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/* { dg-do compile } */
#include <altivec.h>
inline void
transpose_vmx (vector signed short *input, vector signed short *output)
{
vector signed short v0, v1, v2, v3, v4, v5, v6, v7;
vector signed short x0, x1, x2, x3, x4, x5, x6, x7;
/* Matrix transpose */
v0 = vec_mergeh (input[0], input[4]);
v1 = vec_mergel (input[0], input[4]);
v2 = vec_mergeh (input[1], input[5]);
v3 = vec_mergel (input[1], input[5]);
v4 = vec_mergeh (input[2], input[6]);
v5 = vec_mergel (input[2], input[6]);
v6 = vec_mergeh (input[3], input[7]);
v7 = vec_mergel (input[3], input[7]);
x0 = vec_mergeh (v0, v4);
x1 = vec_mergel (v0, v4);
x2 = vec_mergeh (v1, v5);
x3 = vec_mergel (v1, v5);
x4 = vec_mergeh (v2, v6);
x5 = vec_mergel (v2, v6);
x6 = vec_mergeh (v3, v7);
x7 = vec_mergel (v3, v7);
output[0] = vec_mergeh (x0, x4);
output[1] = vec_mergel (x0, x4);
output[2] = vec_mergeh (x1, x5);
output[3] = vec_mergel (x1, x5);
output[4] = vec_mergeh (x2, x6);
output[5] = vec_mergel (x2, x6);
output[6] = vec_mergeh (x3, x7);
output[7] = vec_mergel (x3, x7);
}
void
dct_vmx (vector signed short *input, vector signed short *output,
vector signed short *postscale)
{
vector signed short mul0, mul1, mul2, mul3, mul4, mul5, mul6, mul;
vector signed short v0, v1, v2, v3, v4, v5, v6, v7, v8, v9;
vector signed short v20, v21, v22, v23, v24, v25, v26, v27, v31;
int i;
vector signed short in[8], out[8];
/* Load first eight rows of input data */
/* Load multiplication constants */
/* Splat multiplication constants */
mul0 = vec_splat(input[8],0);
mul1 = vec_splat(input[8],1);
mul2 = vec_splat(input[8],2);
mul3 = vec_splat(input[8],3);
mul4 = vec_splat(input[8],4);
mul5 = vec_splat(input[8],5);
mul6 = vec_splat(input[8],6);
/* Perform DCT on the eight columns */
/*********** Stage 1 ***********/
v8 = vec_adds (input[0], input[7]);
v9 = vec_subs (input[0], input[7]);
v0 = vec_adds (input[1], input[6]);
v7 = vec_subs (input[1], input[6]);
v1 = vec_adds (input[2], input[5]);
v6 = vec_subs (input[2], input[5]);
v2 = vec_adds (input[3], input[4]);
v5 = vec_subs (input[3], input[4]);
/*********** Stage 2 ***********/
/* Top */
v3 = vec_adds (v8, v2); /* (V0+V7) + (V3+V4) */
v4 = vec_subs (v8, v2); /* (V0+V7) - (V3+V4) */
v2 = vec_adds (v0, v1); /* (V1+V6) + (V2+V5) */
v8 = vec_subs (v0, v1); /* (V1+V6) - (V2+V5) */
/* Bottom */
v0 = vec_subs (v7, v6); /* (V1-V6) - (V2-V5) */
v1 = vec_adds (v7, v6); /* (V1-V6) + (V2-V5) */
/*********** Stage 3 ***********/
/* Top */
in[0] = vec_adds (v3, v2); /* y0 = v3 + v2 */
in[4] = vec_subs (v3, v2); /* y4 = v3 - v2 */
in[2] = vec_mradds (v8, mul2, v4); /* y2 = v8 * a0 + v4 */
v6 = vec_mradds (v4, mul2, mul6);
in[6] = vec_subs (v6, v8); /* y6 = v4 * a0 - v8 */
/* Bottom */
v6 = vec_mradds (v0, mul0, v5); /* v6 = v0 * (c4) + v5 */
v7 = vec_mradds (v0, mul4, v5); /* v7 = v0 * (-c4) + v5 */
v2 = vec_mradds (v1, mul4, v9); /* v2 = v1 * (-c4) + v9 */
v3 = vec_mradds (v1, mul0, v9); /* v3 = v1 * (c4) + v9 */
/*********** Stage 4 ***********/
/* Bottom */
in[1] = vec_mradds (v6, mul3, v3); /* y1 = v6 * (a1) + v3 */
v23 = vec_mradds (v3, mul3, mul6);
in[7] = vec_subs (v23, v6); /* y7 = v3 * (a1) - v6 */
in[5] = vec_mradds (v2, mul1, v7); /* y5 = v2 * (a2) + v7 */
in[3] = vec_mradds (v7, mul5, v2); /* y3 = v7 * (-a2) + v2 */
transpose_vmx (in, out);
/* Perform DCT on the eight rows */
/*********** Stage 1 ***********/
v8 = vec_adds (out[0], out[7]);
v9 = vec_subs (out[0], out[7]);
v0 = vec_adds (out[1], out[6]);
v7 = vec_subs (out[1], out[6]);
v1 = vec_adds (out[2], out[5]);
v6 = vec_subs (out[2], out[5]);
v2 = vec_adds (out[3], out[4]);
v5 = vec_subs (out[3], out[4]);
/*********** Stage 2 ***********/
/* Top */
v3 = vec_adds (v8, v2); /* (V0+V7) + (V3+V4) */
v4 = vec_subs (v8, v2); /* (V0+V7) - (V3+V4) */
v2 = vec_adds (v0, v1); /* (V1+V6) + (V2+V5) */
v8 = vec_subs (v0, v1); /* (V1+V6) - (V2+V5) */
/* Bottom */
v0 = vec_subs (v7, v6); /* (V1-V6) - (V2-V5) */
v1 = vec_adds (v7, v6); /* (V1-V6) + (V2-V5) */
/*********** Stage 3 ***********/
/* Top */
v25 = vec_subs (v25, v25); /* reinit v25 = 0 */
v20 = vec_adds (v3, v2); /* y0 = v3 + v2 */
v24 = vec_subs (v3, v2); /* y4 = v3 - v2 */
v22 = vec_mradds (v8, mul2, v4); /* y2 = v8 * a0 + v4 */
v6 = vec_mradds (v4, mul2, v25);
v26 = vec_subs (v6, v8); /* y6 = v4 * a0 - v8 */
/* Bottom */
v6 = vec_mradds (v0, mul0, v5); /* v6 = v0 * (c4) + v5 */
v7 = vec_mradds (v0, mul4, v5); /* v7 = v0 * (-c4) + v5 */
v2 = vec_mradds (v1, mul4, v9); /* v2 = v1 * (-c4) + v9 */
v3 = vec_mradds (v1, mul0, v9); /* v3 = v1 * (c4) + v9 */
/*********** Stage 4 ***********/
/* Bottom */
v21 = vec_mradds (v6, mul3, v3); /* y1 = v6 * (a1) + v3 */
v23 = vec_mradds (v3, mul3, v25);
v27 = vec_subs (v23, v6); /* y7 = v3 * (a1) - v6 */
v25 = vec_mradds (v2, mul1, v7); /* y5 = v2 * (a2) + v7 */
v23 = vec_mradds (v7, mul5, v2); /* y3 = v7 * (-a2) + v2 */
/* Post-scale and store reults */
v31 = vec_subs (v31, v31); /* reinit v25 = 0 */
output[0] = vec_mradds (postscale[0], v20, v31);
output[2] = vec_mradds (postscale[2], v22, v31);
output[4] = vec_mradds (postscale[4], v24, v31);
output[6] = vec_mradds (postscale[6], v26, v31);
output[1] = vec_mradds (postscale[1], v21, v31);
output[3] = vec_mradds (postscale[3], v23, v31);
output[5] = vec_mradds (postscale[5], v25, v31);
output[7] = vec_mradds (postscale[7], v27, v31);
}
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