Rework the way kernel include files are installed. In the new method,
as with user-land programs, include files are installed by each directory
in the tree that has includes to install. (This allows more flexibility
as to what gets installed, makes 'partial installs' easier, and gives us
more options as to which machines' includes get installed at any given
time.) The old SYS_INCLUDES={symlinks,copies} behaviours are _both_
still supported, though at least one bug in the 'symlinks' case is
fixed by this change. Include files can't be build before installation,
so directories that have includes as targets (e.g. dev/pci) have to move
those targets into a different Makefile.

remove double t from targeted, add missing r to arbitrary
And fix few more typos along the way in comments and man pages.

Make comments are not C comments - use # instead of /* ... */

branches: 1.2.72;
look for the m680[2346]0 options in the opt_m68k_arch.h and set them
appropriately in the kernel config, if not already set.

restores the settings before the M680x0 options became _KERNEL_OPT
options. tested by myself and mhitch.

branches: 1.1.4; 1.1.6; 1.1.8; 1.1.10;
Abstract out setting of '-m680X0' based on -DM68020, -DM68030,
-DM68040, and -DM68060 into sys/arch/m68k/Makefile.cmachflags and
include from both atari and amiga. Other m68k ports which build
kernels that support multiple CPU types can also switch across to
this.

Make the mac68k 'tags' target work.

branches: 1.2.60; 1.2.98;
(mostly) fix kernel tags support. from Frederick Bruckman in pr-6445.

branches: 1.1.2;
Common stuff, like mips/Makefile.inc.

make it clean after itself, use standard rules files

branches: 1.10.38; 1.10.48; 1.10.54;
Adapt to changes in m68k/060sp/asm2gas script: pass SED=${TOOL_SED:Q}
instead of TOOL_SED=${TOOL_SED:Q} in the environment.

Use "${TOOL_SED}" instead of just "sed" in sys/arch/m68k/060sp/asm2gas.

branches: 1.8.74;
merge ktrace-lwp.

Use ${HOST_SH} instead of `sh'.

If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH;
Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.

branches: 1.6.28;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.5.8;
Generate the MIT-assembler-format files statically. They nearly never change,
and if so, should be generated via the new Makefile and committed, too.

Build the 68060 support package in the kernel build dir.
XXX PCB_ONFAULT is still hardwired to 64 in netbsd060sp.S.

branches: 1.3.10;
Add '-I${.CURDIR} ${.CURDIR}/' before netbsd.S to compile it with
object dirs.

Now that our as pretends to understand the M68060 cpu, use -m68060 instead
of -m68040 to avoid confusion.

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

Prepare for the m68k ELF transition:
o Add register prefixes for the benefit of gas.new
o Wrap global symbols in the m68k/asm.h macros
o Fix `#' comments so the source can be run through the C pre-processor

branches: 1.5.8; 1.5.18;
Generate the MIT-assembler-format files statically. They nearly never change,
and if so, should be generated via the new Makefile and committed, too.

Help crosscompiling, by as -> $(AS). Define AS?= as in the calling
Makefile.$(ARCH)es. Will hopefully fix the (remaining) part or pr4010.

Build the 68060 support package in the kernel build dir.
XXX PCB_ONFAULT is still hardwired to 64 in netbsd060sp.S.

branches: 1.2.4;
Add .MAKE to the .OBJDIR hacks, so they work with `make -n'.

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

fix various typos, mainly in comments.

Move to 2 clause TNF license

branches: 1.5.130; 1.5.132; 1.5.134;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.4.8;
Update.

Fix Copyright dates

Assign my files to The NetBSD Foundation, Inc.

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

Remove clause 3 and 4 from TNF licenses

branches: 1.8.2; 1.8.4;
Synchronise the two asm2gas scripts in sys/arch/m68k/060sp and
sys/arch/m68k/fpsp:

* The fpsp/asm2gas sed script previously hardcoded the fact that
registers needed a '%' prefix, and the 060sp/asm2gas sed scrip
previously did not have rules related to inserting '%' before register
names. Now, both scripts have the same rules, but the rules are
parapeterised to use "$P", which is set to '' or '%' as appropriate.

* Some other minor changes to the sed scripts.

The new asm2gas scripts have been verified to produce identical output
to the old asm2gas scripts, for all inputs in 060sp/dist/*.sa and
fpsp/*.sa, except for some differences inside comments.

Thanks to Izumi Tsutsui for suggesting that these scripts should be
synchronised.

Use "${TOOL_SED}" instead of just "sed" in sys/arch/m68k/060sp/asm2gas.

branches: 1.6.148;
Assign copyrights to TNF.

Make copyright notices with my name consistent.

- only convert real hex constants to 0x form, not $NetBSD...
- protect comment lines from future uses of CPP by putting a | in front

branches: 1.3.12;
new RCS ID format.

Simplify, speed it up, and do the right thing for floating point constants.

Port to NetBSD, with some bug fixes and minor performance tweaks.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Prepare for the m68k ELF transition:
o Add register prefixes for the benefit of gas.new
o Wrap global symbols in the m68k/asm.h macros
o Fix `#' comments so the source can be run through the C pre-processor

branches: 1.2.30; 1.2.40;
Naive translation of text to assembler had caused some assembler syntax
errors. Fixed them. Thanks to Bernd Ernesti for the early report.

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

branches: 1.1.2;
Build the 68060 support package in the kernel build dir.
XXX PCB_ONFAULT is still hardwired to 64 in netbsd060sp.S.

Prepare for the m68k ELF transition:
o Add register prefixes for the benefit of gas.new
o Wrap global symbols in the m68k/asm.h macros
o Fix `#' comments so the source can be run through the C pre-processor

branches: 1.4.8; 1.4.18;
Generate the MIT-assembler-format files statically. They nearly never change,
and if so, should be generated via the new Makefile and committed, too.

Align some comments, so that I'll be able to track changes better.

fix typo

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

Fix doubled 'the's in comments.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Generate the MIT-assembler-format files statically. They nearly never change,
and if so, should be generated via the new Makefile and committed, too.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

Fix doubled 'the's in comments.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

s/Instrcution/Instruction/ in comment.

Prepare for the m68k ELF transition:
o Add register prefixes for the benefit of gas.new
o Wrap global symbols in the m68k/asm.h macros
o Fix `#' comments so the source can be run through the C pre-processor

branches: 1.3.20; 1.3.30;
Align some comments, so that I'll be able to track changes better.

fix typo

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Generate the MIT-assembler-format files statically. They nearly never change,
and if so, should be generated via the new Makefile and committed, too.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

Fix doubled 'the's in comments.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.14;
RCSID Police.

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Forgot to remove this yesterday... this was renamed to netbsd060sp.S.

In the OS glue code for the 060SP, replace the copyin()/copyout() glue by
movs.
XXX As our CPP seems to hate the 060SP, I couldn't use assym.h for the
PCB_ONFAULT definition, but had to hardwire 64 in the code. This needs
to be fixed ASAP, and will be done in the upcoming reorganization of
the 060sp Makefiles.

branches: 1.3.4;
Add support for T-racing of emulated instructions. (Yes, gdb uses this.)

The recent buserr handler cleanup in the Amiga locore.s made the label
_buserr point to the 68020/030 buserr code _only_. This has broken access
error handling in the 060 support code.
This is repaired by jumping to _buserr60 from the 060SP, and by providing
a _buserr60 label identical to the _buserr in the unchanged m68k ports
using the 68060.

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

fix a/an grammar in obvious cases

branches: 1.7.6; 1.7.248;
Use PCB_ONFAULT instead of hardcoding a value of 64. This is fine
for Amiga and Atari but not for other m68k ports which use m68k/pcb.h.

branches: 1.6.4;
Prepare for the m68k ELF transition:
o Add register prefixes for the benefit of gas.new
o Wrap global symbols in the m68k/asm.h macros
o Fix `#' comments so the source can be run through the C pre-processor

branches: 1.5.8; 1.5.18;
Remove redundant code (leftover from editing).

branches: 1.4.2;
In the OS glue code for the 060SP, replace the copyin()/copyout() glue by
movs.
XXX As our CPP seems to hate the 060SP, I couldn't use assym.h for the
PCB_ONFAULT definition, but had to hardwire 64 in the code. This needs
to be fixed ASAP, and will be done in the upcoming reorganization of
the 060sp Makefiles.

Add support for T-racing of emulated instructions. (Yes, gdb uses this.)

The recent buserr handler cleanup in the Amiga locore.s made the label
_buserr point to the 68020/030 buserr code _only_. This has broken access
error handling in the 060 support code.
This is repaired by jumping to _buserr60 from the 060SP, and by providing
a _buserr60 label identical to the _buserr in the unchanged m68k ports
using the 68060.

Initial commit of the machine independend part of the glue code for
the 68060 software support package.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Generate the MIT-assembler-format files statically. They nearly never change,
and if so, should be generated via the new Makefile and committed, too.

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

Fix doubled 'the's in comments.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.2.30;
RCS ID police

branches: 1.1.1;
Initial revision

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

s/MEMEORY/MEMORY/ in comment.

"Utilize" has exactly the same meaning as "use," but it is more
difficult to read and understand. Most manuals of English style
therefore say that you should use "use".

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

fix typos

branches: 1.1.6; 1.1.46; 1.1.84; 1.1.88; 1.1.90;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

Fix typo in comment.

s/threshhold/threshold/ in comment.

merge ktrace-lwp.

becuase -> because. From Peter Postma.

branches: 1.3.2;
"Utilize" has exactly the same meaning as "use," but it is more
difficult to read and understand. Most manuals of English style
therefore say that you should use "use".

branches: 1.2.4;
Spell 'occurred' with two 'r's.

branches: 1.1.6; 1.1.8; 1.1.10;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

fix various typos in comments, mainly origional->original,
extened->extended, incomming->incoming.

Improve spelling: regsiter -> register

This change is non-functional.

Approved by <riastradh>, <pgoyette>

branches: 1.1.6; 1.1.180; 1.1.200;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

s/Instrcution/Instruction/ in comment.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

fix various typos in comments and log messages.

Fix all remaining typos, mainly in comments but also in few definitions and log messages, reported by me in PR kern/54889.
Also fixed some additional typos in comments, found on review of same files or typos.

branches: 1.3.34;
Improve spelling: regsiter -> register

This change is non-functional.

Approved by <riastradh>, <pgoyette>

branches: 1.2.8; 1.2.174; 1.2.194;
Fix various misspellings of compatible/compatibility.

branches: 1.1.6; 1.1.8;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

merge ktrace-lwp.

becuase -> because. From Peter Postma.

branches: 1.2.4; 1.2.20;
Spell 'occurred' with two 'r's.

branches: 1.1.6; 1.1.8; 1.1.10;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

branches: 1.1.6;
Move original Motorola files to the "dist" subdirectory, in response
to PR 9626 by Kris Shannon.

add a special rule to build m68k/fpu.c to avoid passing -msoft-float.
fixes GCC 6 kernel builds that use this file.

Defflag the M060SP option in one place, and make sure to include opt_m060sp.h
(and opt_fpsp.h) in the right places.

PR port-m68k/59776

branches: 1.57.4;
Make the M68K_MMU_* defines real kernel options, available in opt_m68k_arch.h.
For 68030, 68040, and 68060, infer M68K_MMU_MOTOROLA. For 68010 and 68020, it
must be an explicit option (set in std.${MACHINE} or, in the case of hp300,
inferred from the specific model option).

Bump required version (mkflagvar).

mkflagvar M68010 M68020 M68030 M68040 M68060

Make sigcode.s and sunos_sigcode.s build as their own stand-alone files.

Make compat_13_sigreturn13.s and compat_16_sigreturn14.s build as their
own stand-alone files and G/C the now-empty sigreturn.s.

Build m68k/support.s on its own; don't include it from locore.s

branches: 1.51.20;
make process_machdep.c included always since it provides register i/o used by
sys_process_getlwpstatus.c which is always included.

harmonize process_machdep.c inclusion.

G/C "MAPPECOPY". It is the deadest of wood, and never actually worked in
NetBSD.

Remove compat_svr4 and compat_svr4_32, as discussed on tech-kern@ recently,
but also as discussed several times in the past.

branches: 1.47.58; 1.47.60;
Add m68k MD cpu_in_cksum.c.
Based on sys/netinet/cpu_in_cksum.c but just modified
to use traditional MD m68k/oc_cksum.s.

Makes ~5% improvements of ttcp(1) xfer rates on ATARI TT030 + SMC_TT.

fix PR 6724 - convert m68k options to defflag's. this means that
M680[12346] are now available from opt_m68k_arch.h. FPSP meantioned
in the PR has already been fixed, and i could not find any more.

i built these kernels to ensure i did not break their builds:

amiga: GENERIC DRACO
atari: HADES FALCON MILAN-PCIIDE
mac68k: GENERIC
sun2: GENERIC
sun3: GENERIC GENERIC3X
cesfic: attempted GENERIC, does not build due to lack of machine/bus.h
hp300: GENERIC
luna68k: GENERIC
mvme68k: GENERIC
news68k: GENERIC
next68k: GENERIC
x68k: GENERIC

branches: 1.45.6; 1.45.8;
Make the emulations, exec formats, coredump, NFS, and the NFS server
into modules. By and large this commit:

- shuffles header files and ifdefs
- splits code out where necessary to be modular
- adds module glue for each of the components
- adds/replaces hooks for things that can be installed at runtime

branches: 1.44.6; 1.44.10; 1.44.16; 1.44.18;
Refactor in_cksum/in4_cksum/in6_cksum implementations:
- All three functions are included in the kernel by default.
They call a backend function cpu_in_cksum after possibly
computing the checksum of the pseudo header.
- cpu_in_cksum is the core to implement the one-complement sum.
The default implementation is moderate fast on most platforms
and provides a 32bit accumulator with 16bit addends for L32 platforms
and a 64bit accumulator with 32bit addends for L64 platforms.
It handles edge cases like very large mbuf chains (could happen with
native IPv6 in the future) and provides a good base for new native
implementations.
- Modify i386 and amd64 assembly to use the new interface.

This disables the MD implementations on !x86 until the conversion is
done. For Alpha, the portable version is faster.

Add MODULAR option. Include kernel linker stuff if MODULAR.

Remove COMPAT_HPUX.

branches: 1.41.2; 1.41.8;
Merge the ppcoea-renovation branch to HEAD.

This branch was a major cleanup and rototill of many of the various OEA
cpu based PPC ports that focused on sharing as much code as possible
between the various ports to eliminate near-identical copies of files in
every tree. Additionally there is a new PIC system that unifies the
interface to interrupt code for all different OEA ppc arches. The work
for this branch was done by a variety of people, too long to list here.

TODO:
bebox still needs work to complete the transition to -renovation.
ofppc still needs a bunch of work, which I will be looking at.
ev64260 still needs to be renovated
amigappc was not attempted.

NOTES:
pmppc was removed as an arch, and moved to a evbppc target.

branches: 1.40.10;
Remove unused m68k/bcopy.s.
(src/common/lib/libc/arch/m68k/string/bcopy.S in libkern is enough)

Remove netns stuff.

branches: 1.38.6; 1.38.8; 1.38.14;
Add lock stubs for m68k. Amiga builds and runs now.

merge ktrace-lwp.

branches: 1.36.16;
SA_SIGINFO support for m68k

branches: 1.35.2;
Move (and unify) PMAP_DEBUG and FPU_EMULATE here - it is tested in
shared files.

Merge the nathanw_sa branch.

m68k syscall rototill:

- Switch all m68k-based ports over to __HAVE_SYSCALL_INTERN.
- Add systrace glue.
- Define struct mdproc in <m68k/proc.h> instead of <machine/proc.h>.
(They were all defined exactly the same anyway, other than a couple
of the MDP_* flags.)

branches: 1.32.8;
- convert usage of "defopt" to "defflag" where the relevant option does
not support a value (e.g., it's to be used as "options FOO" instead of
"options FOO=xxx"). options that take a value were converted to
defparam recently.
- minor whitespace & formatting cleanups

cleanup:
options SPACE TAB
makeoptions TAB
psuedo-device TAB
remove trailing whitespace
replace multiple spaces -> tabs
options "FOO" -> options FOO
options "FOO=bar" -> options FOO=bar
options "FOO=\"bar\"" -> options FOO="\"bar\""

branches: 1.30.4; 1.30.8;
Unification of the m68k syscall() function.

defopt FPSP.

Switch to MI ns_cksum.c - the MD ns_cksum.c is equivalent to it
(modulo some u_intX_t vs. u_char type usage). In particular, the
MD version didn't contain any MD code.

Allow arch-specific code to specify in4_cksum() like it can specify
in_cksum().

branches: 1.26.2;
Normalize include paths.

Add COMPAT_SVR4 for m68k.

Move linux_reenter_syscall() to a common location and rename it to
reenter_syscall() - it's going to be shared with COMPAT_SVR4 and soon be
used by native code.

branches: 1.23.8;
Implement compat_13_sys_sigreturn().

Back out the defopt for M680?0. As pointed out to me, this breaks ports which
dont use the M680?0 the way Amiga, Atari, Mac68k, and X68k do. I must have
missed this in the past discussion about this project.

Move M680[2346]0 to opt_m68kcpu.h.
XXX Some explicit dependencies could be removed now from the individual
arch/$ARCH/conf/Makefile.$ARCH files, but this is still to be done.

Remove random.s.

Amiga uses the common m68k/sig_machdep.c now. Also moved its definition from
the other 68k ports' files.${port} to arch/m68k/conf/files.m68k.

add src/sys/arch/m68k/m68k/m68k_machdep.c

Add bcopy.s, copy.s, copypage.s, and regdump.c; they're common to all
m68k ports.

Add m68k/kgdb_m68k.c

branches: 1.15.2;
Build mappedcopy.c conditional on "options MAPPEDCOPY"

Pull in the COMPAT_M68K4K stuff when appropriate.

Add ns_cksum.c.

Remove ns_cksum.c (now in sys/conf/files)

new-config files list. missed this yesterday.

new RCS ID format.

Remove fpsp.U.

Remove bogon.

fix to avoid duplicate symbols w/hpfplib.

Remove copy.s. It's simply not that generic.

Add random.s.

make FPSP m68k-generic

add copy.s to files.m68k, and alphabetize files.m68k.newconf

add ddb files, and also make sure alphabetically ordered

common code

rename files files for new config/config.old naming

new RCS ID format.

Remove fpsp.U.

Remove bogon.

Remove copy.s. It's simply not that generic.

always assemble fpspnull.s

Add fpsp support. Comment out fpspnull line until I figure out how to
specify "not option" with new config. Don't need it yet, anyway.

Add random.s.

add copy.s to files.m68k, and alphabetize files.m68k.newconf

Use m68k/m68k/copy.s.

add ddb files, and also make sure alphabetically ordered

add files.m68k.newconf for the mac folks

This file is now obsolete.

Pull in the COMPAT_M68K4K stuff when appropriate.

new RCS ID format.

Remove fpsp.U.

Remove bogon.

fix to avoid duplicate symbols w/hpfplib.

Remove copy.s. It's simply not that generic.

Add random.s.

make FPSP m68k-generic

add copy.s to files.m68k, and alphabetize files.m68k.newconf

add ddb files, and also make sure alphabetically ordered

common code

Sprinkle a few VMSWAP_DEFAULT_PLAINTEXT for architectures where we do not
have any spare cpu cycles to waste (encrypted swap still could be
enabled by the admin in /etc/sysctl.conf).

branches: 1.1.2; 1.1.4; 1.1.10; 1.1.82; 1.1.86;
- add m68k/conf/std.m68k, which includes common standard options for m68k,
options EXEC_ELF32, EXEC_SCRIPTS, and CPU_IN_CKSUM for md cpu_in_cksum.c
- make all m68k ports include common arch/m68k/conf/std.m68k
from MD std.${MACHINE}

fix mainly same typos as in my previous commit but outside sys/dev/dm.

Update a list of implement/unimplement functions.

branches: 1.5.2; 1.5.12;
Update implemented/unimplemented FP functions.

Update from Ken Nakata.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Add NetBSD id string and update instructions.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Introduce the CORDIC algorithm.
o sine and cosine (e.g., FSIN, FCOS and FSINCOS instructions) is now
calculated in the CORDIC instead of Taylor expansion.
o tangent (FTAN) is not touched from a viewpoint of the code size.
o The CORDIC is applicable for hyperbolic functions (e.g., FSINH,
FCOSH, FTANH instructions), but I didn't use it because its working
range is poor.
o The CORDIC is also usable for inverse trigonometric functions,
I will commit it at next phase.
o The code size becomes a bit big. I cannot evaluate speed on m68k
for some reasons, but in test on i386 the CORDIC is approximately
100 times faster in sin/cos.

branches: 1.2.204; 1.2.214;
Add in NetBSD id string.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

u_int -> uint32_t

Remove 'register'.

branches: 1.7.12; 1.7.22;
Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.6.78; 1.6.86; 1.6.92;
merge ktrace-lwp.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.3.36;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.2.24; 1.2.26; 1.2.28;
Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

quad_t -> uint64_t

u_int -> uint32_t

Remove 'register'.

branches: 1.5.112; 1.5.122;
bare asm -> __asm

merge ktrace-lwp.

branches: 1.3.16;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

branches: 1.2.36;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.1.24; 1.1.26; 1.1.28;
Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.1.170; 1.1.178; 1.1.184;
Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Fix indent.

branches: 1.27.36;
Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.26.54;
fix indent again.
- "Second level indents are four spaces." pointed out by tsutsui@
- fold long line.

fix indent. no functional changes.

- consistently use #ifdef DEBUG_FPE and #ifdef DIAGNOSTIC
- use DPRINTF() style debug printfs
- use __func__ to print function names

KNF. No binary change.

branches: 1.22.2;
fix PR 6724 - convert m68k options to defflag's. this means that
M680[12346] are now available from opt_m68k_arch.h. FPSP meantioned
in the PR has already been fixed, and i could not find any more.

i built these kernels to ensure i did not break their builds:

amiga: GENERIC DRACO
atari: HADES FALCON MILAN-PCIIDE
mac68k: GENERIC
sun2: GENERIC
sun3: GENERIC GENERIC3X
cesfic: attempted GENERIC, does not build due to lack of machine/bus.h
hp300: GENERIC
luna68k: GENERIC
mvme68k: GENERIC
news68k: GENERIC
next68k: GENERIC
x68k: GENERIC

branches: 1.21.2; 1.21.4;
ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.18.44; 1.18.52; 1.18.58;
Don't disable EA_DIRECT in fpu_load_ea(), which seems disabled
accidentally in rev 1.11 about six years ago, otherwise
fmovel %dN,%fpN instructions cause unexpected memory access.

branches: 1.17.24; 1.17.26;
merge ktrace-lwp.

branches: 1.16.14; 1.16.16;
Uppercase CPU, plural is CPUs.

__KERNEL_RCSID()

branches: 1.14.6;
remove trailing \n in panic(). approved perry.

branches: 1.13.6;
bcopy -> memcpy

branches: 1.12.2;
Fix typo. s/extention/extension/

Don't use the frames' provided EA yet; something is wrong.

Make this actually sort-of-work for 68060 w. disabled FPU (tested), 68LC060,
and I suspect, 68LC040 and 68040V machines. Method used:

1. do NOT use the frames effective address at all
2. do NOT use the frames next instruction address, but
3. restore the "this instruction" pc into the pc field of the frame at the
beginning of the emulation, if we got a frame format 4.

TODO:
A. find the bug in the usage of the frame EA, and revert to using it.
B. find the bug in the usage of the frames next instruction address, and
consider whether it's worthwhile to use it.
C. make the emulation complete.... FEXP FETOM1, and the trigonometric functions
are missing.

Argument modreg of fpu_decode_ea() is actually an opecode.
That bug prevented awk(1) to work.

branches: 1.8.2; 1.8.10;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.7.22; 1.7.24; 1.7.26;
Eliminate fusword() prototype, as it's now in <sys/systm.h>

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

sys/types.h -> sys/param.h and remove include of stddef.h.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Remove fpu_cordit2() and atanh_table[] completely.
Since cordit1 (for trigonometric functions) and cordit2 (for
hyperbolic functions) are very similar, so I implemented both
at first, but I didn't use cordit2 after all :(

Move fpu_cordit2() to #ifdef CORDIC_BOOTSTRAP section.
This reduces ~2KB text segment.
Reported by Krister Walfridsson on tech-kern two months ago.

branches: 1.2.4; 1.2.12; 1.2.16; 1.2.20;
s/tayler/taylor/. pointed out by christos@

Introduce the CORDIC algorithm.
o sine and cosine (e.g., FSIN, FCOS and FSINCOS instructions) is now
calculated in the CORDIC instead of Taylor expansion.
o tangent (FTAN) is not touched from a viewpoint of the code size.
o The CORDIC is applicable for hyperbolic functions (e.g., FSINH,
FCOSH, FTANH instructions), but I didn't use it because its working
range is poor.
o The CORDIC is also usable for inverse trigonometric functions,
I will commit it at next phase.
o The code size becomes a bit big. I cannot evaluate speed on m68k
for some reasons, but in test on i386 the CORDIC is approximately
100 times faster in sin/cos.

indent fix in a comment.

Fix a sign when a source or destination is either (plus/minus)zero
or (plus/minus)infinity. Found by XM6i.

branches: 1.8.4;
u_int -> uint32_t

Remove 'register'.

branches: 1.6.12; 1.6.22;
Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.5.78; 1.5.86; 1.5.92;
merge ktrace-lwp.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.2.36;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.1.24; 1.1.26; 1.1.28;
Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

m68k/fpe: Avoid an illegal mod/reg before decoding it.
This also works for machines with FPU.
If the kernel defines FPU_EMULATE, even illegal FPU instructions in the real
6888x machines, the FPE will be executed by F line exception. So the FPE
must raise SIGILL appropriately for these.

m68k/fpe: Remove duplicated assignments.
These are already stored before. No functional changes intended.

m68k/fpe: Fix FTRAPcc emulation raise the correct trap.
Currently fpu_emul_type1() returns SIGFPE only if FTRAPcc's condition is met,
so this works. But I wish there was a better way..
fputest.x(0.24.10.08) about ftrapcc passed 100%.

m68k/fpe: Reimplement and simplify test_cc().
This logic was analized by Y.Sugahara (in 2016).
Finally fputest.x(0.24.10.08) about fbcc fdbcc fscc (40960 tests) passed 100%!

m68k/fpe: Two bugfixes in test_cc().
- Don't clear the exception byte in FPSR.
According to the manual, all bits except BSUN are "not affected".
- Accumulate AIOP bit always.
XXX Need to look this again later. brcc() looks to have similar one.

m68k/fpe: Several bugfixes in FDBcc and FTRAPcc emulation.
In fpu_emul_type1(),
- If test_cc() returns >0, it's an error, that is an illegal instruction in
this case. So it should just return without doing anything.
By this fix, FTRAPcc with illegal cc now causes SIGILL correctly.
- In result, branch can only be 0 or -1 after that. It makes code simple.
By this cleanup, FDBcc with illegal cc now causes SIGILL correctly.
- FTRAPcc must advance PC regardless of whether the condition is met.
(although FTRAPcc does not work at this point by anothor problem)

m68k/fpe: Fix several FMOVEM FPctl emulation.
- Fix the write order of FMOVEM FPctl,-(An).
For example, "FMOVEM FPCR/FPSR,-(An)" instruction first decrements An by
the total size (4*2 bytes), then writes FPCR and FPSR in this order.
Therefore, it's differs from "FMOVEM FPCR,-(An); FMOVEM FPSR,-(An)" sequence.
- Support multiple immediate case like "FMOVEM #imm/#imm,FPCR/FPIAR".
- Mask writes to FPSR and FPCR registers correctly.
- Support reglist=0 case too. It's not common case but makes code easier.

m68k/fpe: FMOVEM (both FPn and FPctl) must not update accrued byte in FPSR.

branches: 1.41.6;
word was changed to sval at rev 1.39, but DPRINTF values were not updated.

Fixes DEBUG_FPE enabled build for 68k FPE code.

s/opration/operation/

Overhaul the API used to fetch and store individual memory cells in
userspace. The old fetch(9) and store(9) APIs (fubyte(), fuword(),
subyte(), suword(), etc.) are retired and replaced with new ufetch(9)
and ustore(9) APIs that can return proper error codes, etc. and are
implemented consistently across all platforms. The interrupt-safe
variants are no longer supported (and several of the existing attempts
at fuswintr(), etc. were buggy and not actually interrupt-safe).

Also augmement the ucas(9) API, making it consistently available on
all plaforms, supporting uniprocessor and multiprocessor systems, even
those that do not have CAS or LL/SC primitives.

Welcome to NetBSD 8.99.37.

branches: 1.38.30;
Comment unused stuff (for documentation purposes)

branches: 1.37.4;
u_int -> uint32_t

branches: 1.36.2; 1.36.12;
Add hyperboric and trigonometric functions to m68k FPE, written by isaki@.
With these emulations (~4KB text) xeyes on XM6i works better.
Discussed with isaki@ at OSC 2011 Hiroshima.

fix indent again.
- "Second level indents are four spaces." pointed out by tsutsui@
- fold long line.

fix indent. no functional changes.

- use DPRINTF() style debug printfs
- use __func__ to print function names
- consistently use #ifdef DEBUG_FPE
- add some missing debug messages including \n in error paths

KNF, mostly indent. No binary change.

Fix botch in rev 1.28 that causes wrong results of fcmp and ftst in FPE.
fpu_upd_fpsr() should be called even in discard_result case if an emulated
instruction gets proper result without signal.

Fixes weird behavior of awk(1) seen on /etc/rc.d/postfix on XM6i and
TME emulating sun3 without 68881.

Should be pulled up to all netbsd-4 and netbsd-5 branches.

branches: 1.30.4; 1.30.6;
Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.28.2;
In fpu_emul_arith(), check lower 7 bits in word1 rather than only 6 bits
to check 040/060 FP instructions, and don't call fpu_implode() and
fpu_upd_fpsr() if no vaild emulated result is set otherwise these
functions cause NULL pointer dereference.

Fixes panics triggered by 040/060's FDADD instruction
(which has the same lower 6 bits with fscale instruction)
on 020/030 machines (even with 68881/68882) running kernels
with options FPU_EMULATE.
Problem reported by John Carr on port-sun3.

Should be pulled up to netbsd-4-0, netbsd-4 and netbsd-5.

XXX: m68k 4.0 packages binaries on ftp have this FDADD instruction.

branches: 1.27.44; 1.27.52; 1.27.54;
Make these compile with options DEBUG_FPE.

branches: 1.26.24; 1.26.26;
merge ktrace-lwp.

branches: 1.25.14; 1.25.16;
SA_SIGINFO support for m68k

__KERNEL_RCSID()

branches: 1.23.24;
conditionalize the ddb hook on DDB && DEBUG_FPE rather than DDB && DEBUG,
since that's the condition under which we include the header file that
allows it to compile.

Make this actually sort-of-work for 68060 w. disabled FPU (tested), 68LC060,
and I suspect, 68LC040 and 68040V machines. Method used:

1. do NOT use the frames effective address at all
2. do NOT use the frames next instruction address, but
3. restore the "this instruction" pc into the pc field of the frame at the
beginning of the emulation, if we got a frame format 4.

TODO:
A. find the bug in the usage of the frame EA, and revert to using it.
B. find the bug in the usage of the frames next instruction address, and
consider whether it's worthwhile to use it.
C. make the emulation complete.... FEXP FETOM1, and the trigonometric functions
are missing.

branches: 1.21.2;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.20.8; 1.20.10; 1.20.12;
defopt DDB.

Back out last change, which was a thinko.

Add ftwotox emulation, by using the fscale emulation routine (preload
destination register bit pattern with 1.0), which automatically provides
corner case handling.
Missing ftwotox emulation originally reported by Norman Mackenzie in PR 4237,
but he proposed a different implementation.

Make us pass the full ieeefp except regression test.
XXX This is probably a horrible hack, and wrong. FPU signal handling needs
to be further evaluated.

Fix my own PR port-m68k/3871, nee port-amiga/3871:
- don't erase FPSR exception bits _after_ doing most of the operations in
fpu_implode(), erase them before doing arith and store operations. This fixes
losing the DZ bit.
- create FPSR_OVFL and FPSR_UNFL bits in fpu_implode(). This showed up when
the first error was fixed.
XXX some more work needs to be done. E.g., creating OPERR together with
OVFL looks bogus, but I'm too tired know to re-check docs; and at least we
pass our own regression tests know.

include <m68k/db_machdep.h> to get the prototype for kdb_trap if DDB and
DEBUG are defined and add a cast for the second argument to the
kdb_trap call.

Work around another uninitialized variable warning

Fix warnings.

Bug fix for FSINCOS: wouldn't handle FPc == FP1 earlier.

Eliminate fusword() prototype, as it's now in <sys/systm.h>

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

The 68LC040 generates a format 4 stack frame for floating point
exceptions, which puts the address of the instruction we faulted
on in a different location. Copy it and handle as we normally would,
restoring the saved PC before returning.

The FPE should probably be reworked to take advantage of the 68LC040's
precalculated effective address, at some point.

Fix FMOVEM emulation; postincrement modes use different ordering than
predecrement modes, per 68K Programmer's Manual p. 5-88. Pointed out
by Takeshi Nakayama <takeshi@sakabe.nuie.nagoya-u.ac.jp>, verified by me.

branches: 1.6.4;
Fix "might be used uninitialized" warnings.

Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Add missing break in switch (not that it mattered 8^)

branches: 1.1.1;
Initial revision

Remove fpu_cordit2() and atanh_table[] completely.
Since cordit1 (for trigonometric functions) and cordit2 (for
hyperbolic functions) are very similar, so I implemented both
at first, but I didn't use cordit2 after all :(

Move fpu_cordit2() to #ifdef CORDIC_BOOTSTRAP section.
This reduces ~2KB text segment.
Reported by Krister Walfridsson on tech-kern two months ago.

branches: 1.24.12; 1.24.16;
Introduce the CORDIC algorithm.
o sine and cosine (e.g., FSIN, FCOS and FSINCOS instructions) is now
calculated in the CORDIC instead of Taylor expansion.
o tangent (FTAN) is not touched from a viewpoint of the code size.
o The CORDIC is applicable for hyperbolic functions (e.g., FSINH,
FCOSH, FTANH instructions), but I didn't use it because its working
range is poor.
o The CORDIC is also usable for inverse trigonometric functions,
I will commit it at next phase.
o The code size becomes a bit big. I cannot evaluate speed on m68k
for some reasons, but in test on i386 the CORDIC is approximately
100 times faster in sin/cos.

Introduce FPU_CONST_* constants to avoid a magic number.

u_int -> uint32_t

const-ify.

Remove 'register'.

branches: 1.19.2; 1.19.12;
- remove variable names from function declarations
- some KNF

Add hyperboric and trigonometric functions to m68k FPE, written by isaki@.
With these emulations (~4KB text) xeyes on XM6i works better.
Discussed with isaki@ at OSC 2011 Hiroshima.

Use static inline structure assignment for CPYFPN(). From isaki@.
Tested on XM6i.

fix indent. no functional changes.

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.14.2;
fix include path in previous

Move FPSR_ register bit definitions into their own file

branches: 1.12.78; 1.12.86; 1.12.88;
merge ktrace-lwp.

Include <sys/time.h> before <sys/signalvar.h> so that copyinout_t is
defined before it is used in the second of these.

Fixes a build problem for several of our m68k ports. I've been
waiting for a better fix, but now my "proper fix timeout" triggered.

branches: 1.10.16;
SA_SIGINFO support for m68k

branches: 1.9.8; 1.9.24;
Fix typo. s/extention/extension/

rename round() to fpu_round() to avoid a name conflict with
the "round" assembly function in FPSP when building with ELF.

fpu_emulate.h:
the fmovecr constant table has the internal format
of the constants. So, when changing the mantissa size by a
non-multiple of 32 bits, we'd have to change this table, too. As
all other code changes just chopped of the least significand
32bit word of the mantissa, we correct the mantissa size instead
to (115 - 32 == 83) bits.
fpu_fmovecr.c:
put a safety belt in, to catch the next person who doesn't know this.
fpu_int.c:
in one place, the reduction of the mantissa size was overlooked.
fpu_log.c:
as the most significand 32bit word of the mantissa was changed back to the
old format, change back the table indexing code, too.

This should fix PR 11045.

Correct comments.

branches: 1.5.2; 1.5.12;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.4.24; 1.4.26; 1.4.28;
Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Remove explicit #define of DEBUG, per PR #1931.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

exp(>11356) is +inf even if extended precision.
exp(<-11401) is 0 even if extended precision.

Fix sign of zero in case of x > -(2^18).
# By the way, I will modify this case later.

Improve the exponential and hyperbolic function's performance
10..100 times faster.
PR port-m68k/51645 from rin@ (and modified by me)

branches: 1.8.12; 1.8.16;
Terminate a loop in EXT_FRACBITS(64bits) instead of FP_NMANT(83bits).
I don't know why the mantissa of the accumulator is 83bits, but 64bits
or more are not affected.

Break a loop off to avoid a long loop even if the precision is not enough.

Implement exponential and power functions.
o FETOX .. exp(x)
o FETOXM1 .. exp(x) - 1
o FTENTOX .. 10^x
o FTWOTOX .. 2^x
At last all mathematics functions of FPE were implemented.
Thanks to Yosuke Sugahara.

branches: 1.5.2; 1.5.12;
fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.3.78; 1.3.86; 1.3.92;
merge ktrace-lwp.

__KERNEL_RCSID()

branches: 1.1.64;
Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Remove incorrect byte and word conversions from fpu_explode.
The correct operation here is arithmetic right shift, but nobody calls it.

branches: 1.15.30;
For the extended precision, the MSB of the mantissa is an integer
part, and this bit must be ignored at Infinity.
found by tests/lib/libc/stdlib/t_strtod.c::strtold_inf.

branches: 1.14.12;
u_int -> uint32_t

const-ify.

Remove 'register'.

branches: 1.11.2; 1.11.12;
fix indent. no functional changes.

ANSIfy another 1261 function definitions.
The only ones left in sys are beyond by sed script!
(or in sys/dist or sys/external)
Mostly they have function pointer parameters.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.7.78; 1.7.86; 1.7.92;
merge ktrace-lwp.

While I'm here, retire the FPE code's own copy of ieee.h.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.3.36;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.2.24; 1.2.26; 1.2.28;
Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

u_int -> uint32_t

Use the #error directive.

branches: 1.14.2; 1.14.12;
fix indent again.
- "Second level indents are four spaces." pointed out by tsutsui@
- fold long line.

fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.11.78; 1.11.86; 1.11.92;
merge ktrace-lwp.

__KERNEL_RCSID()

branches: 1.9.6;
remove trailing \n in panic(). approved perry.

branches: 1.8.4; 1.8.8;
fpu_emulate.h:
the fmovecr constant table has the internal format
of the constants. So, when changing the mantissa size by a
non-multiple of 32 bits, we'd have to change this table, too. As
all other code changes just chopped of the least significand
32bit word of the mantissa, we correct the mantissa size instead
to (115 - 32 == 83) bits.
fpu_fmovecr.c:
put a safety belt in, to catch the next person who doesn't know this.
fpu_int.c:
in one place, the reduction of the mantissa size was overlooked.
fpu_log.c:
as the most significand 32bit word of the mantissa was changed back to the
old format, change back the table indexing code, too.

This should fix PR 11045.

branches: 1.7.2; 1.7.12;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.6.22; 1.6.24; 1.6.26;
backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

sys/types.h -> sys/param.h and remove include of stddef.h.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

m68k/fpe: Avoid an illegal mod/reg before decoding it.
This also works for machines with FPU.
If the kernel defines FPU_EMULATE, even illegal FPU instructions in the real
6888x machines, the FPE will be executed by F line exception. So the FPE
must raise SIGILL appropriately for these.

branches: 1.16.72;
u_int -> uint32_t

branches: 1.15.2; 1.15.12;
fix indent again.
- "Second level indents are four spaces." pointed out by tsutsui@
- fold long line.

fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.12.78; 1.12.86; 1.12.92;
merge ktrace-lwp.

__KERNEL_RCSID()

branches: 1.10.36;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.9.8; 1.9.10; 1.9.12;
Back out last change, which was a thinko.

Add ftwotox emulation, by using the fscale emulation routine (preload
destination register bit pattern with 1.0), which automatically provides
corner case handling.
Missing ftwotox emulation originally reported by Norman Mackenzie in PR 4237,
but he proposed a different implementation.

Don't forget to set the scale variable even if we dont need to sign-extend it.
From PR 4236 by Norman Mackenzie.

branches: 1.6.10;
backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Fix "might be used uninitialized" warnings.

Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

m68k/fpe: Remove redundant code.
This was assigned before the function was called.

m68k/fpe: Check an illegal mod/reg before decoding it.
This avoids a kernel panic if an instruction has illegal mod/reg bits
like FMOVE.X FPn,#imm (Of course normally assemblers never emit these).
XXX Other instructions probably need such treatment...

m68k/fpe: Add a missing return.
FMOVE.P FPn,<ea> now raises SIGFPE. (Our FPE doesn't support .P)

branches: 1.14.72;
u_int -> uint32_t

branches: 1.13.2; 1.13.12;
fix indent again.
- "Second level indents are four spaces." pointed out by tsutsui@
- fold long line.

fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.10.44; 1.10.52; 1.10.58;
Make these compile with options DEBUG_FPE.

branches: 1.9.24; 1.9.26;
merge ktrace-lwp.

branches: 1.8.14; 1.8.16;
__KERNEL_RCSID()

branches: 1.7.36;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.6.14; 1.6.16; 1.6.18;
Fix my own PR port-m68k/3871, nee port-amiga/3871:
- don't erase FPSR exception bits _after_ doing most of the operations in
fpu_implode(), erase them before doing arith and store operations. This fixes
losing the DZ bit.
- create FPSR_OVFL and FPSR_UNFL bits in fpu_implode(). This showed up when
the first error was fixed.
XXX some more work needs to be done. E.g., creating OPERR together with
OVFL looks bogus, but I'm too tired know to re-check docs; and at least we
pass our own regression tests know.

backout previous kprintf change

printf -> kprintf, sprintf -> ksprintf

Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Fixes from Ken Nakata. Mainly renaming debug_level to fpu_debug_level.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.3.78; 1.3.86; 1.3.92;
merge ktrace-lwp.

__KERNEL_RCSID()

branches: 1.1.64;
Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Improve the exponential and hyperbolic function's performance
10..100 times faster.
PR port-m68k/51645 from rin@ (and modified by me)

branches: 1.16.6; 1.16.10;
FATANH(-0) is -0, not +0.
This bug was introduced by the mistake of my test program.
Last week, I talked about the probelm (my FATANH(-0) returns +0 ?)
by NetBSD seminar at Open Source Conference 2013 Hiroshima,
and tsutsui@ confirmed that returns -0.

branches: 1.15.4;
Support sinh(-0.0) and tanh(-0.0).

Clean up some useless codes.

Fix typo in comment.

Terminate a loop in EXT_FRACBITS(64bits) instead of FP_NMANT(83bits).
I don't know why the mantissa of the accumulator is 83bits, but 64bits
or more are not affected.

Break a loop off to avoid a long loop even if the precision is not enough.

Implement a hyperbolic arctangent (FATANH).

Introduce the CORDIC algorithm.
o sine and cosine (e.g., FSIN, FCOS and FSINCOS instructions) is now
calculated in the CORDIC instead of Taylor expansion.
o tangent (FTAN) is not touched from a viewpoint of the code size.
o The CORDIC is applicable for hyperbolic functions (e.g., FSINH,
FCOSH, FTANH instructions), but I didn't use it because its working
range is poor.
o The CORDIC is also usable for inverse trigonometric functions,
I will commit it at next phase.
o The code size becomes a bit big. I cannot evaluate speed on m68k
for some reasons, but in test on i386 the CORDIC is approximately
100 times faster in sin/cos.

Introduce FPU_CONST_* constants to avoid a magic number.

Remove about updating fpsr. It was introduced by me but obviously
duplicated with fpu_emul_arith().

branches: 1.6.2; 1.6.12;
Add hyperboric and trigonometric functions to m68k FPE, written by isaki@.
With these emulations (~4KB text) xeyes on XM6i works better.
Discussed with isaki@ at OSC 2011 Hiroshima.

fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

branches: 1.3.78; 1.3.86; 1.3.92;
merge ktrace-lwp.

__KERNEL_RCSID()

branches: 1.1.64;
Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

u_int -> uint32_t

Fix fpu_ftox().
Update not only exponential but also mantissa when an integer part
becomes 2 by rounding up. Without this fix, the extended precision
value becomes 0.0 because mantissa (including explicit integer bit)
is all-zero.

Remove 'register'.

branches: 1.12.2; 1.12.12;
fix indent. no functional changes.

Change about 4500 of the K&R function definitions to ANSI ones.
There are still about 1600 left, but they have ',' or /* ... */
in the actual variable definitions - which my awk script doesn't handle.
There are also many that need () -> (void).
(The script does handle misordered arguments.)

Remove all the __P() from sys (excluding sys/dist)
Diff checked with grep and MK1 eyeball.
i386 and amd64 GENERIC and sys still build.

branches: 1.9.78; 1.9.86; 1.9.92;
merge ktrace-lwp.

While I'm here, retire the FPE code's own copy of ieee.h.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22364, verified by myself.

__KERNEL_RCSID()

branches: 1.5.24;
rename round() to fpu_round() to avoid a name conflict with
the "round" assembly function in FPSP when building with ELF.

branches: 1.4.2;
PR 7220 from Ken Nakata:
I've fixed most (not all) m68k FPE bugs that give bogus
calculation results, esp. fsqrt instruction. Also, the internal FP
representation has been reduced from 115-bit mantissa to 67-bit
mantissa which reduced the required mantissa operation roughly by one
fourth. I've done an extensive (though not exhaustive - it's
impossible!) test on the internal routines by feeding them randomly
generated FP numbers, and found that the new code is more precise than
MC68040 FPU (it seems to have a rounding bug).

[ Only change was to keep fpu_calcea.c's name instead of renaming to
fpu_ea.c in Ken's patch. --akb ]

branches: 1.3.14; 1.3.16; 1.3.18;
Fix my own PR port-m68k/3871, nee port-amiga/3871:
- don't erase FPSR exception bits _after_ doing most of the operations in
fpu_implode(), erase them before doing arith and store operations. This fixes
losing the DZ bit.
- create FPSR_OVFL and FPSR_UNFL bits in fpu_implode(). This showed up when
the first error was fixed.
XXX some more work needs to be done. E.g., creating OPERR together with
OVFL looks bogus, but I'm too tired know to re-check docs; and at least we
pass our own regression tests know.

Update for -Wall -Wstrict-prototypes -Wmissing-prototypes -Wno-uninitialized.

Still incomplete, but much more complete FPE from Ken Nakata
<kenn@remus.rutgers.edu>. This emulator does not yet emulate
the following functions:
FSINH, FETOXM1, FTANH, FATAN, FASIN, FATANH, FSIN, FTAN,
FETOX, FTWOTOX, FTENTOX, FCOSH, FACOS, FCOS, FSINCOS
It is sufficient, however, to allow programs like df, w, and newfs,
to run to completion with correct results.
Portions of this code were based on the sparc fpe and on initial
work by gwr.

Remove 'register'.