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igzip: Create flag signifying existence of buffer history

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Create a flag signifying the existence of buffer history so a literal does not
have to be encoded on every call of isal_deflate_body and isal_deflate_finish.

Change-Id: I3750cac7e5f19fbaa190e19fb929172c16289723
Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>
This commit is contained in:
Roy Oursler
2016-10-11 10:30:54 -07:00
committed by Greg Tucker
parent e4c2106049
commit 4809b9ba83
5 changed files with 39 additions and 23 deletions
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include/igzip_lib.h
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@@ -240,7 +240,7 @@ struct isal_zstate {
uint32_t tmp_out_end; //!< temporary variable
uint32_t has_eob; //!< keeps track of eob on the last deflate block
uint32_t has_eob_hdr; //!< keeps track of eob hdr (with BFINAL set)
uint32_t left_over; //!< keeps track of overflow bytes
uint32_t has_hist; //!< flag to track if there is match history
DECLARE_ALIGNED(uint8_t buffer[2 * IGZIP_HIST_SIZE + ISAL_LOOK_AHEAD], 32); //!< Internal buffer
DECLARE_ALIGNED(uint16_t head[IGZIP_HASH_SIZE], 16); //!< Hash array