minor fixes

[ia32rtools.git] / c_auto.h

diff --git a/c_auto.h b/c_auto.h
index b3b1afc..84eb4e3 100644 (file)
--- a/c_auto.h
+++ b/c_auto.h
@@ -63,4 +63,43 @@ static inline int do_parity(unsigned int v)
   printf("%s:%d: skip_code_abort\n", __FILE__, __LINE__); \
   *(volatile int *)0 = 1
 
+#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