1 files changed, 76 insertions, 0 deletions
diff --git a/test/builtins/Unit/trunctfdf2_test.c b/test/builtins/Unit/trunctfdf2_test.c
new file mode 100644
index 000000000000..46855e31bb5e
--- /dev/null
+++ b/test/builtins/Unit/trunctfdf2_test.c
@@ -0,0 +1,76 @@
+//===-------------- trunctfdf2_test.c - Test __trunctfdf2 -----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __trunctfdf2 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include <stdio.h>
+
+#if __LDBL_MANT_DIG__ == 113
+
+#include "fp_test.h"
+
+double __trunctfdf2(long double a);
+
+int test__trunctfdf2(long double a, uint64_t expected)
+{
+    double x = __trunctfdf2(a);
+    int ret = compareResultD(x, expected);
+
+    if (ret)
+    {
+        printf("error in test__trunctfdf2(%.20Lf) = %lf, "
+               "expected %lf\n", a, x, fromRep64(expected));
+    }
+    return ret;
+}
+
+char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
+
+#endif
+
+int main()
+{
+#if __LDBL_MANT_DIG__ == 113
+    // qNaN
+    if (test__trunctfdf2(makeQNaN128(),
+                         UINT64_C(0x7ff8000000000000)))
+        return 1;
+    // NaN
+    if (test__trunctfdf2(makeNaN128(UINT64_C(0x810000000000)),
+                         UINT64_C(0x7ff8100000000000)))
+        return 1;
+    // inf
+    if (test__trunctfdf2(makeInf128(),
+                         UINT64_C(0x7ff0000000000000)))
+        return 1;
+    // zero
+    if (test__trunctfdf2(0.0L, UINT64_C(0x0)))
+        return 1;
+
+    if (test__trunctfdf2(0x1.af23456789bbaaab347645365cdep+5L,
+                         UINT64_C(0x404af23456789bbb)))
+        return 1;
+    if (test__trunctfdf2(0x1.dedafcff354b6ae9758763545432p-9L,
+                         UINT64_C(0x3f6dedafcff354b7)))
+        return 1;
+    if (test__trunctfdf2(0x1.2f34dd5f437e849b4baab754cdefp+4534L,
+                         UINT64_C(0x7ff0000000000000)))
+        return 1;
+    if (test__trunctfdf2(0x1.edcbff8ad76ab5bf46463233214fp-435L,
+                         UINT64_C(0x24cedcbff8ad76ab)))
+        return 1;
+
+#else
+    printf("skipped\n");
+
+#endif
+    return 0;
+}