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Compiler/AWR1642: the function declaration of c6x.h

user6124565
Prodigy 60 points

Part Number: AWR1642

Tool/software: TI C/C++ Compiler

Hi , many functions   are declared in the c6x.h,

such as 

double    _fabs    (double);
float     _fabsf   (float);
long long _mpyidll (int,      int);
int       _spint   (float);
int       _dpint   (double);

What does _spint mean？ I can't find an explanation for these functions. Can you help me?

The location of c6x.h  on my computer   is:   C:\ti\ccs920\ccs\tools\compiler\ti-cgt-c6000_8.3.4\lib\src.

Tanks

  • 0
    TI__Guru**** 253380 points

    user6124565 said:
    double    _fabs    (double);
    float     _fabsf   (float);
    long long _mpyidll (int,      int);
    int       _spint   (float);
    int       _dpint   (double);

    Those are the names of intrinsics.  An intrinsic acts like a function call, but is not implemented by calling a function.  Instead, one instruction (sometimes a few instructions) is emitted.  The name of the intrinsic is usually similar to the instruction.  Please search the C6000 compiler manual for the sub-chapter titled Using Intrinsics to Access Assembly Language Statements.  The behavior of each intrinsic is documented.

    Thanks and regards,

    -George