yaxpeax-x86, branch 0.1.5 yaxpeax x86 decoder support xchg AX/reg 2021-01-16T02:41:16+00:00 iximeow me@iximeow.net 2021-01-16T02:40:31+00:00 6232e8b1daf7067cb2e8065687530d5f88ecb46d 






small perf tweaks
2021-01-16T02:21:19+00:00

iximeow
me@iximeow.net

2021-01-16T02:15:04+00:00

d8083b08dc987adeda73fb13298383c6cf519596

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.





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.







bump yaxpeax-x86 version for release
2021-01-15T22:58:13+00:00

iximeow
me@iximeow.net

2021-01-15T22:58:13+00:00

dd88df2b9769630f8eafe909e00eb3a3a21c954e












fix several missing or invalid decodings among 0f01 opcodes
2021-01-15T22:52:11+00:00

iximeow
me@iximeow.net

2021-01-15T22:52:11+00:00

f057c712f91b215034fe84fa0f22694aaa8dffb3

* `mwaitx`, `monitorx`, `rdpru`, and `clzero` are now supported
* swapgs is no longer decoded in protected mode
* rdpkru and wrpkru are no longer decoded if mod bits != 11





* `mwaitx`, `monitorx`, `rdpru`, and `clzero` are now supported
* swapgs is no longer decoded in protected mode
* rdpkru and wrpkru are no longer decoded if mod bits != 11







fix decoding of rex-prefixed modrm+sib operands selecting index 0b100 and base 0b101
2020-11-20T02:13:24+00:00

iximeow
me@iximeow.net

2020-11-20T02:13:24+00:00

81e9b93aab9217cf7cb508f64b19fc1c0df024b5

for memory operands with a base, index, and displacement either
the wrong base would be selected (register number ignored, so only
`*ax` or `r8*` would be reported), or yaxpeax-x86 would report a
base register is present when it is not (`RegIndexBaseScaleDisp`
when the operand is actually `RegScaleDisp`)

thank you to Evan Johnson for catching and reporting this bug!

also bump crate version to 0.1.4 as this will be immediately tagged and
released.





for memory operands with a base, index, and displacement either
the wrong base would be selected (register number ignored, so only
`*ax` or `r8*` would be reported), or yaxpeax-x86 would report a
base register is present when it is not (`RegIndexBaseScaleDisp`
when the operand is actually `RegScaleDisp`)

thank you to Evan Johnson for catching and reporting this bug!

also bump crate version to 0.1.4 as this will be immediately tagged and
released.







Update README.md (#5)
2020-10-27T08:00:14+00:00

Jan
janbrennen@gmail.com

2020-10-02T16:05:55+00:00

e3a400b7a96284d1394cd710ea3bcee01dbfe95f

* Update README.md

very typpo




* Update README.md

very typpo






fix misdecode of instructions in opcode 0x80
2020-10-27T07:57:33+00:00

iximeow
me@iximeow.net

2020-10-27T07:57:33+00:00

39aaebeb48c30b96b4ff8b66663a1452e2571426












add RegSpec constructors, consts, and const fns
2020-08-15T20:15:29+00:00

iximeow
me@iximeow.net

2020-08-15T20:15:29+00:00

fb9ead64e6c7d96c02627b01b6a85921e2d8f7a4












forgot to strengthen that heading too
2020-08-15T18:40:59+00:00

iximeow
me@iximeow.net

2020-08-15T18:40:59+00:00

8ccbdba5fe492cb853f10cfe3c486cdc5a50e6e9












add register class constants to allow reasoning about register operands
2020-08-15T18:39:04+00:00

iximeow
me@iximeow.net

2020-08-15T18:38:15+00:00

a0b1fddbb55cbab9d482d4f8cffc7ffe87f73864

also bump to 0.1.1





also bump to 0.1.1