From: Nick Clifton <nickc@redhat.com>
Date: Fri, 12 Dec 2003 16:35:21 +0000 (+0000)
Subject: oops - forgot to add this file!
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4b09af6f19b37058f2e47df58b165b6225be3e91;p=binutils-gdb.git

oops - forgot to add this file!
---

diff --git a/sim/m32r/mloop2.in b/sim/m32r/mloop2.in
new file mode 100644
index 00000000000..bb9b0b29453
--- /dev/null
+++ b/sim/m32r/mloop2.in
@@ -0,0 +1,484 @@
+# Simulator main loop for m32r2. -*- C -*-
+# Copyright (C) 1996, 1997, 1998, 2003 Free Software Foundation, Inc.
+#
+# This file is part of GDB, the GNU debugger.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+# Syntax:
+# /bin/sh mainloop.in command
+#
+# Command is one of:
+#
+# init
+# support
+# extract-{simple,scache,pbb}
+# {full,fast}-exec-{simple,scache,pbb}
+#
+# A target need only provide a "full" version of one of simple,scache,pbb.
+# If the target wants it can also provide a fast version of same, or if
+# the slow (full featured) version is `simple', then the fast version can be
+# one of scache/pbb.
+# A target can't provide more than this.
+
+# ??? After a few more ports are done, revisit.
+# Will eventually need to machine generate a lot of this.
+
+case "x$1" in
+
+xsupport)
+
+cat <<EOF
+
+/* Emit insns to write back the results of insns executed in parallel.
+   SC points to a sufficient number of scache entries for the writeback
+   handlers.
+   SC1/ID1 is the first insn (left slot, lower address).
+   SC2/ID2 is the second insn (right slot, higher address).  */
+
+static INLINE void
+emit_par_finish (SIM_CPU *current_cpu, PCADDR pc, SCACHE *sc,
+		 SCACHE *sc1, const IDESC *id1, SCACHE *sc2, const IDESC *id2)
+{
+  ARGBUF *abuf;
+
+  abuf = &sc->argbuf;
+  id1 = id1->par_idesc;
+  abuf->fields.write.abuf = &sc1->argbuf;
+  @cpu@_fill_argbuf (current_cpu, abuf, id1, pc, 0);
+  /* no need to set trace_p,profile_p */
+#if 0 /* not currently needed for id2 since results written directly */
+  abuf = &sc[1].argbuf;
+  id2 = id2->par_idesc;
+  abuf->fields.write.abuf = &sc2->argbuf;
+  @cpu@_fill_argbuf (current_cpu, abuf, id2, pc + 2, 0);
+  /* no need to set trace_p,profile_p */
+#endif
+}
+
+static INLINE const IDESC *
+emit_16 (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
+	 SCACHE *sc, int fast_p, int parallel_p)
+{
+  ARGBUF *abuf = &sc->argbuf;
+  const IDESC *id = @cpu@_decode (current_cpu, pc, insn, insn, abuf);
+
+  if (parallel_p)
+    id = id->par_idesc;
+  @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
+  return id;
+}
+
+static INLINE const IDESC *
+emit_full16 (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, SCACHE *sc,
+	     int trace_p, int profile_p)
+{
+  const IDESC *id;
+
+  @cpu@_emit_before (current_cpu, sc, pc, 1);
+  id = emit_16 (current_cpu, pc, insn, sc + 1, 0, 0);
+  @cpu@_emit_after (current_cpu, sc + 2, pc);
+  sc[1].argbuf.trace_p = trace_p;
+  sc[1].argbuf.profile_p = profile_p;
+  return id;
+}
+
+static INLINE const IDESC *
+emit_parallel (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
+	       SCACHE *sc, int fast_p)
+{
+  const IDESC *id,*id2;
+
+  /* Emit both insns, then emit a finisher-upper.
+     We speed things up by handling the second insn serially
+     [not parallelly].  Then the writeback only has to deal
+     with the first insn.  */
+  /* ??? Revisit to handle exceptions right.  */
+
+  /* FIXME: No need to handle this parallely if second is nop.  */
+  id = emit_16 (current_cpu, pc, insn >> 16, sc, fast_p, 1);
+
+  /* Note that this can never be a cti.  No cti's go in the S pipeline.  */
+  id2 = emit_16 (current_cpu, pc + 2, insn & 0x7fff, sc + 1, fast_p, 0);
+
+  /* Set sc/snc insns notion of where to skip to.  */
+  if (IDESC_SKIP_P (id))
+    SEM_SKIP_COMPILE (current_cpu, sc, 1);
+
+  /* Emit code to finish executing the semantics
+     (write back the results).  */
+  emit_par_finish (current_cpu, pc, sc + 2, sc, id, sc + 1, id2);
+
+  return id;
+}
+
+static INLINE const IDESC *
+emit_full_parallel (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
+		    SCACHE *sc, int trace_p, int profile_p)
+{
+  const IDESC *id,*id2;
+
+  /* Emit both insns, then emit a finisher-upper.
+     We speed things up by handling the second insn serially
+     [not parallelly].  Then the writeback only has to deal
+     with the first insn.  */
+  /* ??? Revisit to handle exceptions right.  */
+
+  @cpu@_emit_before (current_cpu, sc, pc, 1);
+
+  /* FIXME: No need to handle this parallelly if second is nop.  */
+  id = emit_16 (current_cpu, pc, insn >> 16, sc + 1, 0, 1);
+  sc[1].argbuf.trace_p = trace_p;
+  sc[1].argbuf.profile_p = profile_p;
+
+  @cpu@_emit_before (current_cpu, sc + 2, pc, 0);
+
+  /* Note that this can never be a cti.  No cti's go in the S pipeline.  */
+  id2 = emit_16 (current_cpu, pc + 2, insn & 0x7fff, sc + 3, 0, 0);
+  sc[3].argbuf.trace_p = trace_p;
+  sc[3].argbuf.profile_p = profile_p;
+
+  /* Set sc/snc insns notion of where to skip to.  */
+  if (IDESC_SKIP_P (id))
+    SEM_SKIP_COMPILE (current_cpu, sc, 4);
+
+  /* Emit code to finish executing the semantics
+     (write back the results).  */
+  emit_par_finish (current_cpu, pc, sc + 4, sc + 1, id, sc + 3, id2);
+
+  @cpu@_emit_after (current_cpu, sc + 5, pc);
+
+  return id;
+}
+
+static INLINE const IDESC *
+emit_32 (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
+	 SCACHE *sc, int fast_p)
+{
+  ARGBUF *abuf = &sc->argbuf;
+  const IDESC *id = @cpu@_decode (current_cpu, pc,
+				  (USI) insn >> 16, insn, abuf);
+
+  @cpu@_fill_argbuf (current_cpu, abuf, id, pc, fast_p);
+  return id;
+}
+
+static INLINE const IDESC *
+emit_full32 (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn, SCACHE *sc,
+	     int trace_p, int profile_p)
+{
+  const IDESC *id;
+
+  @cpu@_emit_before (current_cpu, sc, pc, 1);
+  id = emit_32 (current_cpu, pc, insn, sc + 1, 0);
+  @cpu@_emit_after (current_cpu, sc + 2, pc);
+  sc[1].argbuf.trace_p = trace_p;
+  sc[1].argbuf.profile_p = profile_p;
+  return id;
+}
+
+EOF
+
+;;
+
+xinit)
+
+# Nothing needed.
+
+;;
+
+xextract-pbb)
+
+# Inputs:  current_cpu, pc, sc, max_insns, FAST_P
+# Outputs: sc, pc
+# sc must be left pointing past the last created entry.
+# pc must be left pointing past the last created entry.
+# If the pbb is terminated by a cti insn, SET_CTI_VPC(sc) must be called
+# to record the vpc of the cti insn.
+# SET_INSN_COUNT(n) must be called to record number of real insns.
+
+cat <<EOF
+{
+  const IDESC *idesc;
+  int icount = 0;
+
+  if ((pc & 3) != 0)
+    {
+      /* This occurs when single stepping and when compiling the not-taken
+	 part of conditional branches.  */
+      UHI insn = GETIMEMUHI (current_cpu, pc);
+      int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
+      int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
+      SCACHE *cti_sc; /* ??? tmp hack */
+
+      /* A parallel insn isn't allowed here, but we don't mind nops.
+	 ??? We need to wait until the insn is executed before signalling
+	 the error, for situations where such signalling is wanted.  */
+#if 0
+      if ((insn & 0x8000) != 0
+	  && (insn & 0x7fff) != 0x7000) /* parallel nops are ok */
+	sim_engine_invalid_insn (current_cpu, pc, 0);
+#endif
+
+      /* Only emit before/after handlers if necessary.  */
+      if (FAST_P || (! trace_p && ! profile_p))
+	{
+	  idesc = emit_16 (current_cpu, pc, insn & 0x7fff, sc, FAST_P, 0);
+	  cti_sc = sc;
+	  ++sc;
+	  --max_insns;
+	}
+      else
+	{
+	  idesc = emit_full16 (current_cpu, pc, insn & 0x7fff, sc,
+			       trace_p, profile_p);
+	  cti_sc = sc + 1;
+	  sc += 3;
+	  max_insns -= 3;
+	}
+      ++icount;
+      pc += 2;
+      if (IDESC_CTI_P (idesc))
+	{
+	  SET_CTI_VPC (cti_sc);
+	  goto Finish;
+	}
+    }
+
+  /* There are two copies of the compiler: full(!fast) and fast.
+     The "full" case emits before/after handlers for each insn.
+     Having two copies of this code is a tradeoff, having one copy
+     seemed a bit more difficult to read (due to constantly testing
+     FAST_P).  ??? On the other hand, with address ranges we'll want to
+     omit before/after handlers for unwanted insns.  Having separate loops
+     for FAST/!FAST avoids constantly doing the test in the loop, but
+     typically FAST_P is a constant and such tests will get optimized out.  */
+
+  if (FAST_P)
+    {
+      while (max_insns > 0)
+	{
+	  USI insn = GETIMEMUSI (current_cpu, pc);
+	  if ((SI) insn < 0)
+	    {
+	      /* 32 bit insn */
+	      idesc = emit_32 (current_cpu, pc, insn, sc, 1);
+	      ++sc;
+	      --max_insns;
+	      ++icount;
+	      pc += 4;
+	      if (IDESC_CTI_P (idesc))
+		{
+		  SET_CTI_VPC (sc - 1);
+		  break;
+		}
+	    }
+	  else
+	    {
+	      if ((insn & 0x8000) != 0) /* parallel? */
+		{
+		  /* Yep.  Here's the "interesting" [sic] part.  */
+		  idesc = emit_parallel (current_cpu, pc, insn, sc, 1);
+		  sc += 3;
+		  max_insns -= 3;
+		  icount += 2;
+		  pc += 4;
+		  if (IDESC_CTI_P (idesc))
+		    {
+		      SET_CTI_VPC (sc - 3);
+		      break;
+		    }
+		}
+	      else /* 2 serial 16 bit insns */
+		{
+		  idesc = emit_16 (current_cpu, pc, insn >> 16, sc, 1, 0);
+		  ++sc;
+		  --max_insns;
+		  ++icount;
+		  pc += 2;
+		  if (IDESC_CTI_P (idesc))
+		    {
+		      SET_CTI_VPC (sc - 1);
+		      break;
+		    }
+		  /* While we're guaranteed that there's room to extract the
+		     insn, when single stepping we can't; the pbb must stop
+		     after the first insn.  */
+		  if (max_insns == 0)
+		    break;
+		  idesc = emit_16 (current_cpu, pc, insn & 0x7fff, sc, 1, 0);
+		  ++sc;
+		  --max_insns;
+		  ++icount;
+		  pc += 2;
+		  if (IDESC_CTI_P (idesc))
+		    {
+		      SET_CTI_VPC (sc - 1);
+		      break;
+		    }
+		}
+	    }
+	}
+    }
+  else /* ! FAST_P */
+    {
+      while (max_insns > 0)
+	{
+	  USI insn = GETIMEMUSI (current_cpu, pc);
+	  int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
+	  int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
+	  SCACHE *cti_sc; /* ??? tmp hack */
+	  if ((SI) insn < 0)
+	    {
+	      /* 32 bit insn
+		 Only emit before/after handlers if necessary.  */
+	      if (trace_p || profile_p)
+		{
+		  idesc = emit_full32 (current_cpu, pc, insn, sc,
+				       trace_p, profile_p);
+		  cti_sc = sc + 1;
+		  sc += 3;
+		  max_insns -= 3;
+		}
+	      else
+		{
+		  idesc = emit_32 (current_cpu, pc, insn, sc, 0);
+		  cti_sc = sc;
+		  ++sc;
+		  --max_insns;
+		}
+	      ++icount;
+	      pc += 4;
+	      if (IDESC_CTI_P (idesc))
+		{
+		  SET_CTI_VPC (cti_sc);
+		  break;
+		}
+	    }
+	  else
+	    {
+	      if ((insn & 0x8000) != 0) /* parallel? */
+		{
+		  /* Yep.  Here's the "interesting" [sic] part.
+		     Only emit before/after handlers if necessary.  */
+		  if (trace_p || profile_p)
+		    {
+		      idesc = emit_full_parallel (current_cpu, pc, insn, sc,
+						  trace_p, profile_p);
+		      cti_sc = sc + 1;
+		      sc += 6;
+		      max_insns -= 6;
+		    }
+		  else
+		    {
+		      idesc = emit_parallel (current_cpu, pc, insn, sc, 0);
+		      cti_sc = sc;
+		      sc += 3;
+		      max_insns -= 3;
+		    }
+		  icount += 2;
+		  pc += 4;
+		  if (IDESC_CTI_P (idesc))
+		    {
+		      SET_CTI_VPC (cti_sc);
+		      break;
+		    }
+		}
+	      else /* 2 serial 16 bit insns */
+		{
+		  /* Only emit before/after handlers if necessary.  */
+		  if (trace_p || profile_p)
+		    {
+		      idesc = emit_full16 (current_cpu, pc, insn >> 16, sc,
+					   trace_p, profile_p);
+		      cti_sc = sc + 1;
+		      sc += 3;
+		      max_insns -= 3;
+		    }
+		  else
+		    {
+		      idesc = emit_16 (current_cpu, pc, insn >> 16, sc, 0, 0);
+		      cti_sc = sc;
+		      ++sc;
+		      --max_insns;
+		    }
+		  ++icount;
+		  pc += 2;
+		  if (IDESC_CTI_P (idesc))
+		    {
+		      SET_CTI_VPC (cti_sc);
+		      break;
+		    }
+		  /* While we're guaranteed that there's room to extract the
+		     insn, when single stepping we can't; the pbb must stop
+		     after the first insn.  */
+		  if (max_insns <= 0)
+		    break;
+		  /* Use the same trace/profile address for the 2nd insn.
+		     Saves us having to compute it and they come in pairs
+		     anyway (e.g. can never branch to the 2nd insn).  */
+		  if (trace_p || profile_p)
+		    {
+		      idesc = emit_full16 (current_cpu, pc, insn & 0x7fff, sc,
+					   trace_p, profile_p);
+		      cti_sc = sc + 1;
+		      sc += 3;
+		      max_insns -= 3;
+		    }
+		  else
+		    {
+		      idesc = emit_16 (current_cpu, pc, insn & 0x7fff, sc, 0, 0);
+		      cti_sc = sc;
+		      ++sc;
+		      --max_insns;
+		    }
+		  ++icount;
+		  pc += 2;
+		  if (IDESC_CTI_P (idesc))
+		    {
+		      SET_CTI_VPC (cti_sc);
+		      break;
+		    }
+		}
+	    }
+	}
+    }
+
+ Finish:
+  SET_INSN_COUNT (icount);
+}
+EOF
+
+;;
+
+xfull-exec-pbb)
+
+# Inputs: current_cpu, vpc, FAST_P
+# Outputs: vpc
+# vpc is the virtual program counter.
+
+cat <<EOF
+#define DEFINE_SWITCH
+#include "sem2-switch.c"
+EOF
+
+;;
+
+*)
+  echo "Invalid argument to mainloop.in: $1" >&2
+  exit 1
+  ;;
+
+esac