X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fgallium%2Fdrivers%2Fnouveau%2Fnouveau_util.h;h=a10114beab98d9ffb9204a448d6ed0d0692cbcc3;hb=9381a2777c1a36c1b88de9edf04141c485569259;hp=c92041ebeba835fc4f5188095d97cfaca890f326;hpb=01de2293d5449ab6ca1d99b007c9ea4f0037fef5;p=mesa.git

diff --git a/src/gallium/drivers/nouveau/nouveau_util.h b/src/gallium/drivers/nouveau/nouveau_util.h
index c92041ebeba..a10114beab9 100644
--- a/src/gallium/drivers/nouveau/nouveau_util.h
+++ b/src/gallium/drivers/nouveau/nouveau_util.h
@@ -61,4 +61,31 @@ nouveau_vbuf_split(unsigned remaining, unsigned overhead, unsigned vpp,
 	return max;
 }
 
+/* Integer base-2 logarithm, rounded towards zero. */
+static INLINE unsigned log2i(unsigned i)
+{
+	unsigned r = 0;
+
+	if (i & 0xffff0000) {
+		i >>= 16;
+		r += 16;
+	}
+	if (i & 0x0000ff00) {
+		i >>= 8;
+		r += 8;
+	}
+	if (i & 0x000000f0) {
+		i >>= 4;
+		r += 4;
+	}
+	if (i & 0x0000000c) {
+		i >>= 2;
+		r += 2;
+	}
+	if (i & 0x00000002) {
+		r += 1;
+	}
+	return r;
+}
+
 #endif