MIPS: Inlining Math.min and Math.max in crankshaft.

src/mips/lithium-codegen-mips.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 3798 matching lines @@
     DeoptimizeIf(ne, instr->environment(), scratch, Operand(zero_reg));
   } else {
     __ SmiUntag(ToRegister(input));
   }
 }
 
 
 void LCodeGen::EmitNumberUntagD(Register input_reg,
                                 DoubleRegister result_reg,
                                 bool deoptimize_on_undefined,
+                                bool deoptimize_on_minus_zero,
                                 LEnvironment* env) {
   Register scratch = scratch0();
 
   Label load_smi, heap_number, done;
 
   // Smi check.
   __ JumpIfSmi(input_reg, &load_smi);
 
   // Heap number map check.
   __ lw(scratch, FieldMemOperand(input_reg, HeapObject::kMapOffset));
   __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
   if (deoptimize_on_undefined) {
     DeoptimizeIf(ne, env, scratch, Operand(at));
   } else {
     Label heap_number;
     __ Branch(&heap_number, eq, scratch, Operand(at));
 
     __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
     DeoptimizeIf(ne, env, input_reg, Operand(at));
 
     // Convert undefined to NaN.
     __ LoadRoot(at, Heap::kNanValueRootIndex);
     __ ldc1(result_reg, FieldMemOperand(at, HeapNumber::kValueOffset));
     __ Branch(&done);
 
     __ bind(&heap_number);
   }
   // Heap number to double register conversion.
   __ ldc1(result_reg, FieldMemOperand(input_reg, HeapNumber::kValueOffset));
+  if (deoptimize_on_minus_zero) {
+    __ mfc1(at, result_reg.low());
+    __ Branch(&done, ne, at, Operand(zero_reg));
+    __ mfc1(scratch, result_reg.high());
+    DeoptimizeIf(eq, env, scratch, Operand(HeapNumber::kSignMask));
+  }
   __ Branch(&done);
 
   // Smi to double register conversion
   __ bind(&load_smi);
   __ SmiUntag(input_reg);  // Untag smi before converting to float.
   __ mtc1(input_reg, result_reg);
   __ cvt_d_w(result_reg, result_reg);
   __ SmiTag(input_reg);  // Retag smi.
   __ bind(&done);
 }
@@ skipping 111 matching lines @@
   LOperand* input = instr->InputAt(0);
   ASSERT(input->IsRegister());
   LOperand* result = instr->result();
   ASSERT(result->IsDoubleRegister());
 
   Register input_reg = ToRegister(input);
   DoubleRegister result_reg = ToDoubleRegister(result);
 
   EmitNumberUntagD(input_reg, result_reg,
                    instr->hydrogen()->deoptimize_on_undefined(),
+                   instr->hydrogen()->deoptimize_on_minus_zero(),
                    instr->environment());
 }
 
 
 void LCodeGen::DoDoubleToI(LDoubleToI* instr) {
   Register result_reg = ToRegister(instr->result());
   Register scratch1 = scratch0();
   Register scratch2 = ToRegister(instr->TempAt(0));
   DoubleRegister double_input = ToDoubleRegister(instr->InputAt(0));
   DoubleRegister double_scratch = double_scratch0();
@@ skipping 717 matching lines @@
   ASSERT(!environment->HasBeenRegistered());
   RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal