Hi, I'm playing around with the gcc and its generated assembler code for some test applications. I recognized that the gcc prefers the use of the registers eax, (ebx), ecx and edx (x86) for arithmetic instructions like lea, add, mul, etc. I know that the gcc uses several register classes to define which registers can be used for which task (e.g. FIXED_REGS, GENERAL_REGS). Is there also a class that explains the described behavior? Or does the gcc simply looks for unused registers in a special order? Another question: What is meant by the Q_REGS class? Thanks, Paul
