MIPS: Optimise Math.floor(x/y) to use integer division for MIPS.

src/mips/lithium-codegen-mips.h

Index: src/mips/lithium-codegen-mips.h
diff --git a/src/mips/lithium-codegen-mips.h b/src/mips/lithium-codegen-mips.h
index 443a20aa231459e6e584f7a8ea07fcd64b3d7f21..d6134c47c46e9d36f1293183b93facf60bacc31b 100644
--- a/src/mips/lithium-codegen-mips.h
+++ b/src/mips/lithium-codegen-mips.h
@@ -377,6 +377,17 @@ class LCodeGen BASE_EMBEDDED {
                     Register source,
                     int* offset);
 
+  // Emit optimized code for integer division.
+  // Inputs are signed.
+  // All registers are clobbered.
+  // If 'remainder' is no_reg, it is not computed.
+  void EmitSignedIntegerDivisionByConstant(Register result,
+                                           Register dividend,
+                                           int32_t divisor,
+                                           Register remainder,
+                                           Register scratch,
+                                           LEnvironment* environment);
+
   struct JumpTableEntry {
     inline JumpTableEntry(Address entry, bool frame, bool is_lazy)
         : label(),