56 lines
1.6 KiB
OCaml
56 lines
1.6 KiB
OCaml
(***********************************************************************)
|
|
(* *)
|
|
(* Objective Caml *)
|
|
(* *)
|
|
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
|
|
(* *)
|
|
(* Copyright 1996 Institut National de Recherche en Informatique et *)
|
|
(* en Automatique. All rights reserved. This file is distributed *)
|
|
(* under the terms of the Q Public License version 1.0. *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
|
|
(* $Id$ *)
|
|
|
|
open Mach
|
|
|
|
(* Instruction scheduling for the Sparc *)
|
|
|
|
class scheduler = object
|
|
|
|
inherit Schedgen.scheduler_generic
|
|
|
|
(* Latencies (in cycles). Wild guesses. *)
|
|
|
|
method oper_latency = function
|
|
Ireload -> 3
|
|
| Iload(_, _) -> 3
|
|
| Iconst_float _ -> 3 (* turned into a load *)
|
|
| Iaddf | Isubf -> 3
|
|
| Imulf -> 5
|
|
| Idivf -> 15
|
|
| _ -> 1
|
|
|
|
(* Issue cycles. Rough approximations. *)
|
|
|
|
method oper_issue_cycles = function
|
|
Iconst_float _ -> 2
|
|
| Iconst_symbol _ -> 2
|
|
| Ialloc _ -> 6
|
|
| Iintop(Icomp _) -> 4
|
|
| Iintop(Icheckbound) -> 2
|
|
| Iintop_imm(Idiv, _) -> 5
|
|
| Iintop_imm(Imod, _) -> 5
|
|
| Iintop_imm(Icomp _, _) -> 4
|
|
| Iintop_imm(Icheckbound, _) -> 2
|
|
| Inegf -> 2
|
|
| Iabsf -> 2
|
|
| Ifloatofint -> 6
|
|
| Iintoffloat -> 6
|
|
| _ -> 1
|
|
|
|
end
|
|
|
|
let fundecl f = (new scheduler)#schedule_fundecl f
|
|
|