diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index 646d26709d4..aa5466c192d 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -3226,6 +3226,9 @@ def : InstAlias<"crnot $bx, $by", (CRNOR crbitrc:$bx, crbitrc:$by, crbitrc:$by)>
 def : InstAlias<"mtxer $Rx", (MTSPR 1, gprc:$Rx)>;
 def : InstAlias<"mfxer $Rx", (MFSPR gprc:$Rx, 1)>;
 
+def : InstAlias<"mfrtcu $Rx", (MFSPR gprc:$Rx, 4)>;
+def : InstAlias<"mfrtcl $Rx", (MFSPR gprc:$Rx, 5)>;
+
 def : InstAlias<"mtdscr $Rx", (MTSPR 17, gprc:$Rx)>;
 def : InstAlias<"mfdscr $Rx", (MFSPR gprc:$Rx, 17)>;
 
diff --git a/test/MC/PowerPC/ppc64-encoding-ext.s b/test/MC/PowerPC/ppc64-encoding-ext.s
index c23ef8f4482..0729154c5ca 100644
--- a/test/MC/PowerPC/ppc64-encoding-ext.s
+++ b/test/MC/PowerPC/ppc64-encoding-ext.s
@@ -3419,6 +3419,12 @@
 # CHECK-BE: mfspr 2, 1                      # encoding: [0x7c,0x41,0x02,0xa6]
 # CHECK-LE: mfspr 2, 1                      # encoding: [0xa6,0x02,0x41,0x7c]
             mfxer 2
+# CHECK-BE: mfspr 2, 4                      # encoding: [0x7c,0x44,0x02,0xa6]
+# CHECK-LE: mfspr 2, 4                      # encoding: [0xa6,0x02,0x44,0x7c]
+            mfrtcu 2
+# CHECK-BE: mfspr 2, 5                      # encoding: [0x7c,0x45,0x02,0xa6]
+# CHECK-LE: mfspr 2, 5                      # encoding: [0xa6,0x02,0x45,0x7c]
+            mfrtcl 2
 # CHECK-BE: mtspr 17, 2                     # encoding: [0x7c,0x51,0x03,0xa6]
 # CHECK-LE: mtspr 17, 2                     # encoding: [0xa6,0x03,0x51,0x7c]
             mtdscr 2