qemu-arm
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-arm] [PATCH v3 2/5] target/arm: Fill in ARMISARegisters for kv


From: Richard Henderson
Subject: Re: [Qemu-arm] [PATCH v3 2/5] target/arm: Fill in ARMISARegisters for kvm64
Date: Mon, 12 Nov 2018 17:00:20 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.0

On 11/12/18 3:34 PM, Peter Maydell wrote:
>> The other id_aa64* register fields are all extensions to v8.0, so they should
>> be zero.  I am of course assuming that AdvSIMD is present, otherwise qemu
>> itself probably have failed before now.
> 
> You don't set the id_isar* to say "AdvSIMD present" (or "VFP present"), 
> though.

Those two are almost unique in that they are signed fields.  So 0 indicates
present and -1 indicates not present (and 1 indicates fp16 support).


r~



reply via email to

[Prev in Thread] Current Thread [Next in Thread]