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void avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h);
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// used to build registers permutation vectors (vcprm)
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// the 's' are for words in the _s_econd vector
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#define WORD_0 0x00,0x01,0x02,0x03
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#define WORD_1 0x04,0x05,0x06,0x07
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#define WORD_2 0x08,0x09,0x0a,0x0b
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#define WORD_3 0x0c,0x0d,0x0e,0x0f
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#define WORD_s0 0x10,0x11,0x12,0x13
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#define WORD_s1 0x14,0x15,0x16,0x17
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#define WORD_s2 0x18,0x19,0x1a,0x1b
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#define WORD_s3 0x1c,0x1d,0x1e,0x1f
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#define vcprm(a,b,c,d) (const vector unsigned char)(WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d)
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#define vcprm(a,b,c,d) (const vector unsigned char){WORD_ ## a, WORD_ ## b, WORD_ ## c, WORD_ ## d}
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// vcprmle is used to keep the same index as in the SSE version.
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// it's the same as vcprm, with the index inversed
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// ('le' is Little Endian)
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#define vcprmle(a,b,c,d) vcprm(d,c,b,a)
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// used to build inverse/identity vectors (vcii)
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// n is _n_egative, p is _p_ositive
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#define vcii(a,b,c,d) (const vector float)(FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d)
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#define vcii(a,b,c,d) (const vector float){FLOAT_ ## a, FLOAT_ ## b, FLOAT_ ## c, FLOAT_ ## d}
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// Transpose 8x8 matrix of 16-bit elements (in-place)
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#define TRANSPOSE8(a,b,c,d,e,f,g,h) \
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vector signed short A1, B1, C1, D1, E1, F1, G1, H1; \
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vector signed short A2, B2, C2, D2, E2, F2, G2, H2; \
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A1 = vec_mergeh (a, e); \
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B1 = vec_mergel (a, e); \
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C1 = vec_mergeh (b, f); \
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D1 = vec_mergel (b, f); \
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E1 = vec_mergeh (c, g); \
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F1 = vec_mergel (c, g); \
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G1 = vec_mergeh (d, h); \
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H1 = vec_mergel (d, h); \
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A2 = vec_mergeh (A1, E1); \
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B2 = vec_mergel (A1, E1); \
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C2 = vec_mergeh (B1, F1); \
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D2 = vec_mergel (B1, F1); \
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E2 = vec_mergeh (C1, G1); \
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F2 = vec_mergel (C1, G1); \
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G2 = vec_mergeh (D1, H1); \
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H2 = vec_mergel (D1, H1); \
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a = vec_mergeh (A2, E2); \
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b = vec_mergel (A2, E2); \
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c = vec_mergeh (B2, F2); \
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d = vec_mergel (B2, F2); \
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e = vec_mergeh (C2, G2); \
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f = vec_mergel (C2, G2); \
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g = vec_mergeh (D2, H2); \
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h = vec_mergel (D2, H2); \
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#endif /* HAVE_ALTIVEC */
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#endif /* _DSPUTIL_ALTIVEC_ */
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#endif /* FFMPEG_DSPUTIL_ALTIVEC_H */