ref: 27ff6876d02ff5d326d6ee13d2466a6e4a3e0925
dir: /sys/src/libc/spim/tas.s/
/* * 4K tas for spim */ #define LL(base, rt) WORD $((060<<26)|((base)<<21)|((rt)<<16)) #define SC(base, rt) WORD $((070<<26)|((base)<<21)|((rt)<<16)) #define NOOP WORD $0x27 TEXT _tas(SB), $0 MOVW R1, R2 /* address of key */ tas1: MOVW $1, R3 LL(2, 1) NOOP SC(2, 3) NOOP BEQ R3, tas1 RET