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i386 instruction

From: "Amruta G. Gokhale" <amruta at cse dot iitb dot ac dot in>
To: gcc-help at gcc dot gnu dot org
Date: Wed, 14 Jun 2006 01:21:57 +0530 (IST)
Subject: i386 instruction

Hello,

I am looking for an instruction whose operation can be described as a combination of two or more instructions. For example, an instruction which first moves the memory operand into register and then takes that register as an operand for the required operation.

Does anyone know whether such instruction is present in i386 assembly instruction set? In particular, is there any "define_insn" RTX pattern in MD file, such that it comprises of two or more different RTL expressions, performing some distinct operation(excluding CLOBBER/setting of CC flag)..

Another hypothetical example of such instruction can be, say add_mult:
add_mult: MULT( PLUS(operand1, operand2), operand3)

Any pointers regarding this would be much helpful.


Thanks,
--
Amruta
MTechII, CSE Dept.,
IIT Bombay

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