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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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6
cmake/config.h.in
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@@ -10,9 +10,6 @@
/* Define to 1 if the compiler supports __builtin_expect. */
#cmakedefine HAVE_BUILTIN_EXPECT 1
/* Define to 1 if you have the <byteswap.h> header file. */
#cmakedefine HAVE_BYTESWAP_H 1
/* Define to 1 if you have a definition for mmap() in <sys/mman.h>. */
#cmakedefine HAVE_FUNC_MMAP 1
@@ -31,9 +28,6 @@
/* Define to 1 if you have the `z' library (-lz). */
#cmakedefine HAVE_LIBZ 1
/* Define to 1 if you have the <sys/endian.h> header file. */
#cmakedefine HAVE_SYS_ENDIAN_H 1
/* Define to 1 if you have the <sys/mman.h> header file. */
#cmakedefine HAVE_SYS_MMAN_H 1