40 Commits

Author SHA1 Message Date
imp
cd1f140ae4 Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.
2007-01-09 00:28:16 +00:00
kmacy
3785d22822 Fix TLS on sparc64 for statically and dynamically linked binaries
Approved by: rwatson (mentor)
Reviewed by: jmg and marcel
2006-10-08 02:50:34 +00:00
das
a84bfd6e04 Remove fpsetsticky(). This was added for SysV compatibility, but due
to mistakes from day 1, it has always had semantics inconsistent with
SVR4 and its successors.  In particular, given argument M:

- On Solaris and FreeBSD/{alpha,sparc64}, it clobbers the old flags
  and *sets* the new flag word to M.  (NetBSD, too?)
- On FreeBSD/{amd64,i386}, it *clears* the flags that are specified in M
  and leaves the remaining flags unchanged (modulo a small bug on amd64.)
- On FreeBSD/ia64, it is not implemented.

There is no way to fix fpsetsticky() to DTRT for both old FreeBSD apps
and apps ported from other operating systems, so the best approach
seems to be to kill the function and fix any apps that break.  I
couldn't find any ports that use it, and any such ports would already
be broken on FreeBSD/ia64 and Linux anyway.

By the way, the routine has always been undocumented in FreeBSD,
except for an MLINK to a manpage that doesn't describe it.  This
manpage has stated since 5.3-RELEASE that the functions it describes
are deprecated, so that must mean that functions that it is *supposed*
to describe but doesn't are even *more* deprecated.  ;-)

Note that fpresetsticky() has been retained on FreeBSD/i386.  As far
as I can tell, no other operating systems or ports of FreeBSD
implement it, so there's nothing for it to be inconsistent with.

PR:		75862
Suggested by:	bde
2005-03-15 15:53:39 +00:00
das
87888496cc Replace the ldexp() implementation in libc with a renamed copy of the
scalbn() implementation from libm.  (The two functions are defined to
be identical, but ldexp() lives in libc for backwards compatibility.)
The old ldexp() implementation...
  - was more complicated than this one
  - set errno instead of raising FP exceptions
  - got some corner cases wrong
    (e.g. ldexp(1.0, 2000) in round-to-zero mode)

The new implementation lives in libc/gen instead of
libc/$MACHINE_ARCH/gen, since we don't need N copies of a
machine-independent file.  The amd64 and i386 platforms
retain their fast and correct MD implementations and
override this one.
2005-01-22 06:03:40 +00:00
das
906c1e9b6f Correct the values of FLT_ROUNDS for the FE_UPWARD and FE_DOWNWARD cases. 2005-01-18 15:29:28 +00:00
dfr
2f90ca8b3c Add support for TLS in statically linked programs. 2004-08-15 16:18:52 +00:00
das
1a69fc3370 Replace seven nominally MD implementations of frexp() that are broken
for subnormals with one implementation that works.
2004-07-18 21:23:39 +00:00
das
65d8d759b1 Implement the classification macros isfinite(), isinf(), isnan(), and
isnormal() the hard way, rather than relying on fpclassify().  This is
a lose in the sense that we need a total of 12 functions, but it is
necessary for binary compatibility because we have never bumped libm's
major version number.  In particular, isinf(), isnan(), and isnanf()
were BSD libc functions before they were C99 macros, so we can't
reimplement them in terms of fpclassify() without adding a dependency
on libc.so.5.  I have tried to arrange things so that programs that
could be compiled in FreeBSD 4.X will generate the same external
references when compiled in 5.X.  At the same time, the new macros
should remain C99-compliant.

The isinf() and isnan() functions remain in libc for historical
reasons; however, I have moved the functions that implement the macros
isfinite() and isnormal() to libm where they belong.  Moreover,
half a dozen MD versions of isinf() and isnan() have been replaced
with MI versions that work equally well.

Prodded by:	kris
2004-07-09 03:32:40 +00:00
das
0a50563417 Fix some aliasing problems. 2004-02-16 10:02:40 +00:00
cperciva
371e76013c style cleanup: Remove duplicate $FreeBSD$ tags.
These files had tags after teh copyright notice,
inside the comment block (incorrect, removed),
and outside the comment block (correct).

Approved by:	rwatson (mentor)
2004-02-10 20:45:28 +00:00
nectar
34b6220e44 Remove unused variables. Add required headers and function
declarations.
2004-01-06 18:53:26 +00:00
jake
1cee0842b2 Implement signalcontext. 2003-08-08 15:40:28 +00:00
jake
de291c89d2 Implement makecontext. 2003-04-01 23:28:50 +00:00
mike
1998abeb23 o Implement C99 classification macros isfinite(), isinf(), isnan(),
isnormal().  The current isinf() and isnan() are perserved for
  binary compatibility with 5.0, but new programs will use the macros.
o Implement C99 comparison macros isgreater(), isgreaterequal(),
  isless(), islessequal(), islessgreater(), isunordered().

Submitted by:	David Schultz <dschultz@uclink.Berkeley.EDU>
2003-02-12 20:03:41 +00:00
mike
b4e3f2f94a Implement fpclassify():
o Add a MD header private to libc called _fpmath.h; this header
  contains bitfield layouts of MD floating-point types.
o Add a MI header private to libc called fpmath.h; this header
  contains bitfield layouts of MI floating-point types.
o Add private libc variables to lib/libc/$arch/gen/infinity.c for
  storing NaN values.
o Add __double_t and __float_t to <machine/_types.h>, and provide
  double_t and float_t typedefs in <math.h>.
o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF,
  HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to
  <math.h> and others (FLT_EVAL_METHOD, DECIMAL_DIG) to <float.h> via
  <machine/float.h>.
o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based
  on the size of its argument.  __fpclassifyl() is never called on
  alpha because (sizeof(long double) == sizeof(double)), which is good
  since __fpclassifyl() can't deal with such a small `long double'.

This was developed by David Schultz and myself with input from bde and
fenner.

PR:		23103
Submitted by:	David Schultz <dschultz@uclink.Berkeley.EDU>
		(significant portions)
Reviewed by:	bde, fenner (earlier versions)
2003-02-08 20:37:55 +00:00
tmm
6e68a2b1ca Rewrite longjmp() and _longjmp() to directly restore the saved frame,
instead of unwinding the call stack. This makes them usable to switch
stacks, e.g. for libc_r.
Do not save the frame pointer in setjmp() and _setjmp(), it is not needed
any more.
Rename _longjmp() to ___longjmp(), with a weak alias to _longjmp(), like
the other architectures did.
2003-01-05 22:17:32 +00:00
tmm
e40f9005a3 Rename siglongjmp() to __siglongjmp(), with a weak alias to siglongjmp(),
like the other architectures do.
2003-01-05 22:10:06 +00:00
archie
d93f84495b Re-apply the previously backed-out commit that fixes the problem where
HUGE_VAL is not properly aligned on some architectures. The previous
fix now works because the two versions of 'math.h' (include/math.h
and lib/msun/src/math.h) have since been merged into one.

PR:	bin/43544
2002-10-31 23:05:20 +00:00
archie
207fb06f80 Revert previous commit to unbreak world until we figure out the
right way to do it.
2002-09-20 15:43:26 +00:00
archie
59b24d359e Fix a problem with the definition of HUGE_VAL causing the gcc warning
"cast increases required alignment of target type" on some platforms.

Reviewed by:	bde
2002-09-19 19:47:27 +00:00
tmm
c14b63a0b9 Use the macros from machine/fsr.h; some minor cleanups. 2002-09-14 18:07:03 +00:00
tmm
6bea77d590 Add implementations of fpgetmask(), fpgetround(), fpgetsticky(),
fpsetround(), fpsetsticky(), obtained from NetBSD and tweaked a little
to use definitions from machine/fsr.h instead of magic numbers.
2002-09-14 18:06:21 +00:00
tmm
c568640675 Add an implementation of fabs() (which is quite trivial).
When it is called directly, gcc is smart enough to generate inline
code for it, which is why it wasn't noticed before that it was missing.

fabs() would probably better fit into libm, but it has traditionally been
in libc on FreeBSD, so there is probably software around that makes
assumptions about this by now.
2002-09-13 16:01:26 +00:00
obrien
83975c1387 Use __FBSDID. 2002-06-29 03:23:51 +00:00
obrien
30c36077fc Add frexp(3).
Obtained from:	OpenBSD
2002-06-29 03:23:18 +00:00
obrien
d90536e35b Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.
2002-03-22 21:53:29 +00:00
obrien
1196344bb3 Remove 'register' keyword. 2002-03-21 18:49:23 +00:00
tmm
add3c8c972 Account for <machine/fsr.h> no longer being usable for assembler code. 2002-03-11 03:13:02 +00:00
tmm
30dcded43a Fix __dtoul to work on sparc64 (it used a half-way v8 stack layout),
and make it PIC-aware.
2002-03-11 03:10:55 +00:00
jake
605c439175 Add fpsetmask(). Needed to build miniperl.
Obtained from:	netbsd
2002-03-05 04:03:57 +00:00
jake
e4766db304 Fix a bug where siglongjmp would clobber the argument to return from
sigsetjmp.  It would return the value of the signal flag, instead.

Pointy hat to:	jake
2002-03-05 04:02:04 +00:00
jake
6f9fc42c7d Use jmpbuf offsets, not ucontext_t. 2001-12-29 06:40:35 +00:00
jake
3483475ed5 Add .register directives for gcc3.
Adapt to jmpbuf no longer being a ucontext_t.
Restore the context "by hand" in longjmp and call sigprocmask, instead
of just using sigreturn.
2001-12-29 06:39:53 +00:00
jake
56db29dc1a __infinity is not const. 2001-12-29 06:38:31 +00:00
jake
2e0c4bb65d Add jmpbuf offsets. Remove ucontext offsets. 2001-12-29 06:38:06 +00:00
jake
3e3b7768f5 Add .register directives for gcc3.
Adapt to jmpbuf no longer being a ucontext_t.
Call abort if longjmperror returns.
2001-12-29 06:37:33 +00:00
jake
6a36fe07de Actually build new files.
Forgotten by:	jake
2001-11-19 00:19:49 +00:00
jake
710eac603d Add more libc stuff.
Obtained from:	netbsd
2001-11-18 04:40:30 +00:00
jake
a85982e09c Catch up to jmpbuf changes. Define offsets used from assmebly language
in another file so that it is easy to see what they are and keep them in
sync with the headers (grafted from the kernel generated assym.s).
2001-11-18 04:35:09 +00:00
jake
e655c7bdca Minimal libc for sparc64.
Reviewed by:	obrien
2001-10-26 05:40:07 +00:00