From 89828a6a563426edda0e30384997b2b24be6bb12 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Thu, 13 Dec 2012 01:32:36 +0000
Subject: [mips] Modify definitions of floating point branch instructions.

No functionality change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170076 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/MipsInstrFPU.td     | 15 +++++++++++++--
 lib/Target/Mips/MipsInstrFormats.td | 13 +++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/lib/Target/Mips/MipsInstrFPU.td b/lib/Target/Mips/MipsInstrFPU.td
index 182f2e9150..878e6b2d1f 100644
--- a/lib/Target/Mips/MipsInstrFPU.td
+++ b/lib/Target/Mips/MipsInstrFPU.td
@@ -273,6 +273,17 @@ class SWXC1_FT<string opstr, RegisterClass DRC, RegisterClass PRC,
          !strconcat(opstr, "\t$fs, ${index}(${base})"),
          [(OpNode DRC:$fs, (add PRC:$base, PRC:$index))], Itin, FrmFI>;
 
+class BC1F_FT<string opstr, InstrItinClass Itin,
+              SDPatternOperator Op = null_frag>  :
+  InstSE<(outs), (ins brtarget:$offset), !strconcat(opstr, "\t$offset"),
+         [(MipsFPBrcond Op, bb:$offset)], Itin, FrmFI> {
+  let isBranch = 1;
+  let isTerminator = 1;
+  let hasDelaySlot = 1;
+  let Defs = [AT];
+  let Uses = [FCR31];
+}
+
 //===----------------------------------------------------------------------===//
 // Floating Point Instructions
 //===----------------------------------------------------------------------===//
@@ -495,8 +506,8 @@ let isBranch=1, isTerminator=1, hasDelaySlot=1, base=0x8, Uses=[FCR31] in
 }
 
 let DecoderMethod = "DecodeBC1" in {
-def BC1F  : FBRANCH<0, 0, MIPS_BRANCH_F,  "bc1f">;
-def BC1T  : FBRANCH<0, 1, MIPS_BRANCH_T,  "bc1t">;
+def BC1F : BC1F_FT<"bc1f", IIBranch, MIPS_BRANCH_F>, BC1F_FM<0, 0>;
+def BC1T : BC1F_FT<"bc1t", IIBranch, MIPS_BRANCH_T>, BC1F_FM<0, 1>;
 }
 //===----------------------------------------------------------------------===//
 // Floating Point Flag Conditions
diff --git a/lib/Target/Mips/MipsInstrFormats.td b/lib/Target/Mips/MipsInstrFormats.td
index 210a1cb85b..6c7e3c5252 100644
--- a/lib/Target/Mips/MipsInstrFormats.td
+++ b/lib/Target/Mips/MipsInstrFormats.td
@@ -453,3 +453,16 @@ class SWXC1_FM<bits<6> funct> {
   let Inst{10-6}  = 0;
   let Inst{5-0}   = funct;
 }
+
+class BC1F_FM<bit nd, bit tf> {
+  bits<16> offset;
+
+  bits<32> Inst;
+
+  let Inst{31-26} = 0x11;
+  let Inst{25-21} = 0x8;
+  let Inst{20-18} = 0; // cc
+  let Inst{17} = nd;
+  let Inst{16} = tf;
+  let Inst{15-0} = offset;
+}
-- 
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