minor fixes

[ia32rtools.git] / c_auto.h

diff --git a/c_auto.h b/c_auto.h
index 8ae2eee..84eb4e3 100644 (file)
--- a/c_auto.h
+++ b/c_auto.h
@@ -66,4 +66,40 @@ static inline int do_parity(unsigned int v)
 #define barrier() \
   asm volatile("" ::: "memory")
 
+/* gcc always emits vldr/vstr which requires alignment,
+ * so in some cases these unaligned helpers are needed */
+#ifdef __ARM_NEON__
+
+static inline float float_load(u32 ptr)
+{
+       register float v asm("s0");
+
+       asm ("vld1.32  {d0[0]}, [%1]"
+               : "=t"(v) : "r"(ptr));
+
+       return v;
+}
+
+static inline void float_store(float v, u32 ptr)
+{
+       register float v1 asm("s0") = v;
+
+       asm ("vst1.32  {d0[0]}, [%1]"
+               : : "t"(v1), "r"(ptr) : "memory");
+}
+
+#else
+
+static inline float float_load(u32 ptr)
+{
+       return *(const float *)ptr;
+}
+
+static inline void float_store(float v, u32 ptr)
+{
+       *(float *)ptr = v;
+}
+
+#endif
+
 // vim:ts=2:sw=2:expandtab