Commit Graph

29 Commits

Author SHA1 Message Date
David Schultz
10a465e525 Fix some bugs that caused sparc64's quad precision sqrt to get
the wrong answer for virtually all inputs.

Thanks to remko for access to a sparc64 box for testing.
2008-04-12 03:10:13 +00:00
David Schultz
a9d5aa6aeb Make the software emulator for long doubles set the FPU exception
flags appropriately. The next step is to make it raise a SIGFPE if
any exceptions are unmasked.

Thanks to remko for access to a sparc64 box for testing.
2008-04-12 03:09:51 +00:00
John Birrell
37e19e1d85 Use an intermediate pointer to avoid a strict aliasing warning. 2007-11-23 05:52:13 +00:00
Warner Losh
c879ae3536 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
Marius Strobl
63067c1af8 Fix a typo in __fpu_ftox() that caused long double to long (and long long)
conversion of negative numbers to always result in -1.
While at it, rearrange the nearby comment so it fits in 80 chars per line,
like the rest of this file does.

PR:		107130
MFC after:	1 day
2006-12-24 22:24:39 +00:00
Kip Macy
5fe4c0e842 fix bus error in newsyslog by making sure that fields in struct fpemu
that are accessed as 8 byte quantities are 8 byte aligned
2006-10-12 04:38:41 +00:00
Marius Strobl
f2189783c9 For _Qp_{fge,fgt,fle,flt}() the SCD states that "Exceptions mimic fcmpeq",
this means they should set the cmpe flag when calling __fpu_compare().

Submitted by:	stefanf
MFC after:	2 weeks
2006-04-16 14:32:53 +00:00
Stefan Farfeleder
882cf65dd6 Add the functions _Qp_cmp() and _Qp_cmpe() as described in the Sparc
Compliance Definition.  On sparc64, GCC emits _Qp_cmp() calls for its
__builtin_isfoo() functions which are used for C99's isfoo() macros.

Approved by:	re(dwhite)
PR:		73782
2005-06-21 21:13:07 +00:00
Stefan Farfeleder
1470d46611 Fix long (and long long) to long double, unsigned to long double and unsigned
long (and unsigned long long) to long double conversions.
- Add a parameter that specifies the position of the sign bit to the _QP_TTOQ
  macro, previously it always looked at bit 31.  Pass a negative number to
  disable sign inspection for unsigned types.  This fixes _Qp_xtoq(),
  _Qp_uitoq() and _Qp_uxtoq().
- In the functions __fpu_itof() and __fpu_xtof(), look at the sign bit to
  decide whether we're doing a conversion from an unsigned type.  If so, don't
  negate the mantissa if the integer exceeds the biggest signed number.

PR:		55773
Patch by:	Stephen Paskaluk (based upon)
MFC after:	2 weeks
2005-05-27 10:00:22 +00:00
Alexander Kabaev
698784bef7 s/round/fpround/ to avoid naming clash with GCC builtin function. 2004-07-28 05:41:05 +00:00
Dag-Erling Smørgrav
261e614637 Use unions to avoid violating C99 strict aliasing rules. 2004-03-16 20:42:02 +00:00
Jacques Vidrine
78ea1df143 Remove unused variables. Add required headers and function
declarations.
2004-01-06 18:53:26 +00:00
Ruslan Ermilov
c51d717f0c libc_r wasn't so tied to libc for 22 months. 2002-11-18 09:50:57 +00:00
Jake Burkholder
ae162f3f31 Use FOO(a) for macros with variadic args, instead of FOO(a,) or FOO(a, ).
Submitted by:	gcc3.2
2002-09-02 02:30:20 +00:00
Jake Burkholder
dbf51f8db4 Remove unneeded include of machine/emul.h. 2002-06-18 02:15:11 +00:00
Jake Burkholder
3671cacae1 Implement _Qp_sqrt. I've been unable to find a C program that gcc generates
a call to this for, but apparently somehing in libstdc++ does.
2002-06-04 17:02:27 +00:00
Jake Burkholder
025c284b8d Add a support macro to convert the 5-bit packed register field of
a floating point instruction into a 6-bit register number for
double and quad arguments.
Make use of the new INSFPdq_RN macro where apporpriate; this
is required for correctly handling the "high" fp registers
(>= %f32).
Fix a number of bugs related to the handling of the high registers
which were caused by using __fpu_[gs]etreg() where __fpu_[gs]etreg64()
should be used (the former can only access the low, single-precision,
registers).

Submitted by:	tmm
2002-05-11 21:20:05 +00:00
David E. O'Brien
1f92f7e5d3 Use __FBSDID 2002-05-06 23:24:39 +00:00
David E. O'Brien
fd97c6aea9 We typically don't add trailing /'s. 2002-05-06 23:24:16 +00:00
Jake Burkholder
05f2fa5cee Add code to emulate arithmetic, comparison and conversion operations
on long double, which are not implemented in hardware on any UltraSPARC
chip that I know of.  This just calls into the existing floating point
emulator, which is still needed to emulate other floating point operations
in certain conditions.  Without this gcc has to generate the quad floating
point instructions directly, which sometimes causes internal compiler
errors.

Reviewed by:	tmm
2002-04-28 02:36:36 +00:00
Jake Burkholder
8c93421144 Emulate ldq and stq (load/store long double) instructions. GCC has started
using these to load long doubles, but they aren't implemented in hardware
on (at least) UltraSPARC I and II machines.
Emulate popc in the user trap handler as well.
Re-arrange slightly to make support functions more accessible.

Reviewed by:	tmm
2002-04-27 21:56:28 +00:00
Jake Burkholder
82436f1067 Rename some fields in struct frame to be compatible with NetBSD/OpenBSD,
and add some compatibility defines.  Add fields for ins and locals to
struct reg also for the same reason; these aren't filled in yet because
getting at those registers sucks and I'd rather not save them in the
trapframe just for this.  Reorder struct reg to be ABI compatible as
well.  Add needed include of machine/emul.h.

This gets pmdb (poor man's debugger) from OpenBSD mostly compiling but it
doesn't work yet :(
2002-04-09 00:57:23 +00:00
David E. O'Brien
1114a754ed Fix the style of the SCM ID's.
I believe have made all of libc .h's as consistent as possible.
2002-03-22 23:42:05 +00:00
David E. O'Brien
333fc21e3c 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
David E. O'Brien
078c6f985a SCM ID tweak. 2002-03-22 09:27:59 +00:00
David E. O'Brien
c05ac53b8b Remove __P() usage. 2002-03-21 22:49:10 +00:00
David E. O'Brien
8fb3f3f682 Remove 'register' keyword. 2002-03-21 18:49:23 +00:00
Thomas Moestl
d095bc220d Fix some bugs that would prevent %fsr to be set correctly, and add
support for fcmp and fcmpe instructions with a condition code
specification other than %fcc0.
This (primarily the first part) seems to fix a lot of problems that
people were seeing, e.g. perl and gawk failures.

Reported and analyzed by:	wollman
2002-03-11 03:18:17 +00:00
Thomas Moestl
4895e965c3 Add userland floating point emulator code for sparc64. This is a port
of the (never committed) in-kernel version (with some optimizations and
cleanups), which in turn was ported from NetBSD.
2002-02-23 21:37:18 +00:00