alt Hacker NewsThanks! I had a feeling there was something out there, but couldn't easily find it. I can see this is well optimized for speed, but the RAM usage looks scary from the perspective of a really memory constrained chip.
On the RP2350, a load from memory and a move-immediate both take 1 cycle, because there's a separate data bus to fast SRAM. If I did want more speed and didn't mind an expansion in font size, I could store each glyph in its own byte/word and avoid the ubfx instruction. But on this chip, for a reasonable speed/space tradeoff I'm going to optimize for space every time.
Indeed, it's not clear that my stuff would have any utility in today's higher-end CPUs, either. But it was fun and zippy in the Motorola 680x0 days (I miss writing to the frame buffer). Certainly this is just related to your stuff, but with different goals never mind wildly different time/space trade-off. (Hi, Raph!)