mirror of https://github.com/opencv/opencv.git
kurenai
9 years ago
parent
44bda8fbb7
commit
b0a3b42287
33 changed files with 2869 additions and 1100 deletions
@ -0,0 +1,158 @@ |
||||
Enabling SSE support |
||||
|
||||
Copyright (c) 2016 Google, Inc. |
||||
Written by Mike Klein, Matt Sarett |
||||
|
||||
This INSTALL file written by Glenn Randers-Pehrson, 2016. |
||||
|
||||
If you have moved intel_init.c and filter_sse2_intrinsics.c to a different |
||||
directory, be sure to update the '#include "../../pngpriv.h"' line in both |
||||
files if necessary to point to the correct relative location of pngpriv.h |
||||
with respect to the new location of those files. |
||||
|
||||
To enable SSE support in libpng, follow the instructions in I, II, or III, |
||||
below: |
||||
|
||||
I. Using patched "configure" scripts: |
||||
|
||||
First, apply intel_sse.patch in your build directory. |
||||
|
||||
patch -i contrib/intel/intel_sse.patch -p1 |
||||
|
||||
Then, if you are not building in a new GIT clone, e.g., in a tar |
||||
distribution, remove any existing pre-built configure scripts: |
||||
|
||||
./configure --enable-maintainer-mode |
||||
make maintainer-clean |
||||
./autogen.sh --maintainer --clean |
||||
|
||||
Finally, configure libpng with -DPNG_INTEL_SSE in CPPFLAGS: |
||||
|
||||
./autogen.sh --maintainer |
||||
CPPFLAGS="-DPNG_INTEL_SSE" ./configure [options] |
||||
make CPPFLAGS="-DPNG_INTEL_SSE" [options] |
||||
make |
||||
|
||||
II. Using a custom makefile: |
||||
|
||||
If you are using a custom makefile makefile, you will have to update it |
||||
manually to include contrib/intel/*.o in the dependencies, and to define |
||||
PNG_INTEL_SSE. |
||||
|
||||
III. Using manually updated "configure" scripts: |
||||
|
||||
If you prefer, manually edit pngpriv.h, configure.ac, and Makefile.am, |
||||
following the instructions below, then follow the instructions in |
||||
section II of INSTALL in the main libpng directory, then configure libpng |
||||
with -DPNG_INTEL_SSE in CPPFLAGS. |
||||
|
||||
1. Add the following code to configure.ac under HOST SPECIFIC OPTIONS |
||||
directly beneath the section for ARM: |
||||
|
||||
-----------------cut---------------- |
||||
# INTEL |
||||
# ===== |
||||
# |
||||
# INTEL SSE (SIMD) support. |
||||
|
||||
AC_ARG_ENABLE([intel-sse], |
||||
AS_HELP_STRING([[[--enable-intel-sse]]], |
||||
[Enable Intel SSE optimizations: =no/off, yes/on:] |
||||
[no/off: disable the optimizations;] |
||||
[yes/on: enable the optimizations.] |
||||
[If not specified: determined by the compiler.]), |
||||
[case "$enableval" in |
||||
no|off) |
||||
# disable the default enabling: |
||||
AC_DEFINE([PNG_INTEL_SSE_OPT], [0], |
||||
[Disable Intel SSE optimizations]) |
||||
# Prevent inclusion of the assembler files below: |
||||
enable_intel_sse=no;; |
||||
yes|on) |
||||
AC_DEFINE([PNG_INTEL_SSE_OPT], [1], |
||||
[Enable Intel SSE optimizations]);; |
||||
*) |
||||
AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value]) |
||||
esac]) |
||||
|
||||
# Add Intel specific files to all builds where the host_cpu is Intel ('x86*') |
||||
# or where Intel optimizations were explicitly requested (this allows a |
||||
# fallback if a future host CPU does not match 'x86*') |
||||
AM_CONDITIONAL([PNG_INTEL_SSE], |
||||
[test "$enable_intel_sse" != 'no' && |
||||
case "$host_cpu" in |
||||
i?86|x86_64) :;; |
||||
*) test "$enable_intel_sse" != '';; |
||||
esac]) |
||||
-----------------cut---------------- |
||||
|
||||
2. Add the following code to Makefile.am under HOST SPECIFIC OPTIONS |
||||
directly beneath the "if PNG_ARM_NEON ... endif" statement: |
||||
|
||||
-----------------cut---------------- |
||||
if PNG_INTEL_SSE |
||||
libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += contrib/intel/intel_init.c\ |
||||
contrib/intel/filter_sse2_intrinsics.c |
||||
endif |
||||
-----------------cut---------------- |
||||
|
||||
3. Add the following lines to pngpriv.h, following the PNG_ARM_NEON_OPT |
||||
code: |
||||
|
||||
-----------------cut---------------- |
||||
#ifndef PNG_INTEL_SSE_OPT |
||||
# ifdef PNG_INTEL_SSE |
||||
/* Only check for SSE if the build configuration has been modified to |
||||
* enable SSE optimizations. This means that these optimizations will |
||||
* be off by default. See contrib/intel for more details. |
||||
*/ |
||||
# if defined(__SSE4_1__) || defined(__AVX__) || defined(__SSSE3__) || \ |
||||
defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \ |
||||
(defined(_M_IX86_FP) && _M_IX86_FP >= 2) |
||||
# define PNG_INTEL_SSE_OPT 1 |
||||
# endif |
||||
# endif |
||||
#endif |
||||
|
||||
#if PNG_INTEL_SSE_OPT > 0 |
||||
# ifndef PNG_INTEL_SSE_IMPLEMENTATION |
||||
# if defined(__SSE4_1__) || defined(__AVX__) |
||||
/* We are not actually using AVX, but checking for AVX is the best |
||||
way we can detect SSE4.1 and SSSE3 on MSVC. |
||||
*/ |
||||
# define PNG_INTEL_SSE_IMPLEMENTATION 3 |
||||
# elif defined(__SSSE3__) |
||||
# define PNG_INTEL_SSE_IMPLEMENTATION 2 |
||||
# elif defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \ |
||||
(defined(_M_IX86_FP) && _M_IX86_FP >= 2) |
||||
# define PNG_INTEL_SSE_IMPLEMENTATION 1 |
||||
# else |
||||
# define PNG_INTEL_SSE_IMPLEMENTATION 0 |
||||
# endif |
||||
# endif |
||||
|
||||
# if PNG_INTEL_SSE_IMPLEMENTATION > 0 |
||||
# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_sse2 |
||||
# endif |
||||
#endif |
||||
|
||||
-----------------cut---------------- |
||||
|
||||
4. Add the following lines to pngpriv.h, following the prototype for |
||||
png_read_filter_row_paeth4_neon: |
||||
|
||||
-----------------cut---------------- |
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_sse2,(png_row_infop |
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); |
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_sse2,(png_row_infop |
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); |
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_sse2,(png_row_infop |
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); |
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_sse2,(png_row_infop |
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); |
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_sse2,(png_row_infop |
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); |
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_sse2,(png_row_infop |
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY); |
||||
|
||||
-----------------cut---------------- |
||||
@ -0,0 +1,381 @@ |
||||
|
||||
/* filter_sse2_intrinsics.c - SSE2 optimized filter functions
|
||||
* |
||||
* Copyright (c) 2016 Google, Inc. |
||||
* Written by Mike Klein and Matt Sarett |
||||
* Derived from arm/filter_neon_intrinsics.c, which was |
||||
* Copyright (c) 2014,2016 Glenn Randers-Pehrson |
||||
* |
||||
* Last changed in libpng 1.6.24 [August 4, 2016] |
||||
* |
||||
* This code is released under the libpng license. |
||||
* For conditions of distribution and use, see the disclaimer |
||||
* and license in png.h |
||||
*/ |
||||
|
||||
#include "../../pngpriv.h" |
||||
|
||||
#ifdef PNG_READ_SUPPORTED |
||||
|
||||
#if PNG_INTEL_SSE_IMPLEMENTATION > 0 |
||||
|
||||
#include <immintrin.h> |
||||
|
||||
/* Functions in this file look at most 3 pixels (a,b,c) to predict the 4th (d).
|
||||
* They're positioned like this: |
||||
* prev: c b |
||||
* row: a d |
||||
* The Sub filter predicts d=a, Avg d=(a+b)/2, and Paeth predicts d to be |
||||
* whichever of a, b, or c is closest to p=a+b-c. |
||||
*/ |
||||
|
||||
static __m128i load4(const void* p) { |
||||
return _mm_cvtsi32_si128(*(const int*)p); |
||||
} |
||||
|
||||
static void store4(void* p, __m128i v) { |
||||
*(int*)p = _mm_cvtsi128_si32(v); |
||||
} |
||||
|
||||
static __m128i load3(const void* p) { |
||||
/* We'll load 2 bytes, then 1 byte,
|
||||
* then mask them together, and finally load into SSE. |
||||
*/ |
||||
const png_uint_16* p01 = p; |
||||
const png_byte* p2 = (const png_byte*)(p01+1); |
||||
|
||||
png_uint_32 v012 = (png_uint_32)(*p01) |
||||
| (png_uint_32)(*p2) << 16; |
||||
return load4(&v012); |
||||
} |
||||
|
||||
static void store3(void* p, __m128i v) { |
||||
/* We'll pull from SSE as a 32-bit int, then write
|
||||
* its bottom two bytes, then its third byte. |
||||
*/ |
||||
png_uint_32 v012; |
||||
store4(&v012, v); |
||||
|
||||
png_uint_16* p01 = p; |
||||
png_byte* p2 = (png_byte*)(p01+1); |
||||
*p01 = v012; |
||||
*p2 = v012 >> 16; |
||||
} |
||||
|
||||
void png_read_filter_row_sub3_sse2(png_row_infop row_info, png_bytep row, |
||||
png_const_bytep prev) |
||||
{ |
||||
/* The Sub filter predicts each pixel as the previous pixel, a.
|
||||
* There is no pixel to the left of the first pixel. It's encoded directly. |
||||
* That works with our main loop if we just say that left pixel was zero. |
||||
*/ |
||||
(void) prev; //unused parameter
|
||||
png_debug(1, "in png_read_filter_row_sub3_sse2"); |
||||
__m128i a, d = _mm_setzero_si128(); |
||||
|
||||
png_size_t rb = row_info->rowbytes; |
||||
while (rb >= 4) { |
||||
a = d; d = load4(row); |
||||
d = _mm_add_epi8(d, a); |
||||
store3(row, d); |
||||
|
||||
row += 3; |
||||
rb -= 3; |
||||
} |
||||
if (rb > 0) { |
||||
a = d; d = load3(row); |
||||
d = _mm_add_epi8(d, a); |
||||
store3(row, d); |
||||
|
||||
row += 3; |
||||
rb -= 3; |
||||
} |
||||
} |
||||
|
||||
void png_read_filter_row_sub4_sse2(png_row_infop row_info, png_bytep row, |
||||
png_const_bytep prev) |
||||
{ |
||||
/* The Sub filter predicts each pixel as the previous pixel, a.
|
||||
* There is no pixel to the left of the first pixel. It's encoded directly. |
||||
* That works with our main loop if we just say that left pixel was zero. |
||||
*/ |
||||
(void) prev; //unused parameter
|
||||
png_debug(1, "in png_read_filter_row_sub4_sse2"); |
||||
__m128i a, d = _mm_setzero_si128(); |
||||
|
||||
png_size_t rb = row_info->rowbytes; |
||||
while (rb > 0) { |
||||
a = d; d = load4(row); |
||||
d = _mm_add_epi8(d, a); |
||||
store4(row, d); |
||||
|
||||
row += 4; |
||||
rb -= 4; |
||||
} |
||||
} |
||||
|
||||
void png_read_filter_row_avg3_sse2(png_row_infop row_info, png_bytep row, |
||||
png_const_bytep prev) |
||||
{ |
||||
/* The Avg filter predicts each pixel as the (truncated) average of a and b.
|
||||
* There's no pixel to the left of the first pixel. Luckily, it's |
||||
* predicted to be half of the pixel above it. So again, this works |
||||
* perfectly with our loop if we make sure a starts at zero. |
||||
*/ |
||||
png_debug(1, "in png_read_filter_row_avg3_sse2"); |
||||
const __m128i zero = _mm_setzero_si128(); |
||||
__m128i b; |
||||
__m128i a, d = zero; |
||||
|
||||
png_size_t rb = row_info->rowbytes; |
||||
while (rb >= 4) { |
||||
b = load4(prev); |
||||
a = d; d = load4(row ); |
||||
|
||||
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ |
||||
__m128i avg = _mm_avg_epu8(a,b); |
||||
/* ...but we can fix it up by subtracting off 1 if it rounded up. */ |
||||
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b), |
||||
_mm_set1_epi8(1))); |
||||
d = _mm_add_epi8(d, avg); |
||||
store3(row, d); |
||||
|
||||
prev += 3; |
||||
row += 3; |
||||
rb -= 3; |
||||
} |
||||
if (rb > 0) { |
||||
b = load3(prev); |
||||
a = d; d = load3(row ); |
||||
|
||||
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ |
||||
__m128i avg = _mm_avg_epu8(a,b); |
||||
/* ...but we can fix it up by subtracting off 1 if it rounded up. */ |
||||
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b), |
||||
_mm_set1_epi8(1))); |
||||
|
||||
d = _mm_add_epi8(d, avg); |
||||
store3(row, d); |
||||
|
||||
prev += 3; |
||||
row += 3; |
||||
rb -= 3; |
||||
} |
||||
} |
||||
|
||||
void png_read_filter_row_avg4_sse2(png_row_infop row_info, png_bytep row, |
||||
png_const_bytep prev) |
||||
{ |
||||
/* The Avg filter predicts each pixel as the (truncated) average of a and b.
|
||||
* There's no pixel to the left of the first pixel. Luckily, it's |
||||
* predicted to be half of the pixel above it. So again, this works |
||||
* perfectly with our loop if we make sure a starts at zero. |
||||
*/ |
||||
png_debug(1, "in png_read_filter_row_avg4_sse2"); |
||||
const __m128i zero = _mm_setzero_si128(); |
||||
__m128i b; |
||||
__m128i a, d = zero; |
||||
|
||||
png_size_t rb = row_info->rowbytes; |
||||
while (rb > 0) { |
||||
b = load4(prev); |
||||
a = d; d = load4(row ); |
||||
|
||||
/* PNG requires a truncating average, so we can't just use _mm_avg_epu8 */ |
||||
__m128i avg = _mm_avg_epu8(a,b); |
||||
/* ...but we can fix it up by subtracting off 1 if it rounded up. */ |
||||
avg = _mm_sub_epi8(avg, _mm_and_si128(_mm_xor_si128(a,b), |
||||
_mm_set1_epi8(1))); |
||||
|
||||
d = _mm_add_epi8(d, avg); |
||||
store4(row, d); |
||||
|
||||
prev += 4; |
||||
row += 4; |
||||
rb -= 4; |
||||
} |
||||
} |
||||
|
||||
/* Returns |x| for 16-bit lanes. */ |
||||
static __m128i abs_i16(__m128i x) { |
||||
#if PNG_INTEL_SSE_IMPLEMENTATION >= 2 |
||||
return _mm_abs_epi16(x); |
||||
#else |
||||
/* Read this all as, return x<0 ? -x : x.
|
||||
* To negate two's complement, you flip all the bits then add 1. |
||||
*/ |
||||
__m128i is_negative = _mm_cmplt_epi16(x, _mm_setzero_si128()); |
||||
|
||||
/* Flip negative lanes. */ |
||||
x = _mm_xor_si128(x, is_negative); |
||||
|
||||
/* +1 to negative lanes, else +0. */ |
||||
x = _mm_sub_epi16(x, is_negative); |
||||
return x; |
||||
#endif |
||||
} |
||||
|
||||
/* Bytewise c ? t : e. */ |
||||
static __m128i if_then_else(__m128i c, __m128i t, __m128i e) { |
||||
#if PNG_INTEL_SSE_IMPLEMENTATION >= 3 |
||||
return _mm_blendv_epi8(e,t,c); |
||||
#else |
||||
return _mm_or_si128(_mm_and_si128(c, t), _mm_andnot_si128(c, e)); |
||||
#endif |
||||
} |
||||
|
||||
void png_read_filter_row_paeth3_sse2(png_row_infop row_info, png_bytep row, |
||||
png_const_bytep prev) |
||||
{ |
||||
/* Paeth tries to predict pixel d using the pixel to the left of it, a,
|
||||
* and two pixels from the previous row, b and c: |
||||
* prev: c b |
||||
* row: a d |
||||
* The Paeth function predicts d to be whichever of a, b, or c is nearest to |
||||
* p=a+b-c. |
||||
* |
||||
* The first pixel has no left context, and so uses an Up filter, p = b. |
||||
* This works naturally with our main loop's p = a+b-c if we force a and c |
||||
* to zero. |
||||
* Here we zero b and d, which become c and a respectively at the start of |
||||
* the loop. |
||||
*/ |
||||
png_debug(1, "in png_read_filter_row_paeth3_sse2"); |
||||
const __m128i zero = _mm_setzero_si128(); |
||||
__m128i c, b = zero, |
||||
a, d = zero; |
||||
|
||||
png_size_t rb = row_info->rowbytes; |
||||
while (rb >= 4) { |
||||
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
|
||||
* intermediates. |
||||
*/ |
||||
c = b; b = _mm_unpacklo_epi8(load4(prev), zero); |
||||
a = d; d = _mm_unpacklo_epi8(load4(row ), zero); |
||||
|
||||
/* (p-a) == (a+b-c - a) == (b-c) */ |
||||
__m128i pa = _mm_sub_epi16(b,c); |
||||
|
||||
/* (p-b) == (a+b-c - b) == (a-c) */ |
||||
__m128i pb = _mm_sub_epi16(a,c); |
||||
|
||||
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ |
||||
__m128i pc = _mm_add_epi16(pa,pb); |
||||
|
||||
pa = abs_i16(pa); /* |p-a| */ |
||||
pb = abs_i16(pb); /* |p-b| */ |
||||
pc = abs_i16(pc); /* |p-c| */ |
||||
|
||||
__m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); |
||||
|
||||
/* Paeth breaks ties favoring a over b over c. */ |
||||
__m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, |
||||
if_then_else(_mm_cmpeq_epi16(smallest, pb), b, |
||||
c)); |
||||
|
||||
/* Note `_epi8`: we need addition to wrap modulo 255. */ |
||||
d = _mm_add_epi8(d, nearest); |
||||
store3(row, _mm_packus_epi16(d,d)); |
||||
|
||||
prev += 3; |
||||
row += 3; |
||||
rb -= 3; |
||||
} |
||||
if (rb > 0) { |
||||
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
|
||||
* intermediates. |
||||
*/ |
||||
c = b; b = _mm_unpacklo_epi8(load3(prev), zero); |
||||
a = d; d = _mm_unpacklo_epi8(load3(row ), zero); |
||||
|
||||
/* (p-a) == (a+b-c - a) == (b-c) */ |
||||
__m128i pa = _mm_sub_epi16(b,c); |
||||
|
||||
/* (p-b) == (a+b-c - b) == (a-c) */ |
||||
__m128i pb = _mm_sub_epi16(a,c); |
||||
|
||||
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ |
||||
__m128i pc = _mm_add_epi16(pa,pb); |
||||
|
||||
pa = abs_i16(pa); /* |p-a| */ |
||||
pb = abs_i16(pb); /* |p-b| */ |
||||
pc = abs_i16(pc); /* |p-c| */ |
||||
|
||||
__m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); |
||||
|
||||
/* Paeth breaks ties favoring a over b over c. */ |
||||
__m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, |
||||
if_then_else(_mm_cmpeq_epi16(smallest, pb), b, |
||||
c)); |
||||
|
||||
/* Note `_epi8`: we need addition to wrap modulo 255. */ |
||||
d = _mm_add_epi8(d, nearest); |
||||
store3(row, _mm_packus_epi16(d,d)); |
||||
|
||||
prev += 3; |
||||
row += 3; |
||||
rb -= 3; |
||||
} |
||||
} |
||||
|
||||
void png_read_filter_row_paeth4_sse2(png_row_infop row_info, png_bytep row, |
||||
png_const_bytep prev) |
||||
{ |
||||
/* Paeth tries to predict pixel d using the pixel to the left of it, a,
|
||||
* and two pixels from the previous row, b and c: |
||||
* prev: c b |
||||
* row: a d |
||||
* The Paeth function predicts d to be whichever of a, b, or c is nearest to |
||||
* p=a+b-c. |
||||
* |
||||
* The first pixel has no left context, and so uses an Up filter, p = b. |
||||
* This works naturally with our main loop's p = a+b-c if we force a and c |
||||
* to zero. |
||||
* Here we zero b and d, which become c and a respectively at the start of |
||||
* the loop. |
||||
*/ |
||||
png_debug(1, "in png_read_filter_row_paeth4_sse2"); |
||||
const __m128i zero = _mm_setzero_si128(); |
||||
__m128i c, b = zero, |
||||
a, d = zero; |
||||
|
||||
png_size_t rb = row_info->rowbytes; |
||||
while (rb > 0) { |
||||
/* It's easiest to do this math (particularly, deal with pc) with 16-bit
|
||||
* intermediates. |
||||
*/ |
||||
c = b; b = _mm_unpacklo_epi8(load4(prev), zero); |
||||
a = d; d = _mm_unpacklo_epi8(load4(row ), zero); |
||||
|
||||
/* (p-a) == (a+b-c - a) == (b-c) */ |
||||
__m128i pa = _mm_sub_epi16(b,c); |
||||
|
||||
/* (p-b) == (a+b-c - b) == (a-c) */ |
||||
__m128i pb = _mm_sub_epi16(a,c); |
||||
|
||||
/* (p-c) == (a+b-c - c) == (a+b-c-c) == (b-c)+(a-c) */ |
||||
__m128i pc = _mm_add_epi16(pa,pb); |
||||
|
||||
pa = abs_i16(pa); /* |p-a| */ |
||||
pb = abs_i16(pb); /* |p-b| */ |
||||
pc = abs_i16(pc); /* |p-c| */ |
||||
|
||||
__m128i smallest = _mm_min_epi16(pc, _mm_min_epi16(pa, pb)); |
||||
|
||||
/* Paeth breaks ties favoring a over b over c. */ |
||||
__m128i nearest = if_then_else(_mm_cmpeq_epi16(smallest, pa), a, |
||||
if_then_else(_mm_cmpeq_epi16(smallest, pb), b, |
||||
c)); |
||||
|
||||
/* Note `_epi8`: we need addition to wrap modulo 255. */ |
||||
d = _mm_add_epi8(d, nearest); |
||||
store4(row, _mm_packus_epi16(d,d)); |
||||
|
||||
prev += 4; |
||||
row += 4; |
||||
rb -= 4; |
||||
} |
||||
} |
||||
|
||||
#endif /* PNG_INTEL_SSE_IMPLEMENTATION > 0 */ |
||||
#endif /* READ */ |
||||
@ -0,0 +1,54 @@ |
||||
|
||||
/* intel_init.c - SSE2 optimized filter functions
|
||||
* |
||||
* Copyright (c) 2016 Google, Inc. |
||||
* Written by Mike Klein and Matt Sarett |
||||
* Derived from arm/arm_init.c, which was |
||||
* Copyright (c) 2014,2016 Glenn Randers-Pehrson |
||||
* |
||||
* Last changed in libpng 1.6.22 [May 26, 2016] |
||||
* |
||||
* This code is released under the libpng license. |
||||
* For conditions of distribution and use, see the disclaimer |
||||
* and license in png.h |
||||
*/ |
||||
|
||||
#include "../../pngpriv.h" |
||||
|
||||
#ifdef PNG_READ_SUPPORTED |
||||
#if PNG_INTEL_SSE_IMPLEMENTATION > 0 |
||||
|
||||
void |
||||
png_init_filter_functions_sse2(png_structp pp, unsigned int bpp) |
||||
{ |
||||
/* The techniques used to implement each of these filters in SSE operate on
|
||||
* one pixel at a time. |
||||
* So they generally speed up 3bpp images about 3x, 4bpp images about 4x. |
||||
* They can scale up to 6 and 8 bpp images and down to 2 bpp images, |
||||
* but they'd not likely have any benefit for 1bpp images. |
||||
* Most of these can be implemented using only MMX and 64-bit registers, |
||||
* but they end up a bit slower than using the equally-ubiquitous SSE2. |
||||
*/ |
||||
png_debug(1, "in png_init_filter_functions_sse2"); |
||||
if (bpp == 3) |
||||
{ |
||||
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_sse2; |
||||
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_sse2; |
||||
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = |
||||
png_read_filter_row_paeth3_sse2; |
||||
} |
||||
else if (bpp == 4) |
||||
{ |
||||
pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_sse2; |
||||
pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_sse2; |
||||
pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = |
||||
png_read_filter_row_paeth4_sse2; |
||||
} |
||||
|
||||
/* No need optimize PNG_FILTER_VALUE_UP. The compiler should
|
||||
* autovectorize. |
||||
*/ |
||||
} |
||||
|
||||
#endif /* PNG_INTEL_SSE_IMPLEMENTATION > 0 */ |
||||
#endif /* PNG_READ_SUPPORTED */ |
||||
@ -0,0 +1,187 @@ |
||||
diff --git a/configure.ac b/configure.ac
|
||||
--- a/configure.ac 2016-05-25 18:59:10.000000000 -0400
|
||||
+++ b/configure.ac 2016-05-25 19:48:10.631751170 -0400
|
||||
@@ -341,16 +341,50 @@ AC_ARG_ENABLE([arm-neon],
|
||||
|
||||
AM_CONDITIONAL([PNG_ARM_NEON],
|
||||
[test "$enable_arm_neon" != 'no' &&
|
||||
case "$host_cpu" in
|
||||
arm*|aarch64*) :;;
|
||||
*) test "$enable_arm_neon" != '';;
|
||||
esac])
|
||||
|
||||
+# INTEL
|
||||
+# =====
|
||||
+#
|
||||
+# INTEL SSE (SIMD) support.
|
||||
+
|
||||
+AC_ARG_ENABLE([intel-sse],
|
||||
+ AS_HELP_STRING([[[--enable-intel-sse]]],
|
||||
+ [Enable Intel SSE optimizations: =no/off, yes/on:]
|
||||
+ [no/off: disable the optimizations;]
|
||||
+ [yes/on: enable the optimizations.]
|
||||
+ [If not specified: determined by the compiler.]),
|
||||
+ [case "$enableval" in
|
||||
+ no|off)
|
||||
+ # disable the default enabling:
|
||||
+ AC_DEFINE([PNG_INTEL_SSE_OPT], [0],
|
||||
+ [Disable Intel SSE optimizations])
|
||||
+ # Prevent inclusion of the assembler files below:
|
||||
+ enable_intel_sse=no;;
|
||||
+ yes|on)
|
||||
+ AC_DEFINE([PNG_INTEL_SSE_OPT], [1],
|
||||
+ [Enable Intel SSE optimizations]);;
|
||||
+ *)
|
||||
+ AC_MSG_ERROR([--enable-intel-sse=${enable_intel_sse}: invalid value])
|
||||
+ esac])
|
||||
+
|
||||
+# Add Intel specific files to all builds where the host_cpu is Intel ('x86*')
|
||||
+# or where Intel optimizations were explicitly requested (this allows a
|
||||
+# fallback if a future host CPU does not match 'x86*')
|
||||
+AM_CONDITIONAL([PNG_INTEL_SSE],
|
||||
+ [test "$enable_intel_sse" != 'no' &&
|
||||
+ case "$host_cpu" in
|
||||
+ i?86|x86_64) :;;
|
||||
+ *) test "$enable_intel_sse" != '';;
|
||||
+ esac])
|
||||
AC_MSG_NOTICE([[Extra options for compiler: $PNG_COPTS]])
|
||||
|
||||
# Config files, substituting as above
|
||||
AC_CONFIG_FILES([Makefile libpng.pc:libpng.pc.in])
|
||||
AC_CONFIG_FILES([libpng-config:libpng-config.in],
|
||||
[chmod +x libpng-config])
|
||||
|
||||
AC_OUTPUT
|
||||
diff --git a/Makefile.am b/Makefile.am
|
||||
--- a/Makefile.am 2016-05-17 18:15:12.000000000 -0400
|
||||
+++ b/Makefile.am 2016-05-25 19:48:10.631751170 -0400
|
||||
@@ -92,16 +92,20 @@ libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SO
|
||||
pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c\
|
||||
png.h pngconf.h pngdebug.h pnginfo.h pngpriv.h pngstruct.h pngusr.dfa
|
||||
|
||||
if PNG_ARM_NEON
|
||||
libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += arm/arm_init.c\
|
||||
arm/filter_neon.S arm/filter_neon_intrinsics.c
|
||||
endif
|
||||
|
||||
+if PNG_INTEL_SSE
|
||||
+libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES += contrib/intel/intel_init.c\
|
||||
+ contrib/intel/filter_sse2_intrinsics.c
|
||||
+endif
|
||||
nodist_libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_SOURCES = pnglibconf.h
|
||||
|
||||
libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@_la_LDFLAGS = -no-undefined -export-dynamic \
|
||||
-version-number @PNGLIB_MAJOR@@PNGLIB_MINOR@:@PNGLIB_RELEASE@:0
|
||||
|
||||
if HAVE_LD_VERSION_SCRIPT
|
||||
# Versioned symbols and restricted exports
|
||||
if HAVE_SOLARIS_LD
|
||||
diff --git a/pngpriv.h b/pngpriv.h
|
||||
--- a/pngpriv.h 2016-08-01 18:13:38.770128810 -0500
|
||||
+++ b/pngpriv.h 2016-08-01 18:50:19.130179017 -0500
|
||||
@@ -177,16 +177,52 @@
|
||||
# endif /* !PNG_ARM_NEON_IMPLEMENTATION */
|
||||
|
||||
# ifndef PNG_ARM_NEON_IMPLEMENTATION
|
||||
/* Use the intrinsics code by default. */
|
||||
# define PNG_ARM_NEON_IMPLEMENTATION 1
|
||||
# endif
|
||||
#endif /* PNG_ARM_NEON_OPT > 0 */
|
||||
|
||||
+#ifndef PNG_INTEL_SSE_OPT
|
||||
+# ifdef PNG_INTEL_SSE
|
||||
+ /* Only check for SSE if the build configuration has been modified to
|
||||
+ * enable SSE optimizations. This means that these optimizations will
|
||||
+ * be off by default. See contrib/intel for more details.
|
||||
+ */
|
||||
+# if defined(__SSE4_1__) || defined(__AVX__) || defined(__SSSE3__) || \
|
||||
+ defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \
|
||||
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
|
||||
+# define PNG_INTEL_SSE_OPT 1
|
||||
+# endif
|
||||
+# endif
|
||||
+#endif
|
||||
+
|
||||
+#if PNG_INTEL_SSE_OPT > 0
|
||||
+# ifndef PNG_INTEL_SSE_IMPLEMENTATION
|
||||
+# if defined(__SSE4_1__) || defined(__AVX__)
|
||||
+ /* We are not actually using AVX, but checking for AVX is the best
|
||||
+ way we can detect SSE4.1 and SSSE3 on MSVC.
|
||||
+ */
|
||||
+# define PNG_INTEL_SSE_IMPLEMENTATION 3
|
||||
+# elif defined(__SSSE3__)
|
||||
+# define PNG_INTEL_SSE_IMPLEMENTATION 2
|
||||
+# elif defined(__SSE2__) || defined(_M_X64) || defined(_M_AMD64) || \
|
||||
+ (defined(_M_IX86_FP) && _M_IX86_FP >= 2)
|
||||
+# define PNG_INTEL_SSE_IMPLEMENTATION 1
|
||||
+# else
|
||||
+# define PNG_INTEL_SSE_IMPLEMENTATION 0
|
||||
+# endif
|
||||
+# endif
|
||||
+
|
||||
+# if PNG_INTEL_SSE_IMPLEMENTATION > 0
|
||||
+# define PNG_FILTER_OPTIMIZATIONS png_init_filter_functions_sse2
|
||||
+# endif
|
||||
+#endif
|
||||
+
|
||||
/* Is this a build of a DLL where compilation of the object modules requires
|
||||
* different preprocessor settings to those required for a simple library? If
|
||||
* so PNG_BUILD_DLL must be set.
|
||||
*
|
||||
* If libpng is used inside a DLL but that DLL does not export the libpng APIs
|
||||
* PNG_BUILD_DLL must not be set. To avoid the code below kicking in build a
|
||||
* static library of libpng then link the DLL against that.
|
||||
*/
|
||||
@@ -1185,16 +1221,31 @@ PNG_INTERNAL_FUNCTION(void,png_read_filt
|
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_neon,(png_row_infop
|
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_neon,(png_row_infop
|
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_neon,(png_row_infop
|
||||
row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
#endif
|
||||
+
|
||||
+#if PNG_INTEL_SSE_IMPLEMENTATION > 0
|
||||
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub3_sse2,(png_row_infop
|
||||
+ row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_sub4_sse2,(png_row_infop
|
||||
+ row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg3_sse2,(png_row_infop
|
||||
+ row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_avg4_sse2,(png_row_infop
|
||||
+ row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth3_sse2,(png_row_infop
|
||||
+ row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
+PNG_INTERNAL_FUNCTION(void,png_read_filter_row_paeth4_sse2,(png_row_infop
|
||||
+ row_info, png_bytep row, png_const_bytep prev_row),PNG_EMPTY);
|
||||
+#endif
|
||||
|
||||
/* Choose the best filter to use and filter the row data */
|
||||
PNG_INTERNAL_FUNCTION(void,png_write_find_filter,(png_structrp png_ptr,
|
||||
png_row_infop row_info),PNG_EMPTY);
|
||||
|
||||
#ifdef PNG_SEQUENTIAL_READ_SUPPORTED
|
||||
PNG_INTERNAL_FUNCTION(void,png_read_IDAT_data,(png_structrp png_ptr,
|
||||
png_bytep output, png_alloc_size_t avail_out),PNG_EMPTY);
|
||||
@@ -1914,16 +1965,20 @@ PNG_INTERNAL_FUNCTION(void, PNG_FILTER_O
|
||||
/* List *all* the possible optimizations here - this branch is required if
|
||||
* the builder of libpng passes the definition of PNG_FILTER_OPTIMIZATIONS in
|
||||
* CFLAGS in place of CPPFLAGS *and* uses symbol prefixing.
|
||||
*/
|
||||
# if PNG_ARM_NEON_OPT > 0
|
||||
PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_neon,
|
||||
(png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
|
||||
# endif
|
||||
+# if PNG_INTEL_SSE_IMPLEMENTATION > 0
|
||||
+PNG_INTERNAL_FUNCTION(void, png_init_filter_functions_sse2,
|
||||
+ (png_structp png_ptr, unsigned int bpp), PNG_EMPTY);
|
||||
+# endif
|
||||
#endif
|
||||
|
||||
PNG_INTERNAL_FUNCTION(png_uint_32, png_check_keyword, (png_structrp png_ptr,
|
||||
png_const_charp key, png_bytep new_key), PNG_EMPTY);
|
||||
|
||||
/* Maintainer: Put new private prototypes here ^ */
|
||||
|
||||
#include "pngdebug.h"
|
||||
Loading…
Reference in new issue