ARM was my start with assembler too. But you appear to a have forgotten there ar... | Hacker News

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mattbee on Dec 16, 2013 | parent | context | favorite | on: A Great Old-Timey Game-Programming Hack

ARM was my start with assembler too. But you appear to a have forgotten there are 5 more registers you can use for that blit ;-)

stusmith1977 on Dec 16, 2013 [–]

I can't remember how tight I made it... but I would think you need a couple spare: one for the number of iterations, and another for the screen stride. But yes, spilling registers like SP and LR is a useful trick if you need it.

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