aad01611e7
Move UCB-licensed code from 4-clause to 3-clause licence.
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Patches provided by Joel Baker in PR 22364, verified by myself.
2003-08-07 16:26:28 +00:00
26ab868e68
Merge Bill Sommerfeld's i386 MP branch. This code has some known
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caveats, but works quite well in a lot of MP cases, and all
UP cases that I have tested. Parts of this will hopefully be
reworked in the not-too-distant future.
2002-10-01 12:56:36 +00:00
518ad20222
Upon further reading of the manual, don't save the MXCSR-at-last-exception.
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Its status bits are sticky, and unaffacted by FNINIT.
2001-08-03 01:46:08 +00:00
099e93139b
In setregs(), initialize the process's MXCSR to the reset-default
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value as documented in the IA-32 Instruction Set Reference (in the
description of the LDMXCSR insn).
2001-08-03 01:24:39 +00:00
f72ee0a9c6
Remember the MXCSR at last-exception the way we do the FPU SW/TW.
2001-08-03 01:11:49 +00:00
99a7f640fe
Add support for saving/restoring SSE/SSE2 state using FXSAVE/FXRSTOR.
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Reviewed by Frank.
2001-08-02 21:04:43 +00:00
d95840263e
add prototypes for the assembly functions that moved to locore.s
1999-01-26 14:25:02 +00:00
d664bf39b8
Add some comments about what the control words do.
1998-01-24 14:00:36 +00:00
a963fe5864
Store the initial NPX control word appropriate for the emulation in the saved
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FPU state, and use it when initializing the FPU on demand.
1998-01-24 13:19:46 +00:00
022ee8f7fe
new RCS ID format.
1994-10-27 04:14:23 +00:00
62db8972b1
Updated bde's comments wrt. i387 control word settings so that they
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describe NetBSD, rather than 386BSD 0.1.
Removed 386BSD and BDE control word constants, since we don't need and
will never use them. However, The iBCS control word constant is kept,
since we might want to use it in the iBCS binary compatibility code.
1994-09-22 00:37:13 +00:00
2a51c00a70
FPU control word of 0x137f doesn't work well in "real" world applications
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so I've changed it to 0x127f. 64 bit precision causes errors in paranoia
and our math library, changing to 53 bit precision solves these problems.
I've been told that long double support in Gcc 2.5 requires 64 bit mode,
so a comprehensive FP strategy (compiler, library, FPU, emulator) will
have to be addressed in the future.
1994-01-25 19:58:30 +00:00
c4b7945dca
My previous checkin didn't really change the FPU Exception Mask -- it was
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trapped inside an #ifdef -- this commit changes it as I had originally
intended.
1994-01-17 18:10:01 +00:00
ceb7f9888d
Change default NetBSD NPX control word to 0x137f.
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This masks all FP exceptions (like every other UNIX system), and makes
it possible for gcc 2.5's long double support to work.
1994-01-08 01:19:06 +00:00
2250fff236
Cleanup and garbage collection; nothing significant. From magnum branch.
1993-12-20 05:25:02 +00:00
9a48e42157
__386BSD__ -> __NetBSD__
1993-12-07 12:51:58 +00:00
3643c134f1
Change "#endif FOO" to "#endif /* FOO */", to keep gcc -Wall, lint, etc.
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from complaining about a trivial issue.
1993-07-29 21:42:19 +00:00
30177b538f
add rcsids to everything and clean up headers
1993-05-22 07:56:12 +00:00
9948c39839
npx patches from Bruce Evans. patchkit 10002
1993-05-09 23:02:34 +00:00
61f282557f
initial import of 386bsd-0.1 sources
1993-03-21 09:45:37 +00:00
agc