From: Russ Cox <rsc@golang.org>
Date: Sat, 6 Jun 2009 06:12:07 +0000 (-0700)
Subject: use cc provided xlog2 instead of system log2.
X-Git-Tag: weekly.2009-11-06~1447
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=8720b4721f76c852c237fad28ce252dad07d785f;p=gostls13.git

use cc provided xlog2 instead of system log2.
(on plan 9 cc calls it log2, but that conflicts here.)
the difference is that xlog2 returns -1 on non powers of 2.
8c was rewriting /10 into /8.

R=ken
OCL=29968
CL=29968
---

diff --git a/src/cmd/8c/cgen.c b/src/cmd/8c/cgen.c
index 8c5bf7b155..1df03ef50c 100644
--- a/src/cmd/8c/cgen.c
+++ b/src/cmd/8c/cgen.c
@@ -346,7 +346,7 @@ cgen(Node *n, Node *nn)
 				c = r->vconst;
 				if(c < 0)
 					c = -c;
-				v = log2(c);
+				v = xlog2(c);
 				if(v < 0)
 					break;
 				/* fall thru */
@@ -609,7 +609,7 @@ cgen(Node *n, Node *nn)
 				c = r->vconst;
 				if(c < 0)
 					c = -c;
-				v = log2(c);
+				v = xlog2(c);
 				if(v < 0)
 					break;
 				/* fall thru */