FogBugz (Case [Issue]10773) NativeBoost - Structure instruction subclasses properly

A FogBugz case was opened by Camillo Bruni.

Case ID:      10773
Title:        Structure instruction subclasses properly
Status:       Work Needed
Category:     Enhancement
Project:      NativeBoost
Area:         Misc
Priority:     5 - Fix If Time
Milestone:    Later
Assigned To:  Igor Stasenko

URL:          https://pharo.fogbugz.com/default.asp?10773

Many instructions in thet have special space-saving opcodes that do not require an additional ModR/M byte. These instructions are:

DEC, INC, POP, or PUSH used with a word-sized general register.
ADC, ADD, AND, CMP, OR, SBB, SUB, TEST, or XOR used with the accumulator and an immediate.
MOV used with any general register and an immediate.
MOV used with the accumulator and a simple word displacement.
XCHG used with the accumulator and a word register.

Instead of subclasses these are currently separate classes which is wrong.


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