diff --git a/llvm/test/MC/PowerPC/ppc64-encoding-ext.s b/llvm/test/MC/PowerPC/ppc64-encoding-ext.s
--- a/llvm/test/MC/PowerPC/ppc64-encoding-ext.s
+++ b/llvm/test/MC/PowerPC/ppc64-encoding-ext.s
@@ -3571,6 +3571,11 @@
 # CHECK-LE: mfspr 4, 275                    # encoding: [0xa6,0x42,0x93,0x7c]
             mfsprg %r4, 3
 
+# Bug PR47259
+# CHECK-BE: mfspr 2, 274                    # encoding: [0x7c,0x52,0x42,0xa6]
+# CHECK-LE: mfspr 2, 274                    # encoding: [0xa6,0x42,0x52,0x7c]
+            mfsprg 2, 2
+
 # CHECK-BE: mfspr 2, 272                    # encoding: [0x7c,0x50,0x42,0xa6]
 # CHECK-LE: mfspr 2, 272                    # encoding: [0xa6,0x42,0x50,0x7c]
             mfsprg0 %r2
@@ -3600,6 +3605,11 @@
 # CHECK-LE: mtspr 275, 4                    # encoding: [0xa6,0x43,0x93,0x7c]
             mtsprg 3, %r4
 
+# Bug PR47259
+# CHECK-BE: mtspr 274, 2                    # encoding: [0x7c,0x52,0x43,0xa6]
+# CHECK-LE: mtspr 274, 2                    # encoding: [0xa6,0x43,0x52,0x7c]
+            mtsprg 2, 2
+
 # CHECK-BE: mtspr 272, 4                    # encoding: [0x7c,0x90,0x43,0xa6]
 # CHECK-LE: mtspr 272, 4                    # encoding: [0xa6,0x43,0x90,0x7c]
             mtsprg0 %r4