Tweaked FlooringDiv back to TruncatingDiv again.

src/ia32/lithium-codegen-ia32.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 1396 matching lines @@
 void LCodeGen::DoModByConstI(LModByConstI* instr) {
   Register dividend = ToRegister(instr->dividend());
   int32_t divisor = instr->divisor();
   ASSERT(ToRegister(instr->result()).is(eax));
 
   if (divisor == 0) {
     DeoptimizeIf(no_condition, instr->environment());
     return;
   }
 
-  __ FlooringDiv(dividend, Abs(divisor));
-  __ mov(eax, dividend);
-  __ shr(eax, 31);
-  __ add(edx, eax);
+  __ TruncatingDiv(dividend, Abs(divisor));
   __ imul(edx, edx, Abs(divisor));
   __ mov(eax, dividend);
   __ sub(eax, edx);
 
   // Check for negative zero.
   HMod* hmod = instr->hydrogen();
   if (hmod->CheckFlag(HValue::kBailoutOnMinusZero)) {
     Label remainder_not_zero;
     __ j(not_zero, &remainder_not_zero, Label::kNear);
     __ cmp(dividend, Immediate(0));
@@ skipping 106 matching lines @@
     return;
   }
 
   // Check for (0 / -x) that will produce negative zero.
   HDiv* hdiv = instr->hydrogen();
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
     __ test(dividend, dividend);
     DeoptimizeIf(zero, instr->environment());
   }
 
-  __ FlooringDiv(dividend, Abs(divisor));
-  __ mov(eax, dividend);
-  __ shr(eax, 31);
-  __ add(edx, eax);
+  __ TruncatingDiv(dividend, Abs(divisor));
   if (divisor < 0) __ neg(edx);
 
   if (!hdiv->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)) {
     __ mov(eax, edx);
     __ imul(eax, eax, divisor);
     __ sub(eax, dividend);
     DeoptimizeIf(not_equal, instr->environment());
   }
 }
 
@@ skipping 103 matching lines @@
     return;
   }
 
   // Check for (0 / -x) that will produce negative zero.
   HMathFloorOfDiv* hdiv = instr->hydrogen();
   if (hdiv->CheckFlag(HValue::kBailoutOnMinusZero) && divisor < 0) {
     __ test(dividend, dividend);
     DeoptimizeIf(zero, instr->environment());
   }
 
-  __ FlooringDiv(dividend, divisor);
+  // TODO(svenpanne) Add correction terms.
+  __ TruncatingDiv(dividend, divisor);
 }
 
 
 void LCodeGen::DoMulI(LMulI* instr) {
   Register left = ToRegister(instr->left());
   LOperand* right = instr->right();
 
   if (instr->hydrogen()->CheckFlag(HValue::kBailoutOnMinusZero)) {
     __ mov(ToRegister(instr->temp()), left);
   }
@@ skipping 4651 matching lines @@
                               FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32