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| From: | Richard Henderson |
| Subject: | Re: [Qemu-devel] [PATCH v5 07/18] qemu-thread: add simple test-and-set spinlock |
| Date: | Wed, 18 May 2016 09:02:37 -0700 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.0 |
On 05/18/2016 08:35 AM, Peter Maydell wrote:
(v7 probably gets compiled the same way as v6 here, though.)
The meaningful difference in v7 is ldrexb, which goes to the byte semantics of __atomic_test_and_set, which is how this digression got started.
r~
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