drm: add util_math.h

Used by amdgpu, could be used by other components.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Makefile.sources

@@ -9,7 +9,8 @@ LIBDRM_FILES := \
 	xf86atomic.h \
 	libdrm_macros.h \
 	libdrm_lists.h \
-	util_double_list.h
+	util_double_list.h \
+	util_math.h
 
 LIBDRM_H_FILES := \
 	xf86drm.h \

util_math.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * 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, sublicense,
+ * 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 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 NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) 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 _UTIL_MATH_H_
+#define _UTIL_MATH_H_
+
+#define MIN2( A, B )   ( (A)<(B) ? (A) : (B) )
+#define MAX2( A, B )   ( (A)>(B) ? (A) : (B) )
+
+#define ALIGN( value, alignment )   ( ((value) + (alignment) - 1) & ~((alignment) - 1) )
+
+#endif /*_UTIL_MATH_H_*/