Add a TestFloat based test suite for floating-point implementations

currently supporting sparc64. After a `make depend all` there are
three programs; testsoftfloat for testing against the SoftFloat in
src/lib/libc/softfloat for reference purposes, testemufloat for
testing the emulator source in src/lib/libc/sparc64/fpu and testfloat
for testing with the installed libc. Support for other architectures
can be added as needed.

PR:		144900
Submitted by:	Peter Jeremy

1 files changed, 42 insertions, 0 deletions

diff --git a/tools/test/testfloat/systmodes.h b/tools/test/testfloat/systmodes.h
new file mode 100644
index 0000000..b2befa4
--- /dev/null
+++ b/tools/test/testfloat/systmodes.h
@@ -0,0 +1,42 @@
+
+/*
+===============================================================================
+
+This C header file is part of TestFloat, Release 2a, a package of programs
+for testing the correctness of floating-point arithmetic complying to the
+IEC/IEEE Standard for Floating-Point.
+
+Written by John R. Hauser.  More information is available through the Web
+page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'.
+
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort
+has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
+TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO
+PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
+AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
+
+Derivative works are acceptable, even for commercial purposes, so long as
+(1) they include prominent notice that the work is derivative, and (2) they
+include prominent notice akin to these four paragraphs for those parts of
+this code that are retained.
+
+===============================================================================
+*/
+
+/*
+-------------------------------------------------------------------------------
+Target-specific function for setting the system's IEC/IEEE floating-point
+rounding mode.  Other system modes are also initialized as necessary (for
+example, exception trapping may be disabled).
+-------------------------------------------------------------------------------
+*/
+void syst_float_set_rounding_mode( int8 );
+
+/*
+-------------------------------------------------------------------------------
+Target-specific function for setting the IEC/IEEE rounding precision of
+subsequent extended double-precision operations performed by the system.
+-------------------------------------------------------------------------------
+*/
+void syst_float_set_rounding_precision( int8 );
+