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1 ;=============================================================================
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2 ;
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3 ; File varargs.inc
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4 ;
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5 ; Utilities to pass multiple arguments in compact code stream.
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6 ;
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7 ; Copyright (c) 2011, JD Gascuel, HeinrichsWeikamp, all right reserved.
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8 ;=============================================================================
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9 ; HISTORY
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10 ; 2011-05-27 : [jDG] Creation.
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11 ;
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12
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604
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13 VARARGS_BEGIN macro
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14 movff TOSL, TBLPTRL
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15 movff TOSH, TBLPTRH
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16 movff TOSU, TBLPTRU
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17 endm
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0
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18
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604
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19 VARARGS_GET8 macro register
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20 tblrd*+
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21 movff TABLAT, register
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22 endm
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0
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23
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604
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24 VARARGS_GET16 macro register
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25 tblrd*+
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26 movff TABLAT, register+0
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27 tblrd*+
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28 movff TABLAT, register+1
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29 endm
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0
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30
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604
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31 VARARGS_GET24 macro register
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32 tblrd*+
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33 movff TABLAT, register+0
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34 tblrd*+
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35 movff TABLAT, register+1
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36 tblrd*+
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37 movff TABLAT, register+2
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38 endm
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0
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39
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604
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40 VARARGS_ALIGN macro
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41 local no_tblptr_align
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0
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42
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604
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43 btfss TBLPTRL,0
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44 bra no_tblptr_align
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45 incf TBLPTRL
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46 movlw 0
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47 addwfc TBLPTRH
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48 addwfc TBLPTRU
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0
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49 no_tblptr_align:
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604
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50 endm
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0
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51
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52 VARARGS_END macro
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604
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53 ; compute string length (modulo 256):
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54 movf TOSL,W
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55 subwf TBLPTRL,W
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0
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56
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604
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57 ; then 24 bit add to return address
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58 addwf TOSL,F
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59 movlw 0 ; clear WREG, but keep carry
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60 addwfc TOSH,F
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61 addwfc TOSU,F
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62 endm
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63
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