From 52b46d9fd64fa89af4e772a675bb2cc3579a0415 Mon Sep 17 00:00:00 2001
From: twinaphex <autechre1024@hotmail.com>
Date: Wed, 21 Nov 2012 20:47:20 +0100
Subject: [PATCH] Implement prev_pow2 - will need this for 360 to round down
 texture formats if passed value too large

---
 general.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/general.h b/general.h
index 90a25b9c75..ee4e8b3e05 100644
--- a/general.h
+++ b/general.h
@@ -632,6 +632,16 @@ static inline uint32_t next_pow2(uint32_t v)
    return v;
 }
 
+static inline uint32_t prev_pow2(uint32_t v)
+{
+   v |= v >> 1;
+   v |= v >> 2;
+   v |= v >> 4;
+   v |= v >> 8;
+   v |= v >> 16;
+   return v - (v >> 1);
+}
+
 static inline uint8_t is_little_endian(void)
 {
    union