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      1 // Copyright 2008-2009 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // A light-weight assembler for the Irregexp byte code.
     29 
     30 
     31 #include "v8.h"
     32 #include "ast.h"
     33 #include "bytecodes-irregexp.h"
     34 
     35 #ifndef V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
     36 #define V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
     37 
     38 namespace v8 {
     39 namespace internal {
     40 
     41 #ifdef V8_INTERPRETED_REGEXP
     42 
     43 void RegExpMacroAssemblerIrregexp::Emit(uint32_t byte,
     44                                         uint32_t twenty_four_bits) {
     45   uint32_t word = ((twenty_four_bits << BYTECODE_SHIFT) | byte);
     46   ASSERT(pc_ <= buffer_.length());
     47   if (pc_  + 3 >= buffer_.length()) {
     48     Expand();
     49   }
     50   *reinterpret_cast<uint32_t*>(buffer_.start() + pc_) = word;
     51   pc_ += 4;
     52 }
     53 
     54 
     55 void RegExpMacroAssemblerIrregexp::Emit16(uint32_t word) {
     56   ASSERT(pc_ <= buffer_.length());
     57   if (pc_ + 1 >= buffer_.length()) {
     58     Expand();
     59   }
     60   *reinterpret_cast<uint16_t*>(buffer_.start() + pc_) = word;
     61   pc_ += 2;
     62 }
     63 
     64 
     65 void RegExpMacroAssemblerIrregexp::Emit32(uint32_t word) {
     66   ASSERT(pc_ <= buffer_.length());
     67   if (pc_ + 3 >= buffer_.length()) {
     68     Expand();
     69   }
     70   *reinterpret_cast<uint32_t*>(buffer_.start() + pc_) = word;
     71   pc_ += 4;
     72 }
     73 
     74 #endif  // V8_INTERPRETED_REGEXP
     75 
     76 } }  // namespace v8::internal
     77 
     78 #endif  // V8_REGEXP_MACRO_ASSEMBLER_IRREGEXP_INL_H_
     79