diff options
Diffstat (limited to 'sim/m32r')
| -rw-r--r-- | sim/m32r/mloop2.in | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/sim/m32r/mloop2.in b/sim/m32r/mloop2.in new file mode 100644 index 0000000..bb9b0b2 --- /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 |