1 files changed, 113 insertions, 0 deletions
diff --git a/test/Unit/fixxfdi_test.c b/test/Unit/fixxfdi_test.c
new file mode 100644
index 000000000000..47820c35b5a7
--- /dev/null
+++ b/test/Unit/fixxfdi_test.c
@@ -0,0 +1,113 @@
+//===-- fixxfdi_test.c - Test __fixxfdi -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __fixxfdi for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+#include <stdio.h>
+
+
+#if HAS_80_BIT_LONG_DOUBLE
+// Returns: convert a to a signed long long, rounding toward zero.
+
+// Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
+//             su_int is a 32 bit integral type
+//             value in long double is representable in di_int (no range checking performed)
+
+// gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
+// 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
+
+di_int __fixxfdi(long double a);
+
+int test__fixxfdi(long double a, di_int expected)
+{
+    di_int x = __fixxfdi(a);
+    if (x != expected)
+        printf("error in __fixxfdi(%LA) = %llX, expected %llX\n",
+               a, x, expected);
+    return x != expected;
+}
+
+char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
+char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
+char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
+#endif
+
+int main()
+{
+#if HAS_80_BIT_LONG_DOUBLE
+    if (test__fixxfdi(0.0, 0))
+        return 1;
+
+    if (test__fixxfdi(0.5, 0))
+        return 1;
+    if (test__fixxfdi(0.99, 0))
+        return 1;
+    if (test__fixxfdi(1.0, 1))
+        return 1;
+    if (test__fixxfdi(1.5, 1))
+        return 1;
+    if (test__fixxfdi(1.99, 1))
+        return 1;
+    if (test__fixxfdi(2.0, 2))
+        return 1;
+    if (test__fixxfdi(2.01, 2))
+        return 1;
+    if (test__fixxfdi(-0.5, 0))
+        return 1;
+    if (test__fixxfdi(-0.99, 0))
+        return 1;
+    if (test__fixxfdi(-1.0, -1))
+        return 1;
+    if (test__fixxfdi(-1.5, -1))
+        return 1;
+    if (test__fixxfdi(-1.99, -1))
+        return 1;
+    if (test__fixxfdi(-2.0, -2))
+        return 1;
+    if (test__fixxfdi(-2.01, -2))
+        return 1;
+
+    if (test__fixxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
+        return 1;
+    if (test__fixxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
+        return 1;
+
+    if (test__fixxfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL))
+        return 1;
+    if (test__fixxfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL))
+        return 1;
+
+    if (test__fixxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
+        return 1;
+    if (test__fixxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
+        return 1;
+
+    if (test__fixxfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL))
+        return 1;
+    if (test__fixxfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL))
+        return 1;
+
+    if (test__fixxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
+        return 1;
+    if (test__fixxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
+        return 1;
+
+    if (test__fixxfdi(-0x1.0000000000000000p+63L, 0x8000000000000000LL))
+        return 1;
+    if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0x8000000000000001LL))
+        return 1;
+    if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0x8000000000000002LL))
+        return 1;
+
+#endif
+   return 0;
+}