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+diff -Nur xf86-video-siliconmotion-1.7.4/src/smi_video.c xf86-video-siliconmotion-1.7.4-loongson/src/smi_video.c
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+--- xf86-video-siliconmotion-1.7.4/src/smi_video.c 2010-02-25 08:33:07.000000000 +0100
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++++ xf86-video-siliconmotion-1.7.4-loongson/src/smi_video.c 2012-03-13 04:18:18.634989344 +0100
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+@@ -276,6 +276,7 @@
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+ XVIMAGE_YUY2,
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+ XVIMAGE_YV12,
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+ XVIMAGE_I420,
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++ XVIMAGE_UYVY,
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+ {
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+ FOURCC_RV15, /* id */
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+ XvRGB, /* type */
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+@@ -1464,6 +1465,117 @@
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+ LEAVE();
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+ }
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+
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++static void myXVCopyYUV12ToPacked(const unsigned char *srcy, const unsigned char *srcv, const unsigned char *srcu,
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++ unsigned char *dst, int srcPitchy, int srcPitchuv, int dstPitch, int h, int w)
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++{
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++ int i, j;
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++ unsigned char const *y, *u, *v;
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++ int dstinc, yinc, uinc, vinc;
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++
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++ y = srcy;
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++ u = srcu;
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++ v = srcv;
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++
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++ dstinc = dstPitch - 2*w;
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++ yinc = srcPitchy - w;
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++ uinc = srcPitchuv - w/2;
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++ vinc = srcPitchuv - w/2;
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++
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++ for (i = 0; i < h; i++) {
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++ asm (
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++// ".set arch=loongson2f\n\t"
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++ ".set noreorder\n\t"
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++ "move $8, %8 \n\t"
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++ "1: \n\t"
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++ "beqz $8, 2f \n\t"
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++ "xor $f0, $f0, $f0 \n\t"
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++ "ldc1 $f4, (%0) \n\t"
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++ "punpcklbh $f2, $f4, $f0 \n\t"
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++ "punpckhbh $f4, $f4, $f0 \n\t"
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++ "ldc1 $f16, 8(%0) \n\t"
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++ "punpcklbh $f14, $f16, $f0 \n\t"
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++ "punpckhbh $f16, $f16, $f0 \n\t"
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++
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++ "lwc1 $f8, (%1) \n\t"
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++ "lwc1 $f12, (%2) \n\t"
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++ "punpcklbh $f8, $f8, $f12 \n\t"
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++ "punpcklbh $f6, $f0, $f8 \n\t"
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++ "punpckhbh $f8, $f0, $f8 \n\t"
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++ "lwc1 $f18, 4(%1) \n\t"
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++ "lwc1 $f12, 4(%2) \n\t"
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++ "punpcklbh $f18, $f18, $f12 \n\t"
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++ "punpcklbh $f10, $f0, $f18 \n\t"
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++ "punpckhbh $f12, $f0, $f18 \n\t"
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++
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++ "or $f2, $f2, $f6 \n\t"
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++ "or $f4, $f4, $f8 \n\t"
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++ "or $f14, $f14, $f10 \n\t"
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++ "or $f16, $f16, $f12 \n\t"
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++
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++ "sdc1 $f2, (%3) \n\t"
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++ "sdc1 $f4, 8(%3) \n\t"
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++ "add %0, 16 \n\t"
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++ "add %1, 8 \n\t"
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++ "add %2, 8 \n\t"
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++ "sdc1 $f14, 0x10(%3) \n\t"
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++ "sdc1 $f16, 0x18(%3) \n\t"
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++ "add $8, -1 \n\t"
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++ "b 1b \n\t"
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++ "add %3, 32 \n\t"
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++ "2: \n\t"
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++ ".set reorder\n\t"
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++ : "=r" (y), "=r" (u), "=r" (v), "=r" (dst)
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++ : "0" (y), "1" (u), "2" (v), "3" (dst), "r" (w>>4)
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++ : "memory","$8"
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++ );
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++
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++ asm (
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++// ".set arch=loongson2f\n\t"
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++ ".set noreorder\n\t"
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++ "move $8, %8 \n\t"
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++ "1: \n\t"
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++ "beqz $8, 2f \n\t"
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++ "xor $f0, $f0, $f0 \n\t"
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++ "ldc1 $f4, (%0) \n\t"
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++ "punpcklbh $f2, $f4, $f0 \n\t"
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++ "punpckhbh $f4, $f4, $f0 \n\t"
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++
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++ "lwc1 $f8, (%1) \n\t"
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++ "lwc1 $f12, (%2) \n\t"
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++ "punpcklbh $f8, $f8, $f12 \n\t"
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++ "punpcklbh $f6, $f0, $f8 \n\t"
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++ "punpckhbh $f8, $f0, $f8 \n\t"
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++
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++ "or $f2, $f2, $f6 \n\t"
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++ "or $f4, $f4, $f8 \n\t"
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++
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++ "sdc1 $f2, (%3) \n\t"
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++ "sdc1 $f4, 8(%3) \n\t"
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++ "add %0, 8 \n\t"
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++ "add %1, 4 \n\t"
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++ "add %2, 4 \n\t"
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++ "add $8, -1 \n\t"
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++ "b 1b \n\t"
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++ "add %3, 16 \n\t"
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++ "2:\n\t"
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++ ".set reorder\n\t"
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++ : "=r" (y), "=r" (u), "=r" (v), "=r" (dst)
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++ : "0" (y), "1" (u), "2" (v), "3" (dst), "r" ((w&0xf)/8)
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++ : "memory","$8"
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++ );
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++
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++ for (j = (w&7)/2; j; j--) {
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++ *dst++ = *y++;
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++ *dst++ = *u++;
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++ *dst++ = *y++;
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++ *dst++ = *v++;
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++ }
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++ y += yinc;
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++ u = (i%2) ? (u + uinc): (u - w/2);
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++ v = (i%2) ? (v + vinc): (v - w/2);
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++ dst += dstinc;
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++ }
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++}
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+
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+ static int
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+ SMI_PutImage(
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+@@ -1592,7 +1704,7 @@
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+ offset3 = tmp;
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+ }
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+ nLines = ((((y2 + 0xffff) >> 16) + 1) & ~1) - top;
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+- xf86XVCopyYUV12ToPacked(buf + (top * srcPitch) + (left >> 1),
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++ myXVCopyYUV12ToPacked(buf + (top * srcPitch) + (left >> 1),
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+ buf + offset2, buf + offset3, dstStart,
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+ srcPitch, srcPitch2, dstPitch, nLines,
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+ nPixels);
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