rev |
line source |
pascal@20458
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1 BEGIN { hold=0 }
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pascal@20458
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2 function isnum(n) { return match(n,/^[0-9+-]/) }
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pascal@20458
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3 {
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pascal@20458
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4 if (hold == 0) {
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pascal@20458
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5 s=$0
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pascal@20534
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6 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
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pascal@20543
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7 r=$2; kept=0
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pascal@20458
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8 hold=1; split($2,regs,","); next
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pascal@20458
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9 }
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pascal@20458
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10 if (/^ inc e?.[ix]/ || /^ dec e?.[ix]/) {
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pascal@20458
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11 hold=2; r=$2; next
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pascal@20458
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12 }
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pascal@20458
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13 if (/^ mov [abcds][ix],/ && ! /,.s/) {
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pascal@20458
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14 hold=3; split($2,regs,","); next
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pascal@20458
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15 }
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pascal@20458
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16 if (/^ movzx eax,ax$/) { hold=4; next }
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pascal@20544
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17 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
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pascal@20543
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18 split($0,regs,",")
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pascal@20543
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19 if (isnum(regs[2]) && regs[2] != 0 &&
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pascal@20543
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20 (regs[2] % 256) == 0) {
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pascal@20549
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21 hold=5; next
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pascal@20543
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22 }
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pascal@20543
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23 }
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pascal@20630
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24 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
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pascal@20630
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25 if (/^ mov cl,4$/) { hold=7; next }
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pascal@20630
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26 if (/^ cmp word ptr DGROUP:.*,0$/) {
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pascal@20630
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27 hold=8; split($2,regs,","); next
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pascal@20630
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28 }
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pascal@20458
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29 }
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pascal@20458
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30 else if (hold == 1) {
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pascal@20543
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31 if (/^ ;/) { line[kept++]=$0; next }
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pascal@20458
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32 hold=0; split($2,args,","); op=""
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pascal@20458
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33 if ($1 == "add") op="+"
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pascal@20458
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34 if ($1 == "sub") op="-"
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pascal@20543
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35 if (op != "" && regs[1] == args[1]) {
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pascal@20543
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36 if (isnum(args[2])) {
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pascal@20630
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37 for (i = kept++; i > 0; i--) line[i] = line[i-1]
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pascal@20630
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38 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
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pascal@20630
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39 hold=10; next
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pascal@20543
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40 }
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pascal@20543
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41 line[kept++]=$0
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pascal@20543
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42 hold=1
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pascal@20458
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43 next
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pascal@20458
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44 }
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pascal@20520
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45 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
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pascal@20520
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46 print " xchg " r
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pascal@20520
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47 }
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pascal@20543
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48 else print s
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pascal@20543
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49 for (i = 0; i < kept; i++) print line[i]; kept=0
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pascal@20458
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50 }
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pascal@20458
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51 else if (hold == 2) {
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pascal@20458
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52 hold=0; split($2,args,","); print s
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pascal@20458
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53 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
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pascal@20458
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54 }
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pascal@20458
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55 else if (hold == 3) {
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pascal@20458
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56 hold=0
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pascal@20542
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57 if (/^ add [abcds][ix],/) {
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pascal@20458
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58 split($2,regs2,",")
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pascal@20458
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59 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
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pascal@20549
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60 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
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pascal@20458
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61 print t; print s; next
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pascal@20458
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62 }
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pascal@20458
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63 }
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pascal@20458
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64 print s
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pascal@20458
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65 }
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pascal@20458
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66 else if (hold == 4) {
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pascal@20458
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67 hold=0
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pascal@20458
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68 if (/^ push eax$/) {
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pascal@20458
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69 print " push 0"; print " push ax"; next
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pascal@20458
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70 } else { print s }
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pascal@20458
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71 }
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pascal@20543
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72 else if (hold == 5) {
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pascal@20543
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73 hold=0
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pascal@20543
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74 if ($1 == "jae" || $1 == "jb") {
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pascal@20544
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75 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
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pascal@20543
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76 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
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pascal@20543
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77 s = s "/256"
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pascal@20543
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78 }
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pascal@20543
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79 print s
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pascal@20543
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80 }
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pascal@20630
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81 else if (hold == 6) {
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pascal@20630
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82 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
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pascal@20630
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83 line[kept++]=$0
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pascal@20630
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84 next
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pascal@20630
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85 }
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pascal@20630
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86 p=$0
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pascal@20630
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87 if (/^ movzx eax,ax$/) {
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pascal@20630
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88 s=" mov eax,cs"; p=""
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pascal@20630
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89 }
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pascal@20630
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90 print s
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pascal@20630
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91 for (i = 0; i < kept; i++) print line[i]; kept=0
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pascal@20630
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92 if (p != "") print p
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pascal@20630
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93 hold=0; next
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pascal@20630
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94 }
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pascal@20630
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95 else if (hold == 7) {
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pascal@20458
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96 hold=0
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pascal@20520
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97 if (/^ call near ptr N_LXURSH@$/) {
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pascal@20520
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98 print " extrn N_LXURSH@4:near"
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pascal@20520
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99 print " call near ptr N_LXURSH@4"
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pascal@20520
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100 next
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pascal@20520
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101 }
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pascal@20528
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102 if (/^ call near ptr N_LXLSH@$/) {
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pascal@20528
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103 print " extrn N_LXLSH@4:near"
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pascal@20528
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104 print " call near ptr N_LXLSH@4"
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pascal@20528
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105 next
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pascal@20528
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106 }
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pascal@20520
|
107 print s
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pascal@20458
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108 }
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pascal@20630
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109 else if (hold == 8) {
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pascal@20630
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110 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
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pascal@20630
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111 hold=0
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pascal@20630
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112 print s
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pascal@20630
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113 }
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pascal@20630
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114 else if (hold == 9) {
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pascal@20630
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115 hold=0; split($2,args,",")
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pascal@20630
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116 if (/^ mov ax,/ && args[2] == regs[1]) {
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pascal@20630
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117 print; print " or ax,ax"; print p; next
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pascal@20630
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118 }
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pascal@20630
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119 print s; print p;
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pascal@20630
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120 }
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pascal@20630
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121 else if (hold == 10) {
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pascal@20630
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122 hold=0
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pascal@20630
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123 if (/^ mov [sd]i,ax$/) {
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pascal@20630
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124 split($2,args,",")
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pascal@20630
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125 for (i = 0; i < kept; i++) {
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pascal@20630
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126 sub(/ax/,args[1],line[i]); print line[i]
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pascal@20630
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127 }
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pascal@20630
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128 next
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pascal@20630
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129 }
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pascal@20630
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130 for (i = 0; i < kept; i++) print line[i]
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pascal@20630
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131 }
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pascal@20458
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132 s=$0
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pascal@20458
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133 # These optimisation may break ZF or CF
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pascal@20485
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134 if (/^ sub sp,2$/) { print " push ax"; next }
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pascal@20485
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135 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
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pascal@20485
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136 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
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pascal@20458
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137 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
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pascal@20458
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138 sub(/mov/,"and",s); print s; next # slower
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pascal@20458
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139 }
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pascal@20458
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140 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
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pascal@20458
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141 sub(/mov/,"or",s); print s; next # slower
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pascal@20458
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142 }
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pascal@20458
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143 if (/^ or .*,0$/ || /^ and .*,-1$/) next
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pascal@20458
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144 if (/^ or [abcd]x,/) {
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pascal@20458
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145 split($2,args,",")
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pascal@20458
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146 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
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pascal@20458
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147 print " or " substr(args[1],1,1) "l," args[2]; next
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pascal@20458
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148 }
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pascal@20458
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149 }
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pascal@20458
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150 if (/^ and [abcd]x,/) {
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pascal@20458
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151 split($2,args,",")
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pascal@20459
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152 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
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pascal@20458
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153 print " and " substr(args[1],1,1) "l," args[2]; next
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pascal@20458
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154 }
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pascal@20458
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155 }
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pascal@20458
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156 if (/^ or e[abcd]x,/) {
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pascal@20458
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157 split($2,args,",")
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pascal@20458
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158 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
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159 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
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pascal@20458
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160 print " or " substr(args[1],2,1) "l," args[2]; next
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pascal@20458
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161 }
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pascal@20458
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162 }
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pascal@20458
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163 if (/^ and e[abcd]x,/) {
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pascal@20458
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164 split($2,args,",")
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pascal@20458
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165 if (args[2] == "large") { args[2] = $3 }
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pascal@20459
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166 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
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pascal@20458
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167 print " and " substr(args[1],2,1) "l," args[2]; next
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pascal@20458
|
168 }
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pascal@20458
|
169 }
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pascal@20458
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170 if (/^ or e[abcds][ix],/) {
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pascal@20458
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171 split($2,args,",")
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pascal@20458
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172 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
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173 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
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pascal@20458
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174 print " or " substr(args[1],2) "," args[2]; next
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pascal@20458
|
175 }
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pascal@20458
|
176 }
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pascal@20458
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177 if (/^ and e[abcds][ix],/) {
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pascal@20458
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178 split($2,args,",")
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pascal@20458
|
179 if (args[2] == "large") { args[2] = $3 }
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pascal@20459
|
180 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
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pascal@20458
|
181 print " and " substr(args[1],2) "," args[2]; next
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pascal@20458
|
182 }
|
pascal@20458
|
183 }
|
pascal@20543
|
184 if (/^ add word ptr/ || /^ sub word ptr/ ||
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pascal@20544
|
185 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
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pascal@20542
|
186 split($0,args,",")
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pascal@20542
|
187 if (isnum(args[2]) && (args[2] % 256 == 0)) {
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pascal@20544
|
188 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
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pascal@20543
|
189 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
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pascal@20542
|
190 print s "/256"; next
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pascal@20542
|
191 }
|
pascal@20542
|
192 }
|
pascal@20546
|
193 if (/^ add dword ptr/ || /^ sub dword ptr/) {
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pascal@20458
|
194 split($0,args,",")
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pascal@20543
|
195 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
|
196 if (isnum(args[2])) {
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pascal@20546
|
197 if (args[2] % 16777216 == 0) {
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pascal@20546
|
198 sub(/dword/,"byte",s)
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pascal@20543
|
199 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
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pascal@20458
|
200 print s "/16777216"; next
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pascal@20458
|
201 }
|
pascal@20458
|
202 if (args[2] % 65536 == 0) {
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pascal@20546
|
203 sub(/dword/,"word",s)
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pascal@20543
|
204 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
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pascal@20458
|
205 print s "/65536"; next
|
pascal@20458
|
206 }
|
pascal@20458
|
207 }
|
pascal@20458
|
208 }
|
pascal@20458
|
209 if (/^ mov e.x,/) {
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pascal@20458
|
210 split($2,args,",")
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pascal@20458
|
211 r=args[1]
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pascal@20458
|
212 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
|
213 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
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pascal@20458
|
214 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
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pascal@20458
|
215 print " xor " r "," r
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pascal@20458
|
216 if (args[2] == 0) next
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pascal@20458
|
217 x=" mov " substr(r,2,1)
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pascal@20458
|
218 if (args[2] % 256 == 0) {
|
pascal@20458
|
219 print x "h," args[2] "/256"
|
pascal@20458
|
220 }
|
pascal@20458
|
221 else { print x "l," args[2] }
|
pascal@20458
|
222 next
|
pascal@20458
|
223 }
|
pascal@20458
|
224 }
|
pascal@20458
|
225 }
|
pascal@20458
|
226 print
|
pascal@20458
|
227 }
|