[SCM] libav/experimental: * implemented remaing avg_ pixel functions (these are not used offen)

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit d3cd07425a3781709f53effae6d21d3b3504cdaa
Author: Zdenek Kabelac <kabi at informatics.muni.cz>
Date:   Mon Jun 3 17:31:46 2002 +0000

    * implemented remaing avg_ pixel functions (these are not used offen)
    
    Originally committed as revision 656 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/i386/dsputil_mmx_rnd.h b/libavcodec/i386/dsputil_mmx_rnd.h
index 585fdb0..dc70c9c 100644
--- a/libavcodec/i386/dsputil_mmx_rnd.h
+++ b/libavcodec/i386/dsputil_mmx_rnd.h
@@ -65,8 +65,8 @@ static void DEF(put, pixels_y2)(UINT8 *block, const UINT8 *pixels, int line_size
 	"movq	(%1, %3), %%mm1		\n\t"
 	"movq	(%1, %%eax),%%mm2	\n\t"
 	PAVGBP(%%mm1, %%mm0, %%mm4,   %%mm2, %%mm1, %%mm5)
-        "movq	%%mm4, (%2)		\n\t"
-        "movq	%%mm5, (%2, %3)		\n\t"
+	"movq	%%mm4, (%2)		\n\t"
+	"movq	%%mm5, (%2, %3)		\n\t"
 	"addl	%%eax, %1		\n\t"
 	"addl	%%eax, %2		\n\t"
 	"movq	(%1, %3), %%mm1		\n\t"
@@ -100,7 +100,7 @@ static void DEF(put, pixels_xy2)(UINT8 *block, const UINT8 *pixels, int line_siz
 	"paddusw %%mm1, %%mm5		\n\t"
 	"xorl	%%eax, %%eax		\n\t"
 	"addl	%3, %1			\n\t"
-	".balign 4			\n\t"
+	".balign 8      		\n\t"
 	"1:				\n\t"
 	"movq	(%1, %%eax), %%mm0	\n\t"
 	"movq	1(%1, %%eax), %%mm2	\n\t"
@@ -150,3 +150,156 @@ static void DEF(put, pixels_xy2)(UINT8 *block, const UINT8 *pixels, int line_siz
 }
 
 // avg_pixels
+// in case more speed is needed - unroling would certainly help
+static void DEF(avg, pixels)(UINT8 *block, const UINT8 *pixels, int line_size, int h)
+{
+    MOVQ_BFE(mm6);
+    JUMPALIGN();
+    do {
+	__asm __volatile(
+	     "movq  %0, %%mm0		\n\t"
+	     "movq  %1, %%mm1		\n\t"
+	     PAVGB(%%mm0, %%mm1, %%mm2, %%mm6)
+	     "movq  %%mm2, %0		\n\t"
+	     :"+m"(*block)
+	     :"m"(*pixels)
+	     :"memory");
+	pixels += line_size;
+	block += line_size;
+    }
+    while (--h);
+}
+
+static void DEF(avg, pixels_x2)(UINT8 *block, const UINT8 *pixels, int line_size, int h)
+{
+    MOVQ_BFE(mm6);
+    JUMPALIGN();
+    do {
+	__asm __volatile(
+	    "movq  %1, %%mm0		\n\t"
+	    "movq  1%1, %%mm1		\n\t"
+	    "movq  %0, %%mm3		\n\t"
+	    PAVGB(%%mm0, %%mm1, %%mm2, %%mm6)
+	    PAVGB(%%mm3, %%mm2, %%mm0, %%mm6)
+	    "movq  %%mm0, %0		\n\t"
+	    :"+m"(*block)
+	    :"m"(*pixels)
+	    :"memory");
+	pixels += line_size;
+	block += line_size;
+    } while (--h);
+}
+
+static void DEF(avg, pixels_y2)(UINT8 *block, const UINT8 *pixels, int line_size, int h)
+{
+    MOVQ_BFE(mm6);
+    __asm __volatile(
+	"lea	(%3, %3), %%eax		\n\t"
+	"movq	(%1), %%mm0		\n\t"
+	".balign 8			\n\t"
+	"1:				\n\t"
+	"movq	(%1, %3), %%mm1		\n\t"
+	"movq	(%1, %%eax), %%mm2	\n\t"
+	PAVGBP(%%mm1, %%mm0, %%mm4,   %%mm2, %%mm1, %%mm5)
+	"movq	(%2), %%mm3		\n\t"
+	PAVGB(%%mm3, %%mm4, %%mm0, %%mm6)
+	"movq	(%2, %3), %%mm3		\n\t"
+	PAVGB(%%mm3, %%mm5, %%mm1, %%mm6)
+	"movq	%%mm0, (%2)		\n\t"
+	"movq	%%mm1, (%2, %3)		\n\t"
+	"addl	%%eax, %1		\n\t"
+	"addl	%%eax, %2		\n\t"
+
+	"movq	(%1, %3), %%mm1		\n\t"
+	"movq	(%1, %%eax), %%mm0	\n\t"
+	PAVGBP(%%mm1, %%mm2, %%mm4,   %%mm0, %%mm1, %%mm5)
+	"movq	(%2), %%mm3		\n\t"
+	PAVGB(%%mm3, %%mm4, %%mm0, %%mm6)
+	"movq	(%2, %3), %%mm3		\n\t"
+	PAVGB(%%mm3, %%mm5, %%mm1, %%mm6)
+	"movq	%%mm0, (%2)		\n\t"
+	"movq	%%mm1, (%2, %3)		\n\t"
+	"addl	%%eax, %1		\n\t"
+	"addl	%%eax, %2		\n\t"
+
+	"subl	$4, %0			\n\t"
+	"jnz	1b			\n\t"
+	:"+g"(h), "+S"(pixels), "+D"(block)
+	:"r"(line_size)
+	:"eax", "memory");
+}
+
+// this routine is 'slightly' suboptimal but mostly unused
+static void DEF(avg, pixels_xy2)(UINT8 *block, const UINT8 *pixels, int line_size, int h)
+{
+    MOVQ_ZERO(mm7);
+    SET_RND(mm6); // =2 for rnd  and  =1 for no_rnd version
+    __asm __volatile(
+	"movq	(%1), %%mm0		\n\t"
+	"movq	1(%1), %%mm4		\n\t"
+	"movq	%%mm0, %%mm1		\n\t"
+	"movq	%%mm4, %%mm5		\n\t"
+	"punpcklbw %%mm7, %%mm0		\n\t"
+	"punpcklbw %%mm7, %%mm4		\n\t"
+	"punpckhbw %%mm7, %%mm1		\n\t"
+	"punpckhbw %%mm7, %%mm5		\n\t"
+	"paddusw %%mm0, %%mm4		\n\t"
+	"paddusw %%mm1, %%mm5		\n\t"
+	"xorl	%%eax, %%eax		\n\t"
+	"addl	%3, %1			\n\t"
+	".balign 8			\n\t"
+	"1:				\n\t"
+	"movq	(%1, %%eax), %%mm0	\n\t"
+	"movq	1(%1, %%eax), %%mm2	\n\t"
+	"movq	%%mm0, %%mm1		\n\t"
+	"movq	%%mm2, %%mm3		\n\t"
+	"punpcklbw %%mm7, %%mm0		\n\t"
+	"punpcklbw %%mm7, %%mm2		\n\t"
+	"punpckhbw %%mm7, %%mm1		\n\t"
+	"punpckhbw %%mm7, %%mm3		\n\t"
+	"paddusw %%mm2, %%mm0	 	\n\t"
+	"paddusw %%mm3, %%mm1		\n\t"
+	"paddusw %%mm6, %%mm4		\n\t"
+	"paddusw %%mm6, %%mm5		\n\t"
+	"paddusw %%mm0, %%mm4		\n\t"
+	"paddusw %%mm1, %%mm5		\n\t"
+	"psrlw	$2, %%mm4		\n\t"
+	"psrlw	$2, %%mm5		\n\t"
+		"movq	(%2, %%eax), %%mm3	\n\t"
+	"packuswb  %%mm5, %%mm4		\n\t"
+		"pcmpeqd %%mm2, %%mm2	\n\t"
+		"paddb %%mm2, %%mm2	\n\t"
+		PAVGB(%%mm3, %%mm4, %%mm5, %%mm2)
+		"movq	%%mm5, (%2, %%eax)	\n\t"
+	"addl	%3, %%eax		\n\t"
+
+	"movq	(%1, %%eax), %%mm2	\n\t" // 0 <-> 2   1 <-> 3
+	"movq	1(%1, %%eax), %%mm4	\n\t"
+	"movq	%%mm2, %%mm3		\n\t"
+	"movq	%%mm4, %%mm5		\n\t"
+	"punpcklbw %%mm7, %%mm2		\n\t"
+	"punpcklbw %%mm7, %%mm4		\n\t"
+	"punpckhbw %%mm7, %%mm3		\n\t"
+	"punpckhbw %%mm7, %%mm5		\n\t"
+	"paddusw %%mm2, %%mm4	 	\n\t"
+	"paddusw %%mm3, %%mm5		\n\t"
+	"paddusw %%mm6, %%mm0		\n\t"
+	"paddusw %%mm6, %%mm1		\n\t"
+	"paddusw %%mm4, %%mm0		\n\t"
+	"paddusw %%mm5, %%mm1		\n\t"
+	"psrlw	$2, %%mm0		\n\t"
+	"psrlw	$2, %%mm1		\n\t"
+		"movq	(%2, %%eax), %%mm3	\n\t"
+	"packuswb  %%mm1, %%mm0		\n\t"
+		"pcmpeqd %%mm2, %%mm2	\n\t"
+		"paddb %%mm2, %%mm2	\n\t"
+		PAVGB(%%mm3, %%mm0, %%mm1, %%mm2)
+		"movq	%%mm1, (%2, %%eax)	\n\t"
+	"addl	%3, %%eax		\n\t"
+
+	"subl	$2, %0			\n\t"
+	"jnz	1b			\n\t"
+	:"+g"(h), "+S"(pixels)
+	:"D"(block), "r"(line_size)
+	:"eax", "memory");
+}

-- 
Libav/FFmpeg packaging