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CCS/AWR1642: problem about my code !

HAVI HOUSTON
Intellectual 605 points
Part Number: AWR1642


Tool/software: Code Composer Studio

hi 

i used the awr1642 for my application,but i got a little bit problem about my code.more detail as below:

 is every Local variable will be mapped into the cpu register or the statck?

such as the for loop int the Disassembly :

2307 for (i = 0; i < NFFT; i++)


007f6e40: 5004A35B     [!B1] MVK.L2 1,B0
007f6e44: 7412104B     || [!B2] EXT.S2 B4,16,16,B8
007f6e48: 74A44058     || [!B2] ADD.L1 2,A9,A9
007f6e4c: 30001D11     [!B0] B.S1 $C$L280 (PC+232 = 0x007f6f28)
007f6e50: 7282002A     || [!B2] MVK.S2 0x0400,B5
007f6e54: 00150AFA     CMPLT.L2 B8,B5,B0
007f6e58: 6000A35A     [ B2] MVK.L2 0,B0
007f6e5c: 2FFFFC90     [ B0] B.S1 $C$L276 (PC-28 = 0x007f6e24)

it seems all the Local variable mapping into the register? if i got lots of  Local variable , will some problem gonna happen?

br

havi

  • 0
    TI__Mastermind 22155 points

    Hello Havi,

    When the compiler optimizations are enabled, the variables are more likely to be stored in the registers.  Stack will be used if there are larger local variable . The compiler will analyse the code flow and select which variables are likely to be best stored in registers for optimum performance based on the optimizations enabled.

    This is more of a general runtime behavior of the code.

    What problem in your code are you referring ?

    Regards,

    Raghu

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  • 0 in reply to Raghunandan Kamath
    TI__Mastermind 22155 points
    Havi,

    Let me know if you have any further question on this post. Else we can close the post.

    Thanks,
    Raghu
  • 0 in reply to Raghunandan Kamath
    Intellectual 605 points
    hi Raghu
    i had solved this problem , thank you!
    br
    havi