Commit Graph

34 Commits

Author SHA1 Message Date
Daniel Eischen
6fad3aaf15 Add each directory's symbol map file to SYM_MAPS. 2006-03-13 01:15:01 +00:00
Daniel Eischen
cce72e8860 Add symbol maps and initial symbol version definitions to libc.
Reviewed by:	davidxu
2006-03-13 00:53:21 +00:00
David Schultz
7b74e4a759 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
David Schultz
1dfab5edec Define LDBL_NBIT to be a mask indicating the position of the integer
bit in a long double.  For architectures that don't have such a bit,
LDBL_NBIT is 0.  This makes it possible to say `mantissa & ~LDBL_NBIT'
in places that previously used an #ifdef to select the right expression.
The optimizer should dispense with the extra arithmetic when LDBL_NBIT
is 0.
2005-03-07 04:55:22 +00:00
David Schultz
f154b03b25 Update my email address. 2005-02-06 03:23:31 +00:00
David Schultz
00646ca204 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
David Schultz
851e420fba Add a file missed in the previous commit:
Eliminate gdtoa.mk and move its contents to ${MACHINE_ARCH}/Makefile.inc.
  The purpose of having a separate file involved an abandoned scheme that
  would have kept contrib/gdtoa out of the include path for the rest of libc.
2005-01-15 05:26:32 +00:00
David Schultz
bd15659f64 Eliminate gdtoa.mk and move its contents to ${MACHINE_ARCH}/Makefile.inc.
The purpose of having a separate file involved an abandoned scheme that
would have kept contrib/gdtoa out of the include path for the rest of libc.
2005-01-15 05:23:58 +00:00
Doug Rabson
ccd13c49b5 Add support for TLS in statically linked programs. 2004-08-15 16:18:52 +00:00
Andrew Gallatin
df11547f5d Fix printing of long doubles to match the size that
gcc is using.  This fixes devstat consumers (like vmstat, iostat,
systat) so they don't print crazy zillion digit numbers for
disk transfers and bandwidth.

According to gcc, long doubles are 64-bits, rather than 128 bits
like the SVR4 ABI spec wants them to be..  Note that MacOSX also treats
long doubles as 64-bits, and not 128 bits, so we are in good company.

Reviewed by: das
Approved by: grehan
2004-07-19 23:56:07 +00:00
Peter Grehan
cc73b0f03d Add signalcontext, required by KSE. 2004-07-19 12:08:03 +00:00
Peter Grehan
44d1098779 The new program counter should go into the trapframe's srr0 and
not the link register, which was lucky enough to work.
2004-07-19 12:05:07 +00:00
David Schultz
39bcea8689 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
David Schultz
240dbabfa8 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
Peter Grehan
57df12f6c4 makecontext lib call.
Submitted by: Suleiman Souhlal <refugee@segfaulted.com>
2004-03-02 06:22:24 +00:00
David Schultz
36e22bed27 Fix some aliasing problems. 2004-02-16 10:02:40 +00:00
Peter Grehan
88d2dd24fd Add forgotten IEEE functions. The Perl 5.8 port now compiles.
Submitted by: Suleiman Souhlal <refugee@segfaulted.com>
Obtained from:  NetBSD
2004-02-12 09:11:06 +00:00
Peter Grehan
864dbc1065 Include <stdlib.h> to get abort() prototype. 2004-01-21 05:04:25 +00:00
David Schultz
a8cb7cca02 Define LDBL_MANH_SIZE and LDBL_MANL_SIZE to be the sizes of the
high and low words of the mantissa in bits, respectively.
2004-01-18 07:57:02 +00:00
Peter Grehan
448264b8a8 - Put manh/manl bitfields into correct-sized integral type.
- remove XXX normalization bit comment, code is correct.
2003-12-10 13:04:42 +00:00
Bruce M Simpson
abd498aa71 Add the mlockall() and munlockall() system calls.
- All those diffs to syscalls.master for each architecture *are*
   necessary. This needed clarification; the stub code generation for
   mlockall() was disabled, which would prevent applications from
   linking to this API (suggested by mux)
 - Giant has been quoshed. It is no longer held by the code, as
   the required locking has been pushed down within vm_map.c.
 - Callers must specify VM_MAP_WIRE_HOLESOK or VM_MAP_WIRE_NOHOLES
   to express their intention explicitly.
 - Inspected at the vmstat, top and vm pager sysctl stats level.
   Paging-in activity is occurring correctly, using a test harness.
 - The RES size for a process may appear to be greater than its SIZE.
   This is believed to be due to mappings of the same shared library
   page being wired twice. Further exploration is needed.
 - Believed to back out of allocations and locks correctly
   (tested with WITNESS, MUTEX_PROFILING, INVARIANTS and DIAGNOSTIC).

PR:             kern/43426, standards/54223
Reviewed by:    jake, alc
Approved by:    jake (mentor)
MFC after:	2 weeks
2003-08-11 07:14:08 +00:00
David Schultz
b7412bf571 Add a comment describing why it's important for the values in this
file to be correct, and how to generate them automatically.

Caused much pain and suffering for:	peter
2003-05-08 13:50:44 +00:00
David Schultz
92b93b37c0 Add __ldtoa(), a wrapper around gdtoa() to make it look like dtoa().
In support of this, add some MD macros to assist in converting long
doubles to the format expected by gdtoa().

Reviewed by:	silence on standards@
2003-04-05 22:10:13 +00:00
David Schultz
6a66acb565 Replace our ancient dtoa/strtod implementation with the gdtoa
package, a more recent, generalized set of routines.  Among the
changes:
- Declare strtof() and strtold() in stdlib.h.
- Add glue to libc to support these routines for all kinds
  of ``long double''.
- Update printf() to reflect the fact that dtoa works slightly
  differently now.

As soon as I see that nothing has blown up, I will kill
src/lib/libc/stdlib/strtod.c.  Soon printf() will be able
to use the new routines to output long doubles without loss
of precision, but numerous bugs in the existing code must
be addressed first.

Reviewed by:	bde (briefly), mike (mentor), obrien
2003-03-12 20:30:00 +00:00
Mike Barcroft
5d62092f94 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 Barcroft
8cf5ed5125 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
David E. O'Brien
5cafcbb49b We don't need our own personal definition of __CONCAT. 2003-01-18 23:26:04 +00:00
Peter Grehan
8238b87b55 Minimal libc for PowerPC.
Reviewed by: benno

Approved by: re (blanket)
2002-12-04 07:25:14 +00:00
Benno Rice
27c9ea57e8 _C_LABEL -> CNAME
Forgotten by:	benno
2002-05-17 05:11:13 +00:00
Benno Rice
c2cba7c501 Flesh this out, based on the NetBSD version.
Reviewed by:	obrien
2002-05-17 01:58:55 +00:00
David E. O'Brien
20764f1db8 Grow RSYSCALL. 2002-05-15 21:25:47 +00:00
David E. O'Brien
c623e77f5b Blah, fix stupid syntax error.
(where's the hat?)
2002-05-15 20:58:03 +00:00
David E. O'Brien
18c6222e38 host-network order conversion routines.
Luckily we are network order, so there is little to be done. :-)
2002-05-15 20:40:35 +00:00
David E. O'Brien
7c713eb208 Beginnings of syscall bits for PowerPC. These are no doubtedly wrong,
but it gets the build father and is in the right direction.

Partially obtained from:	NetBSD
2002-05-15 20:02:52 +00:00