[v8-dev] ARM: Optimize fixed double arguments

src/arm/macro-assembler-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3466 matching lines @@
 }
 
 
 void MacroAssembler::PrepareCallCFunction(int num_reg_arguments,
                                           Register scratch) {
   PrepareCallCFunction(num_reg_arguments, 0, scratch);
 }
 
 
 void MacroAssembler::SetCallCDoubleArguments(DwVfpRegister dreg) {
-  if (use_eabi_hardfloat()) {
-    Move(d0, dreg);
-  } else {
+  ASSERT(dreg.is(d0));
+  if (!use_eabi_hardfloat()) {
     vmov(r0, r1, dreg);
   }
 }
 
 
 void MacroAssembler::SetCallCDoubleArguments(DwVfpRegister dreg1,
                                              DwVfpRegister dreg2) {
-  if (use_eabi_hardfloat()) {
-    if (dreg2.is(d0)) {
-      ASSERT(!dreg1.is(d1));
-      Move(d1, dreg2);
-      Move(d0, dreg1);
-    } else {
-      Move(d0, dreg1);
-      Move(d1, dreg2);
-    }
-  } else {
+  ASSERT(dreg1.is(d0));
+  ASSERT(dreg2.is(d1));
+  if (!use_eabi_hardfloat()) {
     vmov(r0, r1, dreg1);
     vmov(r2, r3, dreg2);
   }
 }
 
 
 void MacroAssembler::SetCallCDoubleArguments(DwVfpRegister dreg,
                                              Register reg) {
+  ASSERT(dreg.is(d0));
   if (use_eabi_hardfloat()) {
-    Move(d0, dreg);
     Move(r0, reg);
   } else {
     Move(r2, reg);
     vmov(r0, r1, dreg);
   }
 }
 
 
 void MacroAssembler::CallCFunction(ExternalReference function,
                                    int num_reg_arguments,
@@ skipping 551 matching lines @@
 void CodePatcher::EmitCondition(Condition cond) {
   Instr instr = Assembler::instr_at(masm_.pc_);
   instr = (instr & ~kCondMask) | cond;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM