diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index bd58fccce7a..61a0045bd5d 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -407,10 +407,7 @@ def shift_so_reg : Operand<i32>,    // reg reg imm
 }
 
 // so_imm - Match a 32-bit shifter_operand immediate operand, which is an
-// 8-bit immediate rotated by an arbitrary number of bits.  so_imm values are
-// represented in the imm field in the same 12-bit form that they are encoded
-// into so_imm instructions: the 8-bit immediate is the least significant bits
-// [bits 0-7], the 4-bit shift amount is the next 4 bits [bits 8-11].
+// 8-bit immediate rotated by an arbitrary number of bits.
 def so_imm : Operand<i32>, PatLeaf<(imm), [{ return Pred_so_imm(N); }]> {
   let EncoderMethod = "getSOImmOpValue";
   let PrintMethod = "printSOImmOperand";
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index a87f09e4424..60b6b1b331f 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -43,10 +43,7 @@ def t2_so_imm_neg_XFORM : SDNodeXForm<imm, [{
 
 // t2_so_imm - Match a 32-bit immediate operand, which is an
 // 8-bit immediate rotated by an arbitrary number of bits, or an 8-bit
-// immediate splatted into multiple bytes of the word. t2_so_imm values are
-// represented in the imm field in the same 12-bit form that they are encoded
-// into t2_so_imm instructions: the 8-bit immediate is the least significant
-// bits [bits 0-7], the 4-bit shift/splat amount is the next 4 bits [bits 8-11].
+// immediate splatted into multiple bytes of the word.
 def t2_so_imm : Operand<i32>, PatLeaf<(imm), [{ return Pred_t2_so_imm(N); }]> {
   let EncoderMethod = "getT2SOImmOpValue";
 }