File moves for the reorg. Tree is in broken state until I commit the makefile and

#include changes.

--HG--
rename : sim/cache/lzss_compression.cc => base/compression/lzss_compression.cc
rename : sim/cache/lzss_compression.hh => base/compression/lzss_compression.hh
rename : sim/cache/null_compression.hh => base/compression/null_compression.hh
rename : sim/hybrid_pred.cc => base/hybrid_pred.cc
rename : sim/hybrid_pred.hh => base/hybrid_pred.hh
rename : base/aout_object.cc => base/loader/aout_object.cc
rename : base/aout_object.hh => base/loader/aout_object.hh
rename : base/coff_sym.h => base/loader/coff_sym.h
rename : base/coff_symconst.h => base/loader/coff_symconst.h
rename : base/ecoff_object.cc => base/loader/ecoff_object.cc
rename : base/ecoff_object.hh => base/loader/ecoff_object.hh
rename : base/elf_object.cc => base/loader/elf_object.cc
rename : base/elf_object.hh => base/loader/elf_object.hh
rename : base/exec_aout.h => base/loader/exec_aout.h
rename : base/exec_ecoff.h => base/loader/exec_ecoff.h
rename : base/object_file.cc => base/loader/object_file.cc
rename : base/object_file.hh => base/loader/object_file.hh
rename : base/symtab.cc => base/loader/symtab.cc
rename : base/symtab.hh => base/loader/symtab.hh
rename : sim/predictor.hh => base/predictor.hh
rename : sim/sat_counter.cc => base/sat_counter.cc
rename : sim/sat_counter.hh => base/sat_counter.hh
rename : sim/base_cpu.cc => cpu/base_cpu.cc
rename : sim/base_cpu.hh => cpu/base_cpu.hh
rename : sim/exec_context.cc => cpu/exec_context.cc
rename : sim/exec_context.hh => cpu/exec_context.hh
rename : sim/exetrace.cc => cpu/exetrace.cc
rename : sim/exetrace.hh => cpu/exetrace.hh
rename : sim/op_class.hh => cpu/full_cpu/op_class.hh
rename : sim/smt.hh => cpu/full_cpu/smt.hh
rename : sim/inst_seq.hh => cpu/inst_seq.hh
rename : sim/intr_control.cc => cpu/intr_control.cc
rename : sim/intr_control.hh => cpu/intr_control.hh
rename : sim/memtest.cc => cpu/memtest/memtest.cc
rename : sim/memtest.hh => cpu/memtest/memtest.hh
rename : sim/pc_event.cc => cpu/pc_event.cc
rename : sim/pc_event.hh => cpu/pc_event.hh
rename : sim/simple_cpu.cc => cpu/simple_cpu/simple_cpu.cc
rename : sim/simple_cpu.hh => cpu/simple_cpu/simple_cpu.hh
rename : sim/static_inst.cc => cpu/static_inst.cc
rename : sim/static_inst.hh => cpu/static_inst.hh
extra : convert_revision : 05bd41acb2a424f1a38609fd4ac6df681bb479d6

1 files changed, 100 insertions, 0 deletions

diff --git a/base/compression/lzss_compression.hh b/base/compression/lzss_compression.hh
new file mode 100644
index 000000000..5fb47d3f1
--- /dev/null
+++ b/base/compression/lzss_compression.hh
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2003 The Regents of The University of Michigan
+ * 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 with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __LZSS_COMPRESSION_HH__
+#define __LZSS_COMPRESSION_HH__
+
+/** @file
+ * LZSSCompression declarations.
+ */
+
+#include "host.hh" // for uint8_t
+
+/**
+ * Simple LZSS compression scheme.
+ */
+class LZSSCompression
+{
+    /**
+     * Finds the longest substrings that start at the given offsets.
+     * @param src The source block that we search for substrings.
+     * @param front The smaller offset.
+     * @param back The larger offset.
+     * @param size The size of the source block.
+     * @return The size of the longest substring.
+     */
+    int findSubString(uint8_t *src, int front, int back, int size);
+
+    /**
+     * Emit an encoded byte to the compressed data array. If the 2 high
+     * order bits can be signed extended, use 1 byte encoding, if not use 2
+     * bytes.
+     * @param dest The compressed data.
+     * @param byte The byte to emit.
+     * @return The number of bytes used to encode.
+     */
+    int emitByte(uint8_t *dest, uint8_t byte);
+
+    /**
+     * Emit a string reference to the compressed data array. A string reference
+     * always uses 3 bytes. 1 flag bit, 12 bits for the starting position, and
+     * 11 bits for the length of the string. This allows compression of 4096
+     * byte blocks with string lengths of up to 2048 bytes.
+     * @param dest The compressed data.
+     * @param P The starting position in the uncompressed data.
+     * @param L The length in bytes of the string.
+     */
+    void emitString(uint8_t *dest, uint16_t P, uint16_t L);
+
+  public:
+    /**
+     * Compresses the source block and stores it in the destination block. If
+     * the compressed block grows to larger than the source block, it aborts
+     * and just performs a copy.
+     * @param dest The destination block.
+     * @param src The block to be compressed.
+     * @param size The size of the source block.
+     * @return The size of the compressed block.
+     *
+     * @pre Destination has enough storage to hold the compressed block.
+     */
+    int compress(uint8_t *dest, uint8_t *src, int size);
+
+    /**
+     * Unompresses the source block and stores it in the destination block.
+     * @param dest The destination block.
+     * @param src The block to be uncompressed.
+     * @param size The size of the source block.
+     * @return The size of the uncompressed block.
+     *
+     * @pre Destination has enough storage to hold the uncompressed block.
+     */
+    int uncompress(uint8_t *dest, uint8_t *src, int size);
+};
+
+#endif //__LZSS_COMPRESSION_HH__