--- a/mm7_1.cpp	Tue Sep 17 20:15:56 2013 +0200
+++ b/mm7_1.cpp	Tue Sep 17 19:24:23 2013 +0100
@@ -52,7 +52,7 @@
   return ((__int64)a1 << 16) / a2;
 }
 
-__int64 fixpoint_mul(int a1, int a2)
+__int64 fixpoint_sub_unknown(int a1, int a2)
 {
   return (((__int64)a1 << 16) * a2) >> 16;
 }
@@ -61,24 +61,16 @@
 //----- (0042EBBE) --------------------------------------------------------
 //----- (004453C0) mm6-----------------------------------------------------
 //----- (004A1760) mm6_chinese---------------------------------------------
-__int64 fixpoint_sub0(int a1, int a2)
+__int64 fixpoint_mul(int a1, int a2)
 {
   return ((__int64)a1 * (__int64)a2) >> 16;
 }
-__int64 fixpoint_sub2(int a1, int a2)
-{
-  signed __int64 v3; // qtt@1
-
-  LODWORD(v3) = a1 << 16;
-  HIDWORD(v3) = a1 >> 16;
-  return v3 / a2;
-}
 
 __int64 fixpoint_dot(int x1, int x2, int y1, int y2, int z1, int z2)
 {
-  return fixpoint_sub0(x1, x2) +
-         fixpoint_sub0(y1, y2) +
-         fixpoint_sub0(z1, z2);
+  return fixpoint_mul(x1, x2) +
+         fixpoint_mul(y1, y2) +
+         fixpoint_mul(z1, z2);
 }
 
 //----- (0041D20D) --------------------------------------------------------