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Re: [Qemu-devel] [RFC PATCH-for-4.1] target/i386: Correct misplaced brea
Re: [Qemu-devel] [RFC PATCH-for-4.1] target/i386: Correct misplaced break statement in gen_shiftd_rm_T1()
Fri, 19 Jul 2019 14:13:22 +0200
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On 19/07/19 13:51, Peter Maydell wrote:
>> I haven't looked closely at the code but I would guess that the
>> fallthrough is intended, because the default label has an "ot == MO_16"
> Yeah, this code is really weird -- if TARGET_X86_64 then
> MO_16 falls through into MO_32, but if only i386 then
> MO_16 falls through into the default case ?!?
Yes, and in either case MO_16 falls through into the 32-bit code.
However, the i386 32-bit version and the x86-64 64-bit version are
unified into a single piece of code for TARGET_LONG_BITS-bit operands.
Almost, because you still need that ugly special case for MO_16 in the