MIPS: Some assembler-level optimizations on ARM.

src/mips/macro-assembler-mips.h

 // 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 1224 matching lines @@
   }
 
   void SmiUntag(Register reg) {
     sra(reg, reg, kSmiTagSize);
   }
 
   void SmiUntag(Register dst, Register src) {
     sra(dst, src, kSmiTagSize);
   }
 
+  // Untag the source value into destination and jump if source is a smi.
+  // Souce and destination can be the same register.
+  void UntagAndJumpIfSmi(Register dst, Register src, Label* smi_case);
+
+  // Untag the source value into destination and jump if source is not a smi.
+  // Souce and destination can be the same register.
+  void UntagAndJumpIfNotSmi(Register dst, Register src, Label* non_smi_case);
+
   // Jump the register contains a smi.
-  inline void JumpIfSmi(Register value, Label* smi_label,
-                        Register scratch = at,
-                        BranchDelaySlot bd = PROTECT) {
-    ASSERT_EQ(0, kSmiTag);
-    andi(scratch, value, kSmiTagMask);
-    Branch(bd, smi_label, eq, scratch, Operand(zero_reg));
-  }
+  void JumpIfSmi(Register value,
+                 Label* smi_label,
+                 Register scratch = at,
+                 BranchDelaySlot bd = PROTECT);
 
   // Jump if the register contains a non-smi.
-  inline void JumpIfNotSmi(Register value, Label* not_smi_label,
-                           Register scratch = at) {
-    ASSERT_EQ(0, kSmiTag);
-    andi(scratch, value, kSmiTagMask);
-    Branch(not_smi_label, ne, scratch, Operand(zero_reg));
-  }
+  void JumpIfNotSmi(Register value,
+                    Label* not_smi_label,
+                    Register scratch = at,
+                    BranchDelaySlot bd = PROTECT);
 
   // Jump if either of the registers contain a non-smi.
   void JumpIfNotBothSmi(Register reg1, Register reg2, Label* on_not_both_smi);
   // Jump if either of the registers contain a smi.
   void JumpIfEitherSmi(Register reg1, Register reg2, Label* on_either_smi);
 
   // Abort execution if argument is a smi. Used in debug code.
   void AbortIfSmi(Register object);
   void AbortIfNotSmi(Register object);
 
@@ skipping 187 matching lines @@
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_MIPS_MACRO_ASSEMBLER_MIPS_H_