1 files changed, 39 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/fixunsdfdi_test.zig b/lib/std/special/compiler_rt/fixunsdfdi_test.zig
new file mode 100644
index 0000000000..67eeb70520
--- /dev/null
+++ b/lib/std/special/compiler_rt/fixunsdfdi_test.zig
@@ -0,0 +1,39 @@
+const __fixunsdfdi = @import("fixunsdfdi.zig").__fixunsdfdi;
+const testing = @import("std").testing;
+
+fn test__fixunsdfdi(a: f64, expected: u64) void {
+    const x = __fixunsdfdi(a);
+    testing.expect(x == expected);
+}
+
+test "fixunsdfdi" {
+    //test__fixunsdfdi(0.0, 0);
+    //test__fixunsdfdi(0.5, 0);
+    //test__fixunsdfdi(0.99, 0);
+    test__fixunsdfdi(1.0, 1);
+    test__fixunsdfdi(1.5, 1);
+    test__fixunsdfdi(1.99, 1);
+    test__fixunsdfdi(2.0, 2);
+    test__fixunsdfdi(2.01, 2);
+    test__fixunsdfdi(-0.5, 0);
+    test__fixunsdfdi(-0.99, 0);
+    test__fixunsdfdi(-1.0, 0);
+    test__fixunsdfdi(-1.5, 0);
+    test__fixunsdfdi(-1.99, 0);
+    test__fixunsdfdi(-2.0, 0);
+    test__fixunsdfdi(-2.01, 0);
+
+    test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000);
+    test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000);
+
+    test__fixunsdfdi(-0x1.FFFFFEp+62, 0);
+    test__fixunsdfdi(-0x1.FFFFFCp+62, 0);
+
+    test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800);
+    test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000);
+    test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00);
+    test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800);
+
+    test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0);
+    test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0);
+}