X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=arch%2Fi386%2Fatomic.h;h=bf3c336e6e30ceda2aca4d63ee257e0dc9b65f66;hb=1c76683cb4377a481dc1085b63170bb276512267;hp=e74e45352574859ed06fbfea614750068846c623;hpb=a5bf06c035168122725ec32537f99ab1e6c8432c;p=musl

diff --git a/arch/i386/atomic.h b/arch/i386/atomic.h
index e74e4535..bf3c336e 100644
--- a/arch/i386/atomic.h
+++ b/arch/i386/atomic.h
@@ -49,6 +49,13 @@ static inline long a_cas_l(volatile void *p, long t, long s)
 	return t;
 }
 
+static inline int a_cas(volatile int *p, int t, int s)
+{
+	__asm__( "lock ; cmpxchg %3, %1"
+		: "=a"(t), "=m"(*p) : "a"(t), "r"(s) : "memory" );
+	return t;
+}
+
 static inline void *a_swap_p(void *volatile *x, void *v)
 {
 	__asm__( "xchg %0, %1" : "=r"(v), "=m"(*(void **)x) : "0"(v) : "memory" );