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Add an ATOMIC_CLEAR_LONG.

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marius 2011-05-10 21:18:45 +00:00
parent 90a44bc764
commit 04f392fe12
1 changed files with 11 additions and 0 deletions
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11
sys/sparc64/include/asmacros.h
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@ -90,6 +90,17 @@
bne,pn %icc, 9b ; \
mov r3, r2
/*
* Atomically clear a number of bits of an u_long in memory.
*/
#define ATOMIC_CLEAR_LONG(r1, r2, r3, bits) \
ldx [r1], r2 ; \
9: andn r2, bits, r3 ; \
casxa [r1] ASI_N, r2, r3 ; \
cmp r2, r3 ; \
bne,pn %icc, 9b ; \
mov r3, r2
#define PCPU(member) PCPU_REG + PC_ ## member
#define PCPU_ADDR(member, reg) \
add PCPU_REG, PC_ ## member, reg