gencode.c: Kill, Kill, Kill....
Remove last remenats of old gencode simulator.
This commit is contained in:
Andrew Cagney
parent
57791952b6
commit
554eb429e4
|
|
@ -1,74 +0,0 @@
|
|||
This directory contains two very different simulators:
|
||||
|
||||
o gencode (old)
|
||||
|
||||
Gencode.c outputs a single monolithic file that is
|
||||
#included by interp.c
|
||||
|
||||
o igen (new)
|
||||
|
||||
The *.igen files are used as inputs to ../igen/igen.
|
||||
A number of separate, fairly modula files, are created.
|
||||
|
||||
The new simulator has a number of advantages:
|
||||
|
||||
o builtin support for multi-simming (single simulator
|
||||
image supporting a number of different instruction
|
||||
set architectures).
|
||||
|
||||
o Easier maintenance. The input files are not confused
|
||||
by an intermixing with the generator code.
|
||||
|
||||
gencode continues to exist so that old architectures can be emulated.
|
||||
*.igen should be used when adding new architectures or adding
|
||||
instructions to an existing ISA.
|
||||
|
||||
Known bugs?
|
||||
|
||||
In mips.igen, the semantics for many of the instructions were created
|
||||
using code generated by gencode. Those semantic segments could be
|
||||
greatly simplified.
|
||||
|
||||
|
||||
----
|
||||
|
||||
Old README.Cygnus ...
|
||||
|
||||
> README.Cygnus
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
The following are the main reasons for constructing the simulator as a
|
||||
generator:
|
||||
|
||||
1) Avoid large fixed decode source file, with lots of #ifs controlling
|
||||
the compilation. i.e. keep the source cleaner, smaller and easier
|
||||
to parse.
|
||||
|
||||
2) Allow optimum code to be created, without run-time checks on
|
||||
instruction types. Ensure that the simulator engine only includes
|
||||
code for the architecture being targetted. e.g. This avoids
|
||||
run-time checks on ISA conformance, aswell as increasing
|
||||
throughput.
|
||||
|
||||
3) Allow updates to the instruction sets to be added quickly. Having a
|
||||
table means that the information is together, and is easier to
|
||||
manipulate. Having the table generate the engine, rather than the
|
||||
run-time parse the table gives higher performance at simulation
|
||||
time.
|
||||
|
||||
4) Keep all the similar simulation code together. i.e. have a single
|
||||
place where, for example, the addition code is held. This ensures that
|
||||
updates to the simulation are not spread over a large flat source
|
||||
file maintained by the developer.
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
|
||||
To keep the simulator simple (and to avoid the slight chance of
|
||||
mis-matched files) the manifests describing an engine, and the
|
||||
simulator engine itself, are held in the same source file.
|
||||
|
||||
This means that the engine must be included twice, with the first pass
|
||||
controlled by the SIM_MANIFESTS definition.
|
||||
|
||||
-------------------------------------------------------------------------------
|
||||
> EOF README.Cygnus
|
||||
|
|
@ -11,25 +11,6 @@ SIM_AC_OPTION_ALIGNMENT(NONSTRICT_ALIGNMENT)
|
|||
SIM_AC_OPTION_HOSTENDIAN
|
||||
SIM_AC_OPTION_WARNINGS
|
||||
|
||||
# Ensure a reasonable default simulator is constructed: (DEPRECATED)
|
||||
case "${target}" in
|
||||
# start-sanitize-tx19
|
||||
mips*tx19*) SIMCONF="-mips1 -mcpu=r1900 -mno-fp --warnings";;
|
||||
# end-sanitize-tx19
|
||||
# start-sanitize-tx49
|
||||
mips*tx49*) SIMCONF="-mips3 --warnings -mcpu=r4900";;
|
||||
# end-sanitize-tx49
|
||||
# start-sanitize-r5900
|
||||
mips64r59*-*-*) SIMCONF="-mips3 --warnings -mcpu=r5900";;
|
||||
# end-sanitize-r5900
|
||||
mips64vr41*) SIMCOMF="-mips0 -mcpu=r4100 -mgp64 --warnings" ;;
|
||||
mips64*-*-*) SIMCONF="-mips0 --warnings";;
|
||||
mips16*-*-*) SIMCONF="-mips0 --warnings";;
|
||||
mips*-*-*) SIMCONF="-mips2 --warnings";;
|
||||
*) SIMCONF="-mips0 --warnings";;
|
||||
esac
|
||||
AC_SUBST(SIMCONF)
|
||||
|
||||
# DEPRECATED
|
||||
#
|
||||
# Instead of defining a `subtarget' macro, code should be checking
|
||||
|
|
@ -135,107 +116,78 @@ SIM_AC_OPTION_SMP($mips_smp)
|
|||
#
|
||||
# Select the IGEN architecture
|
||||
#
|
||||
sim_use_gen=IGEN
|
||||
sim_gen=IGEN
|
||||
sim_igen_machine="-M mipsIV"
|
||||
sim_m16_machine="-M mips16"
|
||||
sim_igen_filter="32,64,f"
|
||||
sim_m16_filter="16"
|
||||
case "${target}" in
|
||||
# start-sanitize-tx19
|
||||
mips*tx19*) sim_default_gen=M16
|
||||
sim_use_gen=M16
|
||||
mips*tx19*) sim_gen=M16
|
||||
sim_igen_machine="-M tx19"
|
||||
sim_m16_machine="-M tx19"
|
||||
sim_igen_filter="32"
|
||||
sim_m16_filter="16"
|
||||
;;
|
||||
# end-sanitize-tx19
|
||||
mips*tx39*) sim_default_gen=IGEN
|
||||
sim_use_gen=IGEN
|
||||
mips*tx39*) sim_gen=IGEN
|
||||
sim_igen_filter="32,f"
|
||||
sim_igen_machine="-M r3900"
|
||||
;;
|
||||
# start-sanitize-r5900
|
||||
mips64r59*-*-*) sim_default_gen=IGEN
|
||||
sim_use_gen=IGEN
|
||||
mips64r59*-*-*) sim_gen=IGEN
|
||||
sim_igen_machine="-M r5900"
|
||||
;;
|
||||
# end-sanitize-r5900
|
||||
# start-sanitize-vr4320
|
||||
mips64vr4320-*-*) sim_default_gen=IGEN
|
||||
sim_use_gen=IGEN
|
||||
mips64vr4320-*-*) sim_gen=IGEN
|
||||
sim_igen_machine="-M mipsIV,vr4320 -G gen-multi-sim=vr4320"
|
||||
;;
|
||||
# end-sanitize-vr4320
|
||||
mips64vr43*-*-*) sim_default_gen=IGEN
|
||||
sim_use_gen=IGEN
|
||||
mips64vr43*-*-*) sim_gen=IGEN
|
||||
sim_igen_machine="-M mipsIV"
|
||||
# start-sanitize-vr4320
|
||||
sim_igen_machine="-M mipsIV,vr4320 -G gen-multi-sim=mipsIV"
|
||||
# end-sanitize-vr4320
|
||||
;;
|
||||
# start-sanitize-cygnus
|
||||
mips64vr54*-*-*) sim_default_gen=IGEN
|
||||
sim_use_gen=IGEN
|
||||
mips64vr54*-*-*) sim_gen=IGEN
|
||||
sim_igen_machine="-M vr5000,vr5400 -G gen-multi-sim=vr5400"
|
||||
;;
|
||||
# end-sanitize-cygnus
|
||||
mips64vr5*-*-*) sim_default_gen=IGEN
|
||||
sim_use_gen=IGEN
|
||||
mips64vr5*-*-*) sim_gen=IGEN
|
||||
sim_igen_machine="-M vr5000"
|
||||
# start-sanitize-cygnus
|
||||
sim_igen_machine="-M vr5000,vr5400 -G gen-multi-sim=vr5000"
|
||||
;;
|
||||
# end-sanitize-cygnus
|
||||
mips64vr41*) sim_default_gen=M16
|
||||
sim_use_gen=M16
|
||||
mips64vr41*) sim_gen=M16
|
||||
sim_igen_machine="-M vr4100,mips16"
|
||||
sim_m16_machine="-M vr4100,mips16"
|
||||
sim_igen_filter="32,64,f"
|
||||
sim_m16_filter="16"
|
||||
;;
|
||||
mips64*-*-*) sim_default_gen=IGEN
|
||||
sim_igen_filter="32,64,f"
|
||||
sim_use_gen=IGEN
|
||||
mips64*-*-*) sim_igen_filter="32,64,f"
|
||||
sim_gen=IGEN
|
||||
;;
|
||||
mips16*-*-*) sim_default_gen=M16
|
||||
mips16*-*-*) sim_gen=M16
|
||||
sim_igen_filter="32,64,f"
|
||||
sim_m16_filter="16"
|
||||
sim_use_gen=NO
|
||||
;;
|
||||
mips*lsi*) sim_default_gen=M16
|
||||
sim_use_gen=M16
|
||||
mips*lsi*) sim_gen=M16
|
||||
sim_igen_machine="-M mipsIII,mips16"
|
||||
sim_m16_machine="-M mips16,mipsIII"
|
||||
sim_igen_filter="32,f"
|
||||
sim_m16_filter="16"
|
||||
;;
|
||||
mips*-*-*) sim_default_gen=IGEN
|
||||
mips*-*-*) sim_gen=IGEN
|
||||
sim_igen_filter="32,f"
|
||||
sim_use_gen=IGEN
|
||||
;;
|
||||
esac
|
||||
sim_igen_flags="-F ${sim_igen_filter} ${sim_igen_machine} ${sim_igen_smp}"
|
||||
sim_m16_flags=" -F ${sim_m16_filter} ${sim_m16_machine} ${sim_igen_smp}"
|
||||
AC_SUBST(sim_igen_flags)
|
||||
AC_SUBST(sim_m16_flags)
|
||||
|
||||
|
||||
|
||||
#
|
||||
# Enable igen
|
||||
#
|
||||
AC_ARG_ENABLE(sim-igen,
|
||||
[ --enable-sim-igen=opts Enable IGEN simulator],
|
||||
[case "${enableval}" in
|
||||
yes) sim_gen="${sim_default_gen}";;
|
||||
no) sim_gen=NO;;
|
||||
16) sim_gen=M16;;
|
||||
*) AC_MSG_ERROR("Unknown value $enableval passed to --enable-sim-igen"); sim_gen="";;
|
||||
esac
|
||||
if test x"$silent" != x"yes" && test x"$sim_gen" != x""; then
|
||||
echo "Setting sim_gen = $sim_gen" 6>&1
|
||||
fi],[sim_gen="${sim_use_gen}"])dnl
|
||||
AC_SUBST(sim_gen)
|
||||
|
||||
|
||||
|
|
|
|||
4858
sim/mips/gencode.c
4858
sim/mips/gencode.c
File diff suppressed because it is too large
Load Diff
Loading…
Reference in New Issue