Author: marius
Date: Tue May 10 21:18:45 2011
New Revision: 221750
URL: http://svn.freebsd.org/changeset/base/221750
Log:
Add an ATOMIC_CLEAR_LONG.
Modified:
head/sys/sparc64/include/asmacros.h
Modified: head/sys/sparc64/include/asmacros.h
==============================================================================
--- head/sys/sparc64/include/asmacros.h Tue May 10 18:44:40 2011
(r221749)
+++ head/sys/sparc64/include/asmacros.h Tue May 10 21:18:45 2011
(r221750)
@@ -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
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