src/lib/libc/softfloat, branch release/11.1.0

libc: replace 0 with NULL for pointers.

2016-04-10T19:33:58+00:00

While here also cleanup some surrounding code; particularly
drop some malloc() casts.

Found with devel/coccinelle.

Reviewed by:	bde (previous version - all new bugs are mine)

Replace use of ${.CURDIR} by ${LIBC_SRCTOP} and define ${LIBC_SRCTOP}

2014-03-04T02:19:39+00:00

if not already defined. This allows building libc from outside of
lib/libc using a reach-over makefile.

A typical use-case is to build a standard ILP32 version and a COMPAT32
version in a single iteration by building the COMPAT32 version using a
reach-over makefile.

Obtained from:	Juniper Networks, Inc.

Conditionalize the floatunsisf and floatunsidf functions, added in

2012-01-20T14:44:21+00:00

NetBSD's rev 1.6 of this file, on !defined(SOFTFLOAT_FOR_GCC).  These
functions are provided by libgcc, so we don't need them.  This should
unbreak mips.

Merge in the latest SoftFloat changes from NetBSD. (NetBSD isn't the

2012-01-20T06:16:14+00:00

original vendor, but we're using their heavily modified version.)
This brings in functions for long double emulation (both extended and
quad formats), which may be useful for testing, and also for replacing
libc/sparc64/fpu/.

Remove functions from softfloat's Symbol.map that don't need to be exported.

2012-01-16T04:06:56+00:00

Also use the proper number of underscores for internal names.  (Changing
the names should be fine, since apparently the symbols are currently
unused.)

Convert softfloat to use the standard exception flag and rounding macros

2012-01-16T04:05:53+00:00

in fenv.h instead of the non-standard and incomplete ones in ieeefp.h.

Thanks to Ian Lepore for testing this patch.

Powerpc is special here. powerpc and powerpc64 use different ABIs, so

2010-08-24T20:54:43+00:00

their implementations aren't in the same files.  Introduce LIBC_ARCH
and use that in preference to MACHINE_CPUARCH.  Tested by amd64 and
powerpc64 builds (thanks nathanw@)

MFtbemd:

2010-08-23T22:24:11+00:00

Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.

Add #endif missed in r206490.

2010-04-11T21:22:02+00:00

While SPARC V9 allows tininess to be detected either before or after

2010-04-11T20:08:54+00:00

rounding (impl. dep. #55), the SPARC JPS1 responsible for SPARC64 and
UltraSPARC processors defines that in all cases  tininess is detected
before rounding therefore rounding up to the smallest normalized number
should set the underflow flag. This change is needed for using SoftFloat
on sparc64 for reference purposes.

PR:		144900
Submitted by:	Peter Jeremy