Reland "Handle non-power-of-2 divisors in division-like operations".

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index cc0f392f185212826144898536c1945fef233d7f..2e5b8351c6299f6e1f45b9b4ef3587a8b815c790 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -3603,6 +3603,19 @@ void MacroAssembler::JumpIfDictionaryInPrototypeChain(
   j(not_equal, &loop_again);
 }
 
+
+void MacroAssembler::FlooringDiv(Register dividend, int32_t divisor) {
+  ASSERT(!dividend.is(eax));
+  ASSERT(!dividend.is(edx));
+  MultiplierAndShift ms(divisor);
+  mov(eax, Immediate(ms.multiplier()));
+  imul(dividend);
+  if (divisor > 0 && ms.multiplier() < 0) add(edx, dividend);
+  if (divisor < 0 && ms.multiplier() > 0) sub(edx, dividend);
+  if (ms.shift() > 0) sar(edx, ms.shift());
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32