third_party/zlib/README.chromium - Issue 552123005: Integrate SIMD optimisations for zlib

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Unified Diff: third_party/zlib/README.chromium

Issue 552123005: Integrate SIMD optimisations for zlib (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Fix issues in fallback (non-SIMD) code Created 6 years, 3 months ago

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Index: third_party/zlib/README.chromium

diff --git a/third_party/zlib/README.chromium b/third_party/zlib/README.chromium

index c9e06bae394c4334af5ac0874a6f2ebd467271e4..be359889018b2ea136f94e6ada97815f5e1a2d80 100644

--- a/third_party/zlib/README.chromium

+++ b/third_party/zlib/README.chromium

@@ -19,3 +19,16 @@ The 'google.patch' file represents our changes from the original zlib-1.2.5.

A more significant change to support mixed-source data compression. See

crbug.com/139744 and mixed-source.patch.

+Integrated Intel SIMD optimisations from: https://github.com/jtkukunas/zlib/

+and modified to accomodate the older version and existing changes in tree.

+This introduces new files: crc_folding.c, fill_window_sse.c and x86.[ch].

+Other changes to accomodate:

+- fill_window() implementation calls into _sse() variant when supported and the

+ original implementation renamed to _c()

+- UPDATE_HASH was moved to deflate.h and it's paramaters changed to reflect the

+ change in scope for sharing between fill_window() implementations

+- read_buf was moved from local to ZLIB_INTERNAL

+- INSERT_STRING macro was made a function, insert_string() and an implementation using CRC instruction added