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11 Commits

Author SHA1 Message Date
Andrew Turner
bb6c193ec7 On armv6 access both the softfloat and, when available, the vfp to get and 
set the floating-point environment.
 2014-03-15 21:58:07 +00:00
Andrew Turner
a541d15cfe * Mark static inline functions with __fenv_static. 
* Correctly shift the mask when masking/unmasking exceptions.
 2014-01-25 18:13:43 +00:00
Andrew Turner
c9081a6c9c Update the hard-float version of the fenv functions to use the VFP unit. 
Any other floating-point unit is unsupported on ARM.
 2013-10-27 10:44:22 +00:00
David Schultz
7082a2cf72 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
David Schultz
7bde21b1f9 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
David Schultz
d78e594bc9 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
David Schultz
10b01832c3 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
Olivier Houchard
15d3b4db61 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
David Schultz
f365db00e5 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
Olivier Houchard
60b22cf1c2 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
David Schultz
19220bc13f 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