wok annotate linld/stuff/src/pipehole.awk @ rev 21754

Up firefox-official (67.0.3), tinyproxy (1.10.0)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Jun 19 17:26:14 2019 +0200 (2019-06-19)
parents 30270fe0d1b3
children 2373992ff751
rev   line source
pascal@21754 1 BEGIN { hold=0; is386=0; isload=0; isiso=0; istazboot=0; wascall=0; label="none"; xlabel="" }
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@21576 6 if (/^@.*:$/ || / endp$/) afterjmp=0
pascal@21729 7 if (/dword ptr/) is386=1
pascal@21754 8 if (/void load_initrd\(\)/) isload=3
pascal@21754 9 if (isload == 3) { # LOAD.LST
pascal@21754 10 if(/push di/ || /pop di/) next
pascal@21754 11 sub(/\[di/,"[bx")
pascal@21754 12 sub(/\di,/,"bx,")
pascal@21754 13 }
pascal@21750 14 if (/vid_mode = vid_mode/) isload=2
pascal@21750 15 if (isload == 2) { # LOAD.LST
pascal@21750 16 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 17 sub(/je/,"jcxz")
pascal@21750 18 if (/ax,word/) next
pascal@21750 19 sub(/,ax/,",cx")
pascal@21750 20 if (/version_string/) isload=0
pascal@21750 21 }
pascal@21729 22 if (/heap_top = _rm_buf/) isload=1
pascal@21750 23 if (isload == 1) { # LOAD.LST
pascal@21729 24 if (/mov al,byte ptr/ && is386) {
pascal@21729 25 print " movzx eax,byte ptr [si]"
pascal@21729 26 next
pascal@21729 27 }
pascal@21729 28 if (/ax,word ptr/) next
pascal@21729 29 if (/^ call/) isload=0
pascal@21729 30 }
pascal@21754 31 if (/CD001/) isiso=7
pascal@21754 32 if (isiso == 7) { # ISO9660.LST
pascal@21754 33 sub(/mov ax,-1/,"dec ax")
pascal@21754 34 if (/jmp/) isiso=0
pascal@21754 35 }
pascal@21754 36 if (/int len =/) isiso=6
pascal@21754 37 if (isiso == 6) { # ISO9660.LST
pascal@21754 38 if (/dx,ax/) next
pascal@21754 39 sub(/ax/,"dx")
pascal@21754 40 sub(/cx,di/,"bx,di")
pascal@21754 41 sub(/cx,dx/,"bx,ax")
pascal@21754 42 sub(/di,dx/,"di,ax")
pascal@21754 43 if (/while/) isiso=2
pascal@21754 44 }
pascal@21754 45 if (/entrysize =/) isiso=5
pascal@21754 46 if (isiso == 5) { # ISO9660.LST
pascal@21754 47 if (/ax,ax/) next
pascal@21754 48 sub(/ax/,"cx")
pascal@21754 49 sub(/je/,"jcxz")
pascal@21754 50 if (/return/) isiso=0
pascal@21754 51 }
pascal@21735 52 if (/x->curdirsize == 0xFFFF/) isiso=4
pascal@21735 53 if (isiso == 4) { # ISO9660.LST
pascal@21754 54 sub(/DGROUP:_isostate\+18/,"[si+18]")
pascal@21754 55 sub(/DGROUP:_isostate\+20/,"[si+20]")
pascal@21747 56 if (/goto restarted/) isiso=0
pascal@21735 57 }
pascal@21754 58 if (/do s\+\+; while/) isiso=3
pascal@21754 59 if (/for \(p = s; \*s && \*s \!=/) isiso=3
pascal@21750 60 if (isiso == 3) { # ISO9660.LST, TAZBOOT.LST
pascal@21754 61 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 62 if (/mov byte ptr \[bp-5\],al/) $0=" push ax"
pascal@21754 63 if (/mov al,byte ptr \[bp-5\]/) $0=" pop ax"
pascal@21754 64 if (/inc /) { r=$2; print; next }
pascal@21754 65 if (/al,0/) print " mov al,[" r "]"
pascal@21754 66 if (/al,byte ptr/) sub(/mov/,"xchg")
pascal@21754 67 if (/byte ptr \[.*\],0/) next
pascal@21754 68 if (/jmp/) print " mov bx,si"
pascal@21754 69 if (/word ptr \[bp-4\]/) next
pascal@21754 70 if (/\) s\+\+;/ || /\],-1/) isiso=0
pascal@21735 71 }
pascal@21735 72 if (/endname = NULL/) isiso=2
pascal@21735 73 if (isiso == 2) { # ISO9660.LST
pascal@21735 74 if (/mov bx,cx/) next
pascal@21735 75 gsub(/cx/,"bx")
pascal@21754 76 sub(/DGROUP:_isostate\+35/,"[si+35]")
pascal@21735 77 }
pascal@21735 78 if (/const char \*n = name/) isiso=1
pascal@21735 79 if (isiso == 1) { # ISO9660.LST
pascal@21735 80 if ((/mov word ptr \[si\+32\],ax/ ) ||
pascal@21754 81 (/mov ax,word ptr \[si\+2\]/) ||
pascal@21735 82 (/bx,word ptr \[si\+32\]/) || (/ax,dx/)) next
pascal@21729 83 if (/dx,/) sub(/dx/,"ax")
pascal@21754 84 if ((/sub ax,word ptr \[si\+2\]/) ||
pascal@21754 85 (/\[si\+16\]/) || (/ax,di/)) sub(/ax/,"bx")
pascal@21754 86 if (/add word ptr \[si\+32\],ax/) $0=" add bx,word ptr [si+16]"
pascal@21735 87 if (/al,/ || /,al/) sub(/al/,"cl")
pascal@21754 88 if (/cmp byte ptr \[si\+34\],0/) $0=" or cl,cl"
pascal@21735 89 if (/jne @@0$/) next
pascal@21735 90 if (/jmp @3@58$/) $0=" je @3@58"
pascal@21754 91 sub(/mov ax,-1/,"dec ax")
pascal@21754 92 }
pascal@21754 93 if (/endp/) { xlabel = ""; goto2=0 }
pascal@21754 94 if (/isoopen\(s\+7\)/ && xlabel == "") goto2=1
pascal@21754 95 if (/_vid_mode,ax/ && xlabel == "") goto2=1
pascal@21754 96 if (/_base_himem\+2,/ && xlabel == "@") goto2=1
pascal@21754 97 if (/puts\(cmdline\)/ && xlabel == "@@") goto2=1
pascal@21754 98 if (goto2 == 1 && /jmp/) { # TAZBOOT.LST && LINLD.LST
pascal@21754 99 print $NF xlabel "@:"
pascal@21754 100 label=$NF
pascal@21754 101 }
pascal@21754 102 if (goto2 > 0 && label == $NF) {
pascal@21754 103 $0=$0 xlabel
pascal@21754 104 if (goto2++ == 1) xlabel=xlabel "@"
pascal@21754 105 }
pascal@21754 106 if (/cmdline=s\+=3/ || /magic \!= 0/ || /&root_dev =/) { isotazboot=10; j="" }
pascal@21754 107 if (isotazboot == 10) { # TAZBOOT.LST && LINLD.LST
pascal@21754 108 if (/je/ || /jne/) { j=$1; next }
pascal@21754 109 if (/jmp/) {
pascal@21754 110 if (j=="jne") sub(/jmp/,"je")
pascal@21754 111 else if (j=="je") sub(/jmp/,"jne")
pascal@21754 112 isotazboot=0
pascal@21754 113 }
pascal@21754 114 }
pascal@21754 115 if (/static const unsigned long initrddesc = 18L/) isotazboot=9
pascal@21754 116 if (isotazboot == 9) { # TAZBOOT.LST
pascal@21754 117 if (/,0/) {
pascal@21754 118 split($4,y,",")
pascal@21754 119 print " mov bx,offset " y[1]
pascal@21754 120 }
pascal@21754 121 if (/DGROUP:.*\+6,46/) {
pascal@21754 122 sub(/DGROUP:.*\+6,/,"[bx+6],")
pascal@21754 123 isotazboot=0
pascal@21754 124 }
pascal@21754 125 if (/mov/) $0=" mov si,bx"
pascal@21754 126 sub(/DGROUP:.*,/,"[bx],")
pascal@21729 127 }
pascal@21750 128 if (/isoopen\(s\+7\) != -1/) isotazboot=8
pascal@21750 129 if (isotazboot == 8) { # TAZBOOT.LST
pascal@21750 130 if (/ax,si/) next
pascal@21750 131 sub(/ax,ax/,"si,si")
pascal@21750 132 if (/magic/) isotazboot=0
pascal@21750 133 }
pascal@21750 134 if (/\+\+isknoppix/) isotazboot=7
pascal@21750 135 if (isotazboot == 7) { # TAZBOOT.LST
pascal@21750 136 if (/al,byte/) sub (/al,byte ptr DGROUP:/,"bx,offset ")
pascal@21750 137 if (/inc/) sub (/al/,"word ptr [bx]")
pascal@21750 138 if (/,al/) next
pascal@21750 139 if (/isokernel/) isotazboot=0
pascal@21750 140 }
pascal@21750 141 if (/if \(c\) s\+\+;/) isotazboot=6
pascal@21750 142 if (isotazboot == 6) { # TAZBOOT.LST
pascal@21750 143 if (/cmp/) {
pascal@21750 144 $0=" cmp al,0"
pascal@21750 145 isotazboot=0
pascal@21750 146 }
pascal@21750 147 }
pascal@21754 148 if (/static void next_chunk/) isotazboot=5
pascal@21754 149 if (isotazboot == 5 || isotazboot == 500) { # TAZBOOT.LST
pascal@21750 150 if (/cx,ax/) $0=" xchg ax,bx"
pascal@21754 151 if (/ax,word ptr \[si\+28\]/ && isotazboot == 500) next
pascal@21750 152 if (/bx,cx/) next
pascal@21754 153 if (/push/ || /pop/ || /bp,sp/ || /si,/) next
pascal@21754 154 sub(/\[si/,"[di")
pascal@21754 155 if (/initrd_info/) isotazboot=500
pascal@21750 156 if (/endp/) isotazboot=0
pascal@21750 157 }
pascal@21750 158 if (/0x7FF0/) isotazboot=4
pascal@21750 159 if (isotazboot == 4) { # TAZBOOT.LST
pascal@21750 160 if (/ax,word ptr/) {
pascal@21750 161 print " mov ax,32752"
pascal@21754 162 print " cwd"
pascal@21750 163 sub(/mov/,"sub")
pascal@21750 164 }
pascal@21750 165 if (/bx,/ || /cx,/ || /dx,/) next
pascal@21754 166 sub(/,0/,",dx")
pascal@21754 167 sub(/,bx/,",dx")
pascal@21750 168 sub(/,cx/,",ax")
pascal@21754 169 if (/@addinitrd\$qv/) isotazboot=0
pascal@21750 170 }
pascal@21750 171 if (/c = x->filename/) isotazboot=3
pascal@21750 172 if (isotazboot == 3) { # TAZBOOT.LST
pascal@21750 173 if (/ax,/) $0=" xchg ax,bx"
pascal@21750 174 if (/\]$/) next
pascal@21750 175 if (/@strcpy\$qpxzct1/) isotazboot=0
pascal@21750 176 }
pascal@21754 177 if (/base_himem = memtop/) isotazboot=2
pascal@21750 178 if (isotazboot == 2) { # TAZBOOT.LST
pascal@21754 179 if (/@6@226/ || /mov ax,1/ || /@6@254/ || /xor ax,ax/) next
pascal@21752 180 if (/word ptr \[bx\+2\],0/) {
pascal@21754 181 print s; hold=0
pascal@21752 182 print " mov bx,word ptr [bx+2]"
pascal@21752 183 $0=" or bx,bx"
pascal@21752 184 }
pascal@21752 185 if (/\[bp-4\],ax/) sub(/ax/,"bx")
pascal@21752 186 if (/ax,word ptr \[bx\+2\]/ || /bx,ax/) next
pascal@21750 187 if (/@strcmp\$qpxzct1/) isotazboot=0
pascal@21750 188 }
pascal@21751 189 if (/static void addinitrd/) isotazboot=100
pascal@21751 190 if (isotazboot == 100) { # TAZBOOT.LST
pascal@21751 191 if (/cx,ax/) {
pascal@21754 192 print " mov si,offset _isostate+8"
pascal@21754 193 print " xchg ax,di"
pascal@21751 194 print " movsw"
pascal@21751 195 print " movsw"
pascal@21751 196 print " movsw"
pascal@21751 197 print " movsw"
pascal@21754 198 $0=" xchg ax,di"
pascal@21751 199 }
pascal@21751 200 if (/mov/ && !/si/ && !/cl/) next
pascal@21754 201 if (/void load_initrds/) isotazboot=101
pascal@21751 202 }
pascal@21754 203 if (isotazboot == 101 || isotazboot == 102) { # TAZBOOT.LST
pascal@21754 204 sub(/\[si/,"[di"); sub(/si,/,"di,"); sub(/si$/,"di")
pascal@21754 205 sub(/DGROUP:_imgs\+38$/,"[di+38-32]")
pascal@21754 206 sub(/DGROUP:_imgs\+40$/,"[di+40-32]")
pascal@21754 207 if (/isofd/) isotazboot=102
pascal@21754 208 if (/push/ && isotazboot == 102) next
pascal@21754 209 if (/pop/ && isotazboot == 102) next
pascal@21754 210 if (/load_initrd/) isotazboot=101
pascal@21754 211 if (/isokernel/) isotazboot=103
pascal@21754 212 }
pascal@21754 213 if (isotazboot > 102) { # TAZBOOT.LST
pascal@21754 214 if (/push/ || /pop/) next
pascal@21754 215 sub(/\[si/,"[bx")
pascal@21750 216 sub(/si,/,"bx,")
pascal@21750 217 if (/static void bootiso/) isotazboot=0
pascal@21750 218 }
pascal@21729 219 if (wascall) {
pascal@21729 220 if (rcall != "") {
pascal@21729 221 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 222 else print " xchg ax," rcall
pascal@21729 223 wascall=0
pascal@21729 224 }
pascal@21729 225 else if (/^ mov .i,ax$/) {
pascal@21729 226 split($2,y,",")
pascal@21729 227 rcall=y[1]
pascal@21729 228 next
pascal@21729 229 }
pascal@21729 230 else wascall=0
pascal@21729 231 }
pascal@21729 232 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 233 if (hold == 0) {
pascal@20458 234 s=$0
pascal@20534 235 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 236 r=$2; kept=0
pascal@20458 237 hold=1; split($2,regs,","); next
pascal@20458 238 }
pascal@21729 239 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 240 hold=2; r=$2; next
pascal@20458 241 }
pascal@20458 242 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 243 hold=3; split($2,regs,","); next
pascal@20458 244 }
pascal@20458 245 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 246 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 247 split($0,regs,",")
pascal@20543 248 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 249 (regs[2] % 256) == 0) {
pascal@20549 250 hold=5; next
pascal@20543 251 }
pascal@20543 252 }
pascal@20630 253 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 254 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 255 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 256 hold=8; split($2,regs,","); next
pascal@20630 257 }
pascal@20634 258 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 259 if (/^ add [abcds][ix],2$/) {
pascal@20634 260 split($2,regs,","); hold=12; next
pascal@20634 261 }
pascal@20634 262 if (/^ sub [abcds][ix],2$/) {
pascal@20634 263 split($2,regs,","); hold=13; next
pascal@20634 264 }
pascal@21569 265 if (/^ push dx$/) {
pascal@21569 266 hold=14; next;
pascal@21569 267 }
pascal@20458 268 }
pascal@20458 269 else if (hold == 1) {
pascal@20543 270 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 271 hold=0; split($2,args,","); op=""
pascal@20458 272 if ($1 == "add") op="+"
pascal@20458 273 if ($1 == "sub") op="-"
pascal@20751 274 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 275 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 276 if (op != "" && regs[1] == args[1]) {
pascal@20543 277 if (isnum(args[2])) {
pascal@20630 278 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 279 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@20630 280 hold=10; next
pascal@20543 281 }
pascal@20543 282 line[kept++]=$0
pascal@20543 283 hold=1
pascal@20458 284 next
pascal@20458 285 }
pascal@20520 286 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 287 print " xchg " r
pascal@20520 288 }
pascal@20543 289 else print s
pascal@20543 290 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 291 }
pascal@20458 292 else if (hold == 2) {
pascal@21729 293 split($0,args,",")
pascal@21729 294 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 295 split($2,args,",")
pascal@21729 296 hold=0; print s
pascal@20458 297 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 298 }
pascal@20458 299 else if (hold == 3) {
pascal@20458 300 hold=0
pascal@21576 301 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 302 if (/^ add [abcds][ix],/) {
pascal@20458 303 split($2,regs2,",")
pascal@20458 304 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 305 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 306 print t; print s; next
pascal@20458 307 }
pascal@20458 308 }
pascal@20458 309 print s
pascal@20458 310 }
pascal@20458 311 else if (hold == 4) {
pascal@20458 312 hold=0
pascal@20458 313 if (/^ push eax$/) {
pascal@20458 314 print " push 0"; print " push ax"; next
pascal@20458 315 } else { print s }
pascal@20458 316 }
pascal@20543 317 else if (hold == 5) {
pascal@20543 318 hold=0
pascal@20543 319 if ($1 == "jae" || $1 == "jb") {
pascal@20544 320 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 321 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 322 s = s "/256"
pascal@20543 323 }
pascal@20543 324 print s
pascal@20543 325 }
pascal@20630 326 else if (hold == 6) {
pascal@20630 327 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 328 line[kept++]=$0
pascal@20630 329 next
pascal@20630 330 }
pascal@20630 331 p=$0
pascal@20630 332 if (/^ movzx eax,ax$/) {
pascal@20630 333 s=" mov eax,cs"; p=""
pascal@20630 334 }
pascal@20630 335 print s
pascal@20630 336 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 337 if (p != "") print p
pascal@20630 338 hold=0; next
pascal@20630 339 }
pascal@20630 340 else if (hold == 7) {
pascal@20458 341 hold=0
pascal@20520 342 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 343 print " extrn N_LXURSH@4:near"
pascal@20520 344 print " call near ptr N_LXURSH@4"
pascal@20520 345 next
pascal@20520 346 }
pascal@20528 347 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 348 print " extrn N_LXLSH@4:near"
pascal@20528 349 print " call near ptr N_LXLSH@4"
pascal@20528 350 next
pascal@20528 351 }
pascal@20520 352 print s
pascal@20458 353 }
pascal@20630 354 else if (hold == 8) {
pascal@20630 355 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 356 hold=0
pascal@20630 357 print s
pascal@20630 358 }
pascal@20630 359 else if (hold == 9) {
pascal@20630 360 hold=0; split($2,args,",")
pascal@20630 361 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 362 print; print " or ax,ax"; print p; next
pascal@20630 363 }
pascal@20630 364 print s; print p;
pascal@20630 365 }
pascal@20630 366 else if (hold == 10) {
pascal@20751 367 split($2,args,","); op=""
pascal@20751 368 if ($1 == "add") op="+"
pascal@20751 369 if ($1 == "sub") op="-"
pascal@20751 370 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 371 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 372 if (op != "" && isnum(args[2])) {
pascal@20751 373 split(line[0],reg,",")
pascal@20751 374 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 375 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 376 next
pascal@20751 377 }
pascal@20751 378 }
pascal@20630 379 hold=0
pascal@20630 380 if (/^ mov [sd]i,ax$/) {
pascal@20630 381 split($2,args,",")
pascal@20630 382 for (i = 0; i < kept; i++) {
pascal@20630 383 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 384 }
pascal@20630 385 next
pascal@20630 386 }
pascal@20630 387 for (i = 0; i < kept; i++) print line[i]
pascal@20630 388 }
pascal@20634 389 else if (hold == 11) {
pascal@20634 390 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 391 line[kept++]=$0; next
pascal@20634 392 }
pascal@20634 393 split($2,args,",")
pascal@20634 394 if (/^ mov cl,/) {
pascal@20634 395 split($2,args,",")
pascal@20634 396 if (args[2] >= 8) {
pascal@20634 397 line[kept++]=$0; next
pascal@20634 398 }
pascal@20634 399 }
pascal@20634 400 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 401 print " cbw "
pascal@20634 402 }
pascal@20634 403 for (i = 0; i < kept; i++) print line[i]
pascal@20634 404 hold=kept=0
pascal@20634 405 }
pascal@20634 406 else if (hold == 12) {
pascal@20634 407 hold=0
pascal@20634 408 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 409 print " inc " regs[1]
pascal@20634 410 print " inc " regs[1]
pascal@20634 411 }
pascal@20634 412 else print " add " regs[1] ",2"
pascal@20634 413 }
pascal@20634 414 else if (hold == 13) {
pascal@20634 415 hold=0
pascal@20634 416 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 417 print " dec " regs[1]
pascal@20634 418 print " dec " regs[1]
pascal@20634 419 }
pascal@20634 420 else print " sub " regs[1] ",2"
pascal@20634 421 }
pascal@21569 422 else if (hold == 14) {
pascal@21569 423 if (/^ push ax$/) { hold++; next; }
pascal@21569 424 print " push dx";
pascal@21569 425 hold=0;
pascal@21569 426 }
pascal@21569 427 else if (hold == 15) {
pascal@21569 428 if (/^ pop eax$/) { hold++; next; }
pascal@21569 429 print " push dx";
pascal@21569 430 print " push ax";
pascal@21569 431 hold=0;
pascal@21569 432 }
pascal@21569 433 else if (hold == 16) {
pascal@21569 434 hold=0;
pascal@21569 435 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 436 print " push dx";
pascal@21569 437 print " push ax";
pascal@21569 438 print " pop eax";
pascal@21569 439 }
pascal@21569 440 else if (hold == 17) {
pascal@21569 441 hold=0;
pascal@21569 442 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 443 }
pascal@21576 444 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 445 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 446 /^ call near ptr @isoreset\$/ ||
pascal@21628 447 /^ call near ptr @isoopen\$/ ||
pascal@21628 448 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 449 /^ call near ptr @strhead\$/ ||
pascal@21576 450 /^ call near ptr @argstr\$/ ||
pascal@21576 451 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 452 s=$0
pascal@20458 453 # These optimisation may break ZF or CF
pascal@20485 454 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 455 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 456 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 457 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 458 sub(/mov/,"and",s); print s; next # slower
pascal@20458 459 }
pascal@20458 460 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 461 sub(/mov/,"or",s); print s; next # slower
pascal@20458 462 }
pascal@20458 463 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 464 if (/^ or [abcd]x,/) {
pascal@20458 465 split($2,args,",")
pascal@20458 466 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 467 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 468 }
pascal@20458 469 }
pascal@20458 470 if (/^ and [abcd]x,/) {
pascal@20458 471 split($2,args,",")
pascal@20459 472 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 473 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 474 }
pascal@20458 475 }
pascal@20458 476 if (/^ or e[abcd]x,/) {
pascal@20458 477 split($2,args,",")
pascal@20458 478 if (args[2] == "large") { args[2] = $3 }
pascal@20458 479 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 480 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 481 }
pascal@20458 482 }
pascal@20458 483 if (/^ and e[abcd]x,/) {
pascal@20458 484 split($2,args,",")
pascal@20458 485 if (args[2] == "large") { args[2] = $3 }
pascal@20459 486 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 487 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 488 }
pascal@20458 489 }
pascal@20458 490 if (/^ or e[abcds][ix],/) {
pascal@20458 491 split($2,args,",")
pascal@20458 492 if (args[2] == "large") { args[2] = $3 }
pascal@20458 493 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 494 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 495 }
pascal@20458 496 }
pascal@20458 497 if (/^ and e[abcds][ix],/) {
pascal@20458 498 split($2,args,",")
pascal@20458 499 if (args[2] == "large") { args[2] = $3 }
pascal@20459 500 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 501 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 502 }
pascal@20458 503 }
pascal@20543 504 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 505 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 506 split($0,args,",")
pascal@20542 507 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 508 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 509 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 510 print s "/256"; next
pascal@20542 511 }
pascal@20542 512 }
pascal@20546 513 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 514 split($0,args,",")
pascal@20543 515 if (args[2] == "large") { args[2] = $3 }
pascal@20458 516 if (isnum(args[2])) {
pascal@20546 517 if (args[2] % 16777216 == 0) {
pascal@20546 518 sub(/dword/,"byte",s)
pascal@20543 519 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 520 print s "/16777216"; next
pascal@20458 521 }
pascal@20458 522 if (args[2] % 65536 == 0) {
pascal@20546 523 sub(/dword/,"word",s)
pascal@20543 524 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 525 print s "/65536"; next
pascal@20458 526 }
pascal@20458 527 }
pascal@20458 528 }
pascal@20458 529 if (/^ mov e.x,/) {
pascal@20458 530 split($2,args,",")
pascal@20458 531 r=args[1]
pascal@20458 532 if (args[2] == "large") { args[2] = $3 }
pascal@20458 533 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 534 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 535 print " xor " r "," r
pascal@20458 536 if (args[2] == 0) next
pascal@20458 537 x=" mov " substr(r,2,1)
pascal@20458 538 if (args[2] % 256 == 0) {
pascal@20458 539 print x "h," args[2] "/256"
pascal@20458 540 }
pascal@20458 541 else { print x "l," args[2] }
pascal@20458 542 next
pascal@20458 543 }
pascal@20458 544 }
pascal@20458 545 }
pascal@21576 546 if (afterjmp) print ";" $0
pascal@21576 547 else print
pascal@21754 548 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@21754 549 /^ call near ptr @die$qpxzc/) afterjmp=1
pascal@20458 550 }