I was just reading something like this:

   mov 0x40,#0x00
   mov 0x41,#0x00
   mov 0x42,#0x00
   mov 0x43,#0x00
   mov 0x44,#0x00
   mov 0x45,#0x00
   mov 0x46,#0x00
   mov 0x47,#0x00

in an “Reciprocal of X ” routine (anyway I didn’t understand what this means from the source)

I invite you to pronounce here about what you like and what not when you read/write a source code.