synth_altivec.c File Reference

#include "mpg123lib_intern.h"
#include <altivec.h>

Include dependency graph for synth_altivec.c:

Go to the source code of this file.

Macros
#define	SYNTH_ALTIVEC(B0STEP)
#define	SYNTH_STEREO_ALTIVEC(B0STEP)

Functions
int	synth_1to1_altivec (real *bandPtr, int channel, mpg123_handle *fr, int final)
int	synth_1to1_stereo_altivec (real *bandPtr_l, real *bandPtr_r, mpg123_handle *fr)
int	synth_1to1_real_altivec (real *bandPtr, int channel, mpg123_handle *fr, int final)
int	synth_1to1_fltst_altivec (real *bandPtr_l, real *bandPtr_r, mpg123_handle *fr)
int	synth_1to1_s32_altivec (real *bandPtr, int channel, mpg123_handle *fr, int final)
int	synth_1to1_s32_stereo_altivec (real *bandPtr_l, real *bandPtr_r, mpg123_handle *fr)

Macro Definition Documentation

SYNTH_ALTIVEC

#define SYNTH_ALTIVEC

(

B0STEP

)

Definition at line 17 of file synth_altivec.c.

SYNTH_STEREO_ALTIVEC

#define SYNTH_STEREO_ALTIVEC

(

B0STEP

)

Definition at line 116 of file synth_altivec.c.

Function Documentation

synth_1to1_altivec()

int synth_1to1_altivec	(	real *	bandPtr,
		int	channel,
		mpg123_handle *	fr,
		int	final
	)

Definition at line 258 of file synth_altivec.c.

{
    short *samples = (short *) (fr->buffer.data+fr->buffer.fill);
    
    real *b0, **buf;
    int clip; 
    int bo1;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings) do_equalizer(bandPtr,channel,fr->equalizer);
#endif
    if(!channel)
    {
        fr->bo--;
        fr->bo &= 0xf;
        buf = fr->real_buffs[0];
    }
    else
    {
        samples++;
        buf = fr->real_buffs[1];
    }
    
    if(fr->bo & 0x1)
    {
        b0 = buf[0];
        bo1 = fr->bo;
        dct64_altivec(buf[1]+((fr->bo+1)&0xf),buf[0]+fr->bo,bandPtr);
    }
    else
    {
        b0 = buf[1];
        bo1 = fr->bo+1;
        dct64_altivec(buf[0]+fr->bo,buf[1]+fr->bo+1,bandPtr);
    }
    
    
    {
        register int j;
        real *window = fr->decwin + 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;
        vector float vsum,vsum2,vsum3,vsum4,vmin,vmax,vzero;
        vector signed int vclip;
        vector signed short vsample1,vsample2;
        vector unsigned int vshift;
        vclip = vec_xor(vclip,vclip);
        vzero = vec_xor(vzero,vzero);
        vshift = vec_splat_u32(-1); /* 31 */
#ifdef __APPLE__
        vmax = (vector float)(32767.0f);
        vmin = (vector float)(-32768.0f);
        vperm4 = (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};
        vperm4 = (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);
        vperm2 = vec_lvsl(0,samples);
        vperm3 = vec_lvsr(0,samples);
        for (j=4;j;j--)
        {
            SYNTH_ALTIVEC(16);
            
            vsum = vec_sub(v5,v6);
            v9 = vec_sub(v7,v8);
            vsum = vec_add(vsum,v9);
            
            v3 = vec_round(vsum);
            v3 = (vector float)vec_cts(v3,0);
            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,vperm2);
            v5 = (vector float)vec_perm(v3,v4,vperm4);
            v6 = (vector float)vec_perm(vsample2,vsample1,vperm2);
            v7 = (vector float)vec_perm(v5,v6,vperm3);
            v8 = (vector float)vec_perm(v6,v5,vperm3);
            vec_st((vector signed short)v7,15,samples);
            vec_st((vector signed short)v8,0,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v1, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v2, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            vclip = vec_sums((vector signed int)v1,vclip);
        }
        
        for (j=4;j;j--)
        {
            SYNTH_ALTIVEC(-16);
            
            vsum = vec_add(v5,v6);
            v9 = vec_add(v7,v8);
            vsum = vec_add(vsum,v9);
            
            v3 = vec_round(vsum);
            v3 = (vector float)vec_cts(v3,0);
            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,vperm2);
            v5 = (vector float)vec_perm(v3,v4,vperm4);
            v6 = (vector float)vec_perm(vsample2,vsample1,vperm2);
            v7 = (vector float)vec_perm(v5,v6,vperm3);
            v8 = (vector float)vec_perm(v6,v5,vperm3);
            vec_st((vector signed short)v7,15,samples);
            vec_st((vector signed short)v8,0,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v1, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v2, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            vclip = vec_sums((vector signed int)v1,vclip);
        }

        vec_st(vclip,0,clip_tmp);
        clip = clip_tmp[3];
    }
    if(final) fr->buffer.fill += 128;
    
    return clip;
}

synth_1to1_fltst_altivec()

int synth_1to1_fltst_altivec	(	real *	bandPtr_l,
		real *	bandPtr_r,
		mpg123_handle *	fr
	)

Definition at line 656 of file synth_altivec.c.

{
    real *samples = (real *) (fr->buffer.data+fr->buffer.fill);
    
    real *b0l, *b0r, **bufl, **bufr;
    int bo1;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings)
    {
        do_equalizer(bandPtr_l,0,fr->equalizer);
        do_equalizer(bandPtr_r,1,fr->equalizer);
    }
#endif
    fr->bo--;
    fr->bo &= 0xf;
    bufl = fr->real_buffs[0];
    bufr = fr->real_buffs[1];
    
    if(fr->bo & 0x1)
    {
        b0l = bufl[0];
        b0r = bufr[0];
        bo1 = fr->bo;
        dct64_altivec(bufl[1]+((fr->bo+1)&0xf),bufl[0]+fr->bo,bandPtr_l);
        dct64_altivec(bufr[1]+((fr->bo+1)&0xf),bufr[0]+fr->bo,bandPtr_r);
    }
    else
    {
        b0l = bufl[1];
        b0r = bufr[1];
        bo1 = fr->bo+1;
        dct64_altivec(bufl[0]+fr->bo,bufl[1]+fr->bo+1,bandPtr_l);
        dct64_altivec(bufr[0]+fr->bo,bufr[1]+fr->bo+1,bandPtr_r);
    }
    
    
    {
        register int j;
        real *window = fr->decwin + 16 - bo1;
        
        vector float v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13;
        vector unsigned char vperm1,vperm2;
        vector float vsum,vsum2,vsum3,vsum4,vsum5,vsum6,vsum7,vsum8,vscale,vzero;
        vector float vprev;
        vzero = vec_xor(vzero,vzero);
#ifdef __APPLE__
        vscale = (vector float)(1.0f/32768.0f);
#else
        vscale = (vector float){1.0f/32768.0f,1.0f/32768.0f,1.0f/32768.0f,1.0f/32768.0f};
#endif
        
        vperm1 = vec_lvsl(0,window);
        vperm2 = vec_lvsr(0,samples);
        vprev = vec_perm(vec_ld(0,samples),vec_ld(0,samples),vec_lvsl(0,samples));
        for (j=4;j;j--)
        {
            SYNTH_STEREO_ALTIVEC(16);
            
            vsum = vec_sub(vsum,vsum2);
            vsum2 = vec_sub(vsum5,vsum6);
            vsum3 = vec_sub(vsum3,vsum4);
            vsum4 = vec_sub(vsum7,vsum8);
            vsum = vec_add(vsum,vsum3);
            vsum2 = vec_add(vsum2,vsum4);
            vsum = vec_madd(vsum, vscale, vzero);
            vsum2 = vec_madd(vsum2, vscale, vzero);
            
            v1 = vec_mergeh(vsum, vsum2);
            v2 = vec_mergel(vsum, vsum2);
            v3 = vec_perm(vprev,v1,vperm2);
            v4 = vec_perm(v1,v2,vperm2);
            vprev = v2;
            vec_st(v3,0,samples);
            vec_st(v4,16,samples);
            samples += 8;
        }
        
        for (j=4;j;j--)
        {
            SYNTH_STEREO_ALTIVEC(-16);
            
            vsum = vec_add(vsum,vsum2);
            vsum2 = vec_add(vsum5,vsum6);
            vsum3 = vec_add(vsum3,vsum4);
            vsum4 = vec_add(vsum7,vsum8);
            vsum = vec_add(vsum,vsum3);
            vsum2 = vec_add(vsum2,vsum4);
            vsum = vec_madd(vsum, vscale, vzero);
            vsum2 = vec_madd(vsum2, vscale, vzero);
            
            v1 = vec_mergeh(vsum, vsum2);
            v2 = vec_mergel(vsum, vsum2);
            v3 = vec_perm(vprev,v1,vperm2);
            v4 = vec_perm(v1,v2,vperm2);
            vprev = v2;
            vec_st(v3,0,samples);
            vec_st(v4,16,samples);
            samples += 8;
        }
        
        if((size_t)samples & 0xf)
        {
            v1 = (vector float)vec_perm(vec_ld(0,samples),vec_ld(0,samples),vec_lvsl(0,samples));
            v2 = (vector float)vec_perm(vprev,v1,vperm2);
            vec_st(v2,0,samples);
        }
    }
    fr->buffer.fill += 256;
    
    return 0;
}

synth_1to1_real_altivec()

int synth_1to1_real_altivec	(	real *	bandPtr,
		int	channel,
		mpg123_handle *	fr,
		int	final
	)

Definition at line 540 of file synth_altivec.c.

{
    real *samples = (real *) (fr->buffer.data+fr->buffer.fill);
    
    real *b0, **buf;
    int bo1;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings) do_equalizer(bandPtr,channel,fr->equalizer);
#endif
    if(!channel)
    {
        fr->bo--;
        fr->bo &= 0xf;
        buf = fr->real_buffs[0];
    }
    else
    {
        samples++;
        buf = fr->real_buffs[1];
    }
    
    if(fr->bo & 0x1)
    {
        b0 = buf[0];
        bo1 = fr->bo;
        dct64_altivec(buf[1]+((fr->bo+1)&0xf),buf[0]+fr->bo,bandPtr);
    }
    else
    {
        b0 = buf[1];
        bo1 = fr->bo+1;
        dct64_altivec(buf[0]+fr->bo,buf[1]+fr->bo+1,bandPtr);
    }
    
    
    {
        register int j;
        real *window = fr->decwin + 16 - bo1;
        
        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,vscale,vzero;
        vector float vsample1,vsample2,vsample3;
        vzero = vec_xor(vzero, vzero);
#ifdef __APPLE__
        vscale = (vector float)(1.0f/32768.0f);
        vperm4 = (vector unsigned char)(0,1,2,3,20,21,22,23,4,5,6,7,28,29,30,31);
        vperm5 = (vector unsigned char)(8,9,10,11,20,21,22,23,12,13,14,15,28,29,30,31);
#else
        vscale = (vector float){1.0f/32768.0f,1.0f/32768.0f,1.0f/32768.0f,1.0f/32768.0f};
        vperm4 = (vector unsigned char){0,1,2,3,20,21,22,23,4,5,6,7,28,29,30,31};
        vperm5 = (vector unsigned char){8,9,10,11,20,21,22,23,12,13,14,15,28,29,30,31};
#endif
        
        vperm1 = vec_lvsl(0,window);
        vperm2 = vec_lvsl(0,samples);
        vperm3 = vec_lvsr(0,samples);
        for (j=4;j;j--)
        {
            SYNTH_ALTIVEC(16);
            
            vsum = vec_sub(v5,v6);
            v9 = vec_sub(v7,v8);
            vsum = vec_add(vsum,v9);
            vsum = vec_madd(vsum, vscale, vzero);
            
            vsample1 = vec_ld(0,samples);
            vsample2 = vec_ld(16,samples);
            vsample3 = vec_ld(31,samples);
            v1 = vec_perm(vsample1, vsample2, vperm2);
            v2 = vec_perm(vsample2, vsample3, vperm2);
            v1 = vec_perm(vsum, v1, vperm4);
            v2 = vec_perm(vsum, v2, vperm5);
            v3 = vec_perm(vsample3, vsample2, vperm2);
            v4 = vec_perm(vsample2, vsample1, vperm2);
            v5 = vec_perm(v2, v3, vperm3);
            v6 = vec_perm(v1, v2, vperm3);
            v7 = vec_perm(v4, v1, vperm3);
            vec_st(v5,31,samples);
            vec_st(v6,16,samples);
            vec_st(v7,0,samples);
            samples += 8;
        }
        
        for (j=4;j;j--)
        {
            SYNTH_ALTIVEC(-16);
            
            vsum = vec_add(v5,v6);
            v9 = vec_add(v7,v8);
            vsum = vec_add(vsum,v9);
            vsum = vec_madd(vsum, vscale, vzero);
            
            vsample1 = vec_ld(0,samples);
            vsample2 = vec_ld(16,samples);
            vsample3 = vec_ld(31,samples);
            v1 = vec_perm(vsample1, vsample2, vperm2);
            v2 = vec_perm(vsample2, vsample3, vperm2);
            v1 = vec_perm(vsum, v1, vperm4);
            v2 = vec_perm(vsum, v2, vperm5);
            v3 = vec_perm(vsample3, vsample2, vperm2);
            v4 = vec_perm(vsample2, vsample1, vperm2);
            v5 = vec_perm(v2, v3, vperm3);
            v6 = vec_perm(v1, v2, vperm3);
            v7 = vec_perm(v4, v1, vperm3);
            vec_st(v5,31,samples);
            vec_st(v6,16,samples);
            vec_st(v7,0,samples);
            samples += 8;
        }
    }
    if(final) fr->buffer.fill += 256;
    
    return 0;
}

synth_1to1_s32_altivec()

int synth_1to1_s32_altivec	(	real *	bandPtr,
		int	channel,
		mpg123_handle *	fr,
		int	final
	)

Definition at line 768 of file synth_altivec.c.

{
    int32_t *samples = (int32_t *) (fr->buffer.data+fr->buffer.fill);
    
    real *b0, **buf;
    int clip;
    int bo1;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings) do_equalizer(bandPtr,channel,fr->equalizer);
#endif
    if(!channel)
    {
        fr->bo--;
        fr->bo &= 0xf;
        buf = fr->real_buffs[0];
    }
    else
    {
        samples++;
        buf = fr->real_buffs[1];
    }
    
    if(fr->bo & 0x1)
    {
        b0 = buf[0];
        bo1 = fr->bo;
        dct64_altivec(buf[1]+((fr->bo+1)&0xf),buf[0]+fr->bo,bandPtr);
    }
    else
    {
        b0 = buf[1];
        bo1 = fr->bo+1;
        dct64_altivec(buf[0]+fr->bo,buf[1]+fr->bo+1,bandPtr);
    }
    
    
    {
        register int j;
        real *window = fr->decwin + 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,vmax,vmin,vzero;
        vector signed int vsample1,vsample2,vsample3;
        vector unsigned int vshift;
        vector signed int vclip;
        vzero = vec_xor(vzero, vzero);
        vclip = vec_xor(vclip, vclip);
        vshift = vec_splat_u32(-1); /* 31 */
#ifdef __APPLE__
        vmax = (vector float)(32767.999f);
        vmin = (vector float)(-32768.0f);
        vperm4 = (vector unsigned char)(0,1,2,3,20,21,22,23,4,5,6,7,28,29,30,31);
        vperm5 = (vector unsigned char)(8,9,10,11,20,21,22,23,12,13,14,15,28,29,30,31);
#else
        vmax = (vector float){32767.999f,32767.999f,32767.999f,32767.999f};
        vmin = (vector float){-32768.0f,-32768.0f,-32768.0f,-32768.0f};
        vperm4 = (vector unsigned char){0,1,2,3,20,21,22,23,4,5,6,7,28,29,30,31};
        vperm5 = (vector unsigned char){8,9,10,11,20,21,22,23,12,13,14,15,28,29,30,31};
#endif
        
        vperm1 = vec_lvsl(0,window);
        vperm2 = vec_lvsl(0,samples);
        vperm3 = vec_lvsr(0,samples);
        for (j=4;j;j--)
        {
            SYNTH_ALTIVEC(16);
            
            vsum = vec_sub(v5,v6);
            v9 = vec_sub(v7,v8);
            v1 = vec_add(vsum,v9);
            vsum = (vector float)vec_cts(v1,16);
            v8 = (vector float)vec_cmpgt(v1,vmax);
            v9 = (vector float)vec_cmplt(v1,vmin);
            
            vsample1 = vec_ld(0,samples);
            vsample2 = vec_ld(16,samples);
            vsample3 = vec_ld(31,samples);
            v1 = (vector float)vec_perm(vsample1, vsample2, vperm2);
            v2 = (vector float)vec_perm(vsample2, vsample3, vperm2);
            v1 = vec_perm(vsum, v1, vperm4);
            v2 = vec_perm(vsum, v2, vperm5);
            v3 = (vector float)vec_perm(vsample3, vsample2, vperm2);
            v4 = (vector float)vec_perm(vsample2, vsample1, vperm2);
            v5 = vec_perm(v2, v3, vperm3);
            v6 = vec_perm(v1, v2, vperm3);
            v7 = vec_perm(v4, v1, vperm3);
            vec_st((vector signed int)v5,31,samples);
            vec_st((vector signed int)v6,16,samples);
            vec_st((vector signed int)v7,0,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v8, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v9, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            vclip = vec_sums((vector signed int)v1,vclip);
        }
        
        for (j=4;j;j--)
        {
            SYNTH_ALTIVEC(-16);
            
            vsum = vec_add(v5,v6);
            v9 = vec_add(v7,v8);
            v1 = vec_add(vsum,v9);
            vsum = (vector float)vec_cts(v1,16);
            v8 = (vector float)vec_cmpgt(v1,vmax);
            v9 = (vector float)vec_cmplt(v1,vmin);
            
            vsample1 = vec_ld(0,samples);
            vsample2 = vec_ld(16,samples);
            vsample3 = vec_ld(31,samples);
            v1 = (vector float)vec_perm(vsample1, vsample2, vperm2);
            v2 = (vector float)vec_perm(vsample2, vsample3, vperm2);
            v1 = vec_perm(vsum, v1, vperm4);
            v2 = vec_perm(vsum, v2, vperm5);
            v3 = (vector float)vec_perm(vsample3, vsample2, vperm2);
            v4 = (vector float)vec_perm(vsample2, vsample1, vperm2);
            v5 = vec_perm(v2, v3, vperm3);
            v6 = vec_perm(v1, v2, vperm3);
            v7 = vec_perm(v4, v1, vperm3);
            vec_st((vector signed int)v5,31,samples);
            vec_st((vector signed int)v6,16,samples);
            vec_st((vector signed int)v7,0,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v8, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v9, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            vclip = vec_sums((vector signed int)v1,vclip);
        }
        
        vec_st(vclip,0,clip_tmp);
        clip = clip_tmp[3];
    }
    if(final) fr->buffer.fill += 256;
    
    return clip;
}

synth_1to1_s32_stereo_altivec()

int synth_1to1_s32_stereo_altivec	(	real *	bandPtr_l,
		real *	bandPtr_r,
		mpg123_handle *	fr
	)

Definition at line 910 of file synth_altivec.c.

{
    int32_t *samples = (int32_t *) (fr->buffer.data+fr->buffer.fill);
    
    real *b0l, *b0r, **bufl, **bufr;
    int clip;
    int bo1;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings)
    {
        do_equalizer(bandPtr_l,0,fr->equalizer);
        do_equalizer(bandPtr_r,1,fr->equalizer);
    }
#endif
    fr->bo--;
    fr->bo &= 0xf;
    bufl = fr->real_buffs[0];
    bufr = fr->real_buffs[1];
    
    if(fr->bo & 0x1)
    {
        b0l = bufl[0];
        b0r = bufr[0];
        bo1 = fr->bo;
        dct64_altivec(bufl[1]+((fr->bo+1)&0xf),bufl[0]+fr->bo,bandPtr_l);
        dct64_altivec(bufr[1]+((fr->bo+1)&0xf),bufr[0]+fr->bo,bandPtr_r);
    }
    else
    {
        b0l = bufl[1];
        b0r = bufr[1];
        bo1 = fr->bo+1;
        dct64_altivec(bufl[0]+fr->bo,bufl[1]+fr->bo+1,bandPtr_l);
        dct64_altivec(bufr[0]+fr->bo,bufr[1]+fr->bo+1,bandPtr_r);
    }
    
    
    {
        register int j;
        real *window = fr->decwin + 16 - bo1;
        
        ALIGNED(16) int clip_tmp[4];
        vector float v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13;
        vector unsigned char vperm1,vperm2;
        vector float vsum,vsum2,vsum3,vsum4,vsum5,vsum6,vsum7,vsum8,vmax,vmin,vzero;
        vector float vprev;
        vector unsigned int vshift;
        vector signed int vclip;
        vzero = vec_xor(vzero, vzero);
        vclip = vec_xor(vclip, vclip);
        vshift = vec_splat_u32(-1); /* 31 */
#ifdef __APPLE__
        vmax = (vector float)(32767.999f);
        vmin = (vector float)(-32768.0f);
#else
        vmax = (vector float){32767.999f,32767.999f,32767.999f,32767.999f};
        vmin = (vector float){-32768.0f,-32768.0f,-32768.0f,-32768.0f};
#endif
        
        vperm1 = vec_lvsl(0,window);
        vperm2 = vec_lvsr(0,samples);
        vprev = (vector float)vec_perm(vec_ld(0,samples),vec_ld(0,samples),vec_lvsl(0,samples));
        for (j=4;j;j--)
        {
            SYNTH_STEREO_ALTIVEC(16);
            
            vsum = vec_sub(vsum,vsum2);
            vsum2 = vec_sub(vsum5,vsum6);
            vsum3 = vec_sub(vsum3,vsum4);
            vsum4 = vec_sub(vsum7,vsum8);
            v1 = vec_add(vsum,vsum3);
            v2 = vec_add(vsum2,vsum4);
            vsum = (vector float)vec_cts(v1,16);
            vsum2 = (vector float)vec_cts(v2,16);
            v5 = (vector float)vec_cmpgt(v1,vmax);
            v6 = (vector float)vec_cmplt(v1,vmin);
            v7 = (vector float)vec_cmpgt(v2,vmax);
            v8 = (vector float)vec_cmplt(v2,vmin);
            
            v1 = vec_mergeh(vsum, vsum2);
            v2 = vec_mergel(vsum, vsum2);
            v3 = vec_perm(vprev,v1,vperm2);
            v4 = vec_perm(v1,v2,vperm2);
            vprev = v2;
            vec_st((vector signed int)v3,0,samples);
            vec_st((vector signed int)v4,16,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v5, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v6, vshift);
            v3 = (vector float)vec_sr((vector unsigned int)v7, vshift);
            v4 = (vector float)vec_sr((vector unsigned int)v8, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            v2 = (vector float)vec_add((vector unsigned int)v3,(vector unsigned int)v4);
            vclip = vec_sums((vector signed int)v1,vclip);
            vclip = vec_sums((vector signed int)v2,vclip);
        }
        
        for (j=4;j;j--)
        {
            SYNTH_STEREO_ALTIVEC(-16);
            
            vsum = vec_add(vsum,vsum2);
            vsum2 = vec_add(vsum5,vsum6);
            vsum3 = vec_add(vsum3,vsum4);
            vsum4 = vec_add(vsum7,vsum8);
            v1 = vec_add(vsum,vsum3);
            v2 = vec_add(vsum2,vsum4);
            vsum = (vector float)vec_cts(v1,16);
            vsum2 = (vector float)vec_cts(v2,16);
            v5 = (vector float)vec_cmpgt(v1,vmax);
            v6 = (vector float)vec_cmplt(v1,vmin);
            v7 = (vector float)vec_cmpgt(v2,vmax);
            v8 = (vector float)vec_cmplt(v2,vmin);
            
            v1 = vec_mergeh(vsum, vsum2);
            v2 = vec_mergel(vsum, vsum2);
            v3 = vec_perm(vprev,v1,vperm2);
            v4 = vec_perm(v1,v2,vperm2);
            vprev = v2;
            vec_st((vector signed int)v3,0,samples);
            vec_st((vector signed int)v4,16,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v5, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v6, vshift);
            v3 = (vector float)vec_sr((vector unsigned int)v7, vshift);
            v4 = (vector float)vec_sr((vector unsigned int)v8, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            v2 = (vector float)vec_add((vector unsigned int)v3,(vector unsigned int)v4);
            vclip = vec_sums((vector signed int)v1,vclip);
            vclip = vec_sums((vector signed int)v2,vclip);
        }
        
        if((size_t)samples & 0xf)
        {
            v1 = (vector float)vec_perm(vec_ld(0,samples),vec_ld(0,samples),vec_lvsl(0,samples));
            v2 = (vector float)vec_perm(vprev,v1,vperm2);
            vec_st((vector signed int)v2,0,samples);
        }
        
        vec_st(vclip,0,clip_tmp);
        clip = clip_tmp[3];
    }
    fr->buffer.fill += 256;
    
    return clip;
}

synth_1to1_stereo_altivec()

int synth_1to1_stereo_altivec	(	real *	bandPtr_l,
		real *	bandPtr_r,
		mpg123_handle *	fr
	)

Definition at line 389 of file synth_altivec.c.

{
    short *samples = (short *) (fr->buffer.data+fr->buffer.fill);
    
    real *b0l, *b0r, **bufl, **bufr;
    int clip; 
    int bo1;
#ifndef NO_EQUALIZER
    if(fr->have_eq_settings)
    {
        do_equalizer(bandPtr_l,0,fr->equalizer);
        do_equalizer(bandPtr_r,1,fr->equalizer);
    }
#endif
    fr->bo--;
    fr->bo &= 0xf;
    bufl = fr->real_buffs[0];
    bufr = fr->real_buffs[1];
    
    if(fr->bo & 0x1)
    {
        b0l = bufl[0];
        b0r = bufr[0];
        bo1 = fr->bo;
        dct64_altivec(bufl[1]+((fr->bo+1)&0xf),bufl[0]+fr->bo,bandPtr_l);
        dct64_altivec(bufr[1]+((fr->bo+1)&0xf),bufr[0]+fr->bo,bandPtr_r);
    }
    else
    {
        b0l = bufl[1];
        b0r = bufr[1];
        bo1 = fr->bo+1;
        dct64_altivec(bufl[0]+fr->bo,bufl[1]+fr->bo+1,bandPtr_l);
        dct64_altivec(bufr[0]+fr->bo,bufr[1]+fr->bo+1,bandPtr_r);
    }
    
    
    {
        register int j;
        real *window = fr->decwin + 16 - bo1;
        
        ALIGNED(16) int clip_tmp[4];
        vector float v1,v2,v3,v4,v5,v6,v7,v8,v9,v10,v11,v12,v13;
        vector unsigned char vperm1,vperm2;
        vector float vsum,vsum2,vsum3,vsum4,vsum5,vsum6,vsum7,vsum8,vmin,vmax,vzero;
        vector signed int vclip;
        vector unsigned int vshift;
        vector signed short vprev;
        vclip = vec_xor(vclip,vclip);
        vzero = vec_xor(vzero,vzero);
        vshift = vec_splat_u32(-1); /* 31 */
#ifdef __APPLE__
        vmax = (vector float)(32767.0f);
        vmin = (vector float)(-32768.0f);
#else
        vmax = (vector float){32767.0f,32767.0f,32767.0f,32767.0f};
        vmin = (vector float){-32768.0f,-32768.0f,-32768.0f,-32768.0f};
#endif
        
        vperm1 = vec_lvsl(0,window);
        vperm2 = vec_lvsr(0,samples);
        vprev = vec_perm(vec_ld(0,samples),vec_ld(0,samples),vec_lvsl(0,samples));
        for (j=4;j;j--)
        {
            SYNTH_STEREO_ALTIVEC(16);
            
            vsum = vec_sub(vsum,vsum2);
            vsum2 = vec_sub(vsum5,vsum6);
            vsum3 = vec_sub(vsum3,vsum4);
            vsum4 = vec_sub(vsum7,vsum8);
            vsum = vec_add(vsum,vsum3);
            vsum2 = vec_add(vsum2,vsum4);
            
            v1 = vec_round(vsum);
            v2 = vec_round(vsum2);
            v1 = (vector float)vec_cts(v1,0);
            v2 = (vector float)vec_cts(v2,0);
            v3 = vec_mergeh(v1, v2);
            v4 = vec_mergel(v1, v2);
            v5 = (vector float)vec_packs((vector signed int)v3,(vector signed int)v4);
            v6 = (vector float)vec_perm(vprev,(vector signed short)v5,vperm2);
            vprev = (vector signed short)v5;
            v1 = (vector float)vec_cmpgt(vsum,vmax);
            v2 = (vector float)vec_cmplt(vsum,vmin);
            v3 = (vector float)vec_cmpgt(vsum2,vmax);
            v4 = (vector float)vec_cmplt(vsum2,vmin);
            vec_st((vector signed short)v6,0,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v1, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v2, vshift);
            v3 = (vector float)vec_sr((vector unsigned int)v3, vshift);
            v4 = (vector float)vec_sr((vector unsigned int)v4, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            v2 = (vector float)vec_add((vector unsigned int)v3,(vector unsigned int)v4);
            vclip = vec_sums((vector signed int)v1,vclip);
            vclip = vec_sums((vector signed int)v2,vclip);
        }
        
        for (j=4;j;j--)
        {
            SYNTH_STEREO_ALTIVEC(-16);
            
            vsum = vec_add(vsum,vsum2);
            vsum2 = vec_add(vsum5,vsum6);
            vsum3 = vec_add(vsum3,vsum4);
            vsum4 = vec_add(vsum7,vsum8);
            vsum = vec_add(vsum,vsum3);
            vsum2 = vec_add(vsum2,vsum4);
            
            v1 = vec_round(vsum);
            v2 = vec_round(vsum2);
            v1 = (vector float)vec_cts(v1,0);
            v2 = (vector float)vec_cts(v2,0);
            v3 = vec_mergeh(v1, v2);
            v4 = vec_mergel(v1, v2);
            v5 = (vector float)vec_packs((vector signed int)v3,(vector signed int)v4);
            v6 = (vector float)vec_perm(vprev,(vector signed short)v5,vperm2);
            vprev = (vector signed short)v5;
            v1 = (vector float)vec_cmpgt(vsum,vmax);
            v2 = (vector float)vec_cmplt(vsum,vmin);
            v3 = (vector float)vec_cmpgt(vsum2,vmax);
            v4 = (vector float)vec_cmplt(vsum2,vmin);
            vec_st((vector signed short)v6,0,samples);
            samples += 8;
            
            v1 = (vector float)vec_sr((vector unsigned int)v1, vshift);
            v2 = (vector float)vec_sr((vector unsigned int)v2, vshift);
            v3 = (vector float)vec_sr((vector unsigned int)v3, vshift);
            v4 = (vector float)vec_sr((vector unsigned int)v4, vshift);
            v1 = (vector float)vec_add((vector unsigned int)v1,(vector unsigned int)v2);
            v2 = (vector float)vec_add((vector unsigned int)v3,(vector unsigned int)v4);
            vclip = vec_sums((vector signed int)v1,vclip);
            vclip = vec_sums((vector signed int)v2,vclip);
        }
        
        if((size_t)samples & 0xf)
        {
            v1 = (vector float)vec_perm(vec_ld(0,samples),vec_ld(0,samples),vec_lvsl(0,samples));
            v2 = (vector float)vec_perm(vprev,(vector signed short)v1,vperm2);
            vec_st((vector signed short)v2,0,samples);
        }

        vec_st(vclip,0,clip_tmp);
        clip = clip_tmp[3];
    }
    fr->buffer.fill += 128;
    
    return clip;
}