MIPS: Faster memcpy.

src/mips/assembler-mips.cc

Index: src/mips/assembler-mips.cc
diff --git a/src/mips/assembler-mips.cc b/src/mips/assembler-mips.cc
index 9aed3bd4aaa8d891f4be68acbad698a287d49c1c..f551dd5e104129e910996606ce45cc0c47573146 100644
--- a/src/mips/assembler-mips.cc
+++ b/src/mips/assembler-mips.cc
@@ -260,6 +260,12 @@ MemOperand::MemOperand(Register rm, int32_t offset) : Operand(rm) {
 }
 
 
+MemOperand::MemOperand(Register rm, int32_t unit, int32_t multiplier,
+                       OffsetAddend offset_addend) : Operand(rm) {
+  offset_ = unit * multiplier + offset_addend;
+}
+
+
 // -----------------------------------------------------------------------------
 // Specific instructions, constants, and masks.
 
@@ -1623,6 +1629,15 @@ void Assembler::ext_(Register rt, Register rs, uint16_t pos, uint16_t size) {
 }
 
 
+void Assembler::pref(int32_t hint, const MemOperand& rs) {
+  ASSERT(kArchVariant != kLoongson);
+  ASSERT(is_uint5(hint) && is_uint16(rs.offset_));
+  Instr instr = PREF | (rs.rm().code() << kRsShift) | (hint << kRtShift)
+      | (rs.offset_);
+  emit(instr);
+}
+
+
 //--------Coprocessor-instructions----------------
 
 // Load, store, move.