On Wed, Feb 22, 2017 at 04:11:39AM +0900, Stafford Horne wrote: > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%3) \n" > + " l.srli %1, %0, 16 \n" > + " l.andi %2, %0, 0xffff \n" > + " l.sfeq %1, %2 \n" > + " l.bnf 1f \n" > + " l.ori %1, r0, 1 \n" > + " l.add %0, %0, %4 \n" > + " l.swa 0(%3), %0 \n" > + " l.bnf 1b \n" > + " l.ori %1, r0, 0 \n" > + "1: \n" > + : "=&r" (slock), "=&r" (contended), "=&r" (tmp) > + : "r" (&lock->slock), "r" (1 << TICKET_SHIFT) > + : "cc", "memory");
> + __asm__ __volatile__( > + "1: l.lwa %0, 0(%1) \n" > + " l.sfeqi %0, 0 \n" > + " l.bnf 1f \n" > + " l.nop \n" > + " l.swa 0(%1), %2 \n" > + " l.bnf 1b \n" > + " l.nop \n" > + "1: \n" > + : "=&r" (tmp) > + : "r" (&rw->lock), "r" (0x80000000) > + : "cc", "memory"); > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%1) \n" > + " l.sfeqi %0, 0 \n" > + " l.bnf 1f \n" > + " l.nop \n" > + " l.swa 0(%1), %2 \n" > + " l.bnf 1b \n" > + " l.nop \n" > + "1: \n" > + : "=&r" (contended) > + : "r" (&rw->lock), "r" (0x80000000) > + : "cc", "memory"); > + __asm__ __volatile__( > + "1: l.lwa %0, 0(%1) \n" > + " l.sfltsi %0, -1 \n" > + " l.bf 1f \n" > + " l.addi %0, %0, 1 \n" > + " l.swa 0(%1), %0 \n" > + " l.bnf 1b \n" > + " l.nop \n" > + "1: \n" > + : "=&r" (contended) > + : "r" (&rw->lock) > + : "cc", "memory"); More asm with 'duplicate' labels.
