[Tinycc-devel] RE: C67 code generator

[TK]

Macros would be good. 

Probably one for each "form" of the instruction.  I think the "form"
basically depends on which functional unit is being used.  The C67 has 2
sides 1/2 or A/B and each side has four different funtional units:
(M,L,S,D).

Or just make a macro for each different form...

TK 

> -----Original Message-----
> From: Peter "Firefly" Lund [mailto:address@hidden
> Sent: Thursday, March 13, 2003 3:10 PM
> To: TK
> Subject: RE: C67 code generator
> 
> On Thu, 13 Mar 2003, TK wrote:
> 
> > I agree please reformat as you desire.
> 
> I am also going to introduce macros for this:
> 
>     } else if (strstr(s,"MPYI.M")==s) {
>         xpath = C67_map_regs(b)^C67_map_regs(c);
> 
>         ASSERT(C67_map_regs(a) == C67_map_regs(c));
> 
>         C67_g(
>               (0                 <<29) |    //creg
>               (0                 <<28) |    //inv
>               (C67_map_regn(c)   <<23) |    //dst
>               (C67_map_regn(b)   <<18) |    //src2
>               (C67_map_regn(a)   <<13) |    //src1 (cst5)
>               (xpath             <<12) |    //x cross path if opposite
> sides
>               (0x4               << 7) |    //opcode
>               (0x0               << 2) |    //opcode fixed
>               (C67_map_regs(c)   << 1) |      //side of dest
>               (0                 << 0));    //parallel
>     } else if (strstr(s,"SHR.S")==s) {
> 
> All the instructions (except branches/jumps and memory load/store, I
> guess) seem to follow the same pattern: fields at fixed positions
> containing register numbers for src1/src2/dst and for the opcode (plus
> a few extra bits to handle the very exposed microarchitecture).
> 
> Any idea on what form would be most useful (for such macros, I mean)?
> 
> -Peter