsr/mfmsr, do not have correct default value for msr yet, nor has mtmsrd been reimplemented
do not evaluate assert expressions in release at all, while still avoiding unused variable warnings
"turns out theres a lot of quirks with the div instructions we havent been covering
if the denom is 0, we jump to the end and mov eax/rax to dst, which is correct because ppc raises no exceptions for divide by 0 unlike x86
except we don't initialize eax before that jump, so whatever garbage from the previous sequence that has been left in eax/rax is what the result of the instruction will be
and then in our constant folding, we don't do the same zero check in Value::Div, so if we constant folded the denom to 0 we will host crash
the ppc manual says the result for a division by 0 is undefined, but in reality it seems it is always 0
there are a few posts i saw from googling about it, and tests on my rgh gave me 0, but then another issue came up
and that is that we dont check for signed overflow in our division, so we raise an exception if guest code ever does (1<<signbit_pos) / -1
signed overflow in division also produces 0 on ppc
the last thing is that if src2 is constant we skip the 0 check for division
without checking if its nonzero
all weird, likely very rare edge cases, except for maybe the signed overflow division
chrispy — Today at 9:51 AM
oh yeah, and because the int members of constantvalue are all signed ints, we were actually doing signed division always with constant folding"
fixed an earlier mistake by me with the precision of fresx
made some optimization disableable
implemented vkpkx
fixed possible bugs with vsr/vsl constant folding
disabled the nice imul code for now, there was a bug with int64 version and i dont have time to check
started on multiplication/addition/subtraction/division identities
Removed optimized VSL implementation, it's going to have to be rewritten anyway
Added ppc_ctx_t to xboxkrnl shim for direct context access
started working on KeSaveFloatingPointState, re'ed most of it
Exposed some more state/functionality to the kernel for implementing lower level routines like the save/restore ones
Add cvar to re-enable incorrect mxcsr behavior if a user doesnt care and wants better cpu performance
Stubbed out more impossible sequences, replace mul_hi_i32 with a 64 bit multiply
This is a regression in functionality and performance, but a much better
foundation for the future of the project (I think). It can run basic
apps under an SSA interpreter but doesn't support some of the features
required to do real 360 apps yet.
This should make it easier to find files and (in the future) split things
up into separate libraries.
It also changes around emulator initialization to make it a little more
difficult to do things out of order and a little more sensible as to when
real init work happens.
Also adding a skeleton audio system/driver and reworking CPU register
access to be more extensible.
