Messages in this thread | | | Subject | Re: single copy atomicity for double load/stores on 32-bit systems | From | Vineet Gupta <> | Date | Mon, 3 Jun 2019 11:43:20 -0700 |
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On 5/31/19 1:21 AM, Peter Zijlstra wrote: > And I'll stand by my earlier conviction that any architecture that has a > native u64 (be it a 64bit arch or a 32bit with double-width > instructions) but has an ABI that allows u32 alignment on them is daft.
Why ? For 64-bit data on 32-bit systems, hardware doesn't claim to provide any single-copy atomicity for such data and software doesn't expect either.
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