[mips] Increase the number of floating point control registers available to 32.

Create a dedicated register class for floating point condition code registers and
move FCC0 from register class CCR to the new register class.

llvm-svn: 185373

1 files changed, 9 insertions, 4 deletions

diff --git a/llvm/lib/Target/Mips/MipsRegisterInfo.td b/llvm/lib/Target/Mips/MipsRegisterInfo.td
index 36870842e6b..a5320bbff47 100644
--- a/llvm/lib/Target/Mips/MipsRegisterInfo.td
+++ b/llvm/lib/Target/Mips/MipsRegisterInfo.td
@@ -248,8 +248,9 @@ let Namespace = "Mips" in {
   def LO64  : RegisterWithSubRegs<"lo", [LO]>;
   }
 
-  // Status flags register
-  def FCR31 : Register<"31">;
+  // FP control registers.
+  foreach I = 0-31 in
+  def FCR#I : MipsReg<#I, ""#I>;
 
   // fcc0 register
   def FCC0 : MipsReg<0, "fcc0">;
@@ -357,8 +358,12 @@ def AFGR64 : RegisterClass<"Mips", [f64], 64, (add
 
 def FGR64 : RegisterClass<"Mips", [f64], 64, (sequence "D%u_64", 0, 31)>;
 
-// Condition Register for floating point operations
-def CCR  : RegisterClass<"Mips", [i32], 32, (add FCR31,FCC0)>, Unallocatable;
+// FP control registers.
+def CCR : RegisterClass<"Mips", [i32], 32, (sequence "FCR%u", 0, 31)>,
+          Unallocatable;
+
+// FP condition code registers.
+def FCC : RegisterClass<"Mips", [i32], 32, (add FCC0)>, Unallocatable;
 
 // Hi/Lo Registers
 def LORegs : RegisterClass<"Mips", [i32], 32, (add LO)>;