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c1a1c37980785fa81bb0d8f6aeea7692ccdce582
Commit Graph
196 Commits
Author SHA1 Message Date
Alyssa Rosenzweig c1a1c37980 OpcodeDispatcher: mark ideas to improve SHLD 
a bit tricky right now.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-30 22:26:59 -04:00
Mai fa3352004e Merge pull request #3381 from alyssarosenzweig/opt/masking 
Allow upper garbage on a bunch of instructions
 2024-01-30 10:07:53 -05:00
Mai 58f3d3caf5 Merge pull request #3380 from alyssarosenzweig/opt/pdep 
Optimize PDEP
 2024-01-29 13:27:15 -05:00
Alyssa Rosenzweig 16a54742e6 OpcodeDispatcher: optimize 32-bit tzcnt 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig ad9aa0bc87 OpcodeDispatcher: optimize 32-bit lzcnt 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig bd2b3f35a3 OpcodeDispatcher: optimize 32-bit popcnt 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig 50169ce640 OpcodeDispatcher: optimize 32-bit pext 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig baae2d68f9 OpcodeDispatcher: optimize 32-bit bextr 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig ad8d038b8a OpcodeDispatcher: optimize 32-bit blsi 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig 820932e3c7 OpcodeDispatcher: optimize 32-bit blsmsk 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig 6f11f2e6f4 OpcodeDispatcher: optimize 32-bit blsr 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:11:25 -04:00
Alyssa Rosenzweig f5ad7682c3 OpcodeDispatcher: optimize 32-bit pdep 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-29 13:06:56 -04:00
Ryan Houdek 56d8080ec9 Merge pull request #3345 from Sonicadvance1/fix_syscall_registers 
OpcodeDispatcher: Fixes syscall rcx/r11 generation
 2024-01-22 15:21:13 -08:00
Billy Laws e323938173 FEXCore: Fix RCL/RCR shift wraparound behaviour 
This ends up being cleaner to handle outside of
CalculateFlags_ShiftVariable as constant masking is only needed for
RCL/RCR.
 2024-01-21 18:15:50 +00:00
Ryan Houdek 1f7a619c79 OpcodeDispatcher: Fixes syscall rcx/r11 generation 
Noticed this while writing #3342.

Fixes #3343

The syscall instruction is defined in the documentation that it will set
RCX to the next instruction's RIP and R11 to be RFLAGS. We entirely
skipped this which I noticed while writing unit tests.

Adds unittests to test both 32-bit and 64-bit behaviour because our
helper shares code with both.

I don't know if anything actually relied on this behaviour but we should
definitely support it.
 2024-01-12 19:14:30 -08:00
Alyssa Rosenzweig 58127bd0e8 OpcodeDispatcher: optimize trivial cmpxchgs 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-12 12:23:34 -04:00
Alyssa Rosenzweig e8945dfb6d OpcodeDispatcher: optimize gpr cmpxchg 
NZCV stuff.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2024-01-12 12:03:28 -04:00
Ryan Houdek 4b3792196f Merge pull request #3303 from Sonicadvance1/initial_runtime_longmode_switch 
OpcodeDispatcher: Initial support for runtime long-mode switch
 2024-01-04 18:17:54 -08:00
Alyssa Rosenzweig 04a88ed3ab Merge pull request #3353 from Sonicadvance1/public_interface_cleaning 
FEXCore interface cleaning
 2024-01-03 15:14:54 -04:00
Ryan Houdek d8f20751fe FEXCore: Moves IREmitter from the public API to backend 
No functional change
 2023-12-25 07:00:29 -08:00
Ryan Houdek bce694ebb5 FEXCore: Moves BitUtils to FHU 
No functional change
 2023-12-25 06:38:51 -08:00
Ryan Houdek 9e5d7aa5fe OpcodeDispatcher: Initial support for runtime long-mode switch 
This has the Frontend and OpcodeDispatcher select their operating mode
depending on the incoming code segment long-mode flag.

Adds some asserts since currently it is unexpected if the configuration
changes at runtime.

This is fairly straightforward for an initial setup but isn't fully
fleshed out.

Right now FEX's x86 tables aren't setup in a way to support choosing a
different instruction decoding depending on runtime operating mode
change, so that would break in interesting ways.

Primarily this just gets FEX setup to start piping the operating mode
through from the frontend to the backend. This is a long term task, so
it is going to take a long time to iron out all the issues.
 2023-12-21 01:54:19 -08:00
Mai 3d2cbc5d08 Merge pull request #3317 from Sonicadvance1/fix_imul_flags2 
OpcodeDispatcher: Fixes flags generation in imul
 2023-12-19 11:43:21 -05:00
Ryan Houdek 1a2f41922c OpcodeDispatcher: Optimize SIB addr calculation 
When the address calculation for SIB has both index and base then we can
optimize this to an add with a shifted register. This will convert a
three instruction sequence in to one instruction in most cases.
 2023-12-15 13:08:46 -08:00
Ryan Houdek 5c6f229e76 OpcodeDispatcher: Fixes flags generation imul 
On overflow with 32-bit we weren't setting the flags correctly.
 2023-12-07 01:08:02 -08:00
Alyssa Rosenzweig 2a2c389be6 OpcodeDispatcher: rm masking in 32-bit andn 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-12-05 09:04:32 -04:00
Alyssa Rosenzweig 9417c93110 OpcodeDispatcher: remove outdated comment 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 14:23:41 -04:00
Alyssa Rosenzweig 068599b1ec OpcodeDispatcher: use size-appropriate alu in bt* 
saves zero-extending move for 32-bit ops.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 14:22:21 -04:00
Alyssa Rosenzweig 7216415bfc OpcodeDispatcher: reorder flag calcs in bt* 
saves big moves.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 14:22:21 -04:00
Alyssa Rosenzweig 3020626506 OpcodeDispatcher: unify bt/btc/bts/btr impls 
they're all copypastes of each other, unify into one general "bit test & perform
action" template. this means most of the wins from the previous commits now
apply for bt* without more copypaste.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 14:22:21 -04:00
Alyssa Rosenzweig 0a79fa8d5d OpcodeDispatcher: remove masking for 32/64-bit bt 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 13:40:18 -04:00
Alyssa Rosenzweig f8380b9adb OpcodeDispatcher: use smaller shifts for BT 
if the shift is < N, and we grab bit 0 after, we only need to consider <=N
bits of the source. this lets us use 32-bit lsr for 32-bit bt, which will
reduce masking in the next commit.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 13:40:18 -04:00
Alyssa Rosenzweig d898028bc3 OpcodeDispatcher: optimize BT with constant 
use the rmif properly.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 13:35:23 -04:00
Alyssa Rosenzweig 14ba64a22d OpcodeDispatcher: use rmif masking for bt 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 13:20:22 -04:00
Alyssa Rosenzweig 6716077cb6 OpcodeDispatcher: don't mask bt source 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-29 13:16:55 -04:00
Ryan Houdek a7caf83022 FEXCore: Fixes imul returning garbage data 
When a 32-bit imul was being executed it had a chance of returning
garbage data in the upper 32-bits of the 64-bit result.
While this didn't typically cause problems, this gets exacerbated from
32-bit applications executing multiplies for address calculations.

A combination of commits 7146691360 and
d01b457727 exposed this problem where
previously there would be multiple moves between the calculation and
data use which would have zero'd the upper bits for us previously.

Now that we are no longer doing that, we need to make sure the opcode
dispatcher doesn't generate broken code instead.

Fixes Dungeon Defenders, which hasn't worked since FEX-2308.

Adds an ASM test that ensures we don't break it again.
 2023-11-24 14:04:05 -08:00
Alyssa Rosenzweig f60608a9c0 OpcodeDispatcher: allow garbage for 32bit inc/dec 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-17 17:37:24 -04:00
Alyssa Rosenzweig 153d871be2 OpcodeDispatcher: allow garbage for 32-bit cmp 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-17 17:37:24 -04:00
Alyssa Rosenzweig 149f3e6f6d OpcodeDispatcher: rm flagsOp unused since select rework 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-17 17:37:24 -04:00
Alyssa Rosenzweig 56841f0e50 OpcodeDispatcher: avoid moves with 64bit imul 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-14 08:40:41 -04:00
Alyssa Rosenzweig 723146050b OpcodeDispatcher: allow garbage with multiplies 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-14 08:40:41 -04:00
Alyssa Rosenzweig 89b00c89aa OpcodeDispatcher: optimize rcl 1-bit 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig d38917b5f0 OpcodeDispatcher: rm pointless constant 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig 910e0242c1 OpcodeDispatcher: optimize rcr 1-bit 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig 651b7bb75d OpcodeDispatcher: optimize RCL 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig c9f13ae1dd OpcodeDispatcher: optimize RCR the usual ways 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig 862e575100 OpcodeDispatcher: avoid some ubfx for rcr with flagm 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig 0f25a960ee OpcodeDispatcher: remove bfe for small shl imm 
We allow the garbage in flags calculation, it's ignored.

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig 282ed3e309 OpcodeDispatcher: optimize bsf/bsr 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-13 21:21:01 -04:00
Alyssa Rosenzweig 238e52f74a OpcodeDispatcher: Don't mask 32-bit bzhi either 
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
 2023-11-12 17:36:46 -04:00