Fix the broken encodings for the VFP vmov.f32 and vmov.f64 instructio…

…ns, as well as the comments that explain them incorrectly.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136707 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMInstrVFP.td

@@ -36,13 +36,15 @@ def vfp_f32imm : Operand<f32>,
       return ARM::getVFPf32Imm(N->getValueAPF()) != -1;
     }]> {
   let PrintMethod = "printVFPf32ImmOperand";
+  let DecoderMethod = "DecodeVFPfpImm";
 }
 
 def vfp_f64imm : Operand<f64>,
                  PatLeaf<(f64 fpimm), [{
       return ARM::getVFPf64Imm(N->getValueAPF()) != -1;
     }]> {
   let PrintMethod = "printVFPf64ImmOperand";
+  let DecoderMethod = "DecodeVFPfpImm";
 }
 
 
@@ -1091,9 +1093,9 @@ def FCONSTD : VFPAI<(outs DPR:$Dd), (ins vfp_f64imm:$imm),
   // Encode instruction operands.
   let Inst{15-12} = Dd{3-0};
   let Inst{22}    = Dd{4};
-  let Inst{19}    = imm{31};
-  let Inst{18-16} = imm{22-20};
-  let Inst{3-0}   = imm{19-16};
+  let Inst{19}    = imm{31};    // The immediate is handled as a float.
+  let Inst{18-16} = imm{25-23};
+  let Inst{3-0}   = imm{22-19};
 
   // Encode remaining instruction bits.
   let Inst{27-23} = 0b11101;
@@ -1114,9 +1116,9 @@ def FCONSTS : VFPAI<(outs SPR:$Sd), (ins vfp_f32imm:$imm),
   // Encode instruction operands.
   let Inst{15-12} = Sd{4-1};
   let Inst{22}    = Sd{0};
-  let Inst{19}    = imm{31};    // The immediate is handled as a double.
-  let Inst{18-16} = imm{22-20};
-  let Inst{3-0}   = imm{19-16};
+  let Inst{19}    = imm{31};    // The immediate is handled as a float.
+  let Inst{18-16} = imm{25-23};
+  let Inst{3-0}   = imm{22-19};
 
   // Encode remaining instruction bits.
   let Inst{27-23} = 0b11101;