Messages in this thread | | | Date | Tue, 12 Oct 1999 17:06:16 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: PATCH - assembler glitches |
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On Tue, 12 Oct 1999, Martin Dalecki wrote: > > The attached patch is sweepping out obvious errors in IA32 assembler > code.
It's not "obvious errors", as it's actually "non-obvious features". The
movl %ax,%ds
thing actually used to generate the right (32-bit) move on gas, and
movw %ax,%ds
used to generate the WRONG (16-bit) move on gas.
The reason the 32-bit move is the right one is that both the 32-bit and the 16-bit moves actually do the same thing (the target register is a 16-bit register after all), but the 32-bit move does so in smaller space and faster due to the lack of a size override.
I'd like somebody to sacrifice their first-borne son, and write in blood that gas does the right thing every time these days. Otherwise I will keep the thing that looks strange but has a real explanation for it.
Linus
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