Use GPRs for mints

runtime/vm/assembler_arm.h

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_ASSEMBLER_ARM_H_
 #define VM_ASSEMBLER_ARM_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm.h directly; use assembler.h instead.
 #endif
@@ skipping 333 matching lines @@
 
   void rsb(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
   void rsbs(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
 
   void add(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
 
   void adds(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
 
   void adc(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
 
+  void adcs(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
+
   void sbc(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
 
+  void sbcs(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
+
   void rsc(Register rd, Register rn, ShifterOperand so, Condition cond = AL);
 
   void tst(Register rn, ShifterOperand so, Condition cond = AL);
 
   void teq(Register rn, ShifterOperand so, Condition cond = AL);
 
   void cmp(Register rn, ShifterOperand so, Condition cond = AL);
 
   void cmn(Register rn, ShifterOperand so, Condition cond = AL);
 
@@ skipping 321 matching lines @@
   void Lsl(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Lsl(Register rd, Register rm, Register rs, Condition cond = AL);
   void Lsr(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Lsr(Register rd, Register rm, Register rs, Condition cond = AL);
   void Asr(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Asr(Register rd, Register rm, Register rs, Condition cond = AL);
   void Ror(Register rd, Register rm, uint32_t shift_imm, Condition cond = AL);
   void Ror(Register rd, Register rm, Register rs, Condition cond = AL);
   void Rrx(Register rd, Register rm, Condition cond = AL);
 
+  // Fill rd with the sign of rm.
+  void SignFill(Register rd, Register rm);

[regis, 2014/05/22 17:09:40]

For regularity, you could make this conditional.

+
   void Vreciprocalqs(QRegister qd, QRegister qm);
   void VreciprocalSqrtqs(QRegister qd, QRegister qm);
   // If qm must be preserved, then provide a (non-QTMP) temporary.
   void Vsqrtqs(QRegister qd, QRegister qm, QRegister temp);
   void Vdivqs(QRegister qd, QRegister qn, QRegister qm);
 
   void SmiTag(Register reg, Condition cond = AL) {
     Lsl(reg, reg, kSmiTagSize, cond);
   }
 
@@ skipping 200 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM_H_