📄 ffs.s
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! .seg "data"! .asciz "@(#)ffs.s 1.1 92/07/30 Copyr 1987 Sun Micro" .seg "text"#include <sun4/asm_linkage.h> ENTRY(ffs) tst %o0 ! if zero, done bz 2f clr %o1 ! delay slot, return zero if no bit set1: inc %o1 ! bit that will get checked btst 1, %o0 be 1b ! if bit is zero, keep checking srl %o0, 1, %o0 ! shift input right until we hit a 1 bit2: retl mov %o1, %o0 ! return value is in o1
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