diff options
Diffstat (limited to 'src/isa-l/igzip/lz0a_const.asm')
| -rw-r--r-- | src/isa-l/igzip/lz0a_const.asm | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/isa-l/igzip/lz0a_const.asm b/src/isa-l/igzip/lz0a_const.asm new file mode 100644 index 000000000..deb6d232e --- /dev/null +++ b/src/isa-l/igzip/lz0a_const.asm @@ -0,0 +1,65 @@ +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; +; Copyright(c) 2011-2016 Intel Corporation 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 Intel Corporation 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. +;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; + +%include "options.asm" + +%assign K 1024 +%assign D IGZIP_HIST_SIZE ;; Amount of history +%assign LA 18 * 16 ;; Max look-ahead, rounded up to 32 byte boundary +%assign BSIZE 2*IGZIP_HIST_SIZE + LA ;; Nominal buffer size + +;; Constants for stateless compression +%define LAST_BYTES_COUNT 3 ;; Bytes to prevent reading out of array bounds +%define LA_STATELESS 258 ;; No round up since no data is copied to a buffer + +%assign IGZIP_LVL0_HASH_SIZE (8 * K) +%assign IGZIP_HASH8K_HASH_SIZE (8 * K) +%assign IGZIP_HASH_HIST_HASH_SIZE IGZIP_HIST_SIZE +%assign IGZIP_HASH_MAP_HASH_SIZE IGZIP_HIST_SIZE + +%xdefine LVL0_HASH_MASK (IGZIP_LVL0_HASH_SIZE - 1) +%xdefine HASH8K_HASH_MASK (IGZIP_HASH8K_HASH_SIZE - 1) +%xdefine HASH_HIST_HASH_MASK (IGZIP_HASH_HIST_HASH_SIZE - 1) +%xdefine HASH_MAP_HASH_MASK (IGZIP_HASH_MAP_HASH_SIZE - 1) + +%assign MIN_DEF_MATCH 3 ; Minimum length of a match in deflate +%assign SHORTEST_MATCH 4 + +%assign SLOP 8 + +%define ICF_CODE_BYTES 4 +%define LIT_LEN_BIT_COUNT 10 +%define DIST_LIT_BIT_COUNT 9 + +%define LIT_LEN_MASK ((1 << LIT_LEN_BIT_COUNT) - 1) +%define LIT_DIST_MASK ((1 << DIST_LIT_BIT_COUNT) - 1) + +%define DIST_OFFSET LIT_LEN_BIT_COUNT +%define EXTRA_BITS_OFFSET (DIST_OFFSET + DIST_LIT_BIT_COUNT) +%define LIT (0x1E << DIST_OFFSET) |