From: Joseph Myers <joseph@codesourcery.com>
Date: Fri, 21 Jun 2013 19:00:43 +0000 (+0000)
Subject: Fix bad shift in soft-fp (bug 7006).
X-Git-Tag: glibc-2.18~101
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=8fdda7afb883589b46e423f91f32988373670bfa;p=glibc.git

Fix bad shift in soft-fp (bug 7006).
---

diff --git a/ChangeLog b/ChangeLog
index f3ac800428..5a62155eb4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-06-21  Joseph Myers  <joseph@codesourcery.com>
+
+	[BZ #7006]
+	* soft-fp/op-common.h (_FP_FROM_INT): Do not call _FP_FRAC_SLL
+	with a shift of 0 bits.
+
 2013-06-21  Maciej W. Rozycki  <macro@codesourcery.com>
 
 	* dlfcn/Makefile (tststatic2-ENV): Redefine in terms of
diff --git a/NEWS b/NEWS
index f8aa622692..01d70f4111 100644
--- a/NEWS
+++ b/NEWS
@@ -9,18 +9,18 @@ Version 2.18
 
 * The following bugs are resolved with this release:
 
-  2546, 2560, 5159, 6809, 10060, 10062, 10357, 10686, 11120, 11561, 12387,
-  12515, 12723, 13550, 13889, 13951, 13988, 14142, 14176, 14200, 14256,
-  14280, 14293, 14317, 14327, 14478, 14496, 14582, 14686, 14812, 14888,
-  14894, 14907, 14908, 14909, 14920, 14952, 14964, 14981, 14982, 14985,
-  14991, 14994, 14996, 15000, 15003, 15006, 15007, 15014, 15020, 15023,
-  15036, 15054, 15055, 15062, 15078, 15084, 15085, 15086, 15100, 15160,
-  15214, 15221, 15232, 15234, 15283, 15285, 15287, 15304, 15305, 15307,
-  15309, 15327, 15330, 15335, 15336, 15337, 15339, 15342, 15346, 15359,
-  15361, 15366, 15380, 15381, 15394, 15395, 15405, 15406, 15409, 15416,
-  15418, 15419, 15423, 15424, 15426, 15429, 15431, 15432, 15441, 15442,
-  15448, 15465, 15480, 15485, 15488, 15490, 15492, 15493, 15497, 15506,
-  15529, 15536, 15553, 15577, 15583, 15618, 15627, 15631, 15654.
+  2546, 2560, 5159, 6809, 7006, 10060, 10062, 10357, 10686, 11120, 11561,
+  12387, 12515, 12723, 13550, 13889, 13951, 13988, 14142, 14176, 14200,
+  14256, 14280, 14293, 14317, 14327, 14478, 14496, 14582, 14686, 14812,
+  14888, 14894, 14907, 14908, 14909, 14920, 14952, 14964, 14981, 14982,
+  14985, 14991, 14994, 14996, 15000, 15003, 15006, 15007, 15014, 15020,
+  15023, 15036, 15054, 15055, 15062, 15078, 15084, 15085, 15086, 15100,
+  15160, 15214, 15221, 15232, 15234, 15283, 15285, 15287, 15304, 15305,
+  15307, 15309, 15327, 15330, 15335, 15336, 15337, 15339, 15342, 15346,
+  15359, 15361, 15366, 15380, 15381, 15394, 15395, 15405, 15406, 15409,
+  15416, 15418, 15419, 15423, 15424, 15426, 15429, 15431, 15432, 15441,
+  15442, 15448, 15465, 15480, 15485, 15488, 15490, 15492, 15493, 15497,
+  15506, 15529, 15536, 15553, 15577, 15583, 15618, 15627, 15631, 15654.
 
 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
   #15078).
diff --git a/soft-fp/op-common.h b/soft-fp/op-common.h
index ce472e0d5e..c4acb99161 100644
--- a/soft-fp/op-common.h
+++ b/soft-fp/op-common.h
@@ -1163,8 +1163,9 @@ do {									\
 	  {								     \
 	    /* Exactly representable; shift left.  */			     \
 	    _FP_FRAC_DISASSEMBLE_##wc(X, ur_, rsize);			     \
-	    _FP_FRAC_SLL_##wc(X, (_FP_EXPBIAS_##fs			     \
-				  + _FP_FRACBITS_##fs - 1 - X##_e));	     \
+	    if (_FP_EXPBIAS_##fs + _FP_FRACBITS_##fs - 1 - X##_e > 0)	     \
+	      _FP_FRAC_SLL_##wc(X, (_FP_EXPBIAS_##fs			     \
+				    + _FP_FRACBITS_##fs - 1 - X##_e));	     \
 	  }								     \
 	else								     \
 	  {								     \