[Ffmpeg-cvslog] r8803 - in trunk: configure libavutil/intreadwrite.h
benoit
subversion
Wed Apr 25 10:47:16 CEST 2007
Author: benoit
Date: Wed Apr 25 10:47:15 2007
New Revision: 8803
Log:
"fast unaligned" bytestream functions
patch by Ramiro Polla ramiro lisha ufsc br
original thread:
date: 03/11/2007 03:06 AM
subject: [Ffmpeg-devel] [PATCH] Machine endian bytestream functions
Modified:
trunk/configure
trunk/libavutil/intreadwrite.h
Modified: trunk/configure
==============================================================================
--- trunk/configure (original)
+++ trunk/configure Wed Apr 25 10:47:15 2007
@@ -628,6 +628,7 @@ HAVE_LIST="
ebx_available
fast_64bit
fast_cmov
+ fast_unaligned
freetype2
imlib2
inet_aton
@@ -765,6 +766,7 @@ powerpc_perf="no"
mmx="default"
cmov="no"
fast_cmov="no"
+fast_unaligned="no"
armv5te="default"
armv6="default"
iwmmxt="default"
@@ -975,9 +977,11 @@ done
case "$arch" in
i386|i486|i586|i686|i86pc|BePC)
arch="x86_32"
+ enable fast_unaligned
;;
x86_64|amd64)
arch="x86_32"
+ enable fast_unaligned
canon_arch="`$cc -dumpmachine | sed -e 's,\([^-]*\)-.*,\1,'`"
if [ x"$canon_arch" = x"x86_64" -o x"$canon_arch" = x"amd64" ]; then
if [ -z "`echo $CFLAGS | grep -- -m32`" ]; then
Modified: trunk/libavutil/intreadwrite.h
==============================================================================
--- trunk/libavutil/intreadwrite.h (original)
+++ trunk/libavutil/intreadwrite.h Wed Apr 25 10:47:15 2007
@@ -50,6 +50,21 @@ struct unaligned_16 { uint16_t l; } __at
#define AV_RL8(x) AV_RB8(x)
#define AV_WL8(p, d) AV_WB8(p, d)
+#ifdef HAVE_FAST_UNALIGNED
+# ifdef WORDS_BIGENDIAN
+# define AV_RB16(x) LD16(x)
+# define AV_WB16(p, d) ST16(p, d)
+
+# define AV_RL16(x) bswap_16(LD16(x))
+# define AV_WL16(p, d) ST16(p, bswap_16(d))
+# else /* WORDS_BIGENDIAN */
+# define AV_RB16(x) bswap_16(LD16(x))
+# define AV_WB16(p, d) ST16(p, bswap_16(d))
+
+# define AV_RL16(x) LD16(x)
+# define AV_WL16(p, d) ST16(p, d)
+# endif
+#else /* HAVE_FAST_UNALIGNED */
#define AV_RB16(x) ((((uint8_t*)(x))[0] << 8) | ((uint8_t*)(x))[1])
#define AV_WB16(p, d) { \
((uint8_t*)(p))[1] = (d); \
@@ -60,6 +75,7 @@ struct unaligned_16 { uint16_t l; } __at
#define AV_WL16(p, d) { \
((uint8_t*)(p))[0] = (d); \
((uint8_t*)(p))[1] = (d)>>8; }
+#endif
#define AV_RB24(x) ((((uint8_t*)(x))[0] << 16) | \
(((uint8_t*)(x))[1] << 8) | \
@@ -77,6 +93,21 @@ struct unaligned_16 { uint16_t l; } __at
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; }
+#ifdef HAVE_FAST_UNALIGNED
+# ifdef WORDS_BIGENDIAN
+# define AV_RB32(x) LD32(x)
+# define AV_WB32(p, d) ST32(p, d)
+
+# define AV_RL32(x) bswap_32(LD32(x))
+# define AV_WL32(p, d) ST32(p, bswap_32(d))
+# else /* WORDS_BIGENDIAN */
+# define AV_RB32(x) bswap_32(LD32(x))
+# define AV_WB32(p, d) ST32(p, bswap_32(d))
+
+# define AV_RL32(x) LD32(x)
+# define AV_WL32(p, d) ST32(p, d)
+# endif
+#else /* HAVE_FAST_UNALIGNED */
#define AV_RB32(x) ((((uint8_t*)(x))[0] << 24) | \
(((uint8_t*)(x))[1] << 16) | \
(((uint8_t*)(x))[2] << 8) | \
@@ -96,5 +127,6 @@ struct unaligned_16 { uint16_t l; } __at
((uint8_t*)(p))[1] = (d)>>8; \
((uint8_t*)(p))[2] = (d)>>16; \
((uint8_t*)(p))[3] = (d)>>24; }
+#endif
#endif /* INTREADWRITE_H */
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