Stack Overflow Pushing Return Address of Interrupt PIC 16F628A

If I understand correct; you want to set bit 3 of PORTB to 1 whenever the bit 0 or bit 7 goes high, but bit 0 is superior I mean it has higher priority over the bit 7. In the light of this information we can make the truth table as following:

But my question here is: What is the role of bit 7 if it doesn't have any affect on the output since the bit 0 override it in any case? Please let me know that.

So according to the table the output will set to 1 only if the higher priority interrupt input (RB0) is 1. For the rest the output remains 0. Correct me if I miss something. Let's implement this logic into your existing code. By the way I've also noted that you've set the RB Port change interrupt but didn't service it. I will only write the related part with some optimizations.

INTERRUPCIONES
;     BCF       INTCON,GIE    ; No need to do this since the hardware does this automatically
     BTFSS     INTCON,INTF
     GOTO      DONE           ; Not INTF interrupt simply skip
     BCF       INTCON,INTF    ; Better clear this flag as soon as you start to service it
     BSF       PORTB,0        ; High priority input goes 1 hence no more questions to setting the output as 1

     ; Check for PORTB on change interrupt
     BTFSS     INTCON,RBIF
     GOTO      DONE           ; Not RBIF interrupt simply skip
     BCF       INTCON,RBIF    ; First of all clear the interrupt flag to avoid unintended recursive interrupts
     BTFSS     PORTB,0        ; Check if the higher priority input is 1
     GOTO      DONE           ; Higher priority input is not 1 so we ignore this change
     BCF       INTCON,RBIF    ; Better clear this flag as soon as you start to service it
     CALL      TEMPERATURA    ; Calling as a subroutine is supported up to 8 levels by this micro
DONE
;     BSF       INTCON,GIE    ; Don't do it, because the RETFIE instruction does it for you
     RETFIE

; If the program reaches here, the high priority input is 1.
; Now we need to check if the low priority input is 1 as well.
TEMPERATURA
     BTFSC     PORTB,7
     BSF       PORTB,3
;     BSF       INTCON,GIE    ; Not needed since we return to the ISR routine and RETFIE will do it for us
     RETURN

And finally let's simplify the above ode by eliminating unnecessary code lines:

INTERRUPCIONES
     BTFSS     INTCON,INTF
     GOTO      DONE           ; Not INTF interrupt simply skip
     BCF       INTCON,INTF    ; Better clear this flag as soon as you start to service it
     BSF       PORTB,0        ; High priority input goes 1 hence no more questions to setting the output as 1

     ; Check for PORTB on change interrupt
     BTFSS     INTCON,RBIF
     GOTO      DONE           ; Not RBIF interrupt simply skip
     BCF       INTCON,RBIF    ; First of all clear the interrupt flag to avoid unintended recursive interrupts
     BTFSS     PORTB,0        ; Check if the higher priority input is 1
     GOTO      DONE           ; Higher priority input is not 1 so we ignore this change
     BCF       INTCON,RBIF    ; Better clear this flag as soon as you start to service it
     CALL      TEMPERATURA    ; Calling as a subroutine is supported up to 8 levels by this micro
DONE
     RETFIE

; If the program reaches here, the high priority input is 1.
; Now we need to check if the low priority input is 1 as well.
TEMPERATURA
     BTFSC     PORTB,7
     BSF       PORTB,3
     RETURN