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Remove platform-dependent code for little-endian loads and stores.

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The platform-independent code that breaks down the loads and stores into
byte-level operations is optimized into single instructions (mov or
ldr/str) and instruction pairs (mov+bswap or ldr/str+rev) by recent
versions of Clang and GCC. Tested at https://godbolt.org/z/2BQP-o

PiperOrigin-RevId: 306321608
This commit is contained in:
Victor Costan
2020-04-13 22:30:24 +00:00
parent a4cdb5d133
commit 27ff130ff9
3 changed files with 60 additions and 109 deletions
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2
CMakeLists.txt
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@@ -55,8 +55,6 @@ include(TestBigEndian)
test_big_endian(SNAPPY_IS_BIG_ENDIAN)
include(CheckIncludeFile)
check_include_file("byteswap.h" HAVE_BYTESWAP_H)
check_include_file("sys/endian.h" HAVE_SYS_ENDIAN_H)
check_include_file("sys/mman.h" HAVE_SYS_MMAN_H)
check_include_file("sys/resource.h" HAVE_SYS_RESOURCE_H)
check_include_file("sys/time.h" HAVE_SYS_TIME_H)