1 files changed, 25 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/divti3.zig b/lib/std/special/compiler_rt/divti3.zig
new file mode 100644
index 0000000000..477ce2cb98
--- /dev/null
+++ b/lib/std/special/compiler_rt/divti3.zig
@@ -0,0 +1,25 @@
+const udivmod = @import("udivmod.zig").udivmod;
+const builtin = @import("builtin");
+
+pub extern fn __divti3(a: i128, b: i128) i128 {
+    @setRuntimeSafety(builtin.is_test);
+
+    const s_a = a >> (i128.bit_count - 1);
+    const s_b = b >> (i128.bit_count - 1);
+
+    const an = (a ^ s_a) -% s_a;
+    const bn = (b ^ s_b) -% s_b;
+
+    const r = udivmod(u128, @bitCast(u128, an), @bitCast(u128, bn), null);
+    const s = s_a ^ s_b;
+    return (@bitCast(i128, r) ^ s) -% s;
+}
+
+const v128 = @Vector(2, u64);
+pub extern fn __divti3_windows_x86_64(a: v128, b: v128) v128 {
+    return @bitCast(v128, @inlineCall(__divti3, @bitCast(i128, a), @bitCast(i128, b)));
+}
+
+test "import divti3" {
+    _ = @import("divti3_test.zig");
+}