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Add an ATOMIC_CLEAR_INT macro.

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Submitted by:	tmm
This commit is contained in:
Jake Burkholder 2002-03-13 03:28:47 +00:00
parent b8d4451640
commit 453e54056e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=92198
1 changed files with 13 additions and 2 deletions
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15
sys/sparc64/include/asmacros.h
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@ -59,7 +59,7 @@
9: sub r2, 1, r3 ; \
casa [r1] ASI_N, r2, r3 ; \
cmp r2, r3 ; \
bne,pn %xcc, 9b ; \
bne,pn %icc, 9b ; \
mov r3, r2
/*
@ -70,7 +70,18 @@
9: add r2, 1, r3 ; \
casa [r1] ASI_N, r2, r3 ; \
cmp r2, r3 ; \
bne,pn %xcc, 9b ; \
bne,pn %icc, 9b ; \
mov r3, r2
/*
* Atomically clear a number of bits of an integer in memory.
*/
#define ATOMIC_CLEAR_INT(r1, r2, r3, bits) \
lduw [r1], r2 ; \
9: andn r2, bits, r3 ; \
casa [r1] ASI_N, r2, r3 ; \
cmp r2, r3 ; \
bne,pn %icc, 9b ; \
mov r3, r2
#define PCPU(member) %g7 + PC_ ## member