add a_clz_64 helper function

[musl] / arch / powerpc64 / atomic_arch.h

diff --git a/arch/powerpc64/atomic_arch.h b/arch/powerpc64/atomic_arch.h
index 269d79c..17cabab 100644 (file)
--- a/arch/powerpc64/atomic_arch.h
+++ b/arch/powerpc64/atomic_arch.h
@@ -61,3 +61,10 @@ static inline void a_crash()
 {
        __asm__ __volatile__ (".long 0");
 }
+
+#define a_clz_64 a_clz_64
+static inline int a_clz_64(uint64_t x)
+{
+       __asm__ ("cntlzd %0, %1" : "=r"(x) : "r"(x));
+       return x;
+}