linux-kernel - [PATCH] parisc: test off by one in sgl_frem() and dbl

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Date:	Sun, 27 Dec 2009 14:21:44 +0100
From:	Roel Kluin <roel.kluin@...il.com>
To:	Kyle McMartin <kyle@...artin.ca>, Helge Deller <deller@....de>,
	"James E.J. Bottomley" <jejb@...isc-linux.org>,
	linux-parisc@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH] parisc: test off by one in sgl_frem() and dbl_frem()

With `while (stepcount-- > 0)' stepcount reaches -1 after the loop.

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
 arch/parisc/math-emu/dfrem.c |    2 +-
 arch/parisc/math-emu/sfrem.c |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

Unless I am missing something?

diff --git a/arch/parisc/math-emu/dfrem.c b/arch/parisc/math-emu/dfrem.c
index b983785..3283445 100644
--- a/arch/parisc/math-emu/dfrem.c
+++ b/arch/parisc/math-emu/dfrem.c
@@ -234,7 +234,7 @@ dbl_frem (dbl_floating_point * srcptr1, dbl_floating_point * srcptr2,
 		Dbl_subtract(opnd1p1,opnd1p2,opnd2p1,opnd2p2,opnd1p1,opnd1p2);
 		roundup = TRUE;
 	}
-	if (stepcount > 0 || Dbl_iszero(opnd1p1,opnd1p2)) {
+	if (stepcount >= 0 || Dbl_iszero(opnd1p1,opnd1p2)) {
 		/* division is exact, remainder is zero */
 		Dbl_setzero_exponentmantissa(resultp1,resultp2);
 		Dbl_copytoptr(resultp1,resultp2,dstptr);
diff --git a/arch/parisc/math-emu/sfrem.c b/arch/parisc/math-emu/sfrem.c
index 3a1b7a3..ad87832 100644
--- a/arch/parisc/math-emu/sfrem.c
+++ b/arch/parisc/math-emu/sfrem.c
@@ -229,7 +229,7 @@ sgl_frem (sgl_floating_point * srcptr1, sgl_floating_point * srcptr2,
 		Sgl_subtract(opnd1,opnd2,opnd1);
 		roundup = TRUE;
 	}
-	if (stepcount > 0 || Sgl_iszero(opnd1)) {
+	if (stepcount >= 0 || Sgl_iszero(opnd1)) {
 		/* division is exact, remainder is zero */
 		Sgl_setzero_exponentmantissa(result);
 		*dstptr = result;
--
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