old-cross-binutils/sim/mips
Gavin Romig-Koch b637f306ba tx19 and related necessary changes.
* config.sub: Add tx19/r1900.
	* sim/mips/configure.in, sim/mips/gencode: Add tx19/r1900.
	* gcc/config.sub, gcc/configure: Add tx19/r1900.
	* gcc/config/mips/r1900.h, config/mips/t-r1900: New.
	* gas/config/tc-mips.c: Add tx19/r1900.

	* gcc/config/mips/mips.c: Don't build 16 bit to 32 bit stubs for
	TARGET_SOFT_FLOAT.

	* config.sub: Add "marketing-names" patch.
	* gcc/config.sub: Add "marketing-names" patch.

	* gcc/configure: Change "as" link from "../gas/as.new" to "../gas/as-new";
	Same for "ld" link.
1997-09-07 20:33:22 +00:00
..
.Sanitize Graft sim/common event and other code onto the mips simulator. 1997-05-19 13:30:30 +00:00
ChangeLog tx19 and related necessary changes. 1997-09-07 20:33:22 +00:00
config.in Get configure to define RETSIGTYPE 1997-04-07 05:58:59 +00:00
configure * configure: Regenerated to track ../common/aclocal.m4 changes. 1997-09-05 00:42:05 +00:00
configure.in tx19 and related necessary changes. 1997-09-07 20:33:22 +00:00
gencode.c tx19 and related necessary changes. 1997-09-07 20:33:22 +00:00
interp.c Add ABFD argument to sim_create_inferior. Document. 1997-08-27 04:44:41 +00:00
Makefile.in Add ABFD argument to sim_create_inferior. Document. 1997-08-27 04:44:41 +00:00
README.Cygnus Initial check-in of the MIPS simulator. Work still needs to be done on 1995-11-08 15:44:38 +00:00
support.h Add r5900 1997-02-11 13:26:34 +00:00
tconfig.in * Makefile.in: Delete stuff moved to ../common/Make-common.in. 1996-11-20 10:00:42 +00:00

> 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