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-rw-r--r--lib/std/special/compiler_rt/muldi3_test.zig51
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/muldi3_test.zig b/lib/std/special/compiler_rt/muldi3_test.zig
new file mode 100644
index 0000000000..db4daf1e1e
--- /dev/null
+++ b/lib/std/special/compiler_rt/muldi3_test.zig
@@ -0,0 +1,51 @@
+const __muldi3 = @import("muldi3.zig").__muldi3;
+const testing = @import("std").testing;
+
+fn test__muldi3(a: i64, b: i64, expected: i64) void {
+ const x = __muldi3(a, b);
+ testing.expect(x == expected);
+}
+
+test "muldi3" {
+ test__muldi3(0, 0, 0);
+ test__muldi3(0, 1, 0);
+ test__muldi3(1, 0, 0);
+ test__muldi3(0, 10, 0);
+ test__muldi3(10, 0, 0);
+ test__muldi3(0, 81985529216486895, 0);
+ test__muldi3(81985529216486895, 0, 0);
+
+ test__muldi3(0, -1, 0);
+ test__muldi3(-1, 0, 0);
+ test__muldi3(0, -10, 0);
+ test__muldi3(-10, 0, 0);
+ test__muldi3(0, -81985529216486895, 0);
+ test__muldi3(-81985529216486895, 0, 0);
+
+ test__muldi3(1, 1, 1);
+ test__muldi3(1, 10, 10);
+ test__muldi3(10, 1, 10);
+ test__muldi3(1, 81985529216486895, 81985529216486895);
+ test__muldi3(81985529216486895, 1, 81985529216486895);
+
+ test__muldi3(1, -1, -1);
+ test__muldi3(1, -10, -10);
+ test__muldi3(-10, 1, -10);
+ test__muldi3(1, -81985529216486895, -81985529216486895);
+ test__muldi3(-81985529216486895, 1, -81985529216486895);
+
+ test__muldi3(3037000499, 3037000499, 9223372030926249001);
+ test__muldi3(-3037000499, 3037000499, -9223372030926249001);
+ test__muldi3(3037000499, -3037000499, -9223372030926249001);
+ test__muldi3(-3037000499, -3037000499, 9223372030926249001);
+
+ test__muldi3(4398046511103, 2097152, 9223372036852678656);
+ test__muldi3(-4398046511103, 2097152, -9223372036852678656);
+ test__muldi3(4398046511103, -2097152, -9223372036852678656);
+ test__muldi3(-4398046511103, -2097152, 9223372036852678656);
+
+ test__muldi3(2097152, 4398046511103, 9223372036852678656);
+ test__muldi3(-2097152, 4398046511103, -9223372036852678656);
+ test__muldi3(2097152, -4398046511103, -9223372036852678656);
+ test__muldi3(-2097152, -4398046511103, 9223372036852678656);
+}