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diff --git a/src/libs/softfloat-3e/testfloat/source/test_abcz_f64.c b/src/libs/softfloat-3e/testfloat/source/test_abcz_f64.c
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+++ b/src/libs/softfloat-3e/testfloat/source/test_abcz_f64.c
@@ -0,0 +1,111 @@
+
+/*============================================================================
+
+This C source file is part of TestFloat, Release 3e, a package of programs for
+testing the correctness of floating-point arithmetic complying with the IEEE
+Standard for Floating-Point, by John R. Hauser.
+
+Copyright 2011, 2012, 2013, 2014, 2017 The Regents of the University of
+California.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice,
+    this list of conditions, and the following disclaimer.
+
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions, and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+ 3. Neither the name of the University nor the names of its contributors may
+    be used to endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS", AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE
+DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+=============================================================================*/
+
+#include <stdint.h>
+#include "platform.h"
+#include "softfloat.h"
+#include "genCases.h"
+#include "verCases.h"
+#include "writeCase.h"
+#include "testLoops.h"
+
+#ifdef FLOAT64
+
+#pragma STDC FENV_ACCESS ON
+
+void
+ test_abcz_f64(
+     float64_t trueFunction( float64_t, float64_t, float64_t ),
+     float64_t subjFunction( float64_t, float64_t, float64_t )
+ )
+{
+    int count;
+    float64_t trueZ;
+    uint_fast8_t trueFlags;
+    float64_t subjZ;
+    uint_fast8_t subjFlags;
+
+    genCases_f64_abc_init();
+    genCases_writeTestsTotal( testLoops_forever );
+    verCases_errorCount = 0;
+    verCases_tenThousandsCount = 0;
+    count = 10000;
+    while ( ! genCases_done || testLoops_forever ) {
+        genCases_f64_abc_next();
+        *testLoops_trueFlagsPtr = 0;
+        trueZ = trueFunction( genCases_f64_a, genCases_f64_b, genCases_f64_c );
+        trueFlags = *testLoops_trueFlagsPtr;
+        testLoops_subjFlagsFunction();
+        subjZ = subjFunction( genCases_f64_a, genCases_f64_b, genCases_f64_c );
+        subjFlags = testLoops_subjFlagsFunction();
+        --count;
+        if ( ! count ) {
+            verCases_perTenThousand();
+            count = 10000;
+        }
+        if ( ! f64_same( trueZ, subjZ ) || (trueFlags != subjFlags) ) {
+            if (
+                   ! verCases_checkNaNs
+                && (   f64_isSignalingNaN( genCases_f64_a )
+                    || f64_isSignalingNaN( genCases_f64_b )
+                    || f64_isSignalingNaN( genCases_f64_c )
+                   )
+            ) {
+                trueFlags |= softfloat_flag_invalid;
+            }
+            if (
+                   verCases_checkNaNs
+                || ! f64_isNaN( trueZ )
+                || ! f64_isNaN( subjZ )
+                || f64_isSignalingNaN( subjZ )
+                || (trueFlags != subjFlags)
+            ) {
+                ++verCases_errorCount;
+                verCases_writeErrorFound( 10000 - count );
+                writeCase_abc_f64(
+                    genCases_f64_a, genCases_f64_b, genCases_f64_c );
+                writeCase_z_f64( trueZ, trueFlags, subjZ, subjFlags );
+                if ( verCases_errorCount == verCases_maxErrorCount ) break;
+            }
+        }
+    }
+    verCases_writeTestsPerformed( 10000 - count );
+
+}
+
+#endif
+