1 files changed, 94 insertions, 0 deletions
diff --git a/test/Unit/fixdfdi_test.c b/test/Unit/fixdfdi_test.c
new file mode 100644
index 000000000000..d84d26d4b723
--- /dev/null
+++ b/test/Unit/fixdfdi_test.c
@@ -0,0 +1,94 @@
+//===-- fixdfdi_test.c - Test __fixdfdi -----------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file tests __fixdfdi for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "int_lib.h"
+#include <stdio.h>
+
+// Returns: convert a to a signed long long, rounding toward zero.
+
+// Assumption: double is a IEEE 64 bit floating point type 
+//             su_int is a 32 bit integral type
+//             value in double is representable in di_int (no range checking performed)
+
+// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
+
+di_int __fixdfdi(double a);
+
+int test__fixdfdi(double a, di_int expected)
+{
+    di_int x = __fixdfdi(a);
+    if (x != expected)
+        printf("error in __fixdfdi(%A) = %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(double)*CHAR_BIT == 64] = {0};
+
+int main()
+{
+    if (test__fixdfdi(0.0, 0))
+        return 1;
+
+    if (test__fixdfdi(0.5, 0))
+        return 1;
+    if (test__fixdfdi(0.99, 0))
+        return 1;
+    if (test__fixdfdi(1.0, 1))
+        return 1;
+    if (test__fixdfdi(1.5, 1))
+        return 1;
+    if (test__fixdfdi(1.99, 1))
+        return 1;
+    if (test__fixdfdi(2.0, 2))
+        return 1;
+    if (test__fixdfdi(2.01, 2))
+        return 1;
+    if (test__fixdfdi(-0.5, 0))
+        return 1;
+    if (test__fixdfdi(-0.99, 0))
+        return 1;
+    if (test__fixdfdi(-1.0, -1))
+        return 1;
+    if (test__fixdfdi(-1.5, -1))
+        return 1;
+    if (test__fixdfdi(-1.99, -1))
+        return 1;
+    if (test__fixdfdi(-2.0, -2))
+        return 1;
+    if (test__fixdfdi(-2.01, -2))
+        return 1;
+
+    if (test__fixdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
+        return 1;
+    if (test__fixdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
+        return 1;
+
+    if (test__fixdfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL))
+        return 1;
+    if (test__fixdfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL))
+        return 1;
+
+    if (test__fixdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
+        return 1;
+    if (test__fixdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
+        return 1;
+
+    if (test__fixdfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL))
+        return 1;
+    if (test__fixdfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL))
+        return 1;
+
+   return 0;
+}