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Re: [Qemu-devel] qemu-x86_64: Error processing bextr
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] qemu-x86_64: Error processing bextr |
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Date: |
Mon, 10 Jul 2017 13:54:55 -1000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 |
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~