amf_demux1xn_render.asm

ADI SHARC DSP 音频算法标准模块库

// Copyright(c) 2002-2006 Analog Devices, Inc. All Rights Reserved.
// This software is proprietary and confidential to Analog Devices, Inc. and its licensors.

// File    : $Id: //depot/Development/VisualAudio/Modules/Packs/MuxDemuxPack/2.5.0/SHARC/Source/AMF_DeMux1xN_Render.asm#2 $ 
// Part of : VisualAudio MuxDemuxPack V2.0.1 
// Updated : $Date: 2006/10/12 $ by $Author: Fernando $ 

//    Module Name     : AMF_DeMux1xN_Render.asm 
//    DSP Processor   : ADSP-212xx
//    Original Author : kishore
//    Date            : 08/02/05
//====================================================================================
// Processor resources used:
//  cycles = n + m*TickSize (Assuming all on-chip)
//====================================================================================

// Revision History:
//    8/2/05      kishore     created
//    12/12/05    stilti      reformatted, reassigned registers



#if 1

#include "AudioProcessing.h"
#include "processor.h"
#include "asm_sprt.h"

.import "AMF_DeMux1xN.h";  // for OFFSETOF()

.global _AMF_DeMux1xN_Render;
.type _AMF_DeMux1xN_Render,STT_FUNC;

.segment /pm SEG_MOD_FAST_CODE;

_AMF_DeMux1xN_Render:

//=============================================================================

    entry;
    puts = mode1;
    r2 = i0; puts = r2;
    r2 = i1; puts = r2;
    r2 = i3; puts = r2;

    i0=r4;                      // instance ptr
    i3=r8;                      // i4->*buffers              

    r2=dm((OFFSETOF(AMF_DeMux1xN, b) + OFFSETOF(AMF_ModuleVariable, outputPinCount)) ,i0);  // out pin
    r1=dm(OFFSETOF(AMF_DeMux1xN, Select),i0);    // Select pin
    r12 = lshift r12 by -1;     // ticksize/2 (SIMD in time dimension)
    i0=dm(0x0,i3);              // i0=float *in    
    
    // r4 = outer loop index and offset value for out buffer
    r4=0;          
    
    LCNTR=r2, DO AMF_DeMux_Outer_loop_end UNTIL LCE;

        r0=r4+1;                // Calculating the out buffer OFFSET value
        
        m4=r0;
        i1=dm(m4,i3);           // i1=float *out    
        r2 = r0-1;              // outer loop index                
        m4 = 2;                 // SIMD loop increment
        comp(r2,r1); 
           
        // if it is the selected ouput, copy from input, else clear it
        if ne Jump Clear_out;
        
        bit set mode1 PEYEN;    // Enable PEy:SIMD

        LCNTR=r12, DO AMF_DeMux_loop1_end UNTIL LCE;
            f0 = dm(i0,m4); 
AMF_DeMux_loop1_end:
            dm(i1,m4) = f0;

        bit clr mode1 PEYEN;    // Disable PEy:SIMD

        Jump AMF_DeMux_Outer_loop_end;
        
        
        // else clear the output
Clear_out:

        bit set mode1 PEYEN;    // Enable PEy:SIMD
        nop;
        f0 = 0.0;
        
        LCNTR=r12, DO AMF_DeMux_loop2_end UNTIL LCE;
AMF_DeMux_loop2_end:
            dm(i1,m4) =  f0;

        bit clr mode1 PEYEN;    // Disable PEy:SIMD

    
AMF_DeMux_Outer_loop_end:
    r4= r4+1;                   // outer loop increment


    //========================================================================
    
    i3 = gets(1);
    i1 = gets(2);
    i0 = gets(3);
    mode1 = gets(4);
    alter(4);
    
    leaf_exit;
_AMF_DeMux1xN_Render.end:

#endif