rev |
line source |
pascal@20458
|
1 BEGIN { hold=0 }
|
pascal@20458
|
2 function isnum(n) { return match(n,/^[0-9+-]/) }
|
pascal@20458
|
3 {
|
pascal@20632
|
4 sub(/segment word public/,"segment byte public")
|
pascal@20634
|
5
|
pascal@20458
|
6 if (hold == 0) {
|
pascal@20458
|
7 s=$0
|
pascal@20534
|
8 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
|
pascal@20543
|
9 r=$2; kept=0
|
pascal@20458
|
10 hold=1; split($2,regs,","); next
|
pascal@20458
|
11 }
|
pascal@20458
|
12 if (/^ inc e?.[ix]/ || /^ dec e?.[ix]/) {
|
pascal@20458
|
13 hold=2; r=$2; next
|
pascal@20458
|
14 }
|
pascal@20458
|
15 if (/^ mov [abcds][ix],/ && ! /,.s/) {
|
pascal@20458
|
16 hold=3; split($2,regs,","); next
|
pascal@20458
|
17 }
|
pascal@20458
|
18 if (/^ movzx eax,ax$/) { hold=4; next }
|
pascal@20544
|
19 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
|
pascal@20543
|
20 split($0,regs,",")
|
pascal@20543
|
21 if (isnum(regs[2]) && regs[2] != 0 &&
|
pascal@20543
|
22 (regs[2] % 256) == 0) {
|
pascal@20549
|
23 hold=5; next
|
pascal@20543
|
24 }
|
pascal@20543
|
25 }
|
pascal@20630
|
26 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
|
pascal@20630
|
27 if (/^ mov cl,4$/) { hold=7; next }
|
pascal@20630
|
28 if (/^ cmp word ptr DGROUP:.*,0$/) {
|
pascal@20630
|
29 hold=8; split($2,regs,","); next
|
pascal@20630
|
30 }
|
pascal@20634
|
31 if (/^ cbw/) { hold=11; kept=0; next }
|
pascal@20634
|
32 if (/^ add [abcds][ix],2$/) {
|
pascal@20634
|
33 split($2,regs,","); hold=12; next
|
pascal@20634
|
34 }
|
pascal@20634
|
35 if (/^ sub [abcds][ix],2$/) {
|
pascal@20634
|
36 split($2,regs,","); hold=13; next
|
pascal@20634
|
37 }
|
pascal@20458
|
38 }
|
pascal@20458
|
39 else if (hold == 1) {
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pascal@20543
|
40 if (/^ ;/) { line[kept++]=$0; next }
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pascal@20458
|
41 hold=0; split($2,args,","); op=""
|
pascal@20458
|
42 if ($1 == "add") op="+"
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pascal@20458
|
43 if ($1 == "sub") op="-"
|
pascal@20751
|
44 if ($1 == "inc") { op="+"; args[2]="1"; }
|
pascal@20751
|
45 if ($1 == "dec") { op="-"; args[2]="1"; }
|
pascal@20543
|
46 if (op != "" && regs[1] == args[1]) {
|
pascal@20543
|
47 if (isnum(args[2])) {
|
pascal@20630
|
48 for (i = kept++; i > 0; i--) line[i] = line[i-1]
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pascal@20630
|
49 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
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pascal@20630
|
50 hold=10; next
|
pascal@20543
|
51 }
|
pascal@20543
|
52 line[kept++]=$0
|
pascal@20543
|
53 hold=1
|
pascal@20458
|
54 next
|
pascal@20458
|
55 }
|
pascal@20520
|
56 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
|
pascal@20520
|
57 print " xchg " r
|
pascal@20520
|
58 }
|
pascal@20543
|
59 else print s
|
pascal@20543
|
60 for (i = 0; i < kept; i++) print line[i]; kept=0
|
pascal@20458
|
61 }
|
pascal@20458
|
62 else if (hold == 2) {
|
pascal@20458
|
63 hold=0; split($2,args,","); print s
|
pascal@20458
|
64 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
|
pascal@20458
|
65 }
|
pascal@20458
|
66 else if (hold == 3) {
|
pascal@20458
|
67 hold=0
|
pascal@20542
|
68 if (/^ add [abcds][ix],/) {
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pascal@20458
|
69 split($2,regs2,",")
|
pascal@20458
|
70 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
|
pascal@20549
|
71 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
|
pascal@20458
|
72 print t; print s; next
|
pascal@20458
|
73 }
|
pascal@20458
|
74 }
|
pascal@20458
|
75 print s
|
pascal@20458
|
76 }
|
pascal@20458
|
77 else if (hold == 4) {
|
pascal@20458
|
78 hold=0
|
pascal@20458
|
79 if (/^ push eax$/) {
|
pascal@20458
|
80 print " push 0"; print " push ax"; next
|
pascal@20458
|
81 } else { print s }
|
pascal@20458
|
82 }
|
pascal@20543
|
83 else if (hold == 5) {
|
pascal@20543
|
84 hold=0
|
pascal@20543
|
85 if ($1 == "jae" || $1 == "jb") {
|
pascal@20544
|
86 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
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pascal@20543
|
87 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
|
pascal@20543
|
88 s = s "/256"
|
pascal@20543
|
89 }
|
pascal@20543
|
90 print s
|
pascal@20543
|
91 }
|
pascal@20630
|
92 else if (hold == 6) {
|
pascal@20630
|
93 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
|
pascal@20630
|
94 line[kept++]=$0
|
pascal@20630
|
95 next
|
pascal@20630
|
96 }
|
pascal@20630
|
97 p=$0
|
pascal@20630
|
98 if (/^ movzx eax,ax$/) {
|
pascal@20630
|
99 s=" mov eax,cs"; p=""
|
pascal@20630
|
100 }
|
pascal@20630
|
101 print s
|
pascal@20630
|
102 for (i = 0; i < kept; i++) print line[i]; kept=0
|
pascal@20630
|
103 if (p != "") print p
|
pascal@20630
|
104 hold=0; next
|
pascal@20630
|
105 }
|
pascal@20630
|
106 else if (hold == 7) {
|
pascal@20458
|
107 hold=0
|
pascal@20520
|
108 if (/^ call near ptr N_LXURSH@$/) {
|
pascal@20520
|
109 print " extrn N_LXURSH@4:near"
|
pascal@20520
|
110 print " call near ptr N_LXURSH@4"
|
pascal@20520
|
111 next
|
pascal@20520
|
112 }
|
pascal@20528
|
113 if (/^ call near ptr N_LXLSH@$/) {
|
pascal@20528
|
114 print " extrn N_LXLSH@4:near"
|
pascal@20528
|
115 print " call near ptr N_LXLSH@4"
|
pascal@20528
|
116 next
|
pascal@20528
|
117 }
|
pascal@20520
|
118 print s
|
pascal@20458
|
119 }
|
pascal@20630
|
120 else if (hold == 8) {
|
pascal@20630
|
121 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
|
pascal@20630
|
122 hold=0
|
pascal@20630
|
123 print s
|
pascal@20630
|
124 }
|
pascal@20630
|
125 else if (hold == 9) {
|
pascal@20630
|
126 hold=0; split($2,args,",")
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pascal@20630
|
127 if (/^ mov ax,/ && args[2] == regs[1]) {
|
pascal@20630
|
128 print; print " or ax,ax"; print p; next
|
pascal@20630
|
129 }
|
pascal@20630
|
130 print s; print p;
|
pascal@20630
|
131 }
|
pascal@20630
|
132 else if (hold == 10) {
|
pascal@20751
|
133 split($2,args,","); op=""
|
pascal@20751
|
134 if ($1 == "add") op="+"
|
pascal@20751
|
135 if ($1 == "sub") op="-"
|
pascal@20751
|
136 if ($1 == "inc") { op="+"; args[2]="1"; }
|
pascal@20751
|
137 if ($1 == "dec") { op="-"; args[2]="1"; }
|
pascal@20751
|
138 if (op != "" && isnum(args[2])) {
|
pascal@20751
|
139 split(line[0],reg,",")
|
pascal@20751
|
140 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
|
pascal@20751
|
141 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
|
pascal@20751
|
142 next
|
pascal@20751
|
143 }
|
pascal@20751
|
144 }
|
pascal@20630
|
145 hold=0
|
pascal@20630
|
146 if (/^ mov [sd]i,ax$/) {
|
pascal@20630
|
147 split($2,args,",")
|
pascal@20630
|
148 for (i = 0; i < kept; i++) {
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pascal@20630
|
149 sub(/ax/,args[1],line[i]); print line[i]
|
pascal@20630
|
150 }
|
pascal@20630
|
151 next
|
pascal@20630
|
152 }
|
pascal@20630
|
153 for (i = 0; i < kept; i++) print line[i]
|
pascal@20630
|
154 }
|
pascal@20634
|
155 else if (hold == 11) {
|
pascal@20634
|
156 if (/^ inc ax$/ || /^ dec ax$/) {
|
pascal@20634
|
157 line[kept++]=$0; next
|
pascal@20634
|
158 }
|
pascal@20634
|
159 split($2,args,",")
|
pascal@20634
|
160 if (/^ mov cl,/) {
|
pascal@20634
|
161 split($2,args,",")
|
pascal@20634
|
162 if (args[2] >= 8) {
|
pascal@20634
|
163 line[kept++]=$0; next
|
pascal@20634
|
164 }
|
pascal@20634
|
165 }
|
pascal@20634
|
166 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
|
pascal@20634
|
167 print " cbw "
|
pascal@20634
|
168 }
|
pascal@20634
|
169 for (i = 0; i < kept; i++) print line[i]
|
pascal@20634
|
170 hold=kept=0
|
pascal@20634
|
171 }
|
pascal@20634
|
172 else if (hold == 12) {
|
pascal@20634
|
173 hold=0
|
pascal@20634
|
174 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
|
pascal@20634
|
175 print " inc " regs[1]
|
pascal@20634
|
176 print " inc " regs[1]
|
pascal@20634
|
177 }
|
pascal@20634
|
178 else print " add " regs[1] ",2"
|
pascal@20634
|
179 }
|
pascal@20634
|
180 else if (hold == 13) {
|
pascal@20634
|
181 hold=0
|
pascal@20634
|
182 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
|
pascal@20634
|
183 print " dec " regs[1]
|
pascal@20634
|
184 print " dec " regs[1]
|
pascal@20634
|
185 }
|
pascal@20634
|
186 else print " sub " regs[1] ",2"
|
pascal@20634
|
187 }
|
pascal@20458
|
188 s=$0
|
pascal@20458
|
189 # These optimisation may break ZF or CF
|
pascal@20485
|
190 if (/^ sub sp,2$/) { print " push ax"; next }
|
pascal@20485
|
191 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
|
pascal@20485
|
192 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
|
pascal@20458
|
193 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
|
pascal@20458
|
194 sub(/mov/,"and",s); print s; next # slower
|
pascal@20458
|
195 }
|
pascal@20458
|
196 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
|
pascal@20458
|
197 sub(/mov/,"or",s); print s; next # slower
|
pascal@20458
|
198 }
|
pascal@20458
|
199 if (/^ or .*,0$/ || /^ and .*,-1$/) next
|
pascal@20458
|
200 if (/^ or [abcd]x,/) {
|
pascal@20458
|
201 split($2,args,",")
|
pascal@20458
|
202 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
|
pascal@20458
|
203 print " or " substr(args[1],1,1) "l," args[2]; next
|
pascal@20458
|
204 }
|
pascal@20458
|
205 }
|
pascal@20458
|
206 if (/^ and [abcd]x,/) {
|
pascal@20458
|
207 split($2,args,",")
|
pascal@20459
|
208 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
|
pascal@20458
|
209 print " and " substr(args[1],1,1) "l," args[2]; next
|
pascal@20458
|
210 }
|
pascal@20458
|
211 }
|
pascal@20458
|
212 if (/^ or e[abcd]x,/) {
|
pascal@20458
|
213 split($2,args,",")
|
pascal@20458
|
214 if (args[2] == "large") { args[2] = $3 }
|
pascal@20458
|
215 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
|
pascal@20458
|
216 print " or " substr(args[1],2,1) "l," args[2]; next
|
pascal@20458
|
217 }
|
pascal@20458
|
218 }
|
pascal@20458
|
219 if (/^ and e[abcd]x,/) {
|
pascal@20458
|
220 split($2,args,",")
|
pascal@20458
|
221 if (args[2] == "large") { args[2] = $3 }
|
pascal@20459
|
222 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
|
pascal@20458
|
223 print " and " substr(args[1],2,1) "l," args[2]; next
|
pascal@20458
|
224 }
|
pascal@20458
|
225 }
|
pascal@20458
|
226 if (/^ or e[abcds][ix],/) {
|
pascal@20458
|
227 split($2,args,",")
|
pascal@20458
|
228 if (args[2] == "large") { args[2] = $3 }
|
pascal@20458
|
229 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
|
pascal@20458
|
230 print " or " substr(args[1],2) "," args[2]; next
|
pascal@20458
|
231 }
|
pascal@20458
|
232 }
|
pascal@20458
|
233 if (/^ and e[abcds][ix],/) {
|
pascal@20458
|
234 split($2,args,",")
|
pascal@20458
|
235 if (args[2] == "large") { args[2] = $3 }
|
pascal@20459
|
236 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
|
pascal@20458
|
237 print " and " substr(args[1],2) "," args[2]; next
|
pascal@20458
|
238 }
|
pascal@20458
|
239 }
|
pascal@20543
|
240 if (/^ add word ptr/ || /^ sub word ptr/ ||
|
pascal@20544
|
241 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
|
pascal@20542
|
242 split($0,args,",")
|
pascal@20542
|
243 if (isnum(args[2]) && (args[2] % 256 == 0)) {
|
pascal@20544
|
244 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
|
pascal@20543
|
245 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
|
pascal@20542
|
246 print s "/256"; next
|
pascal@20542
|
247 }
|
pascal@20542
|
248 }
|
pascal@20546
|
249 if (/^ add dword ptr/ || /^ sub dword ptr/) {
|
pascal@20458
|
250 split($0,args,",")
|
pascal@20543
|
251 if (args[2] == "large") { args[2] = $3 }
|
pascal@20458
|
252 if (isnum(args[2])) {
|
pascal@20546
|
253 if (args[2] % 16777216 == 0) {
|
pascal@20546
|
254 sub(/dword/,"byte",s)
|
pascal@20543
|
255 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
|
pascal@20458
|
256 print s "/16777216"; next
|
pascal@20458
|
257 }
|
pascal@20458
|
258 if (args[2] % 65536 == 0) {
|
pascal@20546
|
259 sub(/dword/,"word",s)
|
pascal@20543
|
260 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
|
pascal@20458
|
261 print s "/65536"; next
|
pascal@20458
|
262 }
|
pascal@20458
|
263 }
|
pascal@20458
|
264 }
|
pascal@20458
|
265 if (/^ mov e.x,/) {
|
pascal@20458
|
266 split($2,args,",")
|
pascal@20458
|
267 r=args[1]
|
pascal@20458
|
268 if (args[2] == "large") { args[2] = $3 }
|
pascal@20458
|
269 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
|
pascal@20458
|
270 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
|
pascal@20458
|
271 print " xor " r "," r
|
pascal@20458
|
272 if (args[2] == 0) next
|
pascal@20458
|
273 x=" mov " substr(r,2,1)
|
pascal@20458
|
274 if (args[2] % 256 == 0) {
|
pascal@20458
|
275 print x "h," args[2] "/256"
|
pascal@20458
|
276 }
|
pascal@20458
|
277 else { print x "l," args[2] }
|
pascal@20458
|
278 next
|
pascal@20458
|
279 }
|
pascal@20458
|
280 }
|
pascal@20458
|
281 }
|
pascal@20458
|
282 print
|
pascal@20458
|
283 }
|