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igzip: Implement xmm loads to preload data in update_histogram

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Signed-off-by: Roy Oursler <roy.j.oursler@intel.com>
Reviewed-by: Greg Tucker <greg.b.tucker@intel.com>
This commit is contained in:
Roy Oursler 2016-06-24 14:22:10 -04:00 committed by Greg Tucker
parent 4d40cd360d
commit 17dac9f641
1 changed files with 16 additions and 8 deletions
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24
igzip/igzip_update_histogram.asm
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@ -66,6 +66,7 @@ global %1
%define xtmp0 xmm0
%define xtmp1 xmm1
%define xdata xmm2
%define ytmp0 ymm0
%define ytmp1 ymm1
@ -194,6 +195,7 @@ init_hash_table:
inc f_i
;; Setup to begin loop 2
MOVDQU xdata, [file_start + f_i]
mov curr_data, [file_start + f_i]
mov curr_data2, curr_data
compute_hash hash, curr_data
@ -209,6 +211,9 @@ loop2:
lea tmp1, [file_start + f_i]
MOVQ curr_data, xdata
PSRLDQ xdata, 1
;; Load possible look back distances and update hash data
mov dist %+ w, f_i %+ w
sub dist %+ w, word [histogram + _hash_offset + 2 * hash]
@ -222,8 +227,9 @@ loop2:
;; Start computing hashes to be used in either the next loop or
;; for updating the hash if a match is found
mov curr_data2, [file_start + f_i + 1]
mov tmp2, curr_data2
MOVQ curr_data2, xdata
MOVQ tmp2, xdata
shr curr_data2, 8
compute_hash hash, curr_data2
;; Check if look back distances are valid. Load a junk distance of 1
@ -238,18 +244,18 @@ loop2:
cmovae dist2, tmp3
neg dist2
shr tmp2, 8
shr tmp2, 16
compute_hash hash2, tmp2
;; Check for long len/dist matches (>7)
mov len, [tmp1]
mov len, curr_data
xor len, [tmp1 + dist - 1]
jz compare_loop
and hash %+ d, HASH_MASK
and hash2 %+ d, HASH_MASK
mov len2, [tmp1 + 1]
MOVQ len2, xdata
xor len2, [tmp1 + dist2]
jz compare_loop2
@ -275,7 +281,8 @@ len_dist_lit_huffman_pre:
shr len2, 3
len_dist_lit_huffman:
mov curr_data, [file_start + f_i + 3]
MOVQ curr_data, xdata
shr curr_data, 24
compute_hash hash3, curr_data
;; Store updated hashes
@ -286,6 +293,7 @@ len_dist_lit_huffman:
add f_i, len2
MOVDQU xdata, [file_start + f_i]
mov curr_data, [file_start + f_i]
mov tmp1, curr_data
compute_hash hash, curr_data
@ -323,6 +331,7 @@ len_dist_huffman:
dec f_i
add f_i, len
MOVDQU xdata, [file_start + f_i]
mov curr_data, [file_start + f_i]
mov tmp1, curr_data
compute_hash hash, curr_data
@ -345,12 +354,11 @@ len_dist_huffman:
jmp end_loop_2
lit_lit_huffman:
MOVDQU xdata, [file_start + f_i + 1]
and curr_data, 0xff
add f_i, 1
inc qword [histogram + _lit_len_offset + HIST_ELEM_SIZE * curr_data]
mov curr_data %+ d, [file_start + f_i]
cmp f_i, file_length
jl loop2