ceph/src/isa-l/igzip/lz0a_const.asm

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  29
  30 %include "options.asm"
  31
  32 %assign K      1024
  33 %assign D      IGZIP_HIST_SIZE        ;; Amount of history
  34 %assign LA     18 * 16      ;; Max look-ahead, rounded up to 32 byte boundary
  35 %assign BSIZE  2*IGZIP_HIST_SIZE + LA     ;; Nominal buffer size
  36
  37 ;; Constants for stateless compression
  38 %define LAST_BYTES_COUNT        3 ;; Bytes to prevent reading out of array bounds
  39 %define LA_STATELESS    258     ;; No round up since no data is copied to a buffer
  40
  41 %ifndef IGZIP_HASH_SIZE
  42 %assign IGZIP_HASH_SIZE  (8 * K)
  43 %endif
  44
  45 %assign HASH_MASK  (IGZIP_HASH_SIZE - 1)
  46
  47 %assign SHORTEST_MATCH  4
  48
  49 %assign SLOP 8
  50
  51 %define LIT_LEN_BIT_COUNT 10
  52 %define DIST_LIT_BIT_COUNT 9
  53
  54 %define DIST_OFFSET     LIT_LEN_BIT_COUNT
  55 %define EXTRA_BITS_OFFSET       (DIST_OFFSET + DIST_LIT_BIT_COUNT)
  56 %define LIT (0x1E << DIST_OFFSET)