[mips] Modify definitions of floating point multiply-add/sub instructions.

No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170073 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 46 insertions, 12 deletions

diff --git a/lib/Target/Mips/MipsInstrFPU.td b/lib/Target/Mips/MipsInstrFPU.td
index da1d207210..e3cac64f22 100644
--- a/lib/Target/Mips/MipsInstrFPU.td
+++ b/lib/Target/Mips/MipsInstrFPU.td
@@ -248,6 +248,19 @@ class SW_FT<string opstr, RegisterClass RC, InstrItinClass Itin,
   let DecoderMethod = "DecodeFMem";
 }
 
+class MADDS_FT<string opstr, RegisterClass RC, InstrItinClass Itin,
+               SDPatternOperator OpNode = null_frag> :
+  InstSE<(outs RC:$fd), (ins RC:$fr, RC:$fs, RC:$ft),
+         !strconcat(opstr, "\t$fd, $fr, $fs, $ft"),
+         [(set RC:$fd, (OpNode (fmul RC:$fs, RC:$ft), RC:$fr))], Itin, FrmFR>;
+
+class NMADDS_FT<string opstr, RegisterClass RC, InstrItinClass Itin,
+                SDPatternOperator OpNode = null_frag> :
+  InstSE<(outs RC:$fd), (ins RC:$fr, RC:$fs, RC:$ft),
+         !strconcat(opstr, "\t$fd, $fr, $fs, $ft"),
+         [(set RC:$fd, (fsub fpimm0, (OpNode (fmul RC:$fs, RC:$ft), RC:$fr)))],
+         Itin, FrmFR>;
+
 //===----------------------------------------------------------------------===//
 // Floating Point Instructions
 //===----------------------------------------------------------------------===//
@@ -414,34 +427,38 @@ def FSUB_S : ADDS_FT<"sub.s", FGR32, IIFadd, 0, fsub>, ADDS_FM<0x01, 16>;
 defm FSUB : ADDS_M<"sub.d", IIFadd, 0, fsub>, ADDS_FM<0x01, 17>;
 
 let Predicates = [HasMips32r2, HasStdEnc] in {
-  def MADD_S : FMADDSUB<0x4, 0, "madd.s", fadd, FGR32>;
-  def MSUB_S : FMADDSUB<0x5, 0, "msub.s", fsub, FGR32>;
+  def MADD_S : MADDS_FT<"madd.s", FGR32, IIFmulSingle, fadd>, MADDS_FM<4, 0>;
+  def MSUB_S : MADDS_FT<"msub.s", FGR32, IIFmulSingle, fsub>, MADDS_FM<5, 0>;
 }
 
 let Predicates = [HasMips32r2, NoNaNsFPMath, HasStdEnc] in {
-  def NMADD_S : FNMADDSUB<0x6, 0, "nmadd.s", fadd, FGR32>;
-  def NMSUB_S : FNMADDSUB<0x7, 0, "nmsub.s", fsub, FGR32>;
+  def NMADD_S : NMADDS_FT<"nmadd.s", FGR32, IIFmulSingle, fadd>, MADDS_FM<6, 0>;
+  def NMSUB_S : NMADDS_FT<"nmsub.s", FGR32, IIFmulSingle, fsub>, MADDS_FM<7, 0>;
 }
 
 let Predicates = [HasMips32r2, NotFP64bit, HasStdEnc] in {
-  def MADD_D32 : FMADDSUB<0x4, 1, "madd.d", fadd, AFGR64>;
-  def MSUB_D32 : FMADDSUB<0x5, 1, "msub.d", fsub, AFGR64>;
+  def MADD_D32 : MADDS_FT<"madd.d", AFGR64, IIFmulDouble, fadd>, MADDS_FM<4, 1>;
+  def MSUB_D32 : MADDS_FT<"msub.d", AFGR64, IIFmulDouble, fsub>, MADDS_FM<5, 1>;
 }
 
 let Predicates = [HasMips32r2, NotFP64bit, NoNaNsFPMath, HasStdEnc] in {
-  def NMADD_D32 : FNMADDSUB<0x6, 1, "nmadd.d", fadd, AFGR64>;
-  def NMSUB_D32 : FNMADDSUB<0x7, 1, "nmsub.d", fsub, AFGR64>;
+  def NMADD_D32 : NMADDS_FT<"nmadd.d", AFGR64, IIFmulDouble, fadd>,
+                  MADDS_FM<6, 1>;
+  def NMSUB_D32 : NMADDS_FT<"nmsub.d", AFGR64, IIFmulDouble, fsub>,
+                  MADDS_FM<7, 1>;
 }
 
 let Predicates = [HasMips32r2, IsFP64bit, HasStdEnc], isCodeGenOnly=1 in {
-  def MADD_D64 : FMADDSUB<0x4, 1, "madd.d", fadd, FGR64>;
-  def MSUB_D64 : FMADDSUB<0x5, 1, "msub.d", fsub, FGR64>;
+  def MADD_D64 : MADDS_FT<"madd.d", FGR64, IIFmulDouble, fadd>, MADDS_FM<4, 1>;
+  def MSUB_D64 : MADDS_FT<"msub.d", FGR64, IIFmulDouble, fsub>, MADDS_FM<5, 1>;
 }
 
 let Predicates = [HasMips32r2, IsFP64bit, NoNaNsFPMath, HasStdEnc],
     isCodeGenOnly=1 in {
-  def NMADD_D64 : FNMADDSUB<0x6, 1, "nmadd.d", fadd, FGR64>;
-  def NMSUB_D64 : FNMADDSUB<0x7, 1, "nmsub.d", fsub, FGR64>;
+  def NMADD_D64 : NMADDS_FT<"nmadd.d", FGR64, IIFmulDouble, fadd>,
+                  MADDS_FM<6, 1>;
+  def NMSUB_D64 : NMADDS_FT<"nmsub.d", FGR64, IIFmulDouble, fsub>,
+                  MADDS_FM<7, 1>;
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/lib/Target/Mips/MipsInstrFormats.td b/lib/Target/Mips/MipsInstrFormats.td
index 83c3c63a3a..f09e2c0ad4 100644
--- a/lib/Target/Mips/MipsInstrFormats.td
+++ b/lib/Target/Mips/MipsInstrFormats.td
@@ -406,3 +406,20 @@ class LW_FM<bits<6> op> {
   let Inst{20-16} = rt;
   let Inst{15-0}  = addr{15-0};
 }
+
+class MADDS_FM<bits<3> funct, bits<3> fmt> {
+  bits<5> fd;
+  bits<5> fr;
+  bits<5> fs;
+  bits<5> ft;
+
+  bits<32> Inst;
+
+  let Inst{31-26} = 0x13;
+  let Inst{25-21} = fr;
+  let Inst{20-16} = ft;
+  let Inst{15-11} = fs;
+  let Inst{10-6}  = fd;
+  let Inst{5-3}   = funct;
+  let Inst{2-0}   = fmt;
+}