From 91fcd99fe7d03a94f333a0b089e51d4c82a6d898 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Thu, 13 Dec 2012 01:34:09 +0000
Subject: [PATCH] [mips] Modify definitions of floating point comparison
 instructions.

No functionality change.

llvm-svn: 170077
---
 lib/Target/Mips/MipsInstrFPU.td     | 23 ++++++++++++++---------
 lib/Target/Mips/MipsInstrFormats.td | 16 ++++++++++++++++
 2 files changed, 30 insertions(+), 9 deletions(-)

diff --git a/lib/Target/Mips/MipsInstrFPU.td b/lib/Target/Mips/MipsInstrFPU.td
index 878e6b2d1f1..8354a9da350 100644
--- a/lib/Target/Mips/MipsInstrFPU.td
+++ b/lib/Target/Mips/MipsInstrFPU.td
@@ -284,6 +284,14 @@ class BC1F_FT<string opstr, InstrItinClass Itin,
   let Uses = [FCR31];
 }
 
+class CEQS_FT<string typestr, RegisterClass RC, InstrItinClass Itin,
+              SDPatternOperator OpNode = null_frag>  :
+  InstSE<(outs), (ins RC:$fs, RC:$ft, condcode:$cond),
+         !strconcat("c.$cond.", typestr, "\t$fs, $ft"),
+         [(OpNode RC:$fs, RC:$ft, imm:$cond)], Itin, FrmFR> {
+  let Defs = [FCR31];
+}
+
 //===----------------------------------------------------------------------===//
 // Floating Point Instructions
 //===----------------------------------------------------------------------===//
@@ -537,15 +545,12 @@ class FCMP<bits<5> fmt, RegisterClass RC, string typestr> :
       [(MipsFPCmp RC:$fs, RC:$ft, imm:$cc)]>;
 
 /// Floating Point Compare
-let Defs=[FCR31] in {
-  def FCMP_S32 : FCMP<0x10, FGR32, "s">;
-  def FCMP_D32 : FCMP<0x11, AFGR64, "d">,
-      Requires<[NotFP64bit, HasStdEnc]>;
-  def FCMP_D64 : FCMP<0x11, FGR64, "d">,
-      Requires<[IsFP64bit, HasStdEnc]> {
-    let DecoderNamespace = "Mips64";
-  }
-}
+def FCMP_S32 : CEQS_FT<"s", FGR32, IIFcmp, MipsFPCmp>, CEQS_FM<16>;
+def FCMP_D32 : CEQS_FT<"d", AFGR64, IIFcmp, MipsFPCmp>, CEQS_FM<17>,
+               Requires<[NotFP64bit, HasStdEnc]>;
+let DecoderNamespace = "Mips64" in
+def FCMP_D64 : CEQS_FT<"d", FGR64, IIFcmp, MipsFPCmp>, CEQS_FM<17>,
+               Requires<[IsFP64bit, HasStdEnc]>;
 
 //===----------------------------------------------------------------------===//
 // Floating Point Pseudo-Instructions
diff --git a/lib/Target/Mips/MipsInstrFormats.td b/lib/Target/Mips/MipsInstrFormats.td
index 6c7e3c5252d..97fdab9e184 100644
--- a/lib/Target/Mips/MipsInstrFormats.td
+++ b/lib/Target/Mips/MipsInstrFormats.td
@@ -466,3 +466,19 @@ class BC1F_FM<bit nd, bit tf> {
   let Inst{16} = tf;
   let Inst{15-0} = offset;
 }
+
+class CEQS_FM<bits<5> fmt> {
+  bits<5> fs;
+  bits<5> ft;
+  bits<4> cond;
+
+  bits<32> Inst;
+
+  let Inst{31-26} = 0x11;
+  let Inst{25-21} = fmt;
+  let Inst{20-16} = ft;
+  let Inst{15-11} = fs;
+  let Inst{10-8} = 0; // cc
+  let Inst{7-4} = 0x3;
+  let Inst{3-0} = cond;
+}