Compiler/AM3358: PRU built-in functions

聿明薛

Prodigy 30 points

Part Number: AM3358

Tool/software: TI C/C++ Compiler

Hi,

I'm coding PRU in c with CCS.

I read PRU Optimizing C/C++ Compiler v2.2 User's Guide (Rev. B)

in section 5.14.5 Built-In Functions (The following built-in functions are supported:......)

I try the __builtin_abs and it is fine.

but when I use __builtin_sqrtf, it shows:

>> main.c, line 10: INTERNAL ERROR: no match for SQRT

This may be a serious problem. Please contact custon support with a description of this problem and a sample of the source file that caused this INTERNAL ERROR message to appear.

Cannot continue compilation - ABORTING!

and use __builtin_sqrt, it shows:

>> Compilation failure "main.c", line 10: error #1494: builtin function __builtin_sqrt not supported 1 error detected in the compilation of "main.c".

Is the built-in function __builtin_sqrt supported or not?

version are

ti-processor-sdk-linux-am335x-evm-04.01.00.06

CCS7.4.0.00015_linux-x64

ti_cgt_pru_2.2.1_linux_installer_x86.bin

Thanks,

Leo

over 7 years ago

0 Nick Saulnier over 7 years ago

TI__Guru** 107000 points

Hello Leo,

I am able to replicate your results on CCS7.2 and will try to get some information from the compiler team. In the meantime, could you post some of the offending code snippets?

Regards,
Nick

0 聿明薛 over 7 years ago in reply to Nick Saulnier

Prodigy 30 points

Hello Nick,

Here is some of the offending code.

void main(void) {
    float f = 4;
    float s = __builtin_sqrt(f);
}

0 George Mock over 7 years ago

TI__Guru**** 252320 points

user3675649 said:
Is the built-in function __builtin_sqrt supported or not?

Unfortunately, no. I apologize for the error in the documentation. I filed CODEGEN-4643 in the SDOWP system to have this corrected. You are welcome to follow it with the SDOWP link below in my signature.

Thanks and regards,

-George

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Compiler/AM3358: PRU built-in functions