2000-05-01 20:32:07 +00:00
|
|
|
$FreeBSD$
|
|
|
|
|
|
1994-04-29 20:42:02 +00:00
|
|
|
This file contains the changes made to W. Metzenthem's 387 FPU
|
|
|
|
|
emulator to make it work under NetBSD.
|
|
|
|
|
|
|
|
|
|
a, Changes to make it compile:
|
|
|
|
|
|
|
|
|
|
1 - Changed the #include's to get the appropriate .h files.
|
|
|
|
|
2 - Renamed .S to .s, to satisfy the kernel Makefile.
|
|
|
|
|
3 - Changed the C++ style // comments to /* */
|
|
|
|
|
4 - Changed the FPU_ORIG_EIP macro. A letter from bde included
|
|
|
|
|
in the package suggested using tf_isp for using instead
|
|
|
|
|
of the linux __orig_eip. This later turned out to interfere
|
|
|
|
|
with the user stack, so i created a separate variable, stored
|
|
|
|
|
in the i387_union.
|
|
|
|
|
5 - Changed the get_fs_.. put_fs_.. fns to fubyte,fuword,subyte,
|
|
|
|
|
suword.
|
|
|
|
|
6 - Removed the verify_area fns. I don't really know what they do,
|
|
|
|
|
i suppose they verify access to memory. The sufu routines
|
|
|
|
|
should do this.
|
|
|
|
|
|
|
|
|
|
b, Changes to make it work:
|
|
|
|
|
|
|
|
|
|
1 - Made math_emulate() to return 0 when successful, so trap() won't
|
|
|
|
|
try to generate a signal.
|
|
|
|
|
2 - Changed the size of the save87 struct in /sys/arch/i387/include/
|
|
|
|
|
npx.h to accomodate the i387_union.
|
|
|
|
|
|
|
|
|
|
d, Other changes:
|
|
|
|
|
|
|
|
|
|
1 - Removed obsolate and/or linux specific stuff.
|
|
|
|
|
2 - Changed the RE_ENTRANT_CHECK_[ON|OFF] macro to
|
|
|
|
|
REENTRANT_CHECK([ON|OFF]) so indent can grok it.
|
|
|
|
|
3 - Re-indented to Berkeley style.
|
|
|
|
|
4 - Limited max no of lookaheads. LOOKAHEAD_LIMIT in fpu_entry.c
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Szabolcs Szigeti (pink@fsz.bme.hu)
|
