Calling convention for MIPS32

src/IceRegistersMIPS32.h

 //===- subzero/src/IceRegistersMIPS32.h - Register information --*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 71 matching lines @@
   return FPRRegister(RegNum - Reg_FPR_First);
 }
 
 static inline bool isFPRReg(RegNumT RegNum) {
   return (int(Reg_FPR_First) <= int(RegNum)) &&
          (unsigned(RegNum) <= Reg_FPR_Last);
 }
 
 const char *getRegName(RegNumT RegNum);
 
+static inline RegNumT getI64PairFirstGPRNum(RegNumT RegNum) {
+  // For now it works only for argument register pairs
+  // TODO(mohit.bhakkad): Change this to support all the register pairs once we
+  // have table-driven approach ready
+  assert(RegNum == Reg_A0A1 || RegNum == Reg_A2A3);
+  return (RegNum == RegMIPS32::Reg_A0A1) ? RegMIPS32::Reg_A0
+                                         : RegMIPS32::Reg_A2;
+}
+
+static inline RegNumT getI64PairSecondGPRNum(RegNumT RegNum) {
+  // For now it works only for argument register pairs
+  // TODO(mohit.bhakkad): Change this to support all the register pairs once we
+  // have table-driven approach ready
+  assert(RegNum == Reg_A0A1 || RegNum == Reg_A2A3);
+  return (RegNum == RegMIPS32::Reg_A0A1) ? RegMIPS32::Reg_A1
+                                         : RegMIPS32::Reg_A3;
+}
+
 } // end of namespace RegMIPS32
 
 // Extend enum RegClass with MIPS32-specific register classes (if any).
 enum RegClassMIPS32 : uint8_t { RCMIPS32_NUM = RC_Target };
 
 } // end of namespace MIPS32
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEREGISTERSMIPS32_H