From: Richard Henderson <rth@twiddle.net>
To: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>,
qemu-devel@nongnu.org, Blue Swirl <blauwirbel@gmail.com>
Subject: Re: [Qemu-devel] qemu-x86_64: Error processing bextr
Date: Mon, 10 Jul 2017 13:54:55 -1000 [thread overview]
Message-ID: <d4dc76c1-ea7a-1e11-0070-2685c970db3e@twiddle.net> (raw)
In-Reply-To: <CAPybu_28Fi-QEpoCP2APs+FdEuEOmSJnEK==ubJimE907-WLYw@mail.gmail.com>
On 07/10/2017 01:17 PM, Ricardo Ribalda Delgado wrote:
> 0x00000040008179bf <+31>: 8f ea 78 10 d0 08 04 00 00 bextr $0x408,%eax,%edx
...
> It seems that, bextr is not supported by the emulator/cpu, althoug I
> have launched the emualtor with -cpu Haswell, that should support bmi1
> (https://en.wikipedia.org/wiki/Bit_Manipulation_Instruction_Sets#BMI1)
This is not the BMI1 version of bextr, it's the TBM version of bextr.
https://en.wikipedia.org/wiki/Bit_Manipulation_Instruction_Sets#TBM_.28Trailing_Bit_Manipulation.29
TBM is not implemented in qemu yet.
r~
next prev parent reply other threads:[~2017-07-10 23:56 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-10 23:17 [Qemu-devel] qemu-x86_64: Error processing bextr Ricardo Ribalda Delgado
2017-07-10 23:54 ` Richard Henderson [this message]
2017-07-11 13:12 ` Ricardo Ribalda Delgado
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