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Explain why there are no multiple inclusion guards in these header files.

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Originally committed as revision 10771 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Diego Biurrun
2007-10-17 22:29:13 +00:00
parent 9b1f04b08b
commit deb43f0bd8
3 changed files with 12 additions and 0 deletions
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4
libavcodec/i386/dsputil_mmx_avg.h
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@@ -24,6 +24,10 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/ */
/* This header intentionally has no multiple inclusion guards. It is meant to
* be included multiple times and generates different code depending on the
* value of certain #defines. */
/* XXX: we use explicit registers to avoid a gcc 2.95.2 register asm /* XXX: we use explicit registers to avoid a gcc 2.95.2 register asm
clobber bug - now it will work with 2.95.2 and also with -fPIC clobber bug - now it will work with 2.95.2 and also with -fPIC
*/ */

4
libavcodec/i386/dsputil_mmx_qns.h
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@@ -22,6 +22,10 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/ */
/* This header intentionally has no multiple inclusion guards. It is meant to
* be included multiple times and generates different code depending on the
* value of certain #defines. */
#define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0)) #define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0))
static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale) static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale)

4
libavcodec/i386/dsputil_mmx_rnd.h
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@@ -24,6 +24,10 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/ */
/* This header intentionally has no multiple inclusion guards. It is meant to
* be included multiple times and generates different code depending on the
* value of certain #defines. */
// put_pixels // put_pixels
static void DEF(put, pixels8_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h) static void DEF(put, pixels8_x2)(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{ {