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@20632
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4 sub(/segment word public/,"segment byte public")
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pascal@20458
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5 if (hold == 0) {
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pascal@20458
|
6 s=$0
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pascal@20534
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7 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
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pascal@20543
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8 r=$2; kept=0
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pascal@20458
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9 hold=1; split($2,regs,","); next
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pascal@20458
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10 }
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pascal@20458
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11 if (/^ inc e?.[ix]/ || /^ dec e?.[ix]/) {
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pascal@20458
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12 hold=2; r=$2; next
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pascal@20458
|
13 }
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pascal@20458
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14 if (/^ mov [abcds][ix],/ && ! /,.s/) {
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pascal@20458
|
15 hold=3; split($2,regs,","); next
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pascal@20458
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16 }
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pascal@20458
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17 if (/^ movzx eax,ax$/) { hold=4; next }
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pascal@20544
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18 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
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pascal@20543
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19 split($0,regs,",")
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pascal@20543
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20 if (isnum(regs[2]) && regs[2] != 0 &&
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pascal@20543
|
21 (regs[2] % 256) == 0) {
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pascal@20549
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22 hold=5; next
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pascal@20543
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23 }
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pascal@20543
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24 }
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pascal@20630
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25 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
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pascal@20630
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26 if (/^ mov cl,4$/) { hold=7; next }
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pascal@20630
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27 if (/^ cmp word ptr DGROUP:.*,0$/) {
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pascal@20630
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28 hold=8; split($2,regs,","); next
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pascal@20630
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29 }
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pascal@20458
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30 }
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pascal@20458
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31 else if (hold == 1) {
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pascal@20543
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32 if (/^ ;/) { line[kept++]=$0; next }
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pascal@20458
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33 hold=0; split($2,args,","); op=""
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pascal@20458
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34 if ($1 == "add") op="+"
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pascal@20458
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35 if ($1 == "sub") op="-"
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pascal@20543
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36 if (op != "" && regs[1] == args[1]) {
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pascal@20543
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37 if (isnum(args[2])) {
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pascal@20630
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38 for (i = kept++; i > 0; i--) line[i] = line[i-1]
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pascal@20630
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39 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
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pascal@20630
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40 hold=10; next
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pascal@20543
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41 }
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pascal@20543
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42 line[kept++]=$0
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pascal@20543
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43 hold=1
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pascal@20458
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44 next
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pascal@20458
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45 }
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pascal@20520
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46 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
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pascal@20520
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47 print " xchg " r
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pascal@20520
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48 }
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pascal@20543
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49 else print s
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pascal@20543
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50 for (i = 0; i < kept; i++) print line[i]; kept=0
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pascal@20458
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51 }
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pascal@20458
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52 else if (hold == 2) {
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pascal@20458
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53 hold=0; split($2,args,","); print s
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pascal@20458
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54 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
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pascal@20458
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55 }
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pascal@20458
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56 else if (hold == 3) {
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pascal@20458
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57 hold=0
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pascal@20542
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58 if (/^ add [abcds][ix],/) {
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pascal@20458
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59 split($2,regs2,",")
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pascal@20458
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60 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
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pascal@20549
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61 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
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pascal@20458
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62 print t; print s; next
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pascal@20458
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63 }
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pascal@20458
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64 }
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pascal@20458
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65 print s
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pascal@20458
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66 }
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pascal@20458
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67 else if (hold == 4) {
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pascal@20458
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68 hold=0
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pascal@20458
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69 if (/^ push eax$/) {
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pascal@20458
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70 print " push 0"; print " push ax"; next
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pascal@20458
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71 } else { print s }
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pascal@20458
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72 }
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pascal@20543
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73 else if (hold == 5) {
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pascal@20543
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74 hold=0
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pascal@20543
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75 if ($1 == "jae" || $1 == "jb") {
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pascal@20544
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76 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
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pascal@20543
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77 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
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pascal@20543
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78 s = s "/256"
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pascal@20543
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79 }
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pascal@20543
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80 print s
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pascal@20543
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81 }
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pascal@20630
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82 else if (hold == 6) {
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pascal@20630
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83 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
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pascal@20630
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84 line[kept++]=$0
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pascal@20630
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85 next
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pascal@20630
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86 }
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pascal@20630
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87 p=$0
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pascal@20630
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88 if (/^ movzx eax,ax$/) {
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pascal@20630
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89 s=" mov eax,cs"; p=""
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pascal@20630
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90 }
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pascal@20630
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91 print s
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pascal@20630
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92 for (i = 0; i < kept; i++) print line[i]; kept=0
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pascal@20630
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93 if (p != "") print p
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pascal@20630
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94 hold=0; next
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pascal@20630
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95 }
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pascal@20630
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96 else if (hold == 7) {
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pascal@20458
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97 hold=0
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pascal@20520
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98 if (/^ call near ptr N_LXURSH@$/) {
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pascal@20520
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99 print " extrn N_LXURSH@4:near"
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pascal@20520
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100 print " call near ptr N_LXURSH@4"
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pascal@20520
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101 next
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pascal@20520
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102 }
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pascal@20528
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103 if (/^ call near ptr N_LXLSH@$/) {
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pascal@20528
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104 print " extrn N_LXLSH@4:near"
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pascal@20528
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105 print " call near ptr N_LXLSH@4"
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pascal@20528
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106 next
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pascal@20528
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107 }
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pascal@20520
|
108 print s
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pascal@20458
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109 }
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pascal@20630
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110 else if (hold == 8) {
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pascal@20630
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111 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
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pascal@20630
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112 hold=0
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pascal@20630
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113 print s
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pascal@20630
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114 }
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pascal@20630
|
115 else if (hold == 9) {
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pascal@20630
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116 hold=0; split($2,args,",")
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pascal@20630
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117 if (/^ mov ax,/ && args[2] == regs[1]) {
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pascal@20630
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118 print; print " or ax,ax"; print p; next
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pascal@20630
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119 }
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pascal@20630
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120 print s; print p;
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pascal@20630
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121 }
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pascal@20630
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122 else if (hold == 10) {
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pascal@20630
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123 hold=0
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pascal@20630
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124 if (/^ mov [sd]i,ax$/) {
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pascal@20630
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125 split($2,args,",")
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pascal@20630
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126 for (i = 0; i < kept; i++) {
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pascal@20630
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127 sub(/ax/,args[1],line[i]); print line[i]
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pascal@20630
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128 }
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pascal@20630
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129 next
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pascal@20630
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130 }
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pascal@20630
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131 for (i = 0; i < kept; i++) print line[i]
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pascal@20630
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132 }
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pascal@20458
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133 s=$0
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pascal@20458
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134 # These optimisation may break ZF or CF
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pascal@20485
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135 if (/^ sub sp,2$/) { print " push ax"; next }
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pascal@20485
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136 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
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pascal@20485
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137 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
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pascal@20458
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138 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
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pascal@20458
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139 sub(/mov/,"and",s); print s; next # slower
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pascal@20458
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140 }
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pascal@20458
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141 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
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pascal@20458
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142 sub(/mov/,"or",s); print s; next # slower
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pascal@20458
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143 }
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pascal@20458
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144 if (/^ or .*,0$/ || /^ and .*,-1$/) next
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pascal@20458
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145 if (/^ or [abcd]x,/) {
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pascal@20458
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146 split($2,args,",")
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pascal@20458
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147 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
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pascal@20458
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148 print " or " substr(args[1],1,1) "l," args[2]; next
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pascal@20458
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149 }
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pascal@20458
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150 }
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pascal@20458
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151 if (/^ and [abcd]x,/) {
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pascal@20458
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152 split($2,args,",")
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pascal@20459
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153 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
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pascal@20458
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154 print " and " substr(args[1],1,1) "l," args[2]; next
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pascal@20458
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155 }
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pascal@20458
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156 }
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pascal@20458
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157 if (/^ or e[abcd]x,/) {
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pascal@20458
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158 split($2,args,",")
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pascal@20458
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159 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
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160 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
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pascal@20458
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161 print " or " substr(args[1],2,1) "l," args[2]; next
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pascal@20458
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162 }
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pascal@20458
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163 }
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pascal@20458
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164 if (/^ and e[abcd]x,/) {
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pascal@20458
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165 split($2,args,",")
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pascal@20458
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166 if (args[2] == "large") { args[2] = $3 }
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pascal@20459
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167 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
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pascal@20458
|
168 print " and " substr(args[1],2,1) "l," args[2]; next
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pascal@20458
|
169 }
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pascal@20458
|
170 }
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pascal@20458
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171 if (/^ or e[abcds][ix],/) {
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pascal@20458
|
172 split($2,args,",")
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pascal@20458
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173 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
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174 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
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pascal@20458
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175 print " or " substr(args[1],2) "," args[2]; next
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pascal@20458
|
176 }
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pascal@20458
|
177 }
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pascal@20458
|
178 if (/^ and e[abcds][ix],/) {
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pascal@20458
|
179 split($2,args,",")
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pascal@20458
|
180 if (args[2] == "large") { args[2] = $3 }
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pascal@20459
|
181 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
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pascal@20458
|
182 print " and " substr(args[1],2) "," args[2]; next
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pascal@20458
|
183 }
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pascal@20458
|
184 }
|
pascal@20543
|
185 if (/^ add word ptr/ || /^ sub word ptr/ ||
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pascal@20544
|
186 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
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pascal@20542
|
187 split($0,args,",")
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pascal@20542
|
188 if (isnum(args[2]) && (args[2] % 256 == 0)) {
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pascal@20544
|
189 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
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pascal@20543
|
190 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
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pascal@20542
|
191 print s "/256"; next
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pascal@20542
|
192 }
|
pascal@20542
|
193 }
|
pascal@20546
|
194 if (/^ add dword ptr/ || /^ sub dword ptr/) {
|
pascal@20458
|
195 split($0,args,",")
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pascal@20543
|
196 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
|
197 if (isnum(args[2])) {
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pascal@20546
|
198 if (args[2] % 16777216 == 0) {
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pascal@20546
|
199 sub(/dword/,"byte",s)
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pascal@20543
|
200 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
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pascal@20458
|
201 print s "/16777216"; next
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pascal@20458
|
202 }
|
pascal@20458
|
203 if (args[2] % 65536 == 0) {
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pascal@20546
|
204 sub(/dword/,"word",s)
|
pascal@20543
|
205 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
|
pascal@20458
|
206 print s "/65536"; next
|
pascal@20458
|
207 }
|
pascal@20458
|
208 }
|
pascal@20458
|
209 }
|
pascal@20458
|
210 if (/^ mov e.x,/) {
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pascal@20458
|
211 split($2,args,",")
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pascal@20458
|
212 r=args[1]
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pascal@20458
|
213 if (args[2] == "large") { args[2] = $3 }
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pascal@20458
|
214 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
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pascal@20458
|
215 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
|
pascal@20458
|
216 print " xor " r "," r
|
pascal@20458
|
217 if (args[2] == 0) next
|
pascal@20458
|
218 x=" mov " substr(r,2,1)
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pascal@20458
|
219 if (args[2] % 256 == 0) {
|
pascal@20458
|
220 print x "h," args[2] "/256"
|
pascal@20458
|
221 }
|
pascal@20458
|
222 else { print x "l," args[2] }
|
pascal@20458
|
223 next
|
pascal@20458
|
224 }
|
pascal@20458
|
225 }
|
pascal@20458
|
226 }
|
pascal@20458
|
227 print
|
pascal@20458
|
228 }
|