--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/run/mini/assign.d	Mon Jan 10 19:47:18 2011 +0100
@@ -0,0 +1,23 @@
+module assign;
+
+// this is taken from std.intrinsic from gdc
+
+int mybtc(uint *p, uint bitnum)
+{
+    uint * q = p + (bitnum / (uint.sizeof*8));
+    uint mask = 1 << (bitnum & ((uint.sizeof*8) - 1));
+    int result = *q & mask;
+    *q ^= mask;
+    return result ? -1 : 0;
+}
+
+void main()
+{
+    uint i = 0xFFFF_FFFF;
+    int r = mybtc(&i, 31);
+    assert(r);
+    assert(i == 0x7FFF_FFFF);
+    r = mybtc(&i, 31);
+    assert(!r);
+    assert(i == 0xFFFF_FFFF);
+}