gallium/auxiliary: Add u_bitcast.h header.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

2 files changed, 58 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/Makefile.sources b/src/gallium/auxiliary/Makefile.sources
index e0311bf..26f7eee 100644
--- a/src/gallium/auxiliary/Makefile.sources
+++ b/src/gallium/auxiliary/Makefile.sources
@@ -175,6 +175,7 @@ C_SOURCES := \
 	translate/translate_generic.c \
 	translate/translate_sse.c \
 	util/dbghelp.h \
+	util/u_bitcast.h \
 	util/u_bitmask.c \
 	util/u_bitmask.h \
 	util/u_blend.h \
diff --git a/src/gallium/auxiliary/util/u_bitcast.h b/src/gallium/auxiliary/util/u_bitcast.h
new file mode 100644
index 0000000..b1f9938
--- /dev/null
+++ b/src/gallium/auxiliary/util/u_bitcast.h
@@ -0,0 +1,57 @@
+/**************************************************************************
+ *
+ * Copyright © 2016 Intel Corporation
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef U_BITCAST_H_
+#define U_BITCAST_H_
+
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static inline unsigned
+u_bitcast_f2u(float f)
+{
+   unsigned u;
+   memcpy(&u, &f, sizeof(u));
+   return u;
+}
+
+static inline float
+u_bitcast_u2f(unsigned u)
+{
+   float f;
+   memcpy(&f, &u, sizeof(f));
+   return f;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* U_BITCAST_H_ */