common: Add vkd3d_log2i_ceil.

Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
2022-02-23 16:22:26 +01:00 · 2022-02-23 16:22:26 +01:00 · dc752991ef
parent c29d005ef4
commit dc752991ef
1 changed files with 8 additions and 0 deletions
--- a/include/private/vkd3d_common.h
+++ b/include/private/vkd3d_common.h
@ -208,6 +208,14 @@ static inline unsigned int vkd3d_log2i(unsigned int x)
 #endif
 }

+static inline unsigned int vkd3d_log2i_ceil(unsigned int x)
+{
+    if (x == 1)
+        return 0;
+    else
+        return vkd3d_log2i(x - 1) + 1;
+}
+
 static inline int ascii_isupper(int c)
 {
    return 'A' <= c && c <= 'Z';