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13 Commits

Author SHA1 Message Date
das
aae27c7e21 Add a change I missed in r230367 (don't inline arm's fenv.h functions). 2012-01-20 07:01:58 +00:00
das
0628630580 Don't inline fenv.h functions on arm for now. Inlining makes sense: 
the function bodies require only 2 to 10 instructions.  However, it
leads to application binaries that refer to a private ABI, namely, the
softfloat innards in libc.  This could complicate future changes in
the implementation of the floating-point emulation layer, so it seems
best to have programs refer to the official fe* entry points in libm.
 2012-01-20 06:54:30 +00:00
das
16087d23a4 Add an implementation of fenv.h intended for platforms that lack an FPU and 
use softfloat.

Thanks to Ian Lepore for testing and debugging this patch.  The fenv
regression tests pass (at least for Ian's arm chip) with this change.
 2012-01-16 04:09:17 +00:00
das
1e6760c16a Use #include "fenv.h" instead of #include <fenv.h>. This makes it 
more convenient to compile the math library by itself.

Requested by:	bde
 2011-10-16 05:37:56 +00:00
das
a38603b0b5 Provide external definitions of all of the standardized functions in 
fenv.h that are currently inlined.

The definitions are provided in fenv.c via 'extern inline'
declaractions.  This assumes the compiler handles 'extern inline' as
specified in C99, which has been true under FreeBSD since 8.0.

The goal is to eventually remove the 'static' keyword from the inline
definitions in fenv.h, so that non-inlined references all wind up
pointing to the same external definition like they're supposed to.
I am deferring the second step to provide a window where
newly-compiled apps will still link against old math libraries.
(This isn't supported, but there's no need to cause undue breakage.)

Reviewed by:    stefanf, bde
 2011-10-10 15:43:09 +00:00
deischen
2a7306fdc5 Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00
deischen
d76f24935a Add symbol versioning to libm. 2006-03-27 23:59:45 +00:00
das
6448887f3b Replace fegetmask() and fesetmask() with feenableexcept(), 
fedisableexcept(), and fegetexcept().  These two sets of routines
provide the same functionality.  I implemented the former as an
undocumented internal interface to make the regression test easier to
write.  However, fe(enable|disable|get)except() is already part of
glibc, and I would like to avoid gratuitous differences.  The only
major flaw in the glibc API is that there's no good way to report
errors on processors that don't support all the unmasked exceptions.
 2005-03-16 19:03:46 +00:00
das
ed73924a0b Define the LDBL_PREC to be the number of significant bits in a long 
double's mantissa.
 2005-03-07 04:53:36 +00:00
cognet
fa9ea53805 Define FE_TONEAREST, FE_TOWARDZERO, FE_UPWARD, FE_DOWNWARD and _ROUND_MASK to 
unbreak the build for arm.
 2005-01-24 00:35:02 +00:00
das
4ec986eab3 Mark all inline asms that read the floating-point control or status 
registers as volatile.  Instructions that *wrote* to FP state were
already marked volatile, but apparently gcc has license to move
non-volatile asms past volatile asms.  This broke amd64's feupdateenv
at -O2 due to a WAR conflict between fnstsw and fldenv there.
 2005-01-14 07:09:23 +00:00
cognet
d416db42ae Only use rfs and wfs if ARM_HARD_FLOAT is defined, and use stubs if it is not, 
in order to unbreak arm make world. The right way to do it with soft floats
will be figured out later.
Discussed with:	das
 2004-08-05 14:07:24 +00:00
das
3994165f74 Add an fenv.h implementation for the arm port. 
It does not appear to be possible to cross-build arm from i386 at the
moment, and I have no ARM hardware anyway.  Thus, I'm sure there are
bugs.  I will gladly fix these when the arm port is more mature.

Reviewed by:	standards@
 2004-06-06 10:03:59 +00:00