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[libpng16] More efficient absolute value calculation on SSE2 (Matthieu Darbois).

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This commit is contained in:
Glenn Randers-Pehrson 2016-06-20 08:28:34 -05:00
parent 42069e9432
commit 6c7c5a04b8
3 changed files with 6 additions and 4 deletions
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5
ANNOUNCE
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@ -1,4 +1,4 @@
Libpng 1.6.24beta02 - June 19, 2016
Libpng 1.6.24beta02 - June 20, 2016
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@ -29,7 +29,7 @@ Version 1.6.24beta01 [June 11, 2016]
Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro
is not used within libpng, but is used in some of the examples.
Version 1.6.24beta02 [June 19, 2016]
Version 1.6.24beta02 [June 20, 2016]
Correct filter heuristic overflow handling. This was broken when the
write filter code was moved out-of-line; if there is a single filter and
the heuristic sum overflows the calculation of the filtered line is not
@ -45,6 +45,7 @@ Version 1.6.24beta02 [June 19, 2016]
implemented in 1.7), however a simple safe fix here is to chose the lowest
numbered filter in the list from png_set_filter (this only works if the
first problem is also fixed) (John Bowler).
Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

3
CHANGES
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@ -5600,7 +5600,7 @@ Version 1.6.24beta01 [June 11, 2016]
Avoid potential overflow of the PNG_IMAGE_SIZE macro. This macro
is not used within libpng, but is used in some of the examples.
Version 1.6.24beta02 [June 19, 2016]
Version 1.6.24beta02 [June 20, 2016]
Correct filter heuristic overflow handling. This was broken when the
write filter code was moved out-of-line; if there is a single filter and
the heuristic sum overflows the calculation of the filtered line is not
@ -5616,6 +5616,7 @@ Version 1.6.24beta02 [June 19, 2016]
implemented in 1.7), however a simple safe fix here is to chose the lowest
numbered filter in the list from png_set_filter (this only works if the
first problem is also fixed) (John Bowler).
Use a more efficient absolute value calculation on SSE2 (Matthieu Darbois).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

2
contrib/intel/filter_sse2_intrinsics.c
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@ -6,7 +6,7 @@
* Derived from arm/filter_neon_intrinsics.c, which was
* Copyright (c) 2014,2016 Glenn Randers-Pehrson
*
* Last changed in libpng 1.6.22 [May 26, 2016]
* Last changed in libpng 1.6.24 [(PENDING RELEASE)]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer