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-rw-r--r--sim/i960/mloop.in301
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diff --git a/sim/i960/mloop.in b/sim/i960/mloop.in
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--- a/sim/i960/mloop.in
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-# Simulator main loop for i960. -*- C -*-
-# Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
-#
-# This file is part of the GNU Simulators.
-#
-# 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.
-# It can't provide more than this, however for illustration's sake the M32R
-# port provides examples of all.
-
-# ??? 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
-
-/*static INLINE*/ const IDESC *
-extract32 (SIM_CPU *current_cpu, PCADDR pc, CGEN_INSN_INT insn,
- ARGBUF *abuf, int fast_p)
-{
- /* ??? wilson, instructions are 32 bits. */
- const IDESC *d = @cpu@_decode (current_cpu, pc, (USI) insn, abuf);
- @cpu@_fill_argbuf (current_cpu, abuf, d, pc, fast_p);
- if (! fast_p)
- {
- int trace_p = PC_IN_TRACE_RANGE_P (current_cpu, pc);
- int profile_p = PC_IN_PROFILE_RANGE_P (current_cpu, pc);
- @cpu@_fill_argbuf_tp (current_cpu, abuf, trace_p, profile_p);
- }
- return d;
-}
-
-#if 0
-/*static INLINE*/ const IDESC *
-/* ??? wilson, Some instructions are 64 bits. */
-extract64 (SIM_CPU *current_cpu, PCADDR pc, insn_t insn,
- ARGBUF *abuf, int fast_p)
-{
- const IDESC *d = @cpu@_decode (current_cpu, pc, (UDI) insn >> 32, abuf);
- SEM_SET_CODE (abuf, d, fast_p);
- abuf->idesc = d;
- abuf->addr = pc;
- return d;
-}
-#endif
-
-static INLINE SEM_PC
-execute (SIM_CPU *current_cpu, SCACHE *sc, int fast_p)
-{
- SEM_PC vpc;
-
- if (fast_p)
- {
-#if ! WITH_SEM_SWITCH_FAST
-#if WITH_SCACHE
- vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, sc);
-#else
- vpc = (*sc->argbuf.semantic.sem_fast) (current_cpu, &sc->argbuf);
-#endif
-#else
- abort ();
-#endif /* WITH_SEM_SWITCH_FAST */
- }
- else
- {
-#if ! WITH_SEM_SWITCH_FULL
- ARGBUF *abuf = &sc->argbuf;
- const IDESC *idesc = abuf->idesc;
- const CGEN_INSN *insn = idesc->idata;
-#if WITH_SCACHE_PBB
- int virtual_p = CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_VIRTUAL);
-#else
- int virtual_p = 0;
-#endif
-
- if (! virtual_p)
- {
- /* FIXME: call x-before */
- if (ARGBUF_PROFILE_P (abuf))
- PROFILE_COUNT_INSN (current_cpu, abuf->addr, idesc->num);
- /* FIXME: Later make cover macros: PROFILE_INSN_{INIT,FINI}. */
- if (PROFILE_MODEL_P (current_cpu))
- @cpu@_model_insn_before (current_cpu, 1 /*first_p*/);
- TRACE_INSN_INIT (current_cpu, abuf, 1);
- TRACE_INSN (current_cpu, insn,
- (const struct argbuf *) abuf, abuf->addr);
- }
-#if WITH_SCACHE
- vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, sc);
-#else
- vpc = (*sc->argbuf.semantic.sem_full) (current_cpu, abuf);
-#endif
- if (! virtual_p)
- {
- /* FIXME: call x-after */
- if (PROFILE_MODEL_P (current_cpu))
- {
- int cycles;
-
- cycles = (*idesc->timing->model_fn) (current_cpu, sc);
- @cpu@_model_insn_after (current_cpu, 1 /*last_p*/, cycles);
- }
- TRACE_INSN_FINI (current_cpu, abuf, 1);
- }
-#else
- abort ();
-#endif /* WITH_SEM_SWITCH_FULL */
- }
-
- return vpc;
-}
-
-EOF
-
-;;
-
-xinit)
-
-cat <<EOF
-/*xxxinit*/
-EOF
-
-;;
-
-xextract-simple | xextract-scache)
-
-cat <<EOF
-{
- if ((pc & 3) != 0)
- {
- abort ();
-#if 0
- /* This only occurs when single stepping.
- The test is unnecessary otherwise, but the cost is teensy,
- compared with decoding/extraction. */
- UHI insn = GETIMEMUHI (current_cpu, pc);
- extract16 (current_cpu, pc, insn & 0x7fff, sc, FAST_P);
-#endif
- }
- else
- {
- USI insn = GETIMEMUSI (current_cpu, pc);
- /* ??? wilson, insns are 32 bits, unless MEMB with displacement, which
- has high bit set, bit 12 set, and mode of 5, 12, 13, 14, or 15. */
- if (((SI) insn > 0)
- || ! (((insn & 0x3000) == 0x3000)
- || ((insn & 0x3C00) == 0x1400)))
- {
- extract32 (current_cpu, pc, insn, sc, FAST_P);
- }
- else
- {
- UDI llinsn = (((UDI) insn << 32) || GETIMEMUSI (current_cpu, pc+4));
- extract64 (current_cpu, pc, llinsn, sc, FAST_P);
- }
- }
-}
-EOF
-
-;;
-
-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)
- {
- abort ();
-#if 0
- /* This only occurs when single stepping.
- The test is unnecessary otherwise, but the cost is teensy,
- compared with decoding/extraction. */
- UHI insn = GETIMEMUHI (current_cpu, pc);
- idesc = extract16 (current_cpu, pc, insn & 0x7fff, &sc->argbuf, FAST_P);
- ++sc;
- --max_insns;
- ++icount;
- pc += 2;
- if (IDESC_CTI_P (idesc))
- {
- SET_CTI_VPC (sc - 1);
- goto Finish;
- }
-#endif
- }
-
- while (max_insns > 0)
- {
- USI insn = GETIMEMUSI (current_cpu, pc);
-#if 0
- /* ??? wilson, insns are 32 bits, unless MEMB with displacement, which
- has high bit set, bit 12 set, and mode of 5, 12, 13, 14, or 15. */
- if (((SI) insn > 0)
- || ! (((insn & 0x3000) == 0x3000)
- || ((insn & 0x3C00) == 0x1400)))
- {
- idesc = extract32 (current_cpu, pc, insn, &sc->argbuf, FAST_P);
- ++sc;
- --max_insns;
- ++icount;
- pc += 4;
- if (IDESC_CTI_P (idesc))
- {
- SET_CTI_VPC (sc - 1);
- break;
- }
- }
- else
- {
- idesc = extract64 (current_cpu, pc, insn, &sc->argbuf, FAST_P);
- ++sc;
- --max_insns;
- ++icount;
- pc += 8;
- if (IDESC_CTI_P (idesc))
- {
- SET_CTI_VPC (sc - 1);
- break;
- }
- }
-#else
- idesc = extract32 (current_cpu, pc, insn, &sc->argbuf, FAST_P);
- ++sc;
- --max_insns;
- ++icount;
- pc += idesc->length;
- if (IDESC_CTI_P (idesc))
- {
- SET_CTI_VPC (sc - 1);
- break;
- }
- }
-#endif
- Finish:
- SET_INSN_COUNT (icount);
-}
-EOF
-
-;;
-
-xfull-exec-* | xfast-exec-*)
-
-# Inputs: current_cpu, vpc, FAST_P
-# Outputs: vpc
-# vpc is the virtual program counter.
-
-cat <<EOF
-#if (! FAST_P && WITH_SEM_SWITCH_FULL) || (FAST_P && WITH_SEM_SWITCH_FAST)
-#define DEFINE_SWITCH
-#include "sem-switch.c"
-#else
- vpc = execute (current_cpu, vpc, FAST_P);
-#endif
-EOF
-
-;;
-
-*)
- echo "Invalid argument to mainloop.in: $1" >&2
- exit 1
- ;;
-
-esac
generated by cgit v1.1 at 2024-11-14 19:26:51 +0000