diff --git a/llvm/lib/Target/PowerPC/PPCInstrAltivec.td b/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
index 4c297bd1789b..6cac3ec40d86 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrAltivec.td
@@ -93,6 +93,15 @@ class VX2_Int<bits<11> xo, string opc, Intrinsic IntID>
 def IMPLICIT_DEF_VRRC : Pseudo<(ops VRRC:$rD), "; $rD = IMPLICIT_DEF_VRRC",
                                [(set VRRC:$rD, (v4f32 (undef)))]>;
 
+let noResults = 1 in {
+def DSS   : DSS_Form<822, (ops u5imm:$A, u5imm:$STRM,u5imm:$ZERO1,u5imm:$ZERO2),
+                     "dss $STRM, $A", LdStGeneral /*FIXME*/, []>;
+def DST   : DSS_Form<342, (ops u5imm:$T, u5imm:$STRM, GPRC:$rA, GPRC:$rB),
+                     "dst $rA, $rB, $STRM, $T", LdStGeneral /*FIXME*/, []>;
+def DSTST : DSS_Form<374, (ops u5imm:$T, u5imm:$STRM, GPRC:$rA, GPRC:$rB),
+                   "dstst $rA, $rB, $STRM, $T", LdStGeneral /*FIXME*/, []>;
+}
+
 def MFVSCR : VXForm_4<1540, (ops VRRC:$vD),
                       "mfvcr $vD", LdStGeneral,
                       [(set VRRC:$vD, (int_ppc_altivec_mfvscr))]>; 
@@ -431,6 +440,18 @@ def V_SET0 : VXForm_setzero<1220, (ops VRRC:$vD),
 // Additional Altivec Patterns
 //
 
+// DS* intrinsics.
+def : Pat<(int_ppc_altivec_dss imm:$STRM), (DSS 0, imm:$STRM, 0, 0)>;
+def : Pat<(int_ppc_altivec_dssall), (DSS 1, 0, 0, 0)>;
+def : Pat<(int_ppc_altivec_dst GPRC:$rA, GPRC:$rB, imm:$STRM),
+          (DST 0, imm:$STRM, GPRC:$rA, GPRC:$rB)>;
+def : Pat<(int_ppc_altivec_dstt GPRC:$rA, GPRC:$rB, imm:$STRM),
+          (DST 1, imm:$STRM, GPRC:$rA, GPRC:$rB)>;
+def : Pat<(int_ppc_altivec_dstst GPRC:$rA, GPRC:$rB, imm:$STRM),
+          (DSTST 0, imm:$STRM, GPRC:$rA, GPRC:$rB)>;
+def : Pat<(int_ppc_altivec_dststt GPRC:$rA, GPRC:$rB, imm:$STRM),
+          (DSTST 1, imm:$STRM, GPRC:$rA, GPRC:$rB)>;
+
 // Undef/Zero.
 def : Pat<(v16i8 (undef)), (v16i8 (IMPLICIT_DEF_VRRC))>;
 def : Pat<(v8i16 (undef)), (v8i16 (IMPLICIT_DEF_VRRC))>;
diff --git a/llvm/lib/Target/PowerPC/PPCInstrFormats.td b/llvm/lib/Target/PowerPC/PPCInstrFormats.td
index c3a78e65bf90..10ac79b1c2e3 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrFormats.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrFormats.td
@@ -325,6 +325,26 @@ class XForm_28<bits<6> opcode, bits<10> xo, dag OL, string asmstr,
   : XForm_base_r3xo<opcode, xo, OL, asmstr, itin, pattern> {
 }
 
+// DSS_Form - Form X instruction, used for altivec dss* instructions.
+class DSS_Form<bits<10> xo, dag OL, string asmstr, 
+                      InstrItinClass itin, list<dag> pattern>
+  : I<31, OL, asmstr, itin> {
+  bits<1> T;
+  bits<2> STRM;
+  bits<5> A;
+  bits<5> B;
+
+  let Pattern = pattern;
+
+  let Inst{6}     = T;
+  let Inst{7-8}   = 0;
+  let Inst{9-10}  = STRM;
+  let Inst{11-15} = A;
+  let Inst{16-20} = B;
+  let Inst{21-30} = xo;
+  let Inst{31}    = 0;
+}
+
 // 1.7.7 XL-Form
 class XLForm_1<bits<6> opcode, bits<10> xo, dag OL, string asmstr,
                InstrItinClass itin>
@@ -589,6 +609,8 @@ class MDForm_1<bits<6> opcode, bits<3> xo, dag OL, string asmstr,
   let Inst{31}    = RC;
 }
 
+
+
 // E-1 VA-Form
 
 // VAForm_1 - DACB ordering.
diff --git a/llvm/lib/Target/PowerPC/README_ALTIVEC.txt b/llvm/lib/Target/PowerPC/README_ALTIVEC.txt
index 0a338dac6a2a..78505120f7cd 100644
--- a/llvm/lib/Target/PowerPC/README_ALTIVEC.txt
+++ b/llvm/lib/Target/PowerPC/README_ALTIVEC.txt
@@ -47,13 +47,6 @@ altivec instructions.  Examples
 
 //===----------------------------------------------------------------------===//
 
-Missing intrinsics:
-
-ds*
-vsel (some aliases only accessible using builtins)
-
-//===----------------------------------------------------------------------===//
-
 FABS/FNEG can be codegen'd with the appropriate and/xor of -0.0.
 
 //===----------------------------------------------------------------------===//