Advertise the new AVX2 SIMD extensions

(our story so far ...)

diff --git a/ChangeLog.md b/ChangeLog.md
index 75bb04039bd8668d33b1a0be86726e031bcf77d1..6465123c8a0679f37132164e059cc252b5cd21ae 100644 (file)
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,16 @@
+1.6 pre-beta
+============
+
+### Significant changes relative to 1.5.2:
+
+1. Added AVX2 SIMD implementations of the colorspace conversion, chroma
+downsampling and upsampling, and integer quantization algorithms.  This speeds
+up the compression of RGB images by approximately 10-20% when using 64-bit code
+and 8-16% when using 32-bit code, and the decompression of RGB images by
+approximately 6-15% when using 64-bit code and 4-12% when using 32-bit code.
+(As tested on a 3 GHz Intel Core i7.  Actual mileage may vary.)
+
+
 1.5.2
 =====
 

diff --git a/README.md b/README.md
index 74e6eac45a78b7c4817b2c85373c1673dfb3d5a2..d54feb7cf96ea928bc46168fec71f26e06da2512 100755 (executable)
--- a/README.md
+++ b/README.md
@@ -2,8 +2,8 @@ Background
 ==========
 
 libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2,
-NEON, AltiVec) to accelerate baseline JPEG compression and decompression on
-x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is
+AVX2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression
+on x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is
 generally 2-6x as fast as libjpeg, all else being equal.  On other types of
 systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by
 virtue of its highly-optimized Huffman coding routines.  In many cases, the

diff --git a/release/ReadMe.txt b/release/ReadMe.txt
index 7fb8d0f60f09a68df309b2e4c582438a96ac99bb..a3bafd930e867ad67519924d9fcf2fca6cae1783 100644 (file)
--- a/release/ReadMe.txt
+++ b/release/ReadMe.txt
@@ -1,4 +1,4 @@
-libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal.  On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines.  In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs.
+libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, AVX2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is generally 2-6x as fast as libjpeg, all else being equal.  On other types of systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by virtue of its highly-optimized Huffman coding routines.  In many cases, the performance of libjpeg-turbo rivals that of proprietary high-speed JPEG codecs.
 
 libjpeg-turbo implements both the traditional libjpeg API as well as the less powerful but more straightforward TurboJPEG API.  libjpeg-turbo also features colorspace extensions that allow it to compress from/decompress to 32-bit and big-endian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface.
 

diff --git a/release/deb-control.tmpl b/release/deb-control.tmpl
index 681721d339d71957dbd9e14436941e3163e11f6c..a3cf723f8053d37ef079c888ea633ec16229a6d5 100644 (file)
--- a/release/deb-control.tmpl
+++ b/release/deb-control.tmpl
@@ -9,8 +9,8 @@ Homepage: http://www.libjpeg-turbo.org
 Installed-Size: {__SIZE}
 Description: A SIMD-accelerated JPEG codec that provides both the libjpeg and TurboJPEG APIs
  libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2,
- NEON, AltiVec) to accelerate baseline JPEG compression and decompression on
- x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is
+ AVX2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression
+ on x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is
  generally 2-6x as fast as libjpeg, all else being equal.  On other types of
  systems, libjpeg-turbo can still outperform libjpeg by a significant amount,
  by virtue of its highly-optimized Huffman coding routines.  In many cases, the

diff --git a/release/libjpeg-turbo.spec.in b/release/libjpeg-turbo.spec.in
index 4b792d7a35af19920be9f2b7006834850a047c1b..f1ac43ad84d46a185e1649d1994783684bf87daa 100644 (file)
--- a/release/libjpeg-turbo.spec.in
+++ b/release/libjpeg-turbo.spec.in
@@ -44,8 +44,8 @@ Provides: %{name} = %{version}-%{release}, @PACKAGE_NAME@ = %{version}-%{release
 
 %description
 libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2,
-NEON, AltiVec) to accelerate baseline JPEG compression and decompression on
-x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is
+AVX2, NEON, AltiVec) to accelerate baseline JPEG compression and decompression
+on x86, x86-64, ARM, and PowerPC systems.  On such systems, libjpeg-turbo is
 generally 2-6x as fast as libjpeg, all else being equal.  On other types of
 systems, libjpeg-turbo can still outperform libjpeg by a significant amount, by
 virtue of its highly-optimized Huffman coding routines.  In many cases, the