yaxpeax-x86 - yaxpeax x86 decoder

Age	Commit message (Collapse)	Author
2021-07-02	consolidate length/extension checks to help compilers DCE	iximeow

2021-07-02	`Nothing` operand code must be decoded with operand_count=0	iximeow

2021-07-01	fix warnings	iximeow

2021-07-01	reorder prefix checks	iximeow
	this measures a bit faster. it doesn't seem like it should be. the rex prefix checks compile identically but move a lea for a later expression up and pipelines better?
2021-07-01	reallocate OperandCode, convert disparate registers to array	iximeow
	also remove redundant assignments of operand_count and some OperandSpec, bulk-assign all registers and operands on entry to `read_instr`. this all, taken together, shaves off about 7 cycles per decode.
2021-07-01	making opcode u32 reduces a stall?	iximeow

2021-07-01	complete yaxpeax-arch 0.1.0 adaptation, shore up .mem_size()	iximeow

2021-07-01	update yaxpeax-x86 to yaxpeax-arch 0.1.0 interfaces	iximeow

2021-06-29	fix several lingering mem_size discrepancies	iximeow

2021-06-28	remove old movsx/movzx-related memory size hacks	iximeow

2021-06-28	remove unused evex variants from generated code	iximeow

2021-06-28	clean up protected mode vex-related warnings	iximeow

2021-06-28	remove a few operand cases	iximeow
	vex decoding is really intended to avoid explosions in code size more than anything...
2021-06-28	round out x86_32 support - avx2, avx, memory sizes	iximeow

2021-06-28	protected mode memory sizes	iximeow
	also some long-mode cleanup in corresponding areas
2021-06-27	protected-mode avx512	iximeow

2021-06-27	remove support for nonexistent prefixes	iximeow

2021-06-27	PartialEq impls for data in instructiosn, and Instruction itself	iximeow

2021-06-27	all tests now passing for long mode	iximeow

2021-06-27	report memory sizes for all long-mode instructions	iximeow

2021-06-26	awkward	iximeow
	i really didnt know rust could do this
2021-06-26	clean up avx2-related warnings	iximeow

2021-06-26	add long-mode avx512 support, except for compressed displacements	iximeow

2021-06-12	finish up long mode avx2	iximeow

2021-06-11	add extensive avx and initial avx2 tests, fix several bugs and missing ↵	iximeow
	instructions
2021-06-11	remove vex ops file, didnt mean to track that in the first place	iximeow

2021-05-31	fix typo	iximeow

2021-05-16	fix ShowContextual rendering error with stale data and operands, publish 0.2.20.2.2	iximeow

2021-05-07	remove dead OperandSpec variants	iximeow

2021-05-07	update yaxpeax-arch to 0.0.5, fix interface breakages	iximeow

2021-03-22	and clean up some warnings	iximeow

2021-03-22	port long-mode decoder updates to protected-mode	iximeow

2021-03-21	remove some forgotten println comments	iximeow

2021-03-21	include memory sizes on inc/dec in C format	iximeow

2021-03-21	make Opcode, Operand, and DecodeError non_exhaustive	iximeow
	in the future these can and will change (new operands, new instructions) and i would prefer they not be major breaking changes. applications can ignore them and probably do undesired variants anyway. if you want to write a 1120-variant match, are you me? why would you do this
2021-03-21	in real programs, having read_operands inlined hurts performance!	iximeow
	the in-repo benchmark got better with this inlined but it's probably better to leave it up to the compiler when finally stitching stuff together. i suspect that having read_operands inlined resulted in just too many live values, and the compiler was inspired to play hijinks that pipelined poorly. disas-bench shows a ~15% improvement from this change.
2021-03-21	fuzzing shows resetting operands is not beneficial	iximeow

2021-03-21	fix potential successful decodes with Opcode::Invalid	iximeow
	vmov* are.. somehow messed up too
2021-03-21	add tsxldtrk	iximeow
	does intel know no bounds
2021-03-21	xed says setssbsy and saveprevssp are more permissive	iximeow

2021-03-21	add missing vpmaxuw, remove nonsense avx mov	iximeow

2021-03-21	complete CET support, add UINTR, add missing VORP{S,D}, other cleanup	iximeow

2021-03-21	add waitpkg, clean up unused values, old comments	iximeow

2021-03-21	add tdx	iximeow
	decoder flag to come
2021-03-21	rewrite 0f-based instruction handling	iximeow
	this is... a more significant rewrite than i expected yaxpeax-x86 to ever need. it turns out that capstone is extremely permissive about duplicative 66/f2/f3 prefixes to the point that the implemented prefex handling was unsalvageable. while this replaces the 0f opcode tables, i haven't profiled these changes. it's possible this is a net improvement for single-byte opcodes, it could be a net loss. code size may be severely impacted. there is still work to do. but this in total gets very close to iced/xed/zydis parity, far more than before. also adds several small extensions, gfni, 3dnow, enqcmd, invpcid, some of cet, and a few missing avx instructions.
2021-03-17	support several new extensions, 3dnow, and nuance in invalid operands	iximeow

2021-03-14	alternate display mode for c-style expressions	iximeow

2021-03-13	split ffi crate to support distinct 16, 32, and 64-bit builds	iximeow
	initial work to optionally discard any instruction printing support when using `-Z build-std` to fully remove .eh_frame, a stripped long_mode_no_fmt .so is 61kb!
2021-01-15	support xchg AX/reg0.1.5	iximeow

2021-01-15	small perf tweaks	iximeow
	clearing reg_rrr and reg_mmm more efficiently is an extremely small win, but a win read_imm_signed generally should inline well and runs afoul of some heuristic. inlining gets about 8% improved throughput on the (unrealistic) in-repo benchmark it would be great to be able to avoid bounds checks somehow; it looks like they alone are another ~10% of decode time. i'm not sure how to pull that off while retaining the generic iterator parameter. might just not be possible.