Ummm, in simple terms - this statement is flat out 100% wrong.
LEA with the SIB byte has been around since 386 and is included on every CPU
Linux is capable of running on.
Compile this using -m386 and look at the ASM listing file and convince
yourself.
unsigned int foo(int bar)
{
return ((bar<<3)+bar);
}
GCC is going to generate a MOV of parm to EAX, then a LEA EAX,[EAX+EAX*8]
Don't trust me - compile this and prove it to yourself.
----- Original Message -----
From: "Bodo Eggert" <[email protected]>
To: "Gene Heskett" <[email protected]>; <[email protected]>;
<linux->
>
> However, the multiplicator is not documented for i486, therefore it will
be a i586
> extension.
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