diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index c89d7a12e3..a77330eb83 100644
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2012-08-29  Peter Bergner  <bergner@vnet.ibm.com>
+
+	* ppc-opc.c (VXASHB_MASK): New define.
+	(powerpc_opcodes) <vsldoi>: Use VXASHB_MASK.
+
 2012-08-28  Peter Bergner  <bergner@vnet.ibm.com>
 
 	* ppc-opc.c (UIMM4, UIMM3, UIMM2, VXVA_MASK, VXVB_MASK, VXVAVB_MASK,
diff --git a/opcodes/ppc-opc.c b/opcodes/ppc-opc.c
index 57c075d7e9..6ebcc90d66 100644
--- a/opcodes/ppc-opc.c
+++ b/opcodes/ppc-opc.c
@@ -2348,6 +2348,9 @@ extract_vleil (unsigned long insn,
 /* The mask for an VA form instruction.  */
 #define VXA_MASK VXA(0x3f, 0x3f)
 
+/* A VXA_MASK with a SHB field.  */
+#define VXASHB_MASK (VXA_MASK | (1 << 10))
+
 /* A VXR form instruction.  */
 #define VXR(op, xop, rc) (OP (op) | (((rc) & 1) << 10) | (((unsigned long)(xop)) & 0x3ff))
 
@@ -2837,7 +2840,7 @@ const struct powerpc_opcode powerpc_opcodes[] = {
 {"vsel",	VXA(4,	42),	VXA_MASK,    PPCVEC|PPCVLE, PPCNONE,	{VD, VA, VB, VC}},
 {"ps_add.",	A  (4,	21,1),	AFRC_MASK,   PPCPS,	PPCNONE,	{FRT, FRA, FRB}},
 {"vperm",	VXA(4,	43),	VXA_MASK,    PPCVEC|PPCVLE, PPCNONE,	{VD, VA, VB, VC}},
-{"vsldoi",	VXA(4,	44),	VXA_MASK,    PPCVEC|PPCVLE, PPCNONE,	{VD, VA, VB, SHB}},
+{"vsldoi",	VXA(4,	44),	VXASHB_MASK, PPCVEC|PPCVLE, PPCNONE,	{VD, VA, VB, SHB}},
 {"ps_sel",	A  (4,	23,0),	A_MASK,      PPCPS,	PPCNONE,	{FRT, FRA, FRC, FRB}},
 {"vmaddfp",	VXA(4,	46),	VXA_MASK,    PPCVEC|PPCVLE, PPCNONE,	{VD, VA, VC, VB}},
 {"ps_sel.",	A  (4,	23,1),	A_MASK,      PPCPS,	PPCNONE,	{FRT, FRA, FRC, FRB}},