1 files changed, 46 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/fixunsdfti_test.zig b/lib/std/special/compiler_rt/fixunsdfti_test.zig
new file mode 100644
index 0000000000..8241900692
--- /dev/null
+++ b/lib/std/special/compiler_rt/fixunsdfti_test.zig
@@ -0,0 +1,46 @@
+const __fixunsdfti = @import("fixunsdfti.zig").__fixunsdfti;
+const testing = @import("std").testing;
+
+fn test__fixunsdfti(a: f64, expected: u128) void {
+    const x = __fixunsdfti(a);
+    testing.expect(x == expected);
+}
+
+test "fixunsdfti" {
+    test__fixunsdfti(0.0, 0);
+
+    test__fixunsdfti(0.5, 0);
+    test__fixunsdfti(0.99, 0);
+    test__fixunsdfti(1.0, 1);
+    test__fixunsdfti(1.5, 1);
+    test__fixunsdfti(1.99, 1);
+    test__fixunsdfti(2.0, 2);
+    test__fixunsdfti(2.01, 2);
+    test__fixunsdfti(-0.5, 0);
+    test__fixunsdfti(-0.99, 0);
+    test__fixunsdfti(-1.0, 0);
+    test__fixunsdfti(-1.5, 0);
+    test__fixunsdfti(-1.99, 0);
+    test__fixunsdfti(-2.0, 0);
+    test__fixunsdfti(-2.01, 0);
+
+    test__fixunsdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000);
+    test__fixunsdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000);
+
+    test__fixunsdfti(-0x1.FFFFFEp+62, 0);
+    test__fixunsdfti(-0x1.FFFFFCp+62, 0);
+
+    test__fixunsdfti(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800);
+    test__fixunsdfti(0x1.0000000000000p+63, 0x8000000000000000);
+    test__fixunsdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00);
+    test__fixunsdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800);
+
+    test__fixunsdfti(0x1.FFFFFFFFFFFFFp+127, 0xFFFFFFFFFFFFF8000000000000000000);
+    test__fixunsdfti(0x1.0000000000000p+127, 0x80000000000000000000000000000000);
+    test__fixunsdfti(0x1.FFFFFFFFFFFFFp+126, 0x7FFFFFFFFFFFFC000000000000000000);
+    test__fixunsdfti(0x1.FFFFFFFFFFFFEp+126, 0x7FFFFFFFFFFFF8000000000000000000);
+    test__fixunsdfti(0x1.0000000000000p+128, 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
+
+    test__fixunsdfti(-0x1.FFFFFFFFFFFFFp+62, 0);
+    test__fixunsdfti(-0x1.FFFFFFFFFFFFEp+62, 0);
+}