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315 lines
8.1 KiB
C
315 lines
8.1 KiB
C
/*
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dct64_altivec.c: Discrete Cosine Tansform (DCT) for Altivec
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copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Michael Hipp
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altivec optimization by tmkk
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*/
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/*
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* Discrete Cosine Tansform (DCT) for subband synthesis
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*
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* -funroll-loops (for gcc) will remove the loops for better performance
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* using loops in the source-code enhances readabillity
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*
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*
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* TODO: write an optimized version for the down-sampling modes
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* (in these modes the bands 16-31 (2:1) or 8-31 (4:1) are zero
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*/
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#include "mpg123lib_intern.h"
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#ifndef __APPLE__
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#include <altivec.h>
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#endif
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void dct64_altivec(real *out0,real *out1,real *samples)
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{
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ALIGNED(16) real bufs[32];
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{
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register real *b1,*costab;
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vector unsigned char vinvert,vperm1,vperm2,vperm3,vperm4;
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vector float v1,v2,v3,v4,v5,v6,v7,v8;
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vector float vbs1,vbs2,vbs3,vbs4,vbs5,vbs6,vbs7,vbs8;
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vector float vbs9,vbs10,vbs11,vbs12,vbs13,vbs14,vbs15,vbs16;
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vector float vzero;
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b1 = samples;
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costab = pnts[0];
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vzero = vec_xor(vzero,vzero);
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#ifdef __APPLE__
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vinvert = (vector unsigned char)(12,13,14,15,8,9,10,11,4,5,6,7,0,1,2,3);
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#else
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vinvert = (vector unsigned char){12,13,14,15,8,9,10,11,4,5,6,7,0,1,2,3};
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#endif
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vperm1 = vec_lvsl(0,b1);
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vperm2 = vec_perm(vperm1,vperm1,vinvert);
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v1 = vec_ld(0,b1);
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v2 = vec_ld(16,b1);
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v3 = vec_ld(112,b1);
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v4 = vec_ld(127,b1);
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v5 = vec_perm(v1,v2,vperm1); /* b1[0,1,2,3] */
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v6 = vec_perm(v3,v4,vperm2); /* b1[31,30,29,28] */
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vbs1 = vec_add(v5,v6);
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vbs8 = vec_sub(v5,v6);
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v1 = vec_ld(32,b1);
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v4 = vec_ld(96,b1);
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v5 = vec_perm(v2,v1,vperm1); /* b1[4,5,6,7] */
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v6 = vec_perm(v4,v3,vperm2); /* b1[27,26,25,24] */
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vbs2 = vec_add(v5,v6);
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vbs7 = vec_sub(v5,v6);
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v2 = vec_ld(48,b1);
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v3 = vec_ld(80,b1);
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v5 = vec_perm(v1,v2,vperm1); /* b1[8,9,10,11] */
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v6 = vec_perm(v3,v4,vperm2); /* b1[23,22,21,20] */
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vbs3 = vec_add(v5,v6);
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vbs6 = vec_sub(v5,v6);
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v1 = vec_ld(64,b1);
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v5 = vec_perm(v2,v1,vperm1); /* b1[12,13,14,15] */
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v6 = vec_perm(v1,v3,vperm2); /* b1[19,18,17,16] */
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vbs4 = vec_add(v5,v6);
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vbs5 = vec_sub(v5,v6);
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v1 = vec_ld(0,costab);
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vbs8 = vec_madd(vbs8,v1,vzero);
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v2 = vec_ld(16,costab);
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vbs7 = vec_madd(vbs7,v2,vzero);
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v3 = vec_ld(32,costab);
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vbs6 = vec_madd(vbs6,v3,vzero);
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v4 = vec_ld(48,costab);
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vbs5 = vec_madd(vbs5,v4,vzero);
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vbs6 = vec_perm(vbs6,vbs6,vinvert);
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vbs5 = vec_perm(vbs5,vbs5,vinvert);
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costab = pnts[1];
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v1 = vec_perm(vbs4,vbs4,vinvert);
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vbs9 = vec_add(vbs1,v1);
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v3 = vec_sub(vbs1,v1);
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v5 = vec_ld(0,costab);
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v2 = vec_perm(vbs3,vbs3,vinvert);
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vbs10 = vec_add(vbs2,v2);
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v4 = vec_sub(vbs2,v2);
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v6 = vec_ld(16,costab);
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vbs12 = vec_madd(v3,v5,vzero);
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vbs11 = vec_madd(v4,v6,vzero);
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v7 = vec_sub(vbs7,vbs6);
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v8 = vec_sub(vbs8,vbs5);
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vbs13 = vec_add(vbs5,vbs8);
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vbs14 = vec_add(vbs6,vbs7);
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vbs15 = vec_madd(v7,v6,vzero);
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vbs16 = vec_madd(v8,v5,vzero);
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costab = pnts[2];
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v1 = vec_perm(vbs10,vbs10,vinvert);
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v5 = vec_perm(vbs14,vbs14,vinvert);
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vbs1 = vec_add(v1,vbs9);
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vbs5 = vec_add(v5,vbs13);
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v2 = vec_sub(vbs9,v1);
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v6 = vec_sub(vbs13,v5);
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v3 = vec_ld(0,costab);
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vbs11 = vec_perm(vbs11,vbs11,vinvert);
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vbs15 = vec_perm(vbs15,vbs15,vinvert);
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vbs3 = vec_add(vbs11,vbs12);
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vbs7 = vec_add(vbs15,vbs16);
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v4 = vec_sub(vbs12,vbs11);
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v7 = vec_sub(vbs16,vbs15);
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vbs2 = vec_madd(v2,v3,vzero);
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vbs4 = vec_madd(v4,v3,vzero);
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vbs6 = vec_madd(v6,v3,vzero);
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vbs8 = vec_madd(v7,v3,vzero);
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vbs2 = vec_perm(vbs2,vbs2,vinvert);
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vbs4 = vec_perm(vbs4,vbs4,vinvert);
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vbs6 = vec_perm(vbs6,vbs6,vinvert);
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vbs8 = vec_perm(vbs8,vbs8,vinvert);
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costab = pnts[3];
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#ifdef __APPLE__
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vperm1 = (vector unsigned char)(0,1,2,3,4,5,6,7,16,17,18,19,20,21,22,23);
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vperm2 = (vector unsigned char)(12,13,14,15,8,9,10,11,28,29,30,31,24,25,26,27);
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vperm3 = (vector unsigned char)(0,1,2,3,4,5,6,7,20,21,22,23,16,17,18,19);
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#else
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vperm1 = (vector unsigned char){0,1,2,3,4,5,6,7,16,17,18,19,20,21,22,23};
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vperm2 = (vector unsigned char){12,13,14,15,8,9,10,11,28,29,30,31,24,25,26,27};
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vperm3 = (vector unsigned char){0,1,2,3,4,5,6,7,20,21,22,23,16,17,18,19};
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#endif
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vperm4 = vec_add(vperm3,vec_splat_u8(8));
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v1 = vec_ld(0,costab);
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v2 = vec_splat(v1,0);
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v3 = vec_splat(v1,1);
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v1 = vec_mergeh(v2,v3);
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v2 = vec_perm(vbs1,vbs3,vperm1);
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v3 = vec_perm(vbs2,vbs4,vperm1);
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v4 = vec_perm(vbs1,vbs3,vperm2);
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v5 = vec_perm(vbs2,vbs4,vperm2);
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v6 = vec_sub(v2,v4);
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v7 = vec_sub(v3,v5);
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v2 = vec_add(v2,v4);
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v3 = vec_add(v3,v5);
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v4 = vec_madd(v6,v1,vzero);
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v5 = vec_nmsub(v7,v1,vzero);
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vbs9 = vec_perm(v2,v4,vperm3);
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vbs11 = vec_perm(v2,v4,vperm4);
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vbs10 = vec_perm(v3,v5,vperm3);
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vbs12 = vec_perm(v3,v5,vperm4);
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v2 = vec_perm(vbs5,vbs7,vperm1);
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v3 = vec_perm(vbs6,vbs8,vperm1);
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v4 = vec_perm(vbs5,vbs7,vperm2);
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v5 = vec_perm(vbs6,vbs8,vperm2);
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v6 = vec_sub(v2,v4);
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v7 = vec_sub(v3,v5);
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v2 = vec_add(v2,v4);
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v3 = vec_add(v3,v5);
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v4 = vec_madd(v6,v1,vzero);
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v5 = vec_nmsub(v7,v1,vzero);
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vbs13 = vec_perm(v2,v4,vperm3);
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vbs15 = vec_perm(v2,v4,vperm4);
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vbs14 = vec_perm(v3,v5,vperm3);
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vbs16 = vec_perm(v3,v5,vperm4);
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costab = pnts[4];
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v1 = vec_lde(0,costab);
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#ifdef __APPLE__
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v2 = (vector float)(1.0f,-1.0f,1.0f,-1.0f);
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#else
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v2 = (vector float){1.0f,-1.0f,1.0f,-1.0f};
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#endif
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v3 = vec_splat(v1,0);
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v1 = vec_madd(v2,v3,vzero);
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v2 = vec_mergeh(vbs9,vbs10);
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v3 = vec_mergel(vbs9,vbs10);
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v4 = vec_mergeh(vbs11,vbs12);
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v5 = vec_mergel(vbs11,vbs12);
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v6 = vec_mergeh(v2,v3);
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v7 = vec_mergel(v2,v3);
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v2 = vec_mergeh(v4,v5);
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v3 = vec_mergel(v4,v5);
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v4 = vec_sub(v6,v7);
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v5 = vec_sub(v2,v3);
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v6 = vec_add(v6,v7);
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v7 = vec_add(v2,v3);
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v2 = vec_madd(v4,v1,vzero);
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v3 = vec_madd(v5,v1,vzero);
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vbs1 = vec_mergeh(v6,v2);
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vbs2 = vec_mergel(v6,v2);
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vbs3 = vec_mergeh(v7,v3);
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vbs4 = vec_mergel(v7,v3);
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v2 = vec_mergeh(vbs13,vbs14);
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v3 = vec_mergel(vbs13,vbs14);
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v4 = vec_mergeh(vbs15,vbs16);
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v5 = vec_mergel(vbs15,vbs16);
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v6 = vec_mergeh(v2,v3);
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v7 = vec_mergel(v2,v3);
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v2 = vec_mergeh(v4,v5);
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v3 = vec_mergel(v4,v5);
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v4 = vec_sub(v6,v7);
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v5 = vec_sub(v2,v3);
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v6 = vec_add(v6,v7);
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v7 = vec_add(v2,v3);
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v2 = vec_madd(v4,v1,vzero);
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v3 = vec_madd(v5,v1,vzero);
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vbs5 = vec_mergeh(v6,v2);
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vbs6 = vec_mergel(v6,v2);
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vbs7 = vec_mergeh(v7,v3);
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vbs8 = vec_mergel(v7,v3);
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vec_st(vbs1,0,bufs);
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vec_st(vbs2,16,bufs);
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vec_st(vbs3,32,bufs);
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vec_st(vbs4,48,bufs);
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vec_st(vbs5,64,bufs);
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vec_st(vbs6,80,bufs);
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vec_st(vbs7,96,bufs);
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vec_st(vbs8,112,bufs);
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}
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{
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register real *b1;
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register int i;
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for(b1=bufs,i=8;i;i--,b1+=4)
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b1[2] += b1[3];
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for(b1=bufs,i=4;i;i--,b1+=8)
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{
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b1[4] += b1[6];
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b1[6] += b1[5];
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b1[5] += b1[7];
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}
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for(b1=bufs,i=2;i;i--,b1+=16)
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{
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b1[8] += b1[12];
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b1[12] += b1[10];
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b1[10] += b1[14];
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b1[14] += b1[9];
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b1[9] += b1[13];
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b1[13] += b1[11];
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b1[11] += b1[15];
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}
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}
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out0[0x10*16] = bufs[0];
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out0[0x10*15] = bufs[16+0] + bufs[16+8];
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out0[0x10*14] = bufs[8];
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out0[0x10*13] = bufs[16+8] + bufs[16+4];
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out0[0x10*12] = bufs[4];
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out0[0x10*11] = bufs[16+4] + bufs[16+12];
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out0[0x10*10] = bufs[12];
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out0[0x10* 9] = bufs[16+12] + bufs[16+2];
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out0[0x10* 8] = bufs[2];
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out0[0x10* 7] = bufs[16+2] + bufs[16+10];
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out0[0x10* 6] = bufs[10];
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out0[0x10* 5] = bufs[16+10] + bufs[16+6];
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out0[0x10* 4] = bufs[6];
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out0[0x10* 3] = bufs[16+6] + bufs[16+14];
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out0[0x10* 2] = bufs[14];
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out0[0x10* 1] = bufs[16+14] + bufs[16+1];
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out0[0x10* 0] = bufs[1];
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out1[0x10* 0] = bufs[1];
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out1[0x10* 1] = bufs[16+1] + bufs[16+9];
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out1[0x10* 2] = bufs[9];
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out1[0x10* 3] = bufs[16+9] + bufs[16+5];
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out1[0x10* 4] = bufs[5];
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out1[0x10* 5] = bufs[16+5] + bufs[16+13];
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out1[0x10* 6] = bufs[13];
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out1[0x10* 7] = bufs[16+13] + bufs[16+3];
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out1[0x10* 8] = bufs[3];
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out1[0x10* 9] = bufs[16+3] + bufs[16+11];
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out1[0x10*10] = bufs[11];
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out1[0x10*11] = bufs[16+11] + bufs[16+7];
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out1[0x10*12] = bufs[7];
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out1[0x10*13] = bufs[16+7] + bufs[16+15];
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out1[0x10*14] = bufs[15];
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out1[0x10*15] = bufs[16+15];
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}
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