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view decoders/libmpg123/decode_altivec.c @ 562:7e08477b0fc1

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MP3 decoder upgrade work. Ripped out SMPEG and mpglib support, replaced it with "mpg123.c" and libmpg123. libmpg123 is a much better version of mpglib, so it should solve all the problems about MP3's not seeking, or most modern MP3's not playing at all, etc. Since you no longer have to make a tradeoff with SMPEG for features, and SMPEG is basically rotting, I removed it from the project. There is still work to be done with libmpg123...there are MMX, 3DNow, SSE, Altivec, etc decoders which we don't have enabled at the moment, and the build system could use some work to make this compile more cleanly, etc. Still: huge win.
author Ryan C. Gordon <icculus@icculus.org>
date Fri, 30 Jan 2009 02:44:47 -0500
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/*
	decode.c: decoding samples...

	copyright 1995-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
	see COPYING and AUTHORS files in distribution or http://mpg123.org
	initially written by Michael Hipp
	altivec optimization by tmkk
*/

#include "mpg123lib_intern.h"

#ifndef __APPLE__
#include <altivec.h>
#endif

#define WRITE_SAMPLE(samples,sum,clip) \
  if( (sum) > REAL_PLUS_32767) { *(samples) = 0x7fff; (clip)++; } \
  else if( (sum) < REAL_MINUS_32768) { *(samples) = -0x8000; (clip)++; } \
  else { *(samples) = REAL_TO_SHORT(sum); }

int synth_1to1_8bit_altivec(real *bandPtr,int channel, mpg123_handle *fr, int final)
{
  short samples_tmp[64];
  short *tmp1 = samples_tmp + channel;
  int i,ret;

  unsigned char *samples = fr->buffer.data;
  int pnt = fr->buffer.fill;
  fr->buffer.data = (unsigned char*) samples_tmp;
  fr->buffer.fill = 0;
  ret = synth_1to1_altivec(bandPtr, channel, fr, 0);
  fr->buffer.data = samples;

  samples += channel + pnt;
  for(i=0;i<32;i++) {
    *samples = fr->conv16to8[*tmp1>>AUSHIFT];
    samples += 2;
    tmp1 += 2;
  }
  fr->buffer.fill = pnt + (final ? 64 : 0 );

  return ret;
}

int synth_1to1_8bit_mono_altivec(real *bandPtr, mpg123_handle *fr)
{
  sample_t samples_tmp[64];
  sample_t *tmp1 = samples_tmp;
  int i,ret;

  /* save buffer stuff, trick samples_tmp into there, decode, restore */
  unsigned char *samples = fr->buffer.data;
  int pnt = fr->buffer.fill;
  fr->buffer.data = (unsigned char*) samples_tmp;
  fr->buffer.fill = 0;
  ret = synth_1to1_altivec(bandPtr,0, fr, 0);
  fr->buffer.data = samples; /* restore original value */

  samples += pnt;
  for(i=0;i<32;i++) {
#ifdef FLOATOUT
    *samples++ = 0;
#else
    *samples++ = fr->conv16to8[*tmp1>>AUSHIFT];
#endif
    tmp1 += 2;
  }
  fr->buffer.fill = pnt + 32;
  
  return ret;
}

int synth_1to1_8bit_mono2stereo_altivec(real *bandPtr, mpg123_handle *fr)
{
  sample_t samples_tmp[64];
  sample_t *tmp1 = samples_tmp;
  int i,ret;

  /* save buffer stuff, trick samples_tmp into there, decode, restore */
  unsigned char *samples = fr->buffer.data;
  int pnt = fr->buffer.fill;
  fr->buffer.data = (unsigned char*) samples_tmp;
  fr->buffer.fill = 0;
  ret = synth_1to1_altivec(bandPtr, 0, fr, 0);
  fr->buffer.data = samples; /* restore original value */

  samples += pnt;
  for(i=0;i<32;i++) {
#ifdef FLOATOUT
    *samples++ = 0;
    *samples++ = 0;
#else
    *samples++ = fr->conv16to8[*tmp1>>AUSHIFT];
    *samples++ = fr->conv16to8[*tmp1>>AUSHIFT];
#endif
    tmp1 += 2;
  }
  fr->buffer.fill = pnt + 64;

  return ret;
}

int synth_1to1_mono_altivec(real *bandPtr, mpg123_handle *fr)
{
  sample_t samples_tmp[64];
  sample_t *tmp1 = samples_tmp;
  int i,ret;

  /* save buffer stuff, trick samples_tmp into there, decode, restore */
  unsigned char *samples = fr->buffer.data;
  int pnt = fr->buffer.fill;
  fr->buffer.data = (unsigned char*) samples_tmp;
  fr->buffer.fill = 0;
  ret = synth_1to1_altivec(bandPtr, 0, fr, 0); /* decode into samples_tmp */
  fr->buffer.data = samples; /* restore original value */

  /* now append samples from samples_tmp */
  samples += pnt; /* just the next mem in frame buffer */
  for(i=0;i<32;i++){
    *( (sample_t *)samples) = *tmp1;
    samples += sizeof(sample_t);
    tmp1 += 2;
  }
  fr->buffer.fill = pnt + 32*sizeof(sample_t);

  return ret;
}


int synth_1to1_mono2stereo_altivec(real *bandPtr, mpg123_handle *fr)
{
  int i,ret;
  unsigned char *samples = fr->buffer.data;

  ret = synth_1to1_altivec(bandPtr,0,fr,1);
  samples += fr->buffer.fill - 64*sizeof(sample_t);

  for(i=0;i<32;i++) {
    ((sample_t *)samples)[1] = ((sample_t *)samples)[0];
    samples+=2*sizeof(sample_t);
  }

  return ret;
}


int synth_1to1_altivec(real *bandPtr,int channel,mpg123_handle *fr, int final)
{
  static const int step = 2;
  sample_t *samples = (sample_t *) (fr->buffer.data+fr->buffer.fill);

  real *b0, **buf;
  int clip = 0; 
  int bo1;

  if(fr->have_eq_settings) do_equalizer(bandPtr,channel,fr->equalizer);

  if(!channel) {
    fr->bo[0]--;
    fr->bo[0] &= 0xf;
    buf = fr->real_buffs[0];
  }
  else {
    samples++;
    buf = fr->real_buffs[1];
  }

  if(fr->bo[0] & 0x1) {
    b0 = buf[0];
    bo1 = fr->bo[0];
    dct64_altivec(buf[1]+((fr->bo[0]+1)&0xf),buf[0]+fr->bo[0],bandPtr);
  }
  else {
    b0 = buf[1];
    bo1 = fr->bo[0]+1;
    dct64_altivec(buf[0]+fr->bo[0],buf[1]+fr->bo[0]+1,bandPtr);
  }


  {
    register int j;
    real *window = opt_decwin(fr) + 16 - bo1;
		
		ALIGNED(16) int clip_tmp[4];
		vector float v1,v2,v3,v4,v5,v6,v7,v8,v9;
		vector unsigned char vperm1,vperm2,vperm3,vperm4,vperm5;
		vector float vsum,vsum2,vsum3,vsum4,vmin,vmax;
		vector signed int vclip;
		vector signed short vsample1,vsample2;
		vclip = vec_xor(vclip,vclip);
#ifdef __APPLE__
		vmax = (vector float)(32767.0f);
		vmin = (vector float)(-32768.0f);
		vperm5 = (vector unsigned char)(0,1,18,19,2,3,22,23,4,5,26,27,6,7,30,31);
#else
		vmax = (vector float){32767.0f,32767.0f,32767.0f,32767.0f};
		vmin = (vector float){-32768.0f,-32768.0f,-32768.0f,-32768.0f};
		vperm5 = (vector unsigned char){0,1,18,19,2,3,22,23,4,5,26,27,6,7,30,31};
#endif
		
		vperm1 = vec_lvsl(0,window);
		vperm3 = vec_lvsl(0,samples);
		vperm4 = vec_lvsr(0,samples);
		for (j=4;j;j--)
		{
			vsum = vec_xor(vsum,vsum);
			vsum2 = vec_xor(vsum2,vsum2);
			vsum3 = vec_xor(vsum3,vsum3);
			vsum4 = vec_xor(vsum4,vsum4);
			v1 = vec_ld(0,window);
			v2 = vec_ld(16,window);
			v3 = vec_ld(32,window);
			v4 = vec_ld(48,window);
			v5 = vec_ld(64,window);
			v1 = vec_perm(v1,v2,vperm1);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v2,v3,vperm1);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v3,v4,vperm1);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v4,v5,vperm1);
			v9 = vec_ld(48,b0);
			
			vsum = vec_madd(v1,v6,vsum);
			vsum = vec_madd(v2,v7,vsum);
			vsum = vec_madd(v3,v8,vsum);
			vsum = vec_madd(v4,v9,vsum);
			
			window += 32;
			b0 += 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(16,window);
			v3 = vec_ld(32,window);
			v4 = vec_ld(48,window);
			v5 = vec_ld(64,window);
			v1 = vec_perm(v1,v2,vperm1);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v2,v3,vperm1);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v3,v4,vperm1);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v4,v5,vperm1);
			v9 = vec_ld(48,b0);
			
			vsum2 = vec_madd(v1,v6,vsum2);
			vsum2 = vec_madd(v2,v7,vsum2);
			vsum2 = vec_madd(v3,v8,vsum2);
			vsum2 = vec_madd(v4,v9,vsum2);
			
			window += 32;
			b0 += 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(16,window);
			v3 = vec_ld(32,window);
			v4 = vec_ld(48,window);
			v5 = vec_ld(64,window);
			v1 = vec_perm(v1,v2,vperm1);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v2,v3,vperm1);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v3,v4,vperm1);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v4,v5,vperm1);
			v9 = vec_ld(48,b0);
			
			vsum3 = vec_madd(v1,v6,vsum3);
			vsum3 = vec_madd(v2,v7,vsum3);
			vsum3 = vec_madd(v3,v8,vsum3);
			vsum3 = vec_madd(v4,v9,vsum3);
			
			window += 32;
			b0 += 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(16,window);
			v3 = vec_ld(32,window);
			v4 = vec_ld(48,window);
			v5 = vec_ld(64,window);
			v1 = vec_perm(v1,v2,vperm1);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v2,v3,vperm1);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v3,v4,vperm1);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v4,v5,vperm1);
			v9 = vec_ld(48,b0);
			
			vsum4 = vec_madd(v1,v6,vsum4);
			vsum4 = vec_madd(v2,v7,vsum4);
			vsum4 = vec_madd(v3,v8,vsum4);
			vsum4 = vec_madd(v4,v9,vsum4);
			
			window += 32;
			b0 += 16;
			
			v1 = vec_mergeh(vsum,vsum3);
			v2 = vec_mergeh(vsum2,vsum4);
			v3 = vec_mergel(vsum,vsum3);
			v4 = vec_mergel(vsum2,vsum4);
			v5 = vec_mergeh(v1,v2);
			v6 = vec_mergel(v1,v2);
			v7 = vec_mergeh(v3,v4);
			v8 = vec_mergel(v3,v4);
			
			vsum = vec_sub(v5,v6);
			v9 = vec_sub(v7,v8);
			vsum = vec_add(vsum,v9);
			
			v3 = (vector float)vec_cts(vsum,0);
			v1 = (vector float)vec_cmpgt(vsum,vmax);
			v2 = (vector float)vec_cmplt(vsum,vmin);
			vsample1 = vec_ld(0,samples);
			vsample2 = vec_ld(15,samples);
			v3 = (vector float)vec_packs((vector signed int)v3,(vector signed int)v3);
			v4 = (vector float)vec_perm(vsample1,vsample2,vperm3);
			v5 = (vector float)vec_perm(v3,v4,vperm5);
			v6 = (vector float)vec_perm(vsample2,vsample1,vperm3);
			v7 = (vector float)vec_perm(v5,v6,vperm4);
			v8 = (vector float)vec_perm(v6,v5,vperm4);
			vec_st((vector signed short)v7,15,samples);
			vec_st((vector signed short)v8,0,samples);
			samples += 8;
#ifdef __APPLE__
			v1 = (vector float)vec_sr((vector unsigned int)v1,(vector unsigned int)(31));
			v2 = (vector float)vec_sr((vector unsigned int)v2,(vector unsigned int)(31));
#else
			v1 = (vector float)vec_sr((vector unsigned int)v1,(vector unsigned int){31,31,31,31});
			v2 = (vector float)vec_sr((vector unsigned int)v2,(vector unsigned int){31,31,31,31});
#endif
			v5 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
			vclip = vec_sums((vector signed int)v5,vclip);
		}
		
		{
			real sum;
			sum  = REAL_MUL(window[0x0], b0[0x0]);
			sum += REAL_MUL(window[0x2], b0[0x2]);
			sum += REAL_MUL(window[0x4], b0[0x4]);
			sum += REAL_MUL(window[0x6], b0[0x6]);
			sum += REAL_MUL(window[0x8], b0[0x8]);
			sum += REAL_MUL(window[0xA], b0[0xA]);
			sum += REAL_MUL(window[0xC], b0[0xC]);
			sum += REAL_MUL(window[0xE], b0[0xE]);
			WRITE_SAMPLE(samples,sum,clip);
			b0-=0x10,window-=0x20,samples+=step;
		}
		window += bo1<<1;
		
		vperm1 = vec_lvsl(0,window);
#ifdef __APPLE__
		vperm2 = vec_perm(vperm1,vperm1,(vector unsigned char)(12,13,14,15,8,9,10,11,4,5,6,7,0,1,2,3));
#else
		vperm2 = vec_perm(vperm1,vperm1,(vector unsigned char){12,13,14,15,8,9,10,11,4,5,6,7,0,1,2,3});
#endif
		vperm3 = vec_lvsl(0,samples);
		vperm4 = vec_lvsr(0,samples);
		for (j=3;j;j--)
		{
			vsum = vec_xor(vsum,vsum);
			vsum2 = vec_xor(vsum2,vsum2);
			vsum3 = vec_xor(vsum3,vsum3);
			vsum4 = vec_xor(vsum4,vsum4);
			v1 = vec_ld(-1,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum = vec_nmsub(v1,v6,vsum);
			vsum = vec_nmsub(v2,v7,vsum);
			vsum = vec_nmsub(v3,v8,vsum);
			vsum = vec_nmsub(v4,v9,vsum);
			
			window -= 32;
			b0 -= 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum2 = vec_nmsub(v1,v6,vsum2);
			vsum2 = vec_nmsub(v2,v7,vsum2);
			vsum2 = vec_nmsub(v3,v8,vsum2);
			vsum2 = vec_nmsub(v4,v9,vsum2);
			
			window -= 32;
			b0 -= 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum3 = vec_nmsub(v1,v6,vsum3);
			vsum3 = vec_nmsub(v2,v7,vsum3);
			vsum3 = vec_nmsub(v3,v8,vsum3);
			vsum3 = vec_nmsub(v4,v9,vsum3);
			
			window -= 32;
			b0 -= 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum4 = vec_nmsub(v1,v6,vsum4);
			vsum4 = vec_nmsub(v2,v7,vsum4);
			vsum4 = vec_nmsub(v3,v8,vsum4);
			vsum4 = vec_nmsub(v4,v9,vsum4);
			
			window -= 32;
			b0 -= 16;
			
			v1 = vec_mergeh(vsum,vsum3);
			v2 = vec_mergeh(vsum2,vsum4);
			v3 = vec_mergel(vsum,vsum3);
			v4 = vec_mergel(vsum2,vsum4);
			v5 = vec_mergeh(v1,v2);
			v6 = vec_mergel(v1,v2);
			v7 = vec_mergeh(v3,v4);
			v8 = vec_mergel(v3,v4);
			
			vsum = vec_add(v5,v6);
			v9 = vec_add(v7,v8);
			vsum = vec_add(vsum,v9);
			
			v3 = (vector float)vec_cts(vsum,0);
			v1 = (vector float)vec_cmpgt(vsum,vmax);
			v2 = (vector float)vec_cmplt(vsum,vmin);
			vsample1 = vec_ld(0,samples);
			vsample2 = vec_ld(15,samples);
			v3 = (vector float)vec_packs((vector signed int)v3,(vector signed int)v3);
			v4 = (vector float)vec_perm(vsample1,vsample2,vperm3);
			v5 = (vector float)vec_perm(v3,v4,vperm5);
			v6 = (vector float)vec_perm(vsample2,vsample1,vperm3);
			v7 = (vector float)vec_perm(v5,v6,vperm4);
			v8 = (vector float)vec_perm(v6,v5,vperm4);
			vec_st((vector signed short)v7,15,samples);
			vec_st((vector signed short)v8,0,samples);
			samples += 8;
#ifdef __APPLE__
			v1 = (vector float)vec_sr((vector unsigned int)v1,(vector unsigned int)(31));
			v2 = (vector float)vec_sr((vector unsigned int)v2,(vector unsigned int)(31));
#else
			v1 = (vector float)vec_sr((vector unsigned int)v1,(vector unsigned int){31,31,31,31});
			v2 = (vector float)vec_sr((vector unsigned int)v2,(vector unsigned int){31,31,31,31});
#endif
			v5 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
			vclip = vec_sums((vector signed int)v5,vclip);
		}
#ifdef __APPLE__
		vperm5 = (vector unsigned char)(0,1,18,19,2,3,22,23,4,5,26,27,28,29,30,31);
#else
		vperm5 = (vector unsigned char){0,1,18,19,2,3,22,23,4,5,26,27,28,29,30,31};
#endif
		{
			vsum = vec_xor(vsum,vsum);
			vsum2 = vec_xor(vsum2,vsum2);
			vsum3 = vec_xor(vsum3,vsum3);
			vsum4 = vec_xor(vsum4,vsum4);
			v1 = vec_ld(-1,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum = vec_nmsub(v1,v6,vsum);
			vsum = vec_nmsub(v2,v7,vsum);
			vsum = vec_nmsub(v3,v8,vsum);
			vsum = vec_nmsub(v4,v9,vsum);
			
			window -= 32;
			b0 -= 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum2 = vec_nmsub(v1,v6,vsum2);
			vsum2 = vec_nmsub(v2,v7,vsum2);
			vsum2 = vec_nmsub(v3,v8,vsum2);
			vsum2 = vec_nmsub(v4,v9,vsum2);
			
			window -= 32;
			b0 -= 16;
			
			v1 = vec_ld(0,window);
			v2 = vec_ld(-16,window);
			v3 = vec_ld(-32,window);
			v4 = vec_ld(-48,window);
			v5 = vec_ld(-64,window);
			v1 = vec_perm(v2,v1,vperm2);
			v6 = vec_ld(0,b0);
			v2 = vec_perm(v3,v2,vperm2);
			v7 = vec_ld(16,b0);
			v3 = vec_perm(v4,v3,vperm2);
			v8 = vec_ld(32,b0);
			v4 = vec_perm(v5,v4,vperm2);
			v9 = vec_ld(48,b0);
			
			vsum3 = vec_nmsub(v1,v6,vsum3);
			vsum3 = vec_nmsub(v2,v7,vsum3);
			vsum3 = vec_nmsub(v3,v8,vsum3);
			vsum3 = vec_nmsub(v4,v9,vsum3);
			
			v1 = vec_mergeh(vsum,vsum3);
			v2 = vec_mergeh(vsum2,vsum2);
			v3 = vec_mergel(vsum,vsum3);
			v4 = vec_mergel(vsum2,vsum2);
			v5 = vec_mergeh(v1,v2);
			v6 = vec_mergel(v1,v2);
			v7 = vec_mergeh(v3,v4);
			v8 = vec_mergel(v3,v4);
			
			vsum = vec_add(v5,v6);
			v9 = vec_add(v7,v8);
			vsum = vec_add(vsum,v9);
			
			v3 = (vector float)vec_cts(vsum,0);
			v1 = (vector float)vec_cmpgt(vsum,vmax);
			v2 = (vector float)vec_cmplt(vsum,vmin);
			vsample1 = vec_ld(0,samples);
			vsample2 = vec_ld(15,samples);
			v3 = (vector float)vec_packs((vector signed int)v3,(vector signed int)v3);
			v4 = (vector float)vec_perm(vsample1,vsample2,vperm3);
			v5 = (vector float)vec_perm(v3,v4,vperm5);
			v6 = (vector float)vec_perm(vsample2,vsample1,vperm3);
			v7 = (vector float)vec_perm(v5,v6,vperm4);
			v8 = (vector float)vec_perm(v6,v5,vperm4);
			vec_st((vector signed short)v7,15,samples);
			vec_st((vector signed short)v8,0,samples);
			samples += 6;
#ifdef __APPLE__
			v1 = (vector float)vec_sr((vector unsigned int)v1,(vector unsigned int)(31,31,31,32));
			v2 = (vector float)vec_sr((vector unsigned int)v2,(vector unsigned int)(31,31,31,32));
#else
			v1 = (vector float)vec_sr((vector unsigned int)v1,(vector unsigned int){31,31,31,32});
			v2 = (vector float)vec_sr((vector unsigned int)v2,(vector unsigned int){31,31,31,32});
#endif
			v5 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
			vclip = vec_sums((vector signed int)v5,vclip);
			vec_st(vclip,0,clip_tmp);
			clip += clip_tmp[3];
		}
  }
  if(final) fr->buffer.fill += 128;

  return clip;
}