Cycles: ensure any SSE data is allocated 16 byte aligned, happens automatically

on many platforms but is not assured everywhere.

1 files changed, 24 insertions, 0 deletions

diff --git a/intern/cycles/util/util_types.h b/intern/cycles/util/util_types.h
index a67c55acf3d..891fb82d06b 100644
--- a/intern/cycles/util/util_types.h
+++ b/intern/cycles/util/util_types.h
@@ -552,6 +552,30 @@ template<size_t i0, size_t i1, size_t i2, size_t i3> __device_inline const __m12
 }
 #endif
 
+#ifndef __KERNEL_GPU__
+
+static inline void *malloc_aligned(size_t size, size_t alignment)
+{
+	void *data = (void*)malloc(size + sizeof(void*) + alignment - 1);
+
+	union { void *ptr; size_t offset; } u;
+	u.ptr = (char*)data + sizeof(void*);
+	u.offset = (u.offset + alignment - 1) & ~(alignment - 1);
+	*(((void**)u.ptr) - 1) = data;
+
+	return u.ptr;
+}
+
+static inline void free_aligned(void *ptr)
+{
+	if(ptr) {
+		void *data = *(((void**)ptr) - 1);
+		free(data);
+	}
+}
+
+#endif
+
 CCL_NAMESPACE_END
 
 #endif /* __UTIL_TYPES_H__ */