Incorrect code generated from mixed C++ & inline assembler

[jartim 0]

Bug description:

Compiler generates incorrect code from mixed C++ and inline assembler -

 

Steps to reproduce:

The following is a sample section of code that generates the wrong address for _TestTemp+1 -

void CPUTest()
{
	unsigned char TestTemp[3];

	asm
	{

        CPUTest_9:
            movlw   0xff                        ; set up locations ready to change
            movwf   _TestTemp
            movwf   _TestTemp+1
            movwf   _TestTemp+2				 
            lfsr    0, _TestTemp+1              ; set up a pointer
            movlw   0x55
            movwf   _postdec0
	}
}

Expected behaviour:

In my application TestTemp[0] is located at 0x5C2, TestTemp[1] and [2] are at 0x5C3 and 0x5C4 respectively.
The compiler should load fsr0 with the value 0x5C3 (_TestTemp+1), however the final generated code loads the value 0x5C2 instead.

 

Is the problem 100% reproducible:

100% happens every time

 

IDE version:   MPLAB-X V4.20

Compiler:               BoostC++

Compiler version:     V7.43

Target device: PIC18F8527

OS:                      Win7

 

Comments:

 

[JorgeF 0]

Hi

 

Confirmed, both for C++ and C.

Did you try to send an email to support@sourceboost.com ?

 

Best regards

Jorge

 

Edited July 10, 2018 by JorgeF
typo

[jartim 0]

Hi Jorge

No, not yet, I will do this today. 

I assumed that the forum was the first place to go to report an issue?

 

Regards

Tim

[JorgeF 0]

Hi

 

Usualy the forums are more targeted at experience exchange between users than to technical support.

Same happens with the Microchip forum and a few others I know.

 

Best regards

Jorge