Shachar Shemesh wrote:
Tal's question, however, was a different one. He asked whether 90 could mean anything else. Specifically, he asked whether 90 could mean something that actually did something. Without reference to the specific place in the manual where you got that question from, Tal, I doubt anyone here will answer you however.
Shachar,
Please take a look at http://www.achituv.com/intel_ref_3-462.jpg
This is a picture of the page number 3-462 out of the "Intel Instruction Set Reference",
As you can see - the XCHG operations on AX, and EAX with r16's and r32's respectively.
Either I'm missing something, or this is a typo.
I'm not entirely familiar with the different Intel notations (the meanings of the +rw, +rd & /r flags, and what r16 / r32 reffers to,
my guess was that r16 is another name for AX, and r32 is another name for EAX - which is similar to a MIPS notation that I
used to work with. - but I was told that this is not the case.)
Thanks, Tal.
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