MIPS: Faster memcpy.

src/mips/macro-assembler-mips.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 771 matching lines @@
       } else {
         srl(at, rs, rt.imm32_);
         sll(rd, rs, (0x20 - rt.imm32_) & 0x1f);
         or_(rd, rd, at);
       }
     }
   }
 }
 
 
+void MacroAssembler::Pref(int32_t hint, const MemOperand& rs) {
+  if (kArchVariant == kLoongson) {
+    lw(zero_reg, rs);
+  } else {
+    pref(hint, rs);
+  }
+}
+
+
 //------------Pseudo-instructions-------------
 
+void MacroAssembler::Ulw(Register rd, const MemOperand& rs) {
+  lwr(rd, rs);
+  lwl(rd, MemOperand(rs.rm(), rs.offset() + 3));
+}
+
+
+void MacroAssembler::Usw(Register rd, const MemOperand& rs) {
+  swr(rd, rs);
+  swl(rd, MemOperand(rs.rm(), rs.offset() + 3));
+}
+
+
 void MacroAssembler::li(Register dst, Handle<Object> value, LiFlags mode) {
   AllowDeferredHandleDereference smi_check;
   if (value->IsSmi()) {
     li(dst, Operand(value), mode);
   } else {
     ASSERT(value->IsHeapObject());
     if (isolate()->heap()->InNewSpace(*value)) {
       Handle<Cell> cell = isolate()->factory()->NewCell(value);
       li(dst, Operand(cell));
       lw(dst, FieldMemOperand(dst, Cell::kValueOffset));
@@ skipping 4960 matching lines @@
        opcode == BGTZL);
   opcode = (cond == eq) ? BEQ : BNE;
   instr = (instr & ~kOpcodeMask) | opcode;
   masm_.emit(instr);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS