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(***********************************************************************)
(* *)
(* 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. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* Instruction scheduling for the HPPA *)
open Arch
open Mach
class scheduler = object (self)
inherit Schedgen.scheduler_generic
(* Latencies (in cycles). Roughly based on the ``Mustang'' chips. *)
method oper_latency = function
Ireload -> 2
| Iload(_, _) -> 2
| Iconst_float _ -> 2 (* turned into a load *)
| Iintop Imul -> 2 (* ends up with a load *)
| Iaddf | Isubf | Imulf -> 3
| Idivf -> 12
| _ -> 1
(* Issue cycles. Rough approximations. *)
method oper_issue_cycles = function
Iconst_float _ -> 3
| Iconst_symbol _ -> 2
| Iload(_, Ibased(_, _)) -> 2
| Istore(_, Ibased(_, _)) -> 2
| Ialloc _ -> 5
| Iintop Imul -> 10
| Iintop Ilsl -> 3
| Iintop Ilsr -> 2
| Iintop Iasr -> 3
| Iintop(Icomp _) -> 2
| Iintop(Icheckbound) -> 2
| Iintop_imm(Idiv, _) -> 4
| Iintop_imm(Imod, _) -> 5
| Iintop_imm(Icomp _, _) -> 2
| Iintop_imm(Icheckbound, _) -> 2
| Ifloatofint -> 4
| Iintoffloat -> 4
| _ -> 1
end
let fundecl f = (new scheduler)#schedule_fundecl f
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