Fuse long and FP compare & condition on ARM in Optimizing.

Also:
- Stylistic changes in corresponding parts on the x86 and
  x86-64 code generators.
- Update and improve the documentation of
  art::arm::Condition.

Bug: 21120453
Change-Id: If144772046e7d21362c3c2086246cb7d011d49ce
diff --git a/compiler/optimizing/code_generator_arm.h b/compiler/optimizing/code_generator_arm.h
index 1d10293..53bd766 100644
--- a/compiler/optimizing/code_generator_arm.h
+++ b/compiler/optimizing/code_generator_arm.h
@@ -207,6 +207,14 @@
                              Label* true_target,
                              Label* false_target,
                              Label* always_true_target);
+  void GenerateCompareWithImmediate(Register left, int32_t right);
+  void GenerateCompareTestAndBranch(HIf* if_instr,
+                                    HCondition* condition,
+                                    Label* true_target,
+                                    Label* false_target,
+                                    Label* always_true_target);
+  void GenerateFPJumps(HCondition* cond, Label* true_label, Label* false_label);
+  void GenerateLongComparesAndJumps(HCondition* cond, Label* true_label, Label* false_label);
   void DivRemOneOrMinusOne(HBinaryOperation* instruction);
   void DivRemByPowerOfTwo(HBinaryOperation* instruction);
   void GenerateDivRemWithAnyConstant(HBinaryOperation* instruction);