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

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 0eaf4dc9b10fcb5e7d4c8272b375a6585cb83f66..f98f14105f29be9ab1d37bc621c3eb816c29a0db 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -1155,6 +1155,10 @@ class MacroAssembler: public Assembler {
   }
 
 
+  // Emit code for a flooring division by a constant. The dividend register is
+  // unchanged and ip gets clobbered. Dividend and result must be different.
+  void FlooringDiv(Register result, Register dividend, int32_t divisor);
+
   // ---------------------------------------------------------------------------
   // StatsCounter support