1 files changed, 36 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/fixunssfsi_test.zig b/lib/std/special/compiler_rt/fixunssfsi_test.zig
new file mode 100644
index 0000000000..4aee84d2d2
--- /dev/null
+++ b/lib/std/special/compiler_rt/fixunssfsi_test.zig
@@ -0,0 +1,36 @@
+const __fixunssfsi = @import("fixunssfsi.zig").__fixunssfsi;
+const testing = @import("std").testing;
+
+fn test__fixunssfsi(a: f32, expected: u32) void {
+    const x = __fixunssfsi(a);
+    testing.expect(x == expected);
+}
+
+test "fixunssfsi" {
+    test__fixunssfsi(0.0, 0);
+
+    test__fixunssfsi(0.5, 0);
+    test__fixunssfsi(0.99, 0);
+    test__fixunssfsi(1.0, 1);
+    test__fixunssfsi(1.5, 1);
+    test__fixunssfsi(1.99, 1);
+    test__fixunssfsi(2.0, 2);
+    test__fixunssfsi(2.01, 2);
+    test__fixunssfsi(-0.5, 0);
+    test__fixunssfsi(-0.99, 0);
+
+    test__fixunssfsi(-1.0, 0);
+    test__fixunssfsi(-1.5, 0);
+    test__fixunssfsi(-1.99, 0);
+    test__fixunssfsi(-2.0, 0);
+    test__fixunssfsi(-2.01, 0);
+
+    test__fixunssfsi(0x1.000000p+31, 0x80000000);
+    test__fixunssfsi(0x1.000000p+32, 0xFFFFFFFF);
+    test__fixunssfsi(0x1.FFFFFEp+31, 0xFFFFFF00);
+    test__fixunssfsi(0x1.FFFFFEp+30, 0x7FFFFF80);
+    test__fixunssfsi(0x1.FFFFFCp+30, 0x7FFFFF00);
+
+    test__fixunssfsi(-0x1.FFFFFEp+30, 0);
+    test__fixunssfsi(-0x1.FFFFFCp+30, 0);
+}