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8965584ae3
Move current level 2 compression to be level 3 and create a level 2 compression which is the same algorithm as level 1 but with a larger hashtable. Change-Id: I398a6017c2ff218dded24e229fb51c23ea69f314 Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>
66 lines
2.9 KiB
NASM
66 lines
2.9 KiB
NASM
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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; Copyright(c) 2011-2016 Intel Corporation All rights reserved.
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;
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; Redistribution and use in source and binary forms, with or without
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; modification, are permitted provided that the following conditions
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; are met:
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; * Redistributions of source code must retain the above copyright
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; notice, this list of conditions and the following disclaimer.
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; * Redistributions in binary form must reproduce the above copyright
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; notice, this list of conditions and the following disclaimer in
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; the documentation and/or other materials provided with the
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; distribution.
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; * Neither the name of Intel Corporation nor the names of its
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; contributors may be used to endorse or promote products derived
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; from this software without specific prior written permission.
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;
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; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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; "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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; LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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; A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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; OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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; LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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%include "options.asm"
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%assign K 1024
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%assign D IGZIP_HIST_SIZE ;; Amount of history
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%assign LA 18 * 16 ;; Max look-ahead, rounded up to 32 byte boundary
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%assign BSIZE 2*IGZIP_HIST_SIZE + LA ;; Nominal buffer size
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;; Constants for stateless compression
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%define LAST_BYTES_COUNT 3 ;; Bytes to prevent reading out of array bounds
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%define LA_STATELESS 258 ;; No round up since no data is copied to a buffer
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%assign IGZIP_LVL0_HASH_SIZE (8 * K)
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%assign IGZIP_HASH8K_HASH_SIZE (8 * K)
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%assign IGZIP_HASH_HIST_HASH_SIZE IGZIP_HIST_SIZE
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%assign IGZIP_HASH_MAP_HASH_SIZE IGZIP_HIST_SIZE
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%xdefine LVL0_HASH_MASK (IGZIP_LVL0_HASH_SIZE - 1)
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%xdefine HASH8K_HASH_MASK (IGZIP_HASH8K_HASH_SIZE - 1)
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%xdefine HASH_HIST_HASH_MASK (IGZIP_HASH_HIST_HASH_SIZE - 1)
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%xdefine HASH_MAP_HASH_MASK (IGZIP_HASH_MAP_HASH_SIZE - 1)
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%assign MIN_DEF_MATCH 3 ; Minimum length of a match in deflate
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%assign SHORTEST_MATCH 4
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%assign SLOP 8
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%define ICF_CODE_BYTES 4
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%define LIT_LEN_BIT_COUNT 10
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%define DIST_LIT_BIT_COUNT 9
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%define LIT_LEN_MASK ((1 << LIT_LEN_BIT_COUNT) - 1)
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%define LIT_DIST_MASK ((1 << DIST_LIT_BIT_COUNT) - 1)
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%define DIST_OFFSET LIT_LEN_BIT_COUNT
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%define EXTRA_BITS_OFFSET (DIST_OFFSET + DIST_LIT_BIT_COUNT)
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%define LIT (0x1E << DIST_OFFSET)
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