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[GNUnet-SVN] [libmicrohttpd] 02/03: mhd_bithelpers.h: use bytes swap ins
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Subject: |
[GNUnet-SVN] [libmicrohttpd] 02/03: mhd_bithelpers.h: use bytes swap instead of individual bytes assignment when endianess is known to significantly speedup MD5 and SHA256 calculations. Use built-in bytes swap when available. |
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Date: |
Fri, 19 Apr 2019 21:36:31 +0200 |
This is an automated email from the git hooks/post-receive script.
karlson2k pushed a commit to branch master
in repository libmicrohttpd.
commit a50b4d566f089ae46402a6f38096a0ff9c50eae2
Author: Evgeny Grin (Karlson2k) <address@hidden>
AuthorDate: Fri Apr 19 22:07:37 2019 +0300
mhd_bithelpers.h: use bytes swap instead of individual bytes
assignment when endianess is known to significantly speedup MD5 and
SHA256 calculations.
Use built-in bytes swap when available.
---
configure.ac | 14 ++++++++
src/microhttpd/mhd_bithelpers.h | 78 +++++++++++++++++++++++++++++++++--------
2 files changed, 77 insertions(+), 15 deletions(-)
diff --git a/configure.ac b/configure.ac
index 62f5ed5e..c977f746 100644
--- a/configure.ac
+++ b/configure.ac
@@ -662,6 +662,20 @@ AX_CHECK_LINK_FLAG([-fno-strict-aliasing],
AC_C_BIGENDIAN
AC_C_VARARRAYS
+AC_CACHE_CHECK([[whether __builtin_bswap32() is available]],
+ [[mhd_cv_func___builtin_bswap32_avail]], [dnl
+ AC_TRY_LINK([#include<stdint.h>],[uint32_t a = 1; uint32_t b =
__builtin_bswap32(a); a = b;],
+ [[mhd_cv_func___builtin_bswap32_avail="yes"]],
[[mhd_cv_func___builtin_bswap32_avail="no"]])
+])
+AS_IF([[test "x$mhd_cv_func___builtin_bswap32_avail" = "xyes"]],
+ [AC_DEFINE([[MHD_HAVE___BUILTIN_BSWAP32]], [[1]], [Define to 1 if you have
__builtin_bswap32() builtin function])])
+AC_CACHE_CHECK([[whether __builtin_bswap64() is available]],
+ [[mhd_cv_func___builtin_bswap64_avail]], [dnl
+ AC_TRY_LINK([#include<stdint.h>],[uint64_t a = 1; uint32_t b =
__builtin_bswap64(a); a = b;],
+ [[mhd_cv_func___builtin_bswap64_avail="yes"]],
[[mhd_cv_func___builtin_bswap64_avail="no"]])
+])
+AS_IF([[test "x$mhd_cv_func___builtin_bswap64_avail" = "xyes"]],
+ [AC_DEFINE([[MHD_HAVE___BUILTIN_BSWAP64]], [[1]], [Define to 1 if you have
__builtin_bswap64() builtin function])])
AC_CHECK_PROG([HAVE_CURL_BINARY],[curl],[yes],[no])
AM_CONDITIONAL([HAVE_CURL_BINARY],[test "x$HAVE_CURL_BINARY" = "xyes"])
diff --git a/src/microhttpd/mhd_bithelpers.h b/src/microhttpd/mhd_bithelpers.h
index bf20293f..fa09f92a 100644
--- a/src/microhttpd/mhd_bithelpers.h
+++ b/src/microhttpd/mhd_bithelpers.h
@@ -29,6 +29,34 @@
#include "mhd_byteorder.h"
#include <stdint.h>
+
+#ifdef MHD_HAVE___BUILTIN_BSWAP32
+#define _MHD_BYTES_SWAP32(value32) \
+ ((uint32_t)__builtin_bswap32((uint32_t)value32))
+#else /* ! MHD_HAVE___BUILTIN_BSWAP32 */
+#define _MHD_BYTES_SWAP32(value32) \
+ ( (((uint32_t)(value32)) << 24) | \
+ ((((uint32_t)(value32)) & ((uint32_t)0x0000FF00)) << 8) | \
+ ((((uint32_t)(value32)) & ((uint32_t)0x00FF0000)) >> 8) | \
+ (((uint32_t)(value32)) >> 24) )
+#endif /* ! MHD_HAVE___BUILTIN_BSWAP32 */
+
+
+#ifdef MHD_HAVE___BUILTIN_BSWAP64
+#define _MHD_BYTES_SWAP64(value64) \
+ ((uint64_t)__builtin_bswap64((uint64_t)value64))
+#else /* ! MHD_HAVE___BUILTIN_BSWAP64 */
+#define _MHD_BYTES_SWAP64(value64) \
+ ( (((uint64_t)(value64)) << 56) | \
+ ((((uint64_t)(value64)) & ((uint64_t)0x000000000000FF00)) << 40) | \
+ ((((uint64_t)(value64)) & ((uint64_t)0x0000000000FF0000)) << 24) | \
+ ((((uint64_t)(value64)) & ((uint64_t)0x00000000FF000000)) << 8) | \
+ ((((uint64_t)(value64)) & ((uint64_t)0x000000FF00000000)) >> 8) | \
+ ((((uint64_t)(value64)) & ((uint64_t)0x0000FF0000000000)) >> 24) | \
+ ((((uint64_t)(value64)) & ((uint64_t)0x00FF000000000000)) >> 40) | \
+ (((uint64_t)(value64)) >> 56) )
+#endif /* ! MHD_HAVE___BUILTIN_BSWAP64 */
+
/* _MHD_PUT_64BIT_LE (addr, value64)
* put native-endian 64-bit value64 to addr
* in little-endian mode.
@@ -36,8 +64,12 @@
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
#define _MHD_PUT_64BIT_LE(addr, value64) \
((*(uint64_t*)(addr)) = (uint64_t)(value64))
-#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
-#define _MHD_PUT_64BIT_LE(addr, value64) do { \
+#elif _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
+#define _MHD_PUT_64BIT_LE(addr, value64) \
+ ((*(uint64_t*)(addr)) = _MHD_BYTES_SWAP64(value64))
+#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
+/* Endianess was not detected or non-standard like PDP-endian */
+#define _MHD_PUT_64BIT_LE(addr, value64) do { \
((uint8_t*)(addr))[0] = (uint8_t)((uint64_t)(value64)); \
((uint8_t*)(addr))[1] = (uint8_t)(((uint64_t)(value64)) >> 8); \
((uint8_t*)(addr))[2] = (uint8_t)(((uint64_t)(value64)) >> 16); \
@@ -47,23 +79,27 @@
((uint8_t*)(addr))[6] = (uint8_t)(((uint64_t)(value64)) >> 48); \
((uint8_t*)(addr))[7] = (uint8_t)(((uint64_t)(value64)) >> 56); \
} while (0)
-#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
+#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* _MHD_PUT_32BIT_LE (addr, value32)
* put native-endian 32-bit value32 to addr
* in little-endian mode.
*/
#if _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
-#define _MHD_PUT_32BIT_LE(addr, value32) \
+#define _MHD_PUT_32BIT_LE(addr,value32) \
((*(uint32_t*)(addr)) = (uint32_t)(value32))
-#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
-#define _MHD_PUT_32BIT_LE(addr, value32) do { \
+#elif _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
+#define _MHD_PUT_32BIT_LE(addr, value32) \
+ ((*(uint32_t*)(addr)) = _MHD_BYTES_SWAP32(value32))
+#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
+/* Endianess was not detected or non-standard like PDP-endian */
+#define _MHD_PUT_32BIT_LE(addr, value32) do { \
((uint8_t*)(addr))[0] = (uint8_t)((uint32_t)(value32)); \
((uint8_t*)(addr))[1] = (uint8_t)(((uint32_t)(value32)) >> 8); \
((uint8_t*)(addr))[2] = (uint8_t)(((uint32_t)(value32)) >> 16); \
((uint8_t*)(addr))[3] = (uint8_t)(((uint32_t)(value32)) >> 24); \
} while (0)
-#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
+#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
/* _MHD_PUT_64BIT_BE (addr, value64)
@@ -73,8 +109,12 @@
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_PUT_64BIT_BE(addr, value64) \
((*(uint64_t*)(addr)) = (uint64_t)(value64))
-#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
-#define _MHD_PUT_64BIT_BE(addr, value64) do { \
+#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
+#define _MHD_PUT_64BIT_BE(addr, value64) \
+ ((*(uint64_t*)(addr)) = _MHD_BYTES_SWAP64(value64))
+#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
+/* Endianess was not detected or non-standard like PDP-endian */
+#define _MHD_PUT_64BIT_BE(addr, value64) do { \
((uint8_t*)(addr))[7] = (uint8_t)((uint64_t)(value64)); \
((uint8_t*)(addr))[6] = (uint8_t)(((uint64_t)(value64)) >> 8); \
((uint8_t*)(addr))[5] = (uint8_t)(((uint64_t)(value64)) >> 16); \
@@ -84,7 +124,7 @@
((uint8_t*)(addr))[1] = (uint8_t)(((uint64_t)(value64)) >> 48); \
((uint8_t*)(addr))[0] = (uint8_t)(((uint64_t)(value64)) >> 56); \
} while (0)
-#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
+#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* _MHD_PUT_32BIT_BE (addr, value32)
* put native-endian 32-bit value32 to addr
@@ -93,14 +133,18 @@
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_PUT_32BIT_BE(addr, value32) \
((*(uint32_t*)(addr)) = (uint32_t)(value32))
-#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
-#define _MHD_PUT_32BIT_BE(addr, value32) do { \
+#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
+#define _MHD_PUT_32BIT_BE(addr, value32) \
+ ((*(uint32_t*)(addr)) = _MHD_BYTES_SWAP32(value32))
+#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
+/* Endianess was not detected or non-standard like PDP-endian */
+#define _MHD_PUT_32BIT_BE(addr, value32) do { \
((uint8_t*)(addr))[3] = (uint8_t)((uint32_t)(value32)); \
((uint8_t*)(addr))[2] = (uint8_t)(((uint32_t)(value32)) >> 8); \
((uint8_t*)(addr))[1] = (uint8_t)(((uint32_t)(value32)) >> 16); \
((uint8_t*)(addr))[0] = (uint8_t)(((uint32_t)(value32)) >> 24); \
} while (0)
-#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
+#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/* _MHD_GET_32BIT_BE (addr)
* get big-endian 32-bit value storied at addr
@@ -109,13 +153,17 @@
#if _MHD_BYTE_ORDER == _MHD_BIG_ENDIAN
#define _MHD_GET_32BIT_BE(addr) \
(*(uint32_t*)(addr))
-#else /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
+#elif _MHD_BYTE_ORDER == _MHD_LITTLE_ENDIAN
+#define _MHD_GET_32BIT_BE(addr) \
+ _MHD_BYTES_SWAP32(*(uint32_t*)(addr))
+#else /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
+/* Endianess was not detected or non-standard like PDP-endian */
#define _MHD_GET_32BIT_BE(addr) \
( (((uint32_t)(((uint8_t*)addr)[0])) << 24) | \
(((uint32_t)(((uint8_t*)addr)[1])) << 16) | \
(((uint32_t)(((uint8_t*)addr)[2])) << 8) | \
((uint32_t) (((uint8_t*)addr)[3])) )
-#endif /* _MHD_BYTE_ORDER != _MHD_BIG_ENDIAN */
+#endif /* _MHD_BYTE_ORDER != _MHD_LITTLE_ENDIAN */
/**
* Rotate right 32-bit value by number of bits.
--
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