sim/common/cgen-par.h

   1 /* Simulator header for cgen parallel support.
   2    Copyright (C) 1999 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4
   5 This file is part of the GNU instruction set simulator.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with this program; if not, write to the Free Software Foundation, Inc.,
  19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef CGEN_PAR_H
  22 #define CGEN_PAR_H
  23
  24 /* Kinds of writes stored on the write queue.  */
  25 enum cgen_write_queue_kind {
  26   CGEN_QI_WRITE, CGEN_SI_WRITE, CGEN_SF_WRITE,
  27   CGEN_PC_WRITE,
  28   CGEN_FN_SI_WRITE, CGEN_FN_DI_WRITE, CGEN_FN_DF_WRITE,
  29   CGEN_MEM_QI_WRITE, CGEN_MEM_HI_WRITE, CGEN_MEM_SI_WRITE,
  30   CGEN_NUM_WRITE_KINDS
  31 };
  32
  33 /* Element of the write queue.  */
  34 typedef struct {
  35   enum cgen_write_queue_kind kind; /* Used to select union member below.  */
  36   union {
  37     struct {
  38       UQI *target;
  39       QI   value;
  40     } qi_write;
  41     struct {
  42       SI *target;
  43       SI  value;
  44     } si_write;
  45     struct {
  46       SI *target;
  47       SF  value;
  48     } sf_write;
  49     struct {
  50       USI value;
  51     } pc_write;
  52     struct {
  53       UINT regno;
  54       SI   value;
  55       void (*function)(SIM_CPU *, UINT, USI);
  56     } fn_si_write;
  57     struct {
  58       UINT regno;
  59       DI   value;
  60       void (*function)(SIM_CPU *, UINT, DI);
  61     } fn_di_write;
  62     struct {
  63       UINT regno;
  64       DI   value;
  65       void (*function)(SIM_CPU *, UINT, DI);
  66     } fn_df_write;
  67     struct {
  68       SI   address;
  69       QI   value;
  70     } mem_qi_write;
  71     struct {
  72       SI   address;
  73       HI   value;
  74     } mem_hi_write;
  75     struct {
  76       SI   address;
  77       SI   value;
  78     } mem_si_write;
  79   } kinds;
  80 } CGEN_WRITE_QUEUE_ELEMENT;
  81
  82 #define CGEN_WRITE_QUEUE_ELEMENT_KIND(element) ((element)->kind)
  83
  84 extern void cgen_write_queue_element_execute (
  85   SIM_CPU *, CGEN_WRITE_QUEUE_ELEMENT *
  86 );
  87
  88 /* Instance of the queue for parallel write-after support.  */
  89 /* FIXME: Should be dynamic?  */
  90 #define CGEN_WRITE_QUEUE_SIZE (4 * 4) /* 4 writes x 4 insns -- for now.  */
  91
  92 typedef struct {
  93   int index;
  94   CGEN_WRITE_QUEUE_ELEMENT q[CGEN_WRITE_QUEUE_SIZE];
  95 } CGEN_WRITE_QUEUE;
  96
  97 #define CGEN_WRITE_QUEUE_CLEAR(queue)       ((queue)->index = 0)
  98 #define CGEN_WRITE_QUEUE_INDEX(queue)       ((queue)->index)
  99 #define CGEN_WRITE_QUEUE_ELEMENT(queue, ix) (&(queue)->q[(ix)])
 100
 101 #define CGEN_WRITE_QUEUE_NEXT(queue) (   \
 102   (queue)->index < CGEN_WRITE_QUEUE_SIZE \
 103     ? &(queue)->q[(queue)->index++]      \
 104     : cgen_write_queue_overflow (queue)  \
 105 )
 106
 107 extern CGEN_WRITE_QUEUE_ELEMENT *cgen_write_queue_overflow (CGEN_WRITE_QUEUE *);
 108
 109 /* Functions for queuing writes.  Used by semantic code.  */
 110 extern void sim_queue_qi_write (SIM_CPU *, UQI *, UQI);
 111 extern void sim_queue_si_write (SIM_CPU *, SI *, SI);
 112 extern void sim_queue_sf_write (SIM_CPU *, SI *, SF);
 113
 114 extern void sim_queue_pc_write (SIM_CPU *, USI);
 115
 116 extern void sim_queue_fn_si_write (SIM_CPU *, void (*)(SIM_CPU *, UINT, USI), UINT, SI);
 117 extern void sim_queue_fn_di_write (SIM_CPU *, void (*)(SIM_CPU *, UINT, DI), UINT, DI);
 118 extern void sim_queue_fn_df_write (SIM_CPU *, void (*)(SIM_CPU *, UINT, DI), UINT, DF);
 119
 120 extern void sim_queue_mem_qi_write (SIM_CPU *, SI, QI);
 121 extern void sim_queue_mem_hi_write (SIM_CPU *, SI, HI);
 122 extern void sim_queue_mem_si_write (SIM_CPU *, SI, SI);
 123
 124 #endif /* CGEN_PAR_H */