From 9a05b98ef9ec58c52f35ce04677f24ef62a79701 Mon Sep 17 00:00:00 2001
From: Akira Hatanaka <ahatanaka@mips.com>
Date: Mon, 22 Jul 2013 19:30:38 +0000
Subject: [PATCH] [mips] Fix MipsAsmParser::parseCCRRegs.

Enable parsing all 32 floating point control registers $0-31 and stop trying to
parse floating point condition code register $fcc0. Also, return ParseFail if
the operand being parsed is not in the expected format.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186861 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/Mips/AsmParser/MipsAsmParser.cpp | 27 ++++++++-------------
 test/MC/Mips/mips-fpu-instructions.s        |  4 ++-
 2 files changed, 13 insertions(+), 18 deletions(-)

diff --git a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 56a5dfdafbd..3e9b950494c 100644
--- a/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -1449,30 +1449,23 @@ MipsAsmParser::parseHW64Regs(
 
 MipsAsmParser::OperandMatchResultTy
 MipsAsmParser::parseCCRRegs(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
-  unsigned RegNum;
   // If the first token is not '$' we have an error.
   if (Parser.getTok().isNot(AsmToken::Dollar))
-    return MatchOperand_NoMatch;
+    return MatchOperand_ParseFail;
+
   SMLoc S = Parser.getTok().getLoc();
   Parser.Lex(); // Eat the '$'
 
   const AsmToken &Tok = Parser.getTok(); // Get next token.
-  if (Tok.is(AsmToken::Integer)) {
-    RegNum = Tok.getIntVal();
-    // At the moment only fcc0 is supported.
-    if (RegNum != 0)
-      return MatchOperand_ParseFail;
-  } else if (Tok.is(AsmToken::Identifier)) {
-    // At the moment only fcc0 is supported.
-    if (Tok.getIdentifier() != "fcc0")
-      return MatchOperand_ParseFail;
-  } else
-    return MatchOperand_NoMatch;
 
-  MipsOperand *op = MipsOperand::CreateReg(Mips::FCC0, S,
-                                           Parser.getTok().getLoc());
-  op->setRegKind(MipsOperand::Kind_CCRRegs);
-  Operands.push_back(op);
+  if (Tok.isNot(AsmToken::Integer))
+    return MatchOperand_ParseFail;
+
+  unsigned Reg = matchRegisterByNumber(Tok.getIntVal(), Mips::CCRRegClassID);
+
+  MipsOperand *Op = MipsOperand::CreateReg(Reg, S, Parser.getTok().getLoc());
+  Op->setRegKind(MipsOperand::Kind_CCRRegs);
+  Operands.push_back(Op);
 
   Parser.Lex(); // Eat the register number.
   return MatchOperand_Success;
diff --git a/test/MC/Mips/mips-fpu-instructions.s b/test/MC/Mips/mips-fpu-instructions.s
index 5ff31f3e493..256ce4513b7 100644
--- a/test/MC/Mips/mips-fpu-instructions.s
+++ b/test/MC/Mips/mips-fpu-instructions.s
@@ -138,7 +138,8 @@
 # FP move instructions
 #------------------------------------------------------------------------------
 
-# CHECK:  cfc1    $6, $fcc0            # encoding: [0x00,0x00,0x46,0x44]
+# CHECK:  cfc1    $6, $0               # encoding: [0x00,0x00,0x46,0x44]
+# CHECK:  ctc1    $10, $31             # encoding: [0x00,0xf8,0xca,0x44]
 # CHECK:  mfc1    $6, $f7              # encoding: [0x00,0x38,0x06,0x44]
 # CHECK:  mfhi    $5                   # encoding: [0x10,0x28,0x00,0x00]
 # CHECK:  mflo    $5                   # encoding: [0x12,0x28,0x00,0x00]
@@ -162,6 +163,7 @@
 # CHECK:  suxc1   $f4, $24($5)            # encoding: [0x0d,0x20,0xb8,0x4c]
 
    cfc1    $a2,$0
+   ctc1    $10,$31
    mfc1    $a2,$f7
    mfhi    $a1
    mflo    $a1