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Altivec can only load naturally aligned vectors. To handle possibly unaligned data a second vector is loaded from an offset of the original location and the data is recovered through a vector permutation. Overreads are minimal if the offset for second load points to the last element of data. This is 7 for loading eight 8-bit pixels and overreads are reduced from 16 bytes to 8 bytes if the pixels are 64-bit aligned. For unaligned pixels the overread is reduced from 23 bytes to 15 bytes in the worst case. |
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| .. | ||
| asm.S | ||
| dsputil_altivec.c | ||
| dsputil_altivec.h | ||
| dsputil_ppc.c | ||
| fdct_altivec.c | ||
| fft_altivec_s.S | ||
| fft_altivec.c | ||
| fmtconvert_altivec.c | ||
| gmc_altivec.c | ||
| h264chroma_init.c | ||
| h264chroma_template.c | ||
| h264dsp.c | ||
| h264qpel_template.c | ||
| h264qpel.c | ||
| hpeldsp_altivec.c | ||
| idct_altivec.c | ||
| int_altivec.c | ||
| Makefile | ||
| mathops.h | ||
| mpegaudiodsp_altivec.c | ||
| mpegvideo_altivec.c | ||
| vc1dsp_altivec.c | ||
| videodsp_ppc.c | ||
| vorbisdsp_altivec.c | ||
| vp3dsp_altivec.c | ||
| vp8dsp_altivec.c | ||