load.lst

Using DSP/BIOS I/O in Multichannel Systems

TMS320C6x COFF Assembler         Version 4.00     Fri Sep 15 10:28:43 2000
Copyright (c) 1996-2000 Texas Instruments Incorporated
load.s62                                                             PAGE    1

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      51                    ;
      52                    ;  ======== audio_ld.s62 ========
      53                    ;
      54                    ;
      55                    ;  C-callable interface to assembly language utility functions for the
TMS320C6x COFF Assembler         Version 4.00     Fri Sep 15 10:28:43 2000
Copyright (c) 1996-2000 Texas Instruments Incorporated
load.s62                                                             PAGE    2

      56                    ;  audio example.
      57                    
      58                    
      59                            .ref _doLoad
      60                    
      61 00000000                   .text
      62                    
      63          000003E8  N               .set    1000
      64                    
      65                    ;
      66                    ;  ======== _doLoad ========
      67                    ;  This function simulates a load on the DSP by executing N * loopCount
      68                    ;  instructions, where loopCount is the input parameter to doLoad().
      69                    ;
      70                    ;      void doLoad(int loopCount)
      71                    ;
      72                    ;  The loop is using 8 instructions. One instruction for sub, nop and
      73                    ;  b, plus nop 5. The extra nop added after sub is to make the number
      74                    ;  of instructions in the loop a power of 2.
      75                    ;
      76 00000000           _doLoad:
      77                    
      78 00000000 001011A2          mv a4, b0               ; use b0 as loop counter
      79 00000004 30000512    [!b0] b lend                  ; goto lend if b0 = 0
      80 00000008 0081F42A          mvk N,b1
      81 0000000c 00002C82          mpy b1,b0,b0
      82 00000010 00000000          nop
      83 00000014 000069A2          shru b0,3,b0            ; (loop counter)= (# loops)/8 
      84                    
      85 00000018           loop:
      86 00000018 0003E1A2          sub b0,1,b0
      87 0000001c 00000000          nop
      88 00000020 2FFFFF12     [b0] b loop
      89 00000024 00008000          nop 5
      90                    
      91 00000028 000C0362  lend:   b b3
      92 0000002c 00008000          nop 5                   ; return
      93                            
      94                            .end

 No Errors, No Warnings