wok annotate linld/stuff/src/pipehole.awk @ rev 21757

tazboot: spave 40k+ for zImage
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Jun 24 16:31:09 2019 +0200 (2019-06-24)
parents 8b9f768b711e
children d8f824013cf6
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@21757 8 sub(/DGROUP:_imgs\+65534/,"[di-2]")
pascal@21757 9 if (/cmd_line_ptr =/ && is386 == 0) isload=7
pascal@21757 10 if (isload == 7) { # LOAD.LST
pascal@21757 11 if (/add/ || /xor/ || /extrn/ || /N_LXLSH@/ || /cl,4/) next
pascal@21757 12 if (/,ax/) {
pascal@21757 13 sub(/ax/,"8000h")
pascal@21757 14 isload=0
pascal@21757 15 }
pascal@21757 16 if (/,dx/) {
pascal@21757 17 print " mov cl,12"
pascal@21757 18 print " shr ax,cl"
pascal@21757 19 sub(/dx/,"ax")
pascal@21757 20 }
pascal@21757 21 }
pascal@21757 22 if (/\[0\] = m-\>fallback/) isload=6
pascal@21757 23 if (isload == 6) { # LOAD.LST
pascal@21757 24 if (/si\+2/) {
pascal@21757 25 print " inc si"
pascal@21757 26 $0=" inc si"
pascal@21757 27 }
pascal@21757 28 if (/les/) sub(/bx,/,"ax,")
pascal@21757 29 if (/bx\+4/ || /es:/) {
pascal@21757 30 if (/bx\+4/) isload=0
pascal@21757 31 next
pascal@21757 32 }
pascal@21757 33 if (/si\+6/) {
pascal@21757 34 print " xchg ax,di"
pascal@21757 35 print " movsw"
pascal@21757 36 print " movsw"
pascal@21757 37 print " movsw"
pascal@21757 38 print " movsw"
pascal@21757 39 print " xchg ax,di"
pascal@21757 40 next
pascal@21757 41 }
pascal@21757 42 }
pascal@21757 43 if (/version_string = /) isload=5
pascal@21757 44 if (isload == 5) { # LOAD.LST
pascal@21757 45 sub(/ax,/,"bx,")
pascal@21757 46 if (/_version_string,/) isload=0
pascal@21757 47 if (/mov bx,ax/) next
pascal@21757 48 }
pascal@21757 49 if (/topseg\(\)>>12/) isload=4
pascal@21757 50 if (isload == 4 && is386 == 0) { # LOAD.LST
pascal@21757 51 if (/push/ || /pop/) next
pascal@21757 52 if (/ax,cs/) {
pascal@21757 53 print " cwd"
pascal@21757 54 sub(/ax,cs/,"bx,cs")
pascal@21757 55 }
pascal@21757 56 if (/dx,dx/) next
pascal@21757 57 sub(/ax,dx/,"ax,bx")
pascal@21757 58 if (/call/) isload=400
pascal@21757 59 }
pascal@21757 60 if (isload == 400 && /,0/) {
pascal@21757 61 sub(/,0/,",dh")
pascal@21757 62 isload=0
pascal@21757 63 }
pascal@21757 64 if (isload == 4 && is386) { # LOAD.LST
pascal@21757 65 sub(/dx,cs/,"edx,cs")
pascal@21757 66 sub(/eax/,"edx")
pascal@21757 67 sub(/ax,9/,"dx,9")
pascal@21757 68 if (/,0/) sub(/,0/,",dh")
pascal@21757 69 if (/movzx/) next
pascal@21757 70 if (/fallback = base_himem/) { isload=0 }
pascal@21757 71 }
pascal@21754 72 if (/void load_initrd\(\)/) isload=3
pascal@21754 73 if (isload == 3) { # LOAD.LST
pascal@21754 74 if(/push di/ || /pop di/) next
pascal@21754 75 sub(/\[di/,"[bx")
pascal@21754 76 sub(/\di,/,"bx,")
pascal@21754 77 }
pascal@21750 78 if (/vid_mode = vid_mode/) isload=2
pascal@21750 79 if (isload == 2) { # LOAD.LST
pascal@21750 80 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 81 sub(/je/,"jcxz")
pascal@21750 82 if (/ax,word/) next
pascal@21750 83 sub(/,ax/,",cx")
pascal@21757 84 if (/version_string/ || /starting linux 1\.3\.73/) isload=0
pascal@21750 85 }
pascal@21757 86 if (/_rm_size=0x200/ || /heap_top = _rm_buf/) isload=1
pascal@21750 87 if (isload == 1) { # LOAD.LST
pascal@21729 88 if (/mov al,byte ptr/ && is386) {
pascal@21729 89 print " movzx eax,byte ptr [si]"
pascal@21729 90 next
pascal@21729 91 }
pascal@21729 92 if (/ax,word ptr/) next
pascal@21729 93 if (/^ call/) isload=0
pascal@21729 94 }
pascal@21754 95 if (/CD001/) isiso=7
pascal@21754 96 if (isiso == 7) { # ISO9660.LST
pascal@21754 97 sub(/mov ax,-1/,"dec ax")
pascal@21754 98 if (/jmp/) isiso=0
pascal@21754 99 }
pascal@21754 100 if (/int len =/) isiso=6
pascal@21754 101 if (isiso == 6) { # ISO9660.LST
pascal@21754 102 if (/dx,ax/) next
pascal@21754 103 sub(/ax/,"dx")
pascal@21754 104 sub(/cx,di/,"bx,di")
pascal@21754 105 sub(/cx,dx/,"bx,ax")
pascal@21754 106 sub(/di,dx/,"di,ax")
pascal@21754 107 if (/while/) isiso=2
pascal@21754 108 }
pascal@21754 109 if (/entrysize =/) isiso=5
pascal@21754 110 if (isiso == 5) { # ISO9660.LST
pascal@21754 111 if (/ax,ax/) next
pascal@21754 112 sub(/ax/,"cx")
pascal@21754 113 sub(/je/,"jcxz")
pascal@21754 114 if (/return/) isiso=0
pascal@21754 115 }
pascal@21735 116 if (/x->curdirsize == 0xFFFF/) isiso=4
pascal@21735 117 if (isiso == 4) { # ISO9660.LST
pascal@21754 118 sub(/DGROUP:_isostate\+18/,"[si+18]")
pascal@21754 119 sub(/DGROUP:_isostate\+20/,"[si+20]")
pascal@21747 120 if (/goto restarted/) isiso=0
pascal@21735 121 }
pascal@21754 122 if (/do s\+\+; while/) isiso=3
pascal@21754 123 if (/for \(p = s; \*s && \*s \!=/) isiso=3
pascal@21750 124 if (isiso == 3) { # ISO9660.LST, TAZBOOT.LST
pascal@21754 125 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 126 if (/mov byte ptr \[bp-5\],al/) $0=" push ax"
pascal@21754 127 if (/mov al,byte ptr \[bp-5\]/) $0=" pop ax"
pascal@21754 128 if (/inc /) { r=$2; print; next }
pascal@21754 129 if (/al,0/) print " mov al,[" r "]"
pascal@21754 130 if (/al,byte ptr/) sub(/mov/,"xchg")
pascal@21754 131 if (/byte ptr \[.*\],0/) next
pascal@21754 132 if (/jmp/) print " mov bx,si"
pascal@21754 133 if (/word ptr \[bp-4\]/) next
pascal@21754 134 if (/\) s\+\+;/ || /\],-1/) isiso=0
pascal@21735 135 }
pascal@21735 136 if (/endname = NULL/) isiso=2
pascal@21735 137 if (isiso == 2) { # ISO9660.LST
pascal@21735 138 if (/mov bx,cx/) next
pascal@21735 139 gsub(/cx/,"bx")
pascal@21754 140 sub(/DGROUP:_isostate\+35/,"[si+35]")
pascal@21735 141 }
pascal@21735 142 if (/const char \*n = name/) isiso=1
pascal@21735 143 if (isiso == 1) { # ISO9660.LST
pascal@21735 144 if ((/mov word ptr \[si\+32\],ax/ ) ||
pascal@21754 145 (/mov ax,word ptr \[si\+2\]/) ||
pascal@21735 146 (/bx,word ptr \[si\+32\]/) || (/ax,dx/)) next
pascal@21729 147 if (/dx,/) sub(/dx/,"ax")
pascal@21754 148 if ((/sub ax,word ptr \[si\+2\]/) ||
pascal@21754 149 (/\[si\+16\]/) || (/ax,di/)) sub(/ax/,"bx")
pascal@21754 150 if (/add word ptr \[si\+32\],ax/) $0=" add bx,word ptr [si+16]"
pascal@21735 151 if (/al,/ || /,al/) sub(/al/,"cl")
pascal@21754 152 if (/cmp byte ptr \[si\+34\],0/) $0=" or cl,cl"
pascal@21735 153 if (/jne @@0$/) next
pascal@21735 154 if (/jmp @3@58$/) $0=" je @3@58"
pascal@21754 155 sub(/mov ax,-1/,"dec ax")
pascal@21754 156 }
pascal@21754 157 if (/endp/) { xlabel = ""; goto2=0 }
pascal@21754 158 if (/isoopen\(s\+7\)/ && xlabel == "") goto2=1
pascal@21754 159 if (/_vid_mode,ax/ && xlabel == "") goto2=1
pascal@21754 160 if (/_base_himem\+2,/ && xlabel == "@") goto2=1
pascal@21754 161 if (/puts\(cmdline\)/ && xlabel == "@@") goto2=1
pascal@21754 162 if (goto2 == 1 && /jmp/) { # TAZBOOT.LST && LINLD.LST
pascal@21754 163 print $NF xlabel "@:"
pascal@21754 164 label=$NF
pascal@21754 165 }
pascal@21754 166 if (goto2 > 0 && label == $NF) {
pascal@21754 167 $0=$0 xlabel
pascal@21754 168 if (goto2++ == 1) xlabel=xlabel "@"
pascal@21754 169 }
pascal@21754 170 if (/cmdline=s\+=3/ || /magic \!= 0/ || /&root_dev =/) { isotazboot=10; j="" }
pascal@21754 171 if (isotazboot == 10) { # TAZBOOT.LST && LINLD.LST
pascal@21754 172 if (/je/ || /jne/) { j=$1; next }
pascal@21754 173 if (/jmp/) {
pascal@21754 174 if (j=="jne") sub(/jmp/,"je")
pascal@21754 175 else if (j=="je") sub(/jmp/,"jne")
pascal@21754 176 isotazboot=0
pascal@21754 177 }
pascal@21754 178 }
pascal@21754 179 if (/static const unsigned long initrddesc = 18L/) isotazboot=9
pascal@21754 180 if (isotazboot == 9) { # TAZBOOT.LST
pascal@21754 181 if (/,0/) {
pascal@21754 182 split($4,y,",")
pascal@21754 183 print " mov bx,offset " y[1]
pascal@21754 184 }
pascal@21754 185 if (/DGROUP:.*\+6,46/) {
pascal@21754 186 sub(/DGROUP:.*\+6,/,"[bx+6],")
pascal@21754 187 isotazboot=0
pascal@21754 188 }
pascal@21754 189 if (/mov/) $0=" mov si,bx"
pascal@21754 190 sub(/DGROUP:.*,/,"[bx],")
pascal@21729 191 }
pascal@21750 192 if (/isoopen\(s\+7\) != -1/) isotazboot=8
pascal@21750 193 if (isotazboot == 8) { # TAZBOOT.LST
pascal@21750 194 if (/ax,si/) next
pascal@21750 195 sub(/ax,ax/,"si,si")
pascal@21750 196 if (/magic/) isotazboot=0
pascal@21750 197 }
pascal@21750 198 if (/\+\+isknoppix/) isotazboot=7
pascal@21750 199 if (isotazboot == 7) { # TAZBOOT.LST
pascal@21750 200 if (/al,byte/) sub (/al,byte ptr DGROUP:/,"bx,offset ")
pascal@21750 201 if (/inc/) sub (/al/,"word ptr [bx]")
pascal@21750 202 if (/,al/) next
pascal@21750 203 if (/isokernel/) isotazboot=0
pascal@21750 204 }
pascal@21750 205 if (/if \(c\) s\+\+;/) isotazboot=6
pascal@21750 206 if (isotazboot == 6) { # TAZBOOT.LST
pascal@21750 207 if (/cmp/) {
pascal@21750 208 $0=" cmp al,0"
pascal@21750 209 isotazboot=0
pascal@21750 210 }
pascal@21750 211 }
pascal@21754 212 if (/static void next_chunk/) isotazboot=5
pascal@21754 213 if (isotazboot == 5 || isotazboot == 500) { # TAZBOOT.LST
pascal@21750 214 if (/cx,ax/) $0=" xchg ax,bx"
pascal@21754 215 if (/ax,word ptr \[si\+28\]/ && isotazboot == 500) next
pascal@21750 216 if (/bx,cx/) next
pascal@21754 217 if (/push/ || /pop/ || /bp,sp/ || /si,/) next
pascal@21754 218 sub(/\[si/,"[di")
pascal@21754 219 if (/initrd_info/) isotazboot=500
pascal@21750 220 if (/endp/) isotazboot=0
pascal@21750 221 }
pascal@21750 222 if (/0x7FF0/) isotazboot=4
pascal@21750 223 if (isotazboot == 4) { # TAZBOOT.LST
pascal@21750 224 if (/ax,word ptr/) {
pascal@21750 225 print " mov ax,32752"
pascal@21754 226 print " cwd"
pascal@21750 227 sub(/mov/,"sub")
pascal@21750 228 }
pascal@21750 229 if (/bx,/ || /cx,/ || /dx,/) next
pascal@21754 230 sub(/,0/,",dx")
pascal@21754 231 sub(/,bx/,",dx")
pascal@21750 232 sub(/,cx/,",ax")
pascal@21754 233 if (/@addinitrd\$qv/) isotazboot=0
pascal@21750 234 }
pascal@21750 235 if (/c = x->filename/) isotazboot=3
pascal@21750 236 if (isotazboot == 3) { # TAZBOOT.LST
pascal@21750 237 if (/ax,/) $0=" xchg ax,bx"
pascal@21750 238 if (/\]$/) next
pascal@21750 239 if (/@strcpy\$qpxzct1/) isotazboot=0
pascal@21750 240 }
pascal@21754 241 if (/base_himem = memtop/) isotazboot=2
pascal@21750 242 if (isotazboot == 2) { # TAZBOOT.LST
pascal@21754 243 if (/@6@226/ || /mov ax,1/ || /@6@254/ || /xor ax,ax/) next
pascal@21752 244 if (/word ptr \[bx\+2\],0/) {
pascal@21754 245 print s; hold=0
pascal@21752 246 print " mov bx,word ptr [bx+2]"
pascal@21752 247 $0=" or bx,bx"
pascal@21752 248 }
pascal@21752 249 if (/\[bp-4\],ax/) sub(/ax/,"bx")
pascal@21752 250 if (/ax,word ptr \[bx\+2\]/ || /bx,ax/) next
pascal@21750 251 if (/@strcmp\$qpxzct1/) isotazboot=0
pascal@21750 252 }
pascal@21751 253 if (/static void addinitrd/) isotazboot=100
pascal@21751 254 if (isotazboot == 100) { # TAZBOOT.LST
pascal@21751 255 if (/cx,ax/) {
pascal@21754 256 print " mov si,offset _isostate+8"
pascal@21757 257 print " push ds"
pascal@21757 258 print " pop es"
pascal@21754 259 print " xchg ax,di"
pascal@21751 260 print " movsw"
pascal@21751 261 print " movsw"
pascal@21751 262 print " movsw"
pascal@21751 263 print " movsw"
pascal@21754 264 $0=" xchg ax,di"
pascal@21751 265 }
pascal@21751 266 if (/mov/ && !/si/ && !/cl/) next
pascal@21754 267 if (/void load_initrds/) isotazboot=101
pascal@21751 268 }
pascal@21754 269 if (isotazboot == 101 || isotazboot == 102) { # TAZBOOT.LST
pascal@21754 270 sub(/\[si/,"[di"); sub(/si,/,"di,"); sub(/si$/,"di")
pascal@21754 271 sub(/DGROUP:_imgs\+38$/,"[di+38-32]")
pascal@21754 272 sub(/DGROUP:_imgs\+40$/,"[di+40-32]")
pascal@21754 273 if (/isofd/) isotazboot=102
pascal@21754 274 if (/push/ && isotazboot == 102) next
pascal@21754 275 if (/pop/ && isotazboot == 102) next
pascal@21754 276 if (/load_initrd/) isotazboot=101
pascal@21754 277 if (/isokernel/) isotazboot=103
pascal@21754 278 }
pascal@21754 279 if (isotazboot > 102) { # TAZBOOT.LST
pascal@21754 280 if (/push/ || /pop/) next
pascal@21754 281 sub(/\[si/,"[bx")
pascal@21750 282 sub(/si,/,"bx,")
pascal@21750 283 if (/static void bootiso/) isotazboot=0
pascal@21750 284 }
pascal@21729 285 if (wascall) {
pascal@21729 286 if (rcall != "") {
pascal@21729 287 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 288 else print " xchg ax," rcall
pascal@21729 289 wascall=0
pascal@21729 290 }
pascal@21729 291 else if (/^ mov .i,ax$/) {
pascal@21729 292 split($2,y,",")
pascal@21729 293 rcall=y[1]
pascal@21729 294 next
pascal@21729 295 }
pascal@21729 296 else wascall=0
pascal@21729 297 }
pascal@21729 298 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 299 if (hold == 0) {
pascal@20458 300 s=$0
pascal@20534 301 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 302 r=$2; kept=0
pascal@20458 303 hold=1; split($2,regs,","); next
pascal@20458 304 }
pascal@21729 305 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 306 hold=2; r=$2; next
pascal@20458 307 }
pascal@20458 308 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 309 hold=3; split($2,regs,","); next
pascal@20458 310 }
pascal@20458 311 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 312 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 313 split($0,regs,",")
pascal@20543 314 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 315 (regs[2] % 256) == 0) {
pascal@20549 316 hold=5; next
pascal@20543 317 }
pascal@20543 318 }
pascal@20630 319 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 320 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 321 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 322 hold=8; split($2,regs,","); next
pascal@20630 323 }
pascal@20634 324 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 325 if (/^ add [abcds][ix],2$/) {
pascal@20634 326 split($2,regs,","); hold=12; next
pascal@20634 327 }
pascal@20634 328 if (/^ sub [abcds][ix],2$/) {
pascal@20634 329 split($2,regs,","); hold=13; next
pascal@20634 330 }
pascal@21569 331 if (/^ push dx$/) {
pascal@21569 332 hold=14; next;
pascal@21569 333 }
pascal@20458 334 }
pascal@20458 335 else if (hold == 1) {
pascal@20543 336 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 337 hold=0; split($2,args,","); op=""
pascal@20458 338 if ($1 == "add") op="+"
pascal@20458 339 if ($1 == "sub") op="-"
pascal@20751 340 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 341 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 342 if (op != "" && regs[1] == args[1]) {
pascal@20543 343 if (isnum(args[2])) {
pascal@20630 344 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 345 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@20630 346 hold=10; next
pascal@20543 347 }
pascal@20543 348 line[kept++]=$0
pascal@20543 349 hold=1
pascal@20458 350 next
pascal@20458 351 }
pascal@20520 352 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 353 print " xchg " r
pascal@20520 354 }
pascal@20543 355 else print s
pascal@20543 356 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 357 }
pascal@20458 358 else if (hold == 2) {
pascal@21729 359 split($0,args,",")
pascal@21729 360 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 361 split($2,args,",")
pascal@21729 362 hold=0; print s
pascal@20458 363 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 364 }
pascal@20458 365 else if (hold == 3) {
pascal@20458 366 hold=0
pascal@21576 367 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 368 if (/^ add [abcds][ix],/) {
pascal@20458 369 split($2,regs2,",")
pascal@20458 370 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 371 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 372 print t; print s; next
pascal@20458 373 }
pascal@20458 374 }
pascal@20458 375 print s
pascal@20458 376 }
pascal@20458 377 else if (hold == 4) {
pascal@20458 378 hold=0
pascal@20458 379 if (/^ push eax$/) {
pascal@20458 380 print " push 0"; print " push ax"; next
pascal@20458 381 } else { print s }
pascal@20458 382 }
pascal@20543 383 else if (hold == 5) {
pascal@20543 384 hold=0
pascal@20543 385 if ($1 == "jae" || $1 == "jb") {
pascal@20544 386 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 387 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 388 s = s "/256"
pascal@20543 389 }
pascal@20543 390 print s
pascal@20543 391 }
pascal@20630 392 else if (hold == 6) {
pascal@20630 393 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 394 line[kept++]=$0
pascal@20630 395 next
pascal@20630 396 }
pascal@20630 397 p=$0
pascal@20630 398 if (/^ movzx eax,ax$/) {
pascal@20630 399 s=" mov eax,cs"; p=""
pascal@20630 400 }
pascal@20630 401 print s
pascal@20630 402 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 403 if (p != "") print p
pascal@20630 404 hold=0; next
pascal@20630 405 }
pascal@20630 406 else if (hold == 7) {
pascal@20458 407 hold=0
pascal@20520 408 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 409 print " extrn N_LXURSH@4:near"
pascal@20520 410 print " call near ptr N_LXURSH@4"
pascal@20520 411 next
pascal@20520 412 }
pascal@20528 413 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 414 print " extrn N_LXLSH@4:near"
pascal@20528 415 print " call near ptr N_LXLSH@4"
pascal@20528 416 next
pascal@20528 417 }
pascal@20520 418 print s
pascal@20458 419 }
pascal@20630 420 else if (hold == 8) {
pascal@20630 421 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 422 hold=0
pascal@20630 423 print s
pascal@20630 424 }
pascal@20630 425 else if (hold == 9) {
pascal@20630 426 hold=0; split($2,args,",")
pascal@20630 427 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 428 print; print " or ax,ax"; print p; next
pascal@20630 429 }
pascal@20630 430 print s; print p;
pascal@20630 431 }
pascal@20630 432 else if (hold == 10) {
pascal@20751 433 split($2,args,","); op=""
pascal@20751 434 if ($1 == "add") op="+"
pascal@20751 435 if ($1 == "sub") op="-"
pascal@20751 436 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 437 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 438 if (op != "" && isnum(args[2])) {
pascal@20751 439 split(line[0],reg,",")
pascal@20751 440 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 441 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 442 next
pascal@20751 443 }
pascal@20751 444 }
pascal@20630 445 hold=0
pascal@20630 446 if (/^ mov [sd]i,ax$/) {
pascal@20630 447 split($2,args,",")
pascal@20630 448 for (i = 0; i < kept; i++) {
pascal@20630 449 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 450 }
pascal@20630 451 next
pascal@20630 452 }
pascal@20630 453 for (i = 0; i < kept; i++) print line[i]
pascal@20630 454 }
pascal@20634 455 else if (hold == 11) {
pascal@20634 456 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 457 line[kept++]=$0; next
pascal@20634 458 }
pascal@20634 459 split($2,args,",")
pascal@20634 460 if (/^ mov cl,/) {
pascal@20634 461 split($2,args,",")
pascal@20634 462 if (args[2] >= 8) {
pascal@20634 463 line[kept++]=$0; next
pascal@20634 464 }
pascal@20634 465 }
pascal@20634 466 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 467 print " cbw "
pascal@20634 468 }
pascal@20634 469 for (i = 0; i < kept; i++) print line[i]
pascal@20634 470 hold=kept=0
pascal@20634 471 }
pascal@20634 472 else if (hold == 12) {
pascal@20634 473 hold=0
pascal@20634 474 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 475 print " inc " regs[1]
pascal@20634 476 print " inc " regs[1]
pascal@20634 477 }
pascal@20634 478 else print " add " regs[1] ",2"
pascal@20634 479 }
pascal@20634 480 else if (hold == 13) {
pascal@20634 481 hold=0
pascal@20634 482 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 483 print " dec " regs[1]
pascal@20634 484 print " dec " regs[1]
pascal@20634 485 }
pascal@20634 486 else print " sub " regs[1] ",2"
pascal@20634 487 }
pascal@21569 488 else if (hold == 14) {
pascal@21569 489 if (/^ push ax$/) { hold++; next; }
pascal@21569 490 print " push dx";
pascal@21569 491 hold=0;
pascal@21569 492 }
pascal@21569 493 else if (hold == 15) {
pascal@21569 494 if (/^ pop eax$/) { hold++; next; }
pascal@21569 495 print " push dx";
pascal@21569 496 print " push ax";
pascal@21569 497 hold=0;
pascal@21569 498 }
pascal@21569 499 else if (hold == 16) {
pascal@21569 500 hold=0;
pascal@21569 501 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 502 print " push dx";
pascal@21569 503 print " push ax";
pascal@21569 504 print " pop eax";
pascal@21569 505 }
pascal@21569 506 else if (hold == 17) {
pascal@21569 507 hold=0;
pascal@21569 508 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 509 }
pascal@21576 510 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 511 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 512 /^ call near ptr @isoreset\$/ ||
pascal@21628 513 /^ call near ptr @isoopen\$/ ||
pascal@21628 514 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 515 /^ call near ptr @strhead\$/ ||
pascal@21576 516 /^ call near ptr @argstr\$/ ||
pascal@21576 517 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 518 s=$0
pascal@20458 519 # These optimisation may break ZF or CF
pascal@20485 520 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 521 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 522 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 523 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 524 sub(/mov/,"and",s); print s; next # slower
pascal@20458 525 }
pascal@20458 526 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 527 sub(/mov/,"or",s); print s; next # slower
pascal@20458 528 }
pascal@20458 529 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 530 if (/^ or [abcd]x,/) {
pascal@20458 531 split($2,args,",")
pascal@20458 532 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 533 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 534 }
pascal@20458 535 }
pascal@20458 536 if (/^ and [abcd]x,/) {
pascal@20458 537 split($2,args,",")
pascal@20459 538 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 539 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 540 }
pascal@20458 541 }
pascal@20458 542 if (/^ or e[abcd]x,/) {
pascal@20458 543 split($2,args,",")
pascal@20458 544 if (args[2] == "large") { args[2] = $3 }
pascal@20458 545 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 546 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 547 }
pascal@20458 548 }
pascal@20458 549 if (/^ and e[abcd]x,/) {
pascal@20458 550 split($2,args,",")
pascal@20458 551 if (args[2] == "large") { args[2] = $3 }
pascal@20459 552 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 553 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 554 }
pascal@20458 555 }
pascal@20458 556 if (/^ or e[abcds][ix],/) {
pascal@20458 557 split($2,args,",")
pascal@20458 558 if (args[2] == "large") { args[2] = $3 }
pascal@20458 559 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 560 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 561 }
pascal@20458 562 }
pascal@20458 563 if (/^ and e[abcds][ix],/) {
pascal@20458 564 split($2,args,",")
pascal@20458 565 if (args[2] == "large") { args[2] = $3 }
pascal@20459 566 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 567 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 568 }
pascal@20458 569 }
pascal@20543 570 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 571 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 572 split($0,args,",")
pascal@20542 573 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 574 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 575 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 576 print s "/256"; next
pascal@20542 577 }
pascal@20542 578 }
pascal@20546 579 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 580 split($0,args,",")
pascal@20543 581 if (args[2] == "large") { args[2] = $3 }
pascal@20458 582 if (isnum(args[2])) {
pascal@20546 583 if (args[2] % 16777216 == 0) {
pascal@20546 584 sub(/dword/,"byte",s)
pascal@20543 585 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 586 print s "/16777216"; next
pascal@20458 587 }
pascal@20458 588 if (args[2] % 65536 == 0) {
pascal@20546 589 sub(/dword/,"word",s)
pascal@20543 590 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 591 print s "/65536"; next
pascal@20458 592 }
pascal@20458 593 }
pascal@20458 594 }
pascal@20458 595 if (/^ mov e.x,/) {
pascal@20458 596 split($2,args,",")
pascal@20458 597 r=args[1]
pascal@20458 598 if (args[2] == "large") { args[2] = $3 }
pascal@20458 599 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 600 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 601 print " xor " r "," r
pascal@20458 602 if (args[2] == 0) next
pascal@20458 603 x=" mov " substr(r,2,1)
pascal@20458 604 if (args[2] % 256 == 0) {
pascal@20458 605 print x "h," args[2] "/256"
pascal@20458 606 }
pascal@20458 607 else { print x "l," args[2] }
pascal@20458 608 next
pascal@20458 609 }
pascal@20458 610 }
pascal@20458 611 }
pascal@21576 612 if (afterjmp) print ";" $0
pascal@21576 613 else print
pascal@21754 614 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@21754 615 /^ call near ptr @die$qpxzc/) afterjmp=1
pascal@20458 616 }