3 ms·
I.e. don’t do what a former coworker did (on x86) and use both the stack pointer and frame pointer registers as index registers for your FFT implementation.
by stephencanon 4y ago
I.e. don’t do what a former coworker did (on x86) and use both the stack pointer and frame pointer registers as index registers for your FFT implementation.
- saagarjha 4y agolmao
- stephencanon 4y agoWhen you only have a few GPR names, this sort of thing starts to look tempting. IIRC it was about a 10% perf win, but we didn’t ship it. (We did ship one that used the frame pointer as an index, though.)