Re: Custom Instructions

[Nikolaos Ikonomakis <nikos_ikono1989 at yahoo dot gr>]

Am 17.09.2010 21:57, schrieb Ian Lance Taylor:
> Nick<nikos_ikono1989@yahoo.gr>  writes:
>
>    
> > the problem starts at the basics: no matter how much i've looked in the
> > interwebs, i still don't understand i386-opc.tbl. for example, i don't know what
> > the parts of this line mean: "mov, 2, 0xc6, 0x0, 1, 0, W|Modrm|No_sSuf|No_ldSuf,
> >
> > { Imm8|Imm16|Imm32|Imm32S,
> > Reg8|Reg16|Reg32|Reg64|Byte|Word|Dword|Qword|Unspecified|BaseIndex|Disp8|Disp16|
> >
> > Disp32|Disp32S
> > }". ok, "mov" is the mnemonic, "2" is (guess) the number of operands, in
> > brackets the type of operands accepted (not all of them clear), but what about
> > the two hexadecimal values, the "1" and "0"(if not "0" then something like
> > "Cpu386", "Cpu64"), "No_*Suf"?
> >      
> See struct insn_template in opcodes/i386-opc.h.
>
>    
> > one further question would be, do i have to change other files as well (e.g.
> > i386-opc.h, i386-init.h etc)?
> >      
> It sort of depends on what you want to do, but probably not.
>
> Ian
>
>    
Thank you Ian for your quick reply. I had a glimpse on insn_template and 
it looks just great, many thanx for the hint!

Nick