1 files changed, 49 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/fixunstfdi_test.zig b/lib/std/special/compiler_rt/fixunstfdi_test.zig
new file mode 100644
index 0000000000..0d47641c09
--- /dev/null
+++ b/lib/std/special/compiler_rt/fixunstfdi_test.zig
@@ -0,0 +1,49 @@
+const __fixunstfdi = @import("fixunstfdi.zig").__fixunstfdi;
+const testing = @import("std").testing;
+
+fn test__fixunstfdi(a: f128, expected: u64) void {
+    const x = __fixunstfdi(a);
+    testing.expect(x == expected);
+}
+
+test "fixunstfdi" {
+    test__fixunstfdi(0.0, 0);
+
+    test__fixunstfdi(0.5, 0);
+    test__fixunstfdi(0.99, 0);
+    test__fixunstfdi(1.0, 1);
+    test__fixunstfdi(1.5, 1);
+    test__fixunstfdi(1.99, 1);
+    test__fixunstfdi(2.0, 2);
+    test__fixunstfdi(2.01, 2);
+    test__fixunstfdi(-0.5, 0);
+    test__fixunstfdi(-0.99, 0);
+    test__fixunstfdi(-1.0, 0);
+    test__fixunstfdi(-1.5, 0);
+    test__fixunstfdi(-1.99, 0);
+    test__fixunstfdi(-2.0, 0);
+    test__fixunstfdi(-2.01, 0);
+
+    test__fixunstfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000);
+    test__fixunstfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000);
+
+    test__fixunstfdi(-0x1.FFFFFEp+62, 0);
+    test__fixunstfdi(-0x1.FFFFFCp+62, 0);
+
+    test__fixunstfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00);
+    test__fixunstfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800);
+
+    test__fixunstfdi(-0x1.FFFFFFFFFFFFFp+62, 0);
+    test__fixunstfdi(-0x1.FFFFFFFFFFFFEp+62, 0);
+
+    test__fixunstfdi(0x1.FFFFFFFFFFFFFFFEp+63, 0xFFFFFFFFFFFFFFFF);
+    test__fixunstfdi(0x1.0000000000000002p+63, 0x8000000000000001);
+    test__fixunstfdi(0x1.0000000000000000p+63, 0x8000000000000000);
+    test__fixunstfdi(0x1.FFFFFFFFFFFFFFFCp+62, 0x7FFFFFFFFFFFFFFF);
+    test__fixunstfdi(0x1.FFFFFFFFFFFFFFF8p+62, 0x7FFFFFFFFFFFFFFE);
+    test__fixunstfdi(0x1.p+64, 0xFFFFFFFFFFFFFFFF);
+
+    test__fixunstfdi(-0x1.0000000000000000p+63, 0);
+    test__fixunstfdi(-0x1.FFFFFFFFFFFFFFFCp+62, 0);
+    test__fixunstfdi(-0x1.FFFFFFFFFFFFFFF8p+62, 0);
+}