re-fix vfprintf temporary buffer logic

[musl] / arch / arm / atomic_arch.h

diff --git a/arch/arm/atomic_arch.h b/arch/arm/atomic_arch.h
index d6af84d..62458b4 100644 (file)
--- a/arch/arm/atomic_arch.h
+++ b/arch/arm/atomic_arch.h
@@ -7,8 +7,8 @@
 extern uintptr_t __attribute__((__visibility__("hidden")))
        __a_cas_ptr, __a_barrier_ptr;
 
-#if ((__ARM_ARCH_6__ || __ARM_ARCH_6K__ || __ARM_ARCH_6ZK__) && !__thumb__) \
- || __ARM_ARCH_7A__ || __ARM_ARCH_7R__ ||  __ARM_ARCH >= 7
+#if ((__ARM_ARCH_6__ || __ARM_ARCH_6K__ || __ARM_ARCH_6KZ__ || __ARM_ARCH_6ZK__) && !__thumb__) \
+ || __ARM_ARCH_6T2__ || __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
 
 #define a_ll a_ll
 static inline int a_ll(volatile int *p)
@@ -81,3 +81,26 @@ static inline void a_crash()
 #endif
                : : : "memory");
 }
+
+#if __ARM_ARCH >= 5
+
+#define a_clz_32 a_clz_32
+static inline int a_clz_32(uint32_t x)
+{
+       __asm__ ("clz %0, %1" : "=r"(x) : "r"(x));
+       return x;
+}
+
+#if __ARM_ARCH_6T2__ || __ARM_ARCH_7A__ || __ARM_ARCH_7R__ || __ARM_ARCH >= 7
+
+#define a_ctz_32 a_ctz_32
+static inline int a_ctz_32(uint32_t x)
+{
+       uint32_t xr;
+       __asm__ ("rbit %0, %1" : "=r"(xr) : "r"(x));
+       return a_clz_32(xr);
+}
+
+#endif
+
+#endif