profile-fr550.c

这个是LINUX下的GDB调度工具的源码

    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_GR (cpu, out_GRk);
      vliw_wait_for_CCR (cpu, out_ICCi_1);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_GR (cpu, out_GRk);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  fr550_reset_ccr_flags (cpu, out_ICCi_1);

  /* GRk is available immediately to the next VLIW insn as is ICCi_1.  */
  cycles = idesc->timing->units[unit_num].done;
  return cycles;
}

int
frvbf_model_fr550_u_imul (SIM_CPU *cpu, const IDESC *idesc,
			  int unit_num, int referenced,
			  INT in_GRi, INT in_GRj, INT out_GRk, INT out_ICCi_1)
{
  int cycles;
  /* icc0-icc4 are the upper 4 fields of the CCR.  */
  if (out_ICCi_1 >= 0)
    out_ICCi_1 += 4;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_GRdouble (cpu, out_GRk);
      vliw_wait_for_CCR (cpu, out_ICCi_1);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_GRdouble (cpu, out_GRk);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  /* GRk has a latency of 1 cycles.  */
  cycles = idesc->timing->units[unit_num].done;
  update_GRdouble_latency (cpu, out_GRk, cycles + 1);

  /* ICCi_1 has a latency of 1 cycle.  */
  update_CCR_latency (cpu, out_ICCi_1, cycles + 1);

  fr550_reset_ccr_flags (cpu, out_ICCi_1);

  return cycles;
}

int
frvbf_model_fr550_u_idiv (SIM_CPU *cpu, const IDESC *idesc,
			  int unit_num, int referenced,
			  INT in_GRi, INT in_GRj, INT out_GRk, INT out_ICCi_1)
{
  int cycles;
  FRV_VLIW *vliw;
  int slot;

  /* icc0-icc4 are the upper 4 fields of the CCR.  */
  if (out_ICCi_1 >= 0)
    out_ICCi_1 += 4;

  vliw = CPU_VLIW (cpu);
  slot = vliw->next_slot - 1;
  slot = (*vliw->current_vliw)[slot] - UNIT_I0;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_GR (cpu, out_GRk);
      vliw_wait_for_CCR (cpu, out_ICCi_1);
      vliw_wait_for_idiv_resource (cpu, slot);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_GR (cpu, out_GRk);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  /* GRk has a latency of 18 cycles!  */
  cycles = idesc->timing->units[unit_num].done;
  update_GR_latency (cpu, out_GRk, cycles + 18);

  /* ICCi_1 has a latency of 18 cycles.  */
  update_CCR_latency (cpu, out_ICCi_1, cycles + 18);

  if (CGEN_ATTR_VALUE(idesc, idesc->attrs, CGEN_INSN_NON_EXCEPTING))
    {
      /* GNER has a latency of 18 cycles.  */
      update_SPR_latency (cpu, GNER_FOR_GR (out_GRk), cycles + 18);
    }

  /* the idiv resource has a latency of 18 cycles!  */
  update_idiv_resource_latency (cpu, slot, cycles + 18);

  fr550_reset_ccr_flags (cpu, out_ICCi_1);

  return cycles;
}

int
frvbf_model_fr550_u_branch (SIM_CPU *cpu, const IDESC *idesc,
			    int unit_num, int referenced,
			    INT in_GRi, INT in_GRj,
			    INT in_ICCi_2, INT in_FCCi_2)
{
  int cycles;
  FRV_PROFILE_STATE *ps;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* icc0-icc4 are the upper 4 fields of the CCR.  */
      if (in_ICCi_2 >= 0)
	in_ICCi_2 += 4;

      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_CCR (cpu, in_ICCi_2);
      vliw_wait_for_CCR (cpu, in_FCCi_2);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  /* When counting branches taken or not taken, don't consider branches after
     the first taken branch in a vliw insn.  */
  ps = CPU_PROFILE_STATE (cpu);
  if (! ps->vliw_branch_taken)
    {
      /* (1 << 4): The pc is the 5th element in inputs, outputs.
	 ??? can be cleaned up */
      PROFILE_DATA *p = CPU_PROFILE_DATA (cpu);
      int taken = (referenced & (1 << 4)) != 0;
      if (taken)
	{
	  ++PROFILE_MODEL_TAKEN_COUNT (p);
	  ps->vliw_branch_taken = 1;
	}
      else
	++PROFILE_MODEL_UNTAKEN_COUNT (p);
    }

  cycles = idesc->timing->units[unit_num].done;
  return cycles;
}

int
frvbf_model_fr550_u_trap (SIM_CPU *cpu, const IDESC *idesc,
			  int unit_num, int referenced,
			  INT in_GRi, INT in_GRj,
			  INT in_ICCi_2, INT in_FCCi_2)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* icc0-icc4 are the upper 4 fields of the CCR.  */
      if (in_ICCi_2 >= 0)
	in_ICCi_2 += 4;

      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_CCR (cpu, in_ICCi_2);
      vliw_wait_for_CCR (cpu, in_FCCi_2);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  cycles = idesc->timing->units[unit_num].done;
  return cycles;
}

int
frvbf_model_fr550_u_check (SIM_CPU *cpu, const IDESC *idesc,
			   int unit_num, int referenced,
			   INT in_ICCi_3, INT in_FCCi_3)
{
  /* Modelling for this unit is the same as for fr500.  */
  return frvbf_model_fr500_u_check (cpu, idesc, unit_num, referenced,
				    in_ICCi_3, in_FCCi_3);
}

int
frvbf_model_fr550_u_set_hilo (SIM_CPU *cpu, const IDESC *idesc,
			     int unit_num, int referenced,
			     INT out_GRkhi, INT out_GRklo)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a GR
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, out_GRkhi);
      vliw_wait_for_GR (cpu, out_GRklo);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, out_GRkhi);
      load_wait_for_GR (cpu, out_GRklo);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  /* GRk is available immediately to the next VLIW insn.  */
  cycles = idesc->timing->units[unit_num].done;

  return cycles;
}

int
frvbf_model_fr550_u_gr_load (SIM_CPU *cpu, const IDESC *idesc,
			     int unit_num, int referenced,
			     INT in_GRi, INT in_GRj,
			     INT out_GRk, INT out_GRdoublek)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_GR (cpu, out_GRk);
      vliw_wait_for_GRdouble (cpu, out_GRdoublek);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_GR (cpu, out_GRk);
      load_wait_for_GRdouble (cpu, out_GRdoublek);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  cycles = idesc->timing->units[unit_num].done;

  /* The latency of GRk for a load will depend on how long it takes to retrieve
     the the data from the cache or memory.  */
  update_GR_latency_for_load (cpu, out_GRk, cycles);
  update_GRdouble_latency_for_load (cpu, out_GRdoublek, cycles);

  if (CGEN_ATTR_VALUE(idesc, idesc->attrs, CGEN_INSN_NON_EXCEPTING))
    {
      /* GNER has a latency of 2 cycles.  */
      update_SPR_latency (cpu, GNER_FOR_GR (out_GRk), cycles + 2);
      update_SPR_latency (cpu, GNER_FOR_GR (out_GRdoublek), cycles + 2);
    }

  return cycles;
}

int
frvbf_model_fr550_u_gr_store (SIM_CPU *cpu, const IDESC *idesc,
			      int unit_num, int referenced,
			      INT in_GRi, INT in_GRj,
			      INT in_GRk, INT in_GRdoublek)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_GR (cpu, in_GRk);
      vliw_wait_for_GRdouble (cpu, in_GRdoublek);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_GR (cpu, in_GRk);
      load_wait_for_GRdouble (cpu, in_GRdoublek);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  /* The target register is available immediately.  */
  cycles = idesc->timing->units[unit_num].done;

  return cycles;
}

int
frvbf_model_fr550_u_fr_load (SIM_CPU *cpu, const IDESC *idesc,
			     int unit_num, int referenced,
			     INT in_GRi, INT in_GRj,
			     INT out_FRk, INT out_FRdoublek)
{
  int cycles;
  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.
	 The latency of the registers may be less than previously recorded,
	 depending on how they were used previously.
	 See Table 13-8 in the LSI.  */
      adjust_float_register_busy (cpu, -1, 1, -1, 1, out_FRk, 1);
      adjust_float_register_busy (cpu, -1, 1, -1, 1, out_FRdoublek, 2);
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_FR (cpu, out_FRk);
      vliw_wait_for_FRdouble (cpu, out_FRdoublek);
      if (CGEN_ATTR_VALUE(idesc, idesc->attrs, CGEN_INSN_NON_EXCEPTING))
	{
	  vliw_wait_for_SPR (cpu, FNER_FOR_FR (out_FRk));
	  vliw_wait_for_SPR (cpu, FNER_FOR_FR (out_FRdoublek));
	}
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_FR (cpu, out_FRk);
      load_wait_for_FRdouble (cpu, out_FRdoublek);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  cycles = idesc->timing->units[unit_num].done;

  /* The latency of FRk for a load will depend on how long it takes to retrieve
     the the data from the cache or memory.  */
  update_FR_latency_for_load (cpu, out_FRk, cycles);
  update_FRdouble_latency_for_load (cpu, out_FRdoublek, cycles);

  if (CGEN_ATTR_VALUE(idesc, idesc->attrs, CGEN_INSN_NON_EXCEPTING))
    {
      /* FNER has a latency of 3 cycles.  */
      update_SPR_latency (cpu, FNER_FOR_FR (out_FRk), cycles + 3);
      update_SPR_latency (cpu, FNER_FOR_FR (out_FRdoublek), cycles + 3);
    }

  if (out_FRk >= 0)
    set_use_is_fr_load (cpu, out_FRk);
  if (out_FRdoublek >= 0)
    {
      set_use_is_fr_load (cpu, out_FRdoublek);
      set_use_is_fr_load (cpu, out_FRdoublek + 1);
    }

  return cycles;
}

int
frvbf_model_fr550_u_fr_store (SIM_CPU *cpu, const IDESC *idesc,
			      int unit_num, int referenced,
			      INT in_GRi, INT in_GRj,
			      INT in_FRk, INT in_FRdoublek)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      adjust_float_register_busy (cpu, in_FRk, 1, -1, 1, -1, 1);
      adjust_float_register_busy (cpu, in_FRdoublek, 2, -1, 1, -1, 1);
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      vliw_wait_for_FR (cpu, in_FRk);
      vliw_wait_for_FRdouble (cpu, in_FRdoublek);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      load_wait_for_FR (cpu, in_FRk);
      load_wait_for_FRdouble (cpu, in_FRdoublek);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  /* The target register is available immediately.  */
  cycles = idesc->timing->units[unit_num].done;

  return cycles;
}

int
frvbf_model_fr550_u_ici (SIM_CPU *cpu, const IDESC *idesc,
			 int unit_num, int referenced,
			 INT in_GRi, INT in_GRj)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);
      trace_vliw_wait_cycles (cpu);
      return 0;
    }

  cycles = idesc->timing->units[unit_num].done;
  request_cache_invalidate (cpu, CPU_INSN_CACHE (cpu), cycles);
  return cycles;
}

int
frvbf_model_fr550_u_dci (SIM_CPU *cpu, const IDESC *idesc,
			 int unit_num, int referenced,
			 INT in_GRi, INT in_GRj)
{
  int cycles;

  if (model_insn == FRV_INSN_MODEL_PASS_1)
    {
      /* The entire VLIW insn must wait if there is a dependency on a register
	 which is not ready yet.  */
      vliw_wait_for_GR (cpu, in_GRi);
      vliw_wait_for_GR (cpu, in_GRj);
      handle_resource_wait (cpu);
      load_wait_for_GR (cpu, in_GRi);
      load_wait_for_GR (cpu, in_GRj);