diff --git a/llvm/lib/Target/PowerPC/PPCInstrInfo.td b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
index 1b11cd878233..5a4df7ac154e 100644
--- a/llvm/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/llvm/lib/Target/PowerPC/PPCInstrInfo.td
@@ -3243,6 +3243,12 @@ def : InstAlias<"mfsrr0 $Rx", (MFSPR gprc:$Rx, 26)>;
 def : InstAlias<"mtsrr1 $Rx", (MTSPR 27, gprc:$Rx)>;
 def : InstAlias<"mfsrr1 $Rx", (MFSPR gprc:$Rx, 27)>;
 
+def : InstAlias<"mtsrr2 $Rx", (MTSPR 990, gprc:$Rx)>, Requires<[IsPPC4xx]>;
+def : InstAlias<"mfsrr2 $Rx", (MFSPR gprc:$Rx, 990)>, Requires<[IsPPC4xx]>;
+
+def : InstAlias<"mtsrr3 $Rx", (MTSPR 991, gprc:$Rx)>, Requires<[IsPPC4xx]>;
+def : InstAlias<"mfsrr3 $Rx", (MFSPR gprc:$Rx, 991)>, Requires<[IsPPC4xx]>;
+
 def : InstAlias<"mtcfar $Rx", (MTSPR 28, gprc:$Rx)>;
 def : InstAlias<"mfcfar $Rx", (MFSPR gprc:$Rx, 28)>;
 
diff --git a/llvm/test/MC/PowerPC/ppc64-encoding-4xx.s b/llvm/test/MC/PowerPC/ppc64-encoding-4xx.s
index b973b0fdeaab..f94eab0b99fb 100644
--- a/llvm/test/MC/PowerPC/ppc64-encoding-4xx.s
+++ b/llvm/test/MC/PowerPC/ppc64-encoding-4xx.s
@@ -97,3 +97,16 @@
 # CHECK-BE: ici 14                          # encoding: [0x7d,0xc0,0x07,0x8c]
 # CHECK-LE: ici 14                          # encoding: [0x8c,0x07,0xc0,0x7d]
             ici 14
+
+# CHECK-BE: mfspr 2, 990                    # encoding: [0x7c,0x5e,0xf2,0xa6]
+# CHECK-LE: mfspr 2, 990                    # encoding: [0xa6,0xf2,0x5e,0x7c]
+            mfsrr2 2
+# CHECK-BE: mtspr 990, 2                    # encoding: [0x7c,0x5e,0xf3,0xa6]
+# CHECK-LE: mtspr 990, 2                    # encoding: [0xa6,0xf3,0x5e,0x7c]
+            mtsrr2 2
+# CHECK-BE: mfspr 2, 991                    # encoding: [0x7c,0x5f,0xf2,0xa6]
+# CHECK-LE: mfspr 2, 991                    # encoding: [0xa6,0xf2,0x5f,0x7c]
+            mfsrr3 2
+# CHECK-BE: mtspr 991, 2                    # encoding: [0x7c,0x5f,0xf3,0xa6]
+# CHECK-LE: mtspr 991, 2                    # encoding: [0xa6,0xf3,0x5f,0x7c]
+            mtsrr3 2