| Age | Commit message (Collapse) | Author | |
|---|---|---|---|
| 2021-07-04 | add real-mode decoder | iximeow | |
| 2021-07-04 | 16-bit addressing in protected mode may see avx512 masks too | iximeow | |
| 2021-07-04 | fix several incorrect tests and docs in 64- and 32-bit modes | iximeow | |
| 2021-07-03 | update protected_mode to match long_mode docs, apis | iximeow | |
| 2021-07-03 | update DecodeError impls | iximeow | |
| 2021-07-03 | document public members in long_mode | iximeow | |
| 2021-07-03 | write some dang docs, export `MemoryAccessSize` where you'll look for it | iximeow | |
| 2021-07-03 | export long_mode as amd64, a more recognizable name | iximeow | |
| 2021-07-03 | more carefully test mmx operand sizes | iximeow | |
| 2021-07-03 | factor out MemoryAccessSize | iximeow | |
| 2021-07-03 | add tests for MemoryAccessSize, consistentify style on docs | iximeow | |
| 2021-07-03 | be more strict about denying invalid operands | iximeow | |
| 2021-07-03 | do not reject prefixed sgdt, add a TODO for xop | iximeow | |
| not that xop will ever be wanted, rip | |||
| 2021-07-03 | support AMD `sev_snp` | iximeow | |
| 2021-07-03 | instructions with evex-coded registers may have registers other than 0 | iximeow | |
| 2021-07-03 | defer checking invalid lengths for multi-prefix instructions | iximeow | |
| this profiles slightly better? not entirely sure why... | |||
| 2021-07-03 | document some of the weird decisions in read_instr | iximeow | |
| 2021-07-03 | enforce reserved evex prefix bits | iximeow | |
| 2021-07-03 | clean up x86_32 and make interfaces match x86_64 | iximeow | |
| 2021-07-03 | prefixes on 0f01-series opcodes are more strict | iximeow | |
| 2021-07-03 | add hreset | iximeow | |
| 2021-07-03 | port over x86_64 improvements to x86_32 | iximeow | |
| 2021-07-03 | vbroadcastsd requires W | iximeow | |
| 2021-07-03 | support pconfig/tme | iximeow | |
| 2021-07-03 | reject instructions when their opcode is `Invalid` | iximeow | |
| the evex route would allow "valid" instructions that have the opcode `invalid`. this is.. not correct. | |||
| 2021-07-03 | fix incorrect rex prefix selection | iximeow | |
| 2021-07-02 | adjust decode logic for better pipelining | iximeow | |
| at least on my zen2. when reading prefixes, optimize for the likely case of reading an instruction rather than an invalid run of prefixes. checking if we've exceeded the x86 length bound immediately after reading the byte is only a benefit if we'd otherwise read an impossibly-long instruction; in this case we can exit exactly at prefix byte 15 rather than potentially later at byte 16 (assuming a one-byte instruction like `c3`), or byte ~24 (a more complex store with immediate and displacement). these casese are extremely unlikely in practice. more likely is that reading a prefix byte is one of the first two or three bytes in an instruction, and we will never benefit from checking the x86 length bound at this point. instead, only check length bounds after decoding the entire instruction. this penalizes the slowest path through the decoder but speeds up the likely path about 5% on my zen2 processor. additionally, begin reading instruction bytes as soon as we enter the decoder, and before initial clearing of instruction data. again, this is for zen2 pipeline reasons. reading the first byte and corresponding `OPCODES` entry improves the odds that this data is available by the time we check for `Interpretation::Prefix` in the opcode scanning loop. then, if we did *not* load an instruction, we immediately know another byte must be read; begin reading this byte before applying `rex` prefixes, and as soon as a prefix is known to not be one of the escape-code prefix byte (c5, c4, 62, 0f). this clocked in at another ~5% in total. i've found that `read_volatile` is necessary to force rust to begin the loadwhere it's written, rather than reordering it over other data. i'm not committed to this being a guaranteed truth. also, don't bother checking for `Invalid`. again, `Opcode::Invalid` is a relatively unlikely path through the decoder and `Nothing` is already optiimized for `None` cases. this appears to be another small improvement in throughput but i wouldn't want to give it a number - it was relatively small and may not be attributable to this effect. | |||
| 2021-07-02 | intel keylocker instructions that access memory have memory access sizes | iximeow | |
| 2021-07-02 | fix several strict rejection for several | iximeow | |
| 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 | |||
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index : yaxpeax-x86 | |
| yaxpeax x86 decoder |
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