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      1 //====- X86InstrFMA.td - Describe the X86 Instruction Set --*- tablegen -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 //
     10 // This file describes FMA (Fused Multiply-Add) instructions.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 //===----------------------------------------------------------------------===//
     15 // FMA3 - Intel 3 operand Fused Multiply-Add instructions
     16 //===----------------------------------------------------------------------===//
     17 
     18 multiclass fma_rm<bits<8> opc, string OpcodeStr> {
     19   def r : FMA3<opc, MRMSrcReg, (outs VR128:$dst),
     20            (ins VR128:$src1, VR128:$src2),
     21            !strconcat(OpcodeStr, "\t{$src2, $src1, $dst|$dst, $src1, $src2}"),
     22            []>;
     23   def m : FMA3<opc, MRMSrcMem, (outs VR128:$dst),
     24            (ins VR128:$src1, f128mem:$src2),
     25            !strconcat(OpcodeStr, "\t{$src2, $src1, $dst|$dst, $src1, $src2}"),
     26            []>;
     27   def rY : FMA3<opc, MRMSrcReg, (outs VR256:$dst),
     28            (ins VR256:$src1, VR256:$src2),
     29            !strconcat(OpcodeStr, "\t{$src2, $src1, $dst|$dst, $src1, $src2}"),
     30            []>;
     31   def mY : FMA3<opc, MRMSrcMem, (outs VR256:$dst),
     32            (ins VR256:$src1, f256mem:$src2),
     33            !strconcat(OpcodeStr, "\t{$src2, $src1, $dst|$dst, $src1, $src2}"),
     34            []>;
     35 }
     36 
     37 multiclass fma_forms<bits<8> opc132, bits<8> opc213, bits<8> opc231,
     38                      string OpcodeStr, string PackTy> {
     39   defm r132 : fma_rm<opc132, !strconcat(OpcodeStr, !strconcat("132", PackTy))>;
     40   defm r213 : fma_rm<opc213, !strconcat(OpcodeStr, !strconcat("213", PackTy))>;
     41   defm r231 : fma_rm<opc231, !strconcat(OpcodeStr, !strconcat("231", PackTy))>;
     42 }
     43 
     44 let isAsmParserOnly = 1 in {
     45   // Fused Multiply-Add
     46   defm VFMADDPS    : fma_forms<0x98, 0xA8, 0xB8, "vfmadd", "ps">;
     47   defm VFMADDPD    : fma_forms<0x98, 0xA8, 0xB8, "vfmadd", "pd">, VEX_W;
     48   defm VFMADDSUBPS : fma_forms<0x96, 0xA6, 0xB6, "vfmaddsub", "ps">;
     49   defm VFMADDSUBPD : fma_forms<0x96, 0xA6, 0xB6, "vfmaddsub", "pd">, VEX_W;
     50   defm VFMSUBADDPS : fma_forms<0x97, 0xA7, 0xB7, "vfmsubadd", "ps">;
     51   defm VFMSUBADDPD : fma_forms<0x97, 0xA7, 0xB7, "vfmsubadd", "pd">, VEX_W;
     52   defm VFMSUBPS    : fma_forms<0x9A, 0xAA, 0xBA, "vfmsub", "ps">;
     53   defm VFMSUBPD    : fma_forms<0x9A, 0xAA, 0xBA, "vfmsub", "pd">, VEX_W;
     54 
     55   // Fused Negative Multiply-Add
     56   defm VFNMADDPS : fma_forms<0x9C, 0xAC, 0xBC, "vfnmadd", "ps">;
     57   defm VFNMADDPD : fma_forms<0x9C, 0xAC, 0xBC, "vfnmadd", "pd">, VEX_W;
     58   defm VFNMSUBPS : fma_forms<0x9E, 0xAE, 0xBE, "vfnmsub", "ps">;
     59   defm VFNMSUBPD : fma_forms<0x9E, 0xAE, 0xBE, "vfnmsub", "pd">, VEX_W;
     60 }
     61