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diff --git a/tools/test/testfloat/systflags.h b/tools/test/testfloat/systflags.h
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+
+/*
+===============================================================================
+
+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 clearing the system's IEC/IEEE floating-point
+exception flags.  The previous value of the flags is returned.
+-------------------------------------------------------------------------------
+*/
+int8 syst_float_flags_clear( void );
+