Messages in this thread | | | Date | Mon, 15 Jul 2013 11:40:52 -0700 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86/asm: avoid mnemonics without type suffix |
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On 07/14/2013 12:23 PM, Jeremy Fitzhardinge wrote: > The SDM entry for BT mentions that the instruction may touch 2 or 4 > bytes depending on the operand size, but doesn't specifically mention > that a 64 bit operation size touches 8 bytes - and it doesn't mention > anything at all about operand size and access size in BTR/BTS/BTC > (unless it's implied as part of the discussion about encoding the MSBs > of a constant bit offset in the offset of the addressing mode). Is that > an oversight?
Most likely. I'll check with the people responsible for the SDM here at Intel.
-hpa
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