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Multiple _NOP being optimized into a single instruction?
I haven't quite characterized what's happening - sometimes the nops are optimized out altogether, sometimes multiple are combined into a single instruction, sometimes (especially...
Thursday, 13 October 2016 - 05:30
ISR prologue/epilogue optimization in avr-gcc
Sort of a question about how avr-gcc optimizes ISRs:   It seem like r0,r1, and sreg always get stored/restored whether they need it or not. This adds up to 14 cycles to an...
Sunday, 9 October 2016 - 01:21
How to permanently bind a variable to a register?
I saw this note in the FAQ but it doesn't seem to be working for me: register unsigned char counter asm("r3"); main.c:14:32: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘...
Monday, 26 September 2016 - 13:33