HI-TECH Software Forums: Incorrect code generation on IRQ entry/exit *Urgent*

Dear Sirs,

We have an interrupt routine that apparently uses dtemp0 and dtemp1. As far as we understand the compiler used storage, these are mem-variables, and not registers.
In the listing below, you can see the
Code:


mov a,reg[dtemp0]
push	a
mov a,reg[dtemp1]
push	a

Since dtemp0 is 0x00 and dtemp1 is 0x01, this reads PRT0DR and PRT0IE.
At exit (and restore) it WRITES them, and this changes the value, since the read is the input status, and the write influences the pull-up's.

Please fix this urgently and let me know when and where it is available.

The entry of the IRQ looks like:

Code:


 21816  6FFA                    _IsrMouseSPI:
 21817                          	psect	vectors
 21818  0038                    	org	0x38
 21819  0038  7D 6FFA           	ljmp	_IsrMouseSPI
 21820                          	psect	intrtext
 21821  6FFA  08                	push	a
 21822  6FFB  10                	push	x
 21823  6FFC  5D 00             	mov a,reg[dtemp0]
 21824  6FFE  08                	push	a
 21825  6FFF  5D 01             	mov a,reg[dtemp1]
 21826  7001  08                	push	a
 21827  7002  5D 6C             	mov a,reg[TMP_DR0]
 21828  7004  08                	push	a
 21829  7005  5D 6D             	mov a,reg[TMP_DR1]
 21830  7007  08                	push	a
 21831  7008  5D 6E             	mov a,reg[TMP_DR2]
 21832  700A  08                	push	a
 21833  700B  5D 6F             	mov a,reg[TMP_DR3]
 21834  700D  08                	push	a
 21835  700E  5D D0             	mov a,reg[CUR_PP]
 21836  7010  08                	push	a
 21837  7011  5D D3             	mov a,reg[IDX_PP]
 21838  7013  08                	push	a
 21839  7014  5D D4             	mov a,reg[MVR_PP]
 21840  7016  08                	push	a
 21841  7017  5D D5             	mov a,reg[MVW_PP]
 21842  7019  08                	push	a

and the exit

Code:


 21922  706D  18                	pop	a
 21923  706E  60 D5             	mov reg[MVW_PP],a
 21924  7070  18                	pop	a
 21925  7071  60 D4             	mov reg[MVR_PP],a
 21926  7073  18                	pop	a
 21927  7074  60 D3             	mov reg[IDX_PP],a
 21928  7076  18                	pop	a
 21929  7077  60 D0             	mov reg[CUR_PP],a
 21930  7079  18                	pop	a
 21931  707A  60 6F             	mov reg[TMP_DR3],a
 21932  707C  18                	pop	a
 21933  707D  60 6E             	mov reg[TMP_DR2],a
 21934  707F  18                	pop	a
 21935  7080  60 6D             	mov reg[TMP_DR1],a
 21936  7082  18                	pop	a
 21937  7083  60 6C             	mov reg[TMP_DR0],a
 21938  7085  18                	pop	a
 21939  7086  60 01             	mov reg[dtemp1],a
 21940  7088  18                	pop	a
 21941  7089  60 00             	mov reg[dtemp0],a
 21942  708B  20                	pop	x
 21943  708C  18                	pop	a
 21944  708D  7E                	reti

.......

 27932                          	psect	bss0,class=RAM,space=1
 27933  0000                    dtemp0:	blk	1
 27934  0001                    dtemp1:	blk	1



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