MOVLB bank switch, compiler error

[yo2lio]

Hi,

After several days of hard debugging, I discovered a big problem, for P18 mcu.

Code: Select all

program test_MOVLB

dim i as byte absolute $200
dim j as byte absolute $300

main:
  i = ((j and $10) >> 4) + 48
end.

This code generate the following asm:

Code: Select all

;test.mbas,7 :: 		i = ((j and $10) >> 4) + 48
0x001C	0x0102      	MOVLB       2
0x001E	0x6B00      	CLRF        _i, 1
0x0020	0x0103      	MOVLB       3
0x0022	0xB900      	BTFSC       _j, 4, 1
0x0024	0x0102      	MOVLB       2
0x0026	0x2B00      	INCF        _i, 1, 1
0x0028	0x0E30      	MOVLW       48
0x002A	0x2700      	ADDWF       _i, 1, 1

This combination is very very wrong:

0x0020 0x0103 MOVLB 3
0x0022 0xB900 BTFSC _j, 4, 1
0x0024 0x0102 MOVLB 2

I use version 6.6.2 and will be very nice to have an update for this version with this bug corrected.

Thank you.

[janni]

Hi Florin,

This old bug is finally fixed (among some others) . Here's how v 7.00 handles your code example

Code: Select all

  		i = ((j and $10) >> 4) + 48
0x001C	0x0E00      	MOVLW       0
0x001E	0x0103      	MOVLB       3
0x0020	0xB900      	BTFSC       _j, 4, 1
0x0022	0x0E01      	MOVLW       1
0x0024	0x0102      	MOVLB       2
0x0026	0x6F00      	MOVWF       _i, 1
0x0028	0x0E30      	MOVLW       48
0x002A	0x2700      	ADDWF       _i, 1, 1

[yo2lio]

Hi Janni,

Thank you.

I will go to 7.0

Normally, I don't like to do this (to change the compiler version in the middle of the project).

Thank you again.

[janni]

Yeah, that's risky without detailed check of new version. At the moment, due to some irritating quirks of new IDE, I use the new command-line compiler with older IDE (v 6.61).