wok annotate linld/stuff/src/pipehole.awk @ rev 23991

syslinux: iso2exe/init loram case
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sun Dec 06 10:04:52 2020 +0000 (2020-12-06)
parents fb34bff6cff6
children 3d19917d3a03
rev   line source
pascal@21791 1 BEGIN { hold=0; is386=0; isload=0; isiso=0; istazboot=0; wascall=0; ishimem=0; label="none"; xlabel=""; file="" }
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@22171 6 if (/^ ; $/) next
pascal@21576 7 if (/^@.*:$/ || / endp$/) afterjmp=0
pascal@21791 8 if (/^ \.386p$/) is386=1
pascal@21791 9 if (file == "" && /debug S/) { file=$3; gsub(/\"/,"",file) }
pascal@21984 10 if (/debug S/) print " %PAGESIZE 1000"
pascal@21984 11 if (file == "tazboot.cpp") {
pascal@21984 12 if (/add si,2/) $0=" lodsw ; " $0
pascal@21984 13 if (/add si,4/) { print " lodsw"; $0=" lodsw ; " $0 }
pascal@21984 14 if (/add di,2/) $0=" scasw ; " $0
pascal@21989 15 if (/int argc/) istazboot=1
pascal@21989 16 if (istazboot == 1) {
pascal@21989 17 if (/push.*i$/) $0="; " $0
pascal@21989 18 if (/word ptr/) { istazboot=0; $0="; " $0 }
pascal@21989 19 }
pascal@21984 20 } # file == "tazboot.cpp"
pascal@21984 21 if (file == "linld.cpp") {
pascal@21984 22 if (/add si,2/) $0=" lodsw ; " $0
pascal@21984 23 if (/add di,2/) $0=" scasw ; " $0
pascal@21984 24 if (/bx,offset DGROUP:s@\+26/) sub(/mov/,";mov")
pascal@21984 25 if (islinld==1) {
pascal@21984 26 print "; " $0
pascal@21984 27 if (!/word ptr/) next
pascal@21984 28 islinld=0
pascal@21984 29 sub(/,word.*/,",di ; argv")
pascal@21984 30 if (/di,di/) { print "; " $0; next }
pascal@21984 31 }
pascal@21984 32 if (/^_main proc/) islinld=1
pascal@21984 33 if (/== 0x662F/) islinld=2
pascal@21984 34 if (islinld==2) {
pascal@21984 35 if (/cpuhaslm/) islinld=0
pascal@21984 36 if (/mov/) { print "; " $0; next }
pascal@21984 37 }
pascal@21984 38 if (/image\|initrd/) islinld=3
pascal@21984 39 if (islinld==3) {
pascal@21984 40 if (/bx,word ptr/) { islinld=0; print "; " $0; next }
pascal@21984 41 }
pascal@21984 42 if (/fileexist\$qpxzc/) islinld=4
pascal@21984 43 if (islinld==4) {
pascal@21984 44 if (/ax,-1/) print " mov bx,word ptr [si]"
pascal@21984 45 if (/ax,word ptr/) $0=" xchg ax,bx"
pascal@21984 46 if (/\[si\]$/) { islinld=0; print "; " $0; next }
pascal@21984 47 }
pascal@23804 48 if (islinld==5) {
pascal@23808 49 if (/si/ || /word ptr/) next
pascal@23806 50 if (/buf_cmdline/) {
pascal@23806 51 print " lodsw"
pascal@23806 52 islinld=0
pascal@23806 53 }
pascal@23804 54 }
pascal@23806 55 if (/do strcatb/) islinld=5
pascal@21984 56 } # file == "linld.cpp"
pascal@21791 57 if (file == "himem.cpp") {
pascal@23989 58 if (/sp,bp/ || /pop bp/) next
pascal@21984 59 if (/void load_image/) ishimem=1
pascal@21791 60 if (ishimem == 1 && is386 == 0) {
pascal@21791 61 if (/si\+8\]$/ || /si\+4\]$/ || /si\+16\]$/) next
pascal@21791 62 if (/si\+6\]$/ || /si\+2\]$/ || /si\+14\]$/) sub(/mov dx,/,"les dx,d")
pascal@23989 63 if (/si\+12\],ax/ || /si\+16\],ax/ || /DGROUP:buf\+2,ax/) sub(/,ax/,",es")
pascal@23989 64 if (/dx,dword ptr \[si\+14\]/ || /DGROUP:buf,dx/) sub(/dx/,"ax")
pascal@21984 65 }
pascal@21984 66 if (ishimem == 1) {
pascal@21984 67 if (/do \{/) ishimem=2
pascal@21984 68 if (/byte ptr DGROUP:_vcpi,0/) print " mov bx,si"
pascal@23991 69 if (/bx,si/ || /push bp/ || /bp,sp/ || /push di/ || /push si/) next
pascal@23990 70 if (/sp,2/) next
pascal@23989 71 if (/bp\+4/) {
pascal@23989 72 $0=" xchg ax,si"
pascal@23989 73 }
pascal@21984 74 }
pascal@21984 75 if (ishimem == 2) {
pascal@21984 76 if (/movzx/) print " cwde"
pascal@23991 77 if (/bp-2/) next
pascal@21984 78 if (/storepage.bufv/) {
pascal@21984 79 print " inc ax"
pascal@21984 80 print " push ax"
pascal@21984 81 }
pascal@21984 82 if (/buf \+= size;/) {
pascal@21984 83 print " pop ax"
pascal@21984 84 }
pascal@23989 85 if (/endp/) ishimem=0
pascal@21791 86 }
pascal@21791 87 } # file == "himem.cpp"
pascal@21791 88 if (file == "load.cpp") {
pascal@23989 89 if (/load_image\(/) {
pascal@23989 90 if (isload == 3) isload=13
pascal@23989 91 else isload=14
pascal@23989 92 }
pascal@23989 93 if (isload == 14) { # LOAD.LST
pascal@23989 94 if (/call/) {
pascal@23989 95 print " xchg ax,di"
pascal@23989 96 $0=" jmp short load_imagez"
pascal@23989 97 }
pascal@23989 98 if (/ret/) isload=0
pascal@23989 99 if (/pop/ || /ret/ || /push/) next
pascal@23989 100 }
pascal@23989 101 if (isload == 13) { # LOAD.LST
pascal@23991 102 if (/pop/) isload=3
pascal@23991 103 if (/push/ || /call/ || /pop/) next
pascal@23989 104 }
pascal@22152 105 if (/i\+21\],513$/) isload=11
pascal@21984 106 if (isload == 12) { # LOAD.LST
pascal@21984 107 if (/cmp/) next
pascal@21984 108 if (/jb/) isload=0
pascal@21984 109 sub(/jb/,"jcxz")
pascal@21984 110 }
pascal@21984 111 if (isload == 11) { # LOAD.LST
pascal@21984 112 if (/cmp/) {
pascal@21984 113 print " mov cx,513"
pascal@22152 114 sub(/cmp /,"sub cx,")
pascal@22152 115 sub(/,513/,"")
pascal@21984 116 }
pascal@21984 117 if (/jb/) isload=12
pascal@21984 118 sub(/jb/,"ja")
pascal@21984 119 }
pascal@22170 120 sub(/_imgs\+65534/,"_imgs-2")
pascal@22152 121 if (/m, _rm_size/) isload=10
pascal@21791 122 if (isload == 10) { # LOAD.LST
pascal@21791 123 if (/^ je /) next
pascal@21791 124 if (/ptr @die\$qpxzc/) {
pascal@21791 125 $0=" jne @die@"
pascal@21791 126 isload=0
pascal@21791 127 }
pascal@21791 128 }
pascal@21791 129 if (/setup_sects == 0/) isload=9
pascal@21791 130 if (isload == 9) { # LOAD.LST
pascal@21791 131 sub(/,0/,",al")
pascal@21791 132 if (/jne/) isload=0
pascal@21791 133 }
pascal@21784 134 if (/fallback\)\[1\] == 0/) isload=8
pascal@21784 135 if (isload == 8) { # LOAD.LST
pascal@21784 136 if (/load_image/) isload=0
pascal@21784 137 else next
pascal@21784 138 }
pascal@21757 139 if (/cmd_line_ptr =/ && is386 == 0) isload=7
pascal@21757 140 if (isload == 7) { # LOAD.LST
pascal@22181 141 if (/add/ || /xor/ || /extrn/ || /N_LXLSH@/ || /cl,4/ || /,ax/) next
pascal@22170 142 if (/enable A20 if needed/) { print nextinst; isload=0 }
pascal@22152 143 if (/i-463/) $0=" mov bx,-463"
pascal@22170 144 if (/i-465/) {
pascal@22170 145 sub(/465/,"2"); sub(/\[/,"[bx+")
pascal@22170 146 nextinst=$0; sub(/-2\],-23745/,"],8000h",nextinst)
pascal@22170 147 }
pascal@21757 148 if (/,dx/) {
pascal@21757 149 print " mov cl,12"
pascal@21757 150 print " shr ax,cl"
pascal@22181 151 print " mov bx,55"
pascal@21757 152 sub(/dx/,"ax")
pascal@21757 153 }
pascal@21757 154 }
pascal@23991 155 if (/_version_string,0/) {
pascal@23991 156 print " mov ax,si"
pascal@23991 157 print " push di"
pascal@23991 158 isload=6
pascal@23991 159 }
pascal@21757 160 if (isload == 6) { # LOAD.LST
pascal@23991 161 if (/si\+2/) {
pascal@23991 162 print " cmpsw"
pascal@23991 163 next
pascal@23991 164 }
pascal@23989 165 if (/les/) sub(/bx,/,"di,")
pascal@23991 166 if (/bx\+4/ || /es:/ || /call/ || /pop/ || /ret/) next
pascal@23989 167 if (/si\+6/) {
pascal@23989 168 print " movsw"
pascal@23989 169 print " movsw"
pascal@23989 170 print " movsw"
pascal@23989 171 print " movsw"
pascal@23991 172 print "load_imagez:"
pascal@21757 173 next
pascal@21757 174 }
pascal@21757 175 }
pascal@21757 176 if (/version_string = /) isload=5
pascal@21757 177 if (isload == 5) { # LOAD.LST
pascal@21757 178 sub(/ax,/,"bx,")
pascal@21757 179 if (/_version_string,/) isload=0
pascal@21757 180 if (/mov bx,ax/) next
pascal@21757 181 }
pascal@22180 182 if (/_base_himem\+2/ && is386 == 0) isload=4
pascal@22180 183 if (isload == 4) { # LOAD.LST
pascal@22180 184 if (/_base_himem\+2/) next
pascal@22180 185 if (/_base_himem$/) {
pascal@22180 186 sub(/mov dx,/,"les dx,d")
pascal@21757 187 }
pascal@21791 188 sub(/,ax/,",es")
pascal@22181 189 if (/add ax,word ptr/) $0=" add ax,cx"
pascal@22181 190 if (/i\+29\],0/) {
pascal@22181 191 sub(/,0$/,"")
pascal@22181 192 sub(/cmp /,"mov cx,")
pascal@22181 193 }
pascal@22181 194 sub(/je/,"jcxz")
pascal@22181 195 if (/@strcpy/) isload=0
pascal@21757 196 }
pascal@21754 197 if (/void load_initrd\(\)/) isload=3
pascal@21754 198 if (isload == 3) { # LOAD.LST
pascal@23991 199 if (/short @2@198/) sub(/@2@198/,"load_initrd_ret")
pascal@23991 200 if( /jmp/) {
pascal@23991 201 print "load_initrd_ret:"
pascal@23991 202 print " pop si"
pascal@23991 203 print " ret"
pascal@23991 204 next
pascal@23991 205 }
pascal@21754 206 sub(/\[di/,"[bx")
pascal@21754 207 sub(/\di,/,"bx,")
pascal@21754 208 }
pascal@21750 209 if (/vid_mode = vid_mode/) isload=2
pascal@21750 210 if (isload == 2) { # LOAD.LST
pascal@21750 211 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 212 sub(/je/,"jcxz")
pascal@21750 213 if (/ax,word/) next
pascal@21750 214 sub(/,ax/,",cx")
pascal@21757 215 if (/version_string/ || /starting linux 1\.3\.73/) isload=0
pascal@21750 216 }
pascal@22677 217 if (/die\(not_kernel/ || /_rm_size=0x200/ || /heap_top = _rm_buf/) isload=1
pascal@21750 218 if (isload == 1) { # LOAD.LST
pascal@21791 219 if (/ptr .die\$qpxzc/) $0="@die@:\n" $0
pascal@21729 220 if (/mov al,byte ptr/ && is386) {
pascal@22152 221 sub(/mov al/,"movzx eax")
pascal@21729 222 }
pascal@21791 223 if (is386 == 0) {
pascal@22152 224 if (/m->size -= _rm_size/) print " cwd"
pascal@21791 225 sub(/,0$/,",dx")
pascal@21791 226 }
pascal@21729 227 if (/ax,word ptr/) next
pascal@21729 228 if (/^ call/) isload=0
pascal@21729 229 }
pascal@21791 230 } # file == "load.cpp"
pascal@21791 231 if (file == "iso9660.cpp") {
pascal@23989 232 if (/x->curpos \+= x->entrysize/) isiso=14
pascal@23989 233 if (isiso == 14) { # ISO9660.LST
pascal@23989 234 if (/ax,ax/) {
pascal@23989 235 print "return0:"
pascal@23989 236 isiso=0
pascal@23989 237 }
pascal@23989 238 }
pascal@23988 239 if (/p = x->buffer \+ 34/) isiso=13
pascal@23988 240 if (isiso == 13) { # ISO9660.LST
pascal@23988 241 if (/di,si/) $0=" xchg ax,bx"
pascal@23988 242 if (/di,ax/) $0=" lea di,[si+bx+70]"
pascal@23988 243 if (/di,70/) {
pascal@23988 244 isiso=0
pascal@23988 245 next
pascal@23988 246 }
pascal@23988 247 }
pascal@23870 248 if (/register len/) isiso=12
pascal@23870 249 if (isiso == 12) { # ISO9660.LST
pascal@23870 250 sub(/mov dx,ax/,"xchg ax,bx")
pascal@23870 251 if (/bx,dx/) next
pascal@23870 252 sub(/i,dx/,"i,bx")
pascal@23870 253 if (/while/) isiso=0
pascal@23870 254 }
pascal@23864 255 if (/while \(\*\+\+s/) isiso=11
pascal@23864 256 if (isiso == 11) { # ISO9660.LST
pascal@23864 257 if (/cmp/ || /filename2open/) isiso=0
pascal@23864 258 if (/cmp/) next
pascal@23864 259 if (/mov/) {
pascal@23864 260 sub(/mov bx,/,"cmp byte ptr [")
pascal@23864 261 sub(/i$/,"i],0")
pascal@23864 262 }
pascal@23864 263 }
pascal@23863 264 if (/curpos >= SECT/) isiso=10
pascal@23863 265 if (isiso == 10) { # ISO9660.LST
pascal@23863 266 if (/cmp/) {
pascal@23863 267 sub(/cmp /,"mov bx,")
pascal@23863 268 sub(/i.*/,"i]")
pascal@23863 269 print
pascal@23863 270 $0=" cmp bh,2048/256"
pascal@23863 271 }
pascal@23863 272 if (/mov/) {
pascal@23863 273 isiso=0
pascal@23863 274 next
pascal@23863 275 }
pascal@23863 276 }
pascal@21791 277 if (/<< SECTORBITS/) isiso=9
pascal@21791 278 if (isiso == 9) { # ISO9660.LST
pascal@21791 279 if (/dx,/) next
pascal@21791 280 sub(/mov ax,/,"les ax,d")
pascal@21791 281 if (/^ call/) {
pascal@21791 282 print " extrn N_LXLSH@ES:near"
pascal@21791 283 sub(/N_LXLSH@/,"N_LXLSH@ES")
pascal@21791 284 isiso=0
pascal@21791 285 }
pascal@21791 286 }
pascal@21791 287 if (/filesize =/) isiso=8
pascal@21791 288 if (isiso == 8) { # ISO9660.LST
pascal@21791 289 if (/ax,/) next
pascal@21791 290 sub(/mov dx,/,"les dx,d")
pascal@21791 291 sub(/,ax/,",es")
pascal@21791 292 if (/filemod/) isiso=0
pascal@21791 293 }
pascal@21754 294 if (/CD001/) isiso=7
pascal@21754 295 if (isiso == 7) { # ISO9660.LST
pascal@21754 296 sub(/mov ax,-1/,"dec ax")
pascal@21754 297 if (/jmp/) isiso=0
pascal@21754 298 }
pascal@21754 299 if (/int len =/) isiso=6
pascal@21754 300 if (isiso == 6) { # ISO9660.LST
pascal@21754 301 if (/dx,ax/) next
pascal@21754 302 sub(/ax/,"dx")
pascal@21754 303 sub(/cx,di/,"bx,di")
pascal@21754 304 sub(/cx,dx/,"bx,ax")
pascal@21754 305 sub(/di,dx/,"di,ax")
pascal@21754 306 if (/while/) isiso=2
pascal@21754 307 }
pascal@21754 308 if (/entrysize =/) isiso=5
pascal@21754 309 if (isiso == 5) { # ISO9660.LST
pascal@21754 310 if (/ax,ax/) next
pascal@21754 311 sub(/ax/,"cx")
pascal@21754 312 sub(/je/,"jcxz")
pascal@21754 313 if (/return/) isiso=0
pascal@21754 314 }
pascal@21735 315 if (/x->curdirsize == 0xFFFF/) isiso=4
pascal@21735 316 if (isiso == 4) { # ISO9660.LST
pascal@21754 317 sub(/DGROUP:_isostate\+18/,"[si+18]")
pascal@21754 318 sub(/DGROUP:_isostate\+20/,"[si+20]")
pascal@21747 319 if (/goto restarted/) isiso=0
pascal@21735 320 }
pascal@21791 321 } # file == "iso9660.cpp"
pascal@21791 322 if (file == "iso9660.cpp" || file == "tazboot.cpp") {
pascal@21754 323 if (/do s\+\+; while/) isiso=3
pascal@21801 324 if (/for \(p = s; \*s && \*s \!=/) isiso=3 # tazboot/main
pascal@21750 325 if (isiso == 3) { # ISO9660.LST, TAZBOOT.LST
pascal@21754 326 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 327 if (/mov byte ptr \[bp-5\],al/) $0=" push ax"
pascal@21754 328 if (/mov al,byte ptr \[bp-5\]/) $0=" pop ax"
pascal@21754 329 if (/inc /) { r=$2; print; next }
pascal@21754 330 if (/al,0/) print " mov al,[" r "]"
pascal@21754 331 if (/al,byte ptr/) sub(/mov/,"xchg")
pascal@21754 332 if (/byte ptr \[.*\],0/) next
pascal@21791 333 if (/jmp/) {
pascal@21791 334 print " mov bx,si"
pascal@21791 335 $0=" db 0A8h ; test al,xx instead of " $0
pascal@21791 336 }
pascal@21754 337 if (/word ptr \[bp-4\]/) next
pascal@21754 338 if (/\) s\+\+;/ || /\],-1/) isiso=0
pascal@21735 339 }
pascal@21791 340 } # file == "iso9660.cpp" || file == "tazboot.cpp"
pascal@21791 341 if (file == "iso9660.cpp") {
pascal@21735 342 if (/endname = NULL/) isiso=2
pascal@21735 343 if (isiso == 2) { # ISO9660.LST
pascal@21735 344 if (/mov bx,cx/) next
pascal@21735 345 gsub(/cx/,"bx")
pascal@21754 346 sub(/DGROUP:_isostate\+35/,"[si+35]")
pascal@21735 347 }
pascal@21735 348 if (/const char \*n = name/) isiso=1
pascal@21735 349 if (isiso == 1) { # ISO9660.LST
pascal@21735 350 if ((/mov word ptr \[si\+32\],ax/ ) ||
pascal@21754 351 (/mov ax,word ptr \[si\+2\]/) ||
pascal@21735 352 (/bx,word ptr \[si\+32\]/) || (/ax,dx/)) next
pascal@21729 353 if (/dx,/) sub(/dx/,"ax")
pascal@21754 354 if ((/sub ax,word ptr \[si\+2\]/) ||
pascal@21754 355 (/\[si\+16\]/) || (/ax,di/)) sub(/ax/,"bx")
pascal@21754 356 if (/add word ptr \[si\+32\],ax/) $0=" add bx,word ptr [si+16]"
pascal@21735 357 if (/al,/ || /,al/) sub(/al/,"cl")
pascal@21754 358 if (/cmp byte ptr \[si\+34\],0/) $0=" or cl,cl"
pascal@23989 359 if (/ax,ax/) next
pascal@23989 360 if (/short @.@506/) $0=" jmp return0"
pascal@21735 361 if (/jne @@0$/) next
pascal@23984 362 if (/jmp @.@58$/) sub(/jmp/,"je")
pascal@21754 363 sub(/mov ax,-1/,"dec ax")
pascal@21754 364 }
pascal@21791 365 } # file == "iso9660.cpp"
pascal@21754 366 if (/endp/) { xlabel = ""; goto2=0 }
pascal@21801 367 if (/isoopen\(s\+7\)/ && xlabel == "") goto2=1 # tazboot/bootiso
pascal@21801 368 if (/_vid_mode,ax/ && xlabel == "") goto2=1 # tazboot/main
pascal@21801 369 if (/_initrd_name,si/ && xlabel == "") goto2=1 # tazboot/main
pascal@21801 370 if (/_base_himem\+2,/ && xlabel == "@") goto2=1 # tazboot/bootiso tazboot/main
pascal@21801 371 if (/DGROUP:_skip_alloc/ && xlabel == "@") goto2=1 # tazboot/bootiso tazboot/main
pascal@21754 372 if (/puts\(cmdline\)/ && xlabel == "@@") goto2=1
pascal@21754 373 if (goto2 == 1 && /jmp/) { # TAZBOOT.LST && LINLD.LST
pascal@21754 374 print $NF xlabel "@:"
pascal@21754 375 label=$NF
pascal@21754 376 }
pascal@21754 377 if (goto2 > 0 && label == $NF) {
pascal@21754 378 $0=$0 xlabel
pascal@21754 379 if (goto2++ == 1) xlabel=xlabel "@"
pascal@21754 380 }
pascal@21801 381 if (file == "tazboot.cpp" && /close\(x/) isotazboot=16
pascal@21801 382 if (isotazboot == 160) { # TAZBOOT.LST
pascal@21801 383 $0="; " $0
pascal@21801 384 if (/ret/) isotazboot=0
pascal@21801 385 }
pascal@21801 386 if (isotazboot == 16) { # TAZBOOT.LST
pascal@21801 387 if (/@.@/) {
pascal@21801 388 isotazboot=160
pascal@21801 389 next
pascal@21801 390 }
pascal@21801 391 }
pascal@21801 392 if (file == "tazboot.cpp" && /jne @@2/) isotazboot=15
pascal@21801 393 if (isotazboot == 15) { # TAZBOOT.LST
pascal@21801 394 if (/@.@/) {
pascal@21801 395 print " pop di"
pascal@21801 396 print " pop si"
pascal@21801 397 print " mov sp,bp"
pascal@21801 398 print " pop bp"
pascal@21801 399 print " ret"
pascal@21801 400 next
pascal@21801 401 }
pascal@21801 402 if (/skip_alloc/) isotazboot=0
pascal@21801 403 }
pascal@21791 404 if (/if\(\*s>=/) isotazboot=14
pascal@21791 405 if (isotazboot == 14) { # LINLD.LST
pascal@21791 406 if (/jmp/) {
pascal@21791 407 $0=" db 0A9h ; test ax,xxxx instead of " $0
pascal@21791 408 isotazboot=0
pascal@21791 409 }
pascal@21791 410 }
pascal@21801 411 if (file == "tazboot.cpp" && /; s \+= 4/) isotazboot=13 # tazboot/main
pascal@21791 412 if (isotazboot == 13) { # TAZBOOT.LST
pascal@21791 413 if (/si,4/) $0=" lea bx,[si+4]"
pascal@21791 414 if (/bx,si/) next
pascal@21791 415 if (/DGROUP:_topmem/ || /set_iso/) isotazboot=0
pascal@21791 416 }
pascal@21801 417 if (file == "tazboot.cpp" && /case 0x652F:/) isotazboot=12 # tazboot/main
pascal@21791 418 if (isotazboot == 12) { # TAZBOOT.LST
pascal@21791 419 sub(/si,word/,"bx,word")
pascal@21791 420 if (/short/) isotazboot=0
pascal@21791 421 }
pascal@21801 422 if (/return load_kernel/) isotazboot=11 # tazboot/isokernel
pascal@21791 423 if (isotazboot == 11) { # TAZBOOT.LST
pascal@21791 424 sub(/call/,"jmp")
pascal@21791 425 if (/ret/ || /pop/) next
pascal@21791 426 if (/endp/) isotazboot=0
pascal@21791 427 }
pascal@21801 428 if (/cmdline=s\+=3/ || /magic \!= 0/ || /&root_dev =/) { isotazboot=10; j="" } # ,tazboot/bootiso,tazboot/main
pascal@21754 429 if (isotazboot == 10) { # TAZBOOT.LST && LINLD.LST
pascal@21754 430 if (/je/ || /jne/) { j=$1; next }
pascal@21754 431 if (/jmp/) {
pascal@21754 432 if (j=="jne") sub(/jmp/,"je")
pascal@21754 433 else if (j=="je") sub(/jmp/,"jne")
pascal@21754 434 isotazboot=0
pascal@21754 435 }
pascal@21754 436 }
pascal@21801 437 if (/static const unsigned long initrddesc = 18L/) isotazboot=9 # tazboot/bootiso
pascal@21754 438 if (isotazboot == 9) { # TAZBOOT.LST
pascal@21754 439 if (/,0/) {
pascal@21754 440 split($4,y,",")
pascal@21754 441 print " mov bx,offset " y[1]
pascal@21801 442 sub(/DGROUP:.*,/,"[bx],")
pascal@21754 443 }
pascal@21801 444 if (/mov/ && $3 == y[1]) next
pascal@21801 445 if (/je/) next
pascal@21801 446 if (/jmp/) sub(/jmp/,"jne")
pascal@21801 447 sub(/ax,offset/,"bx,offset")
pascal@21801 448 if (/bx,ax/) { isotazboot=0; next }
pascal@21729 449 }
pascal@21801 450 if (/isoopen\(s\+7\) != -1/) isotazboot=8 # tazboot/bootiso
pascal@21750 451 if (isotazboot == 8) { # TAZBOOT.LST
pascal@21801 452 sub(/\[bx/,"[si")
pascal@21801 453 if (/bx,si/) next
pascal@21750 454 if (/magic/) isotazboot=0
pascal@21750 455 }
pascal@21801 456 if (/isoopen\(\"bzImage\"\)/) isotazboot=7 # tazboot/bootiso
pascal@21750 457 if (isotazboot == 7) { # TAZBOOT.LST
pascal@21791 458 if (/inc/ || /,al/) next
pascal@21791 459 if (/al,byte/) sub (/mov al,/,"inc ")
pascal@21750 460 if (/isokernel/) isotazboot=0
pascal@21750 461 }
pascal@21801 462 if (/if \(c\) s\+\+;/) isotazboot=6 # tazboot/main
pascal@21750 463 if (isotazboot == 6) { # TAZBOOT.LST
pascal@21750 464 if (/cmp/) {
pascal@21750 465 $0=" cmp al,0"
pascal@21750 466 isotazboot=0
pascal@21750 467 }
pascal@21750 468 }
pascal@21801 469 if (/static void next_chunk/) isotazboot=5 # tazboot/next_chunk
pascal@21791 470 if (isotazboot == 501) {
pascal@21791 471 if (/ret/) {
pascal@21791 472 print "@1@86:"
pascal@21791 473 isotazboot=0
pascal@21791 474 }
pascal@21791 475 }
pascal@21754 476 if (isotazboot == 5 || isotazboot == 500) { # TAZBOOT.LST
pascal@21750 477 if (/cx,ax/) $0=" xchg ax,bx"
pascal@21754 478 if (/ax,word ptr \[si\+28\]/ && isotazboot == 500) next
pascal@21750 479 if (/bx,cx/) next
pascal@21754 480 if (/push/ || /pop/ || /bp,sp/ || /si,/) next
pascal@21754 481 sub(/\[si/,"[di")
pascal@21754 482 if (/initrd_info/) isotazboot=500
pascal@21791 483 if (/bx\+6\]/) next
pascal@21791 484 if (/bx\+4\]/) sub(/mov dx,/,"les dx,d")
pascal@21791 485 sub(/di\+24\],ax/,"di+24],es")
pascal@21791 486 sub(/call/,"jmp")
pascal@21791 487 if (/ret/ || /pop/ || /^@1@86:/) next
pascal@21791 488 if (/_isostate\+14/) next
pascal@21791 489 if (/_isostate\+12/) {
pascal@21791 490 sub(/mov ax,/,"les ax,d")
pascal@21791 491 print
pascal@21791 492 print " mov dx,es"
pascal@21791 493 next
pascal@21791 494 }
pascal@21791 495 if (/ax,-4/) isotazboot++
pascal@21750 496 }
pascal@21801 497 if (/0x7FF0/) isotazboot=4 # tazboot/bootiso
pascal@21750 498 if (isotazboot == 4) { # TAZBOOT.LST
pascal@21750 499 if (/ax,word ptr/) {
pascal@21750 500 print " mov ax,32752"
pascal@21754 501 print " cwd"
pascal@21750 502 sub(/mov/,"sub")
pascal@21750 503 }
pascal@21750 504 if (/bx,/ || /cx,/ || /dx,/) next
pascal@21754 505 sub(/,0/,",dx")
pascal@21754 506 sub(/,bx/,",dx")
pascal@21750 507 sub(/,cx/,",ax")
pascal@21754 508 if (/@addinitrd\$qv/) isotazboot=0
pascal@21750 509 }
pascal@21801 510 if (/c = x->filename/) isotazboot=3 # tazboot/bootiso
pascal@21750 511 if (isotazboot == 3) { # TAZBOOT.LST
pascal@21750 512 if (/ax,/) $0=" xchg ax,bx"
pascal@21750 513 if (/\]$/) next
pascal@21750 514 if (/@strcpy\$qpxzct1/) isotazboot=0
pascal@21750 515 }
pascal@21801 516 if (/base_himem = memtop/) isotazboot=2 # tazboot/bootiso
pascal@21750 517 if (isotazboot == 2) { # TAZBOOT.LST
pascal@21801 518 if (/word ptr \[si\+2\],0/) {
pascal@21754 519 print s; hold=0
pascal@21801 520 print " mov bx,word ptr [si+2]"
pascal@21752 521 $0=" or bx,bx"
pascal@21752 522 }
pascal@21752 523 if (/\[bp-4\],ax/) sub(/ax/,"bx")
pascal@21801 524 if (/ax,word ptr \[si\+2\]/ || /bx,ax/) next
pascal@21791 525 if (/_base_himem\+2,dx/) {
pascal@21791 526 print " mov bx,offset DGROUP:_base_himem+2"
pascal@21791 527 }
pascal@21791 528 sub(/DGROUP:_base_himem,/,"[bx-2],")
pascal@21791 529 sub(/DGROUP:_base_himem\+2,/,"[bx],")
pascal@21791 530 sub(/DGROUP:_base_himem\+3,/,"[bx+1],")
pascal@21750 531 if (/@strcmp\$qpxzct1/) isotazboot=0
pascal@21750 532 }
pascal@21801 533 if (/static void addinitrd/) isotazboot=100 # tazboot/addinitrd
pascal@21751 534 if (isotazboot == 100) { # TAZBOOT.LST
pascal@21751 535 if (/cx,ax/) {
pascal@21754 536 print " mov si,offset _isostate+8"
pascal@21757 537 print " push ds"
pascal@21757 538 print " pop es"
pascal@21754 539 print " xchg ax,di"
pascal@21751 540 print " movsw"
pascal@21751 541 print " movsw"
pascal@21751 542 print " movsw"
pascal@21751 543 print " movsw"
pascal@21754 544 $0=" xchg ax,di"
pascal@21751 545 }
pascal@21751 546 if (/mov/ && !/si/ && !/cl/) next
pascal@21754 547 if (/void load_initrds/) isotazboot=101
pascal@21751 548 }
pascal@21754 549 if (isotazboot == 101 || isotazboot == 102) { # TAZBOOT.LST
pascal@21754 550 sub(/\[si/,"[di"); sub(/si,/,"di,"); sub(/si$/,"di")
pascal@21754 551 sub(/DGROUP:_imgs\+38$/,"[di+38-32]")
pascal@21754 552 sub(/DGROUP:_imgs\+40$/,"[di+40-32]")
pascal@21754 553 if (/isofd/) isotazboot=102
pascal@21754 554 if (/push/ && isotazboot == 102) next
pascal@21754 555 if (/pop/ && isotazboot == 102) next
pascal@21754 556 if (/load_initrd/) isotazboot=101
pascal@21754 557 if (/isokernel/) isotazboot=103
pascal@21754 558 }
pascal@21754 559 if (isotazboot > 102) { # TAZBOOT.LST
pascal@21754 560 if (/push/ || /pop/) next
pascal@21754 561 sub(/\[si/,"[bx")
pascal@21750 562 sub(/si,/,"bx,")
pascal@21750 563 if (/static void bootiso/) isotazboot=0
pascal@21750 564 }
pascal@21729 565 if (wascall) {
pascal@21729 566 if (rcall != "") {
pascal@21729 567 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 568 else print " xchg ax," rcall
pascal@21729 569 wascall=0
pascal@21729 570 }
pascal@21729 571 else if (/^ mov .i,ax$/) {
pascal@21729 572 split($2,y,",")
pascal@21729 573 rcall=y[1]
pascal@21729 574 next
pascal@21729 575 }
pascal@21729 576 else wascall=0
pascal@21729 577 }
pascal@21729 578 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 579 if (hold == 0) {
pascal@20458 580 s=$0
pascal@20534 581 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 582 r=$2; kept=0
pascal@20458 583 hold=1; split($2,regs,","); next
pascal@20458 584 }
pascal@21729 585 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 586 hold=2; r=$2; next
pascal@20458 587 }
pascal@20458 588 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 589 hold=3; split($2,regs,","); next
pascal@20458 590 }
pascal@20458 591 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 592 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 593 split($0,regs,",")
pascal@20543 594 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 595 (regs[2] % 256) == 0) {
pascal@20549 596 hold=5; next
pascal@20543 597 }
pascal@20543 598 }
pascal@20630 599 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 600 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 601 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 602 hold=8; split($2,regs,","); next
pascal@20630 603 }
pascal@20634 604 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 605 if (/^ add [abcds][ix],2$/) {
pascal@20634 606 split($2,regs,","); hold=12; next
pascal@20634 607 }
pascal@20634 608 if (/^ sub [abcds][ix],2$/) {
pascal@20634 609 split($2,regs,","); hold=13; next
pascal@20634 610 }
pascal@21569 611 if (/^ push dx$/) {
pascal@21569 612 hold=14; next;
pascal@21569 613 }
pascal@20458 614 }
pascal@20458 615 else if (hold == 1) {
pascal@20543 616 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 617 hold=0; split($2,args,","); op=""
pascal@20458 618 if ($1 == "add") op="+"
pascal@20458 619 if ($1 == "sub") op="-"
pascal@20751 620 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 621 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 622 if (op != "" && regs[1] == args[1]) {
pascal@20543 623 if (isnum(args[2])) {
pascal@20630 624 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 625 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@22288 626 sub(/\+-/,"-",line[0])
pascal@20630 627 hold=10; next
pascal@20543 628 }
pascal@20543 629 line[kept++]=$0
pascal@20543 630 hold=1
pascal@20458 631 next
pascal@20458 632 }
pascal@20520 633 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 634 print " xchg " r
pascal@20520 635 }
pascal@20543 636 else print s
pascal@20543 637 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 638 }
pascal@20458 639 else if (hold == 2) {
pascal@21729 640 split($0,args,",")
pascal@21729 641 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 642 split($2,args,",")
pascal@21729 643 hold=0; print s
pascal@20458 644 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 645 }
pascal@20458 646 else if (hold == 3) {
pascal@20458 647 hold=0
pascal@21576 648 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 649 if (/^ add [abcds][ix],/) {
pascal@20458 650 split($2,regs2,",")
pascal@20458 651 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 652 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 653 print t; print s; next
pascal@20458 654 }
pascal@20458 655 }
pascal@20458 656 print s
pascal@20458 657 }
pascal@20458 658 else if (hold == 4) {
pascal@20458 659 hold=0
pascal@20458 660 if (/^ push eax$/) {
pascal@20458 661 print " push 0"; print " push ax"; next
pascal@20458 662 } else { print s }
pascal@20458 663 }
pascal@20543 664 else if (hold == 5) {
pascal@20543 665 hold=0
pascal@20543 666 if ($1 == "jae" || $1 == "jb") {
pascal@20544 667 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 668 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 669 s = s "/256"
pascal@20543 670 }
pascal@20543 671 print s
pascal@20543 672 }
pascal@20630 673 else if (hold == 6) {
pascal@20630 674 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 675 line[kept++]=$0
pascal@20630 676 next
pascal@20630 677 }
pascal@20630 678 p=$0
pascal@20630 679 if (/^ movzx eax,ax$/) {
pascal@20630 680 s=" mov eax,cs"; p=""
pascal@20630 681 }
pascal@20630 682 print s
pascal@20630 683 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 684 if (p != "") print p
pascal@20630 685 hold=0; next
pascal@20630 686 }
pascal@20630 687 else if (hold == 7) {
pascal@20458 688 hold=0
pascal@20520 689 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 690 print " extrn N_LXURSH@4:near"
pascal@20520 691 print " call near ptr N_LXURSH@4"
pascal@20520 692 next
pascal@20520 693 }
pascal@20528 694 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 695 print " extrn N_LXLSH@4:near"
pascal@20528 696 print " call near ptr N_LXLSH@4"
pascal@20528 697 next
pascal@20528 698 }
pascal@20520 699 print s
pascal@20458 700 }
pascal@20630 701 else if (hold == 8) {
pascal@20630 702 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 703 hold=0
pascal@20630 704 print s
pascal@20630 705 }
pascal@20630 706 else if (hold == 9) {
pascal@20630 707 hold=0; split($2,args,",")
pascal@20630 708 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 709 print; print " or ax,ax"; print p; next
pascal@20630 710 }
pascal@20630 711 print s; print p;
pascal@20630 712 }
pascal@20630 713 else if (hold == 10) {
pascal@20751 714 split($2,args,","); op=""
pascal@20751 715 if ($1 == "add") op="+"
pascal@20751 716 if ($1 == "sub") op="-"
pascal@20751 717 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 718 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 719 if (op != "" && isnum(args[2])) {
pascal@20751 720 split(line[0],reg,",")
pascal@20751 721 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 722 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 723 next
pascal@20751 724 }
pascal@20751 725 }
pascal@20630 726 hold=0
pascal@20630 727 if (/^ mov [sd]i,ax$/) {
pascal@20630 728 split($2,args,",")
pascal@20630 729 for (i = 0; i < kept; i++) {
pascal@20630 730 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 731 }
pascal@20630 732 next
pascal@20630 733 }
pascal@20630 734 for (i = 0; i < kept; i++) print line[i]
pascal@20630 735 }
pascal@20634 736 else if (hold == 11) {
pascal@20634 737 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 738 line[kept++]=$0; next
pascal@20634 739 }
pascal@20634 740 split($2,args,",")
pascal@20634 741 if (/^ mov cl,/) {
pascal@20634 742 split($2,args,",")
pascal@20634 743 if (args[2] >= 8) {
pascal@20634 744 line[kept++]=$0; next
pascal@20634 745 }
pascal@20634 746 }
pascal@20634 747 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 748 print " cbw "
pascal@20634 749 }
pascal@20634 750 for (i = 0; i < kept; i++) print line[i]
pascal@20634 751 hold=kept=0
pascal@20634 752 }
pascal@20634 753 else if (hold == 12) {
pascal@20634 754 hold=0
pascal@20634 755 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 756 print " inc " regs[1]
pascal@20634 757 print " inc " regs[1]
pascal@20634 758 }
pascal@20634 759 else print " add " regs[1] ",2"
pascal@20634 760 }
pascal@20634 761 else if (hold == 13) {
pascal@20634 762 hold=0
pascal@20634 763 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 764 print " dec " regs[1]
pascal@20634 765 print " dec " regs[1]
pascal@20634 766 }
pascal@20634 767 else print " sub " regs[1] ",2"
pascal@20634 768 }
pascal@21569 769 else if (hold == 14) {
pascal@21569 770 if (/^ push ax$/) { hold++; next; }
pascal@21569 771 print " push dx";
pascal@21569 772 hold=0;
pascal@21569 773 }
pascal@21569 774 else if (hold == 15) {
pascal@21569 775 if (/^ pop eax$/) { hold++; next; }
pascal@21569 776 print " push dx";
pascal@21569 777 print " push ax";
pascal@21569 778 hold=0;
pascal@21569 779 }
pascal@21569 780 else if (hold == 16) {
pascal@21569 781 hold=0;
pascal@21569 782 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 783 print " push dx";
pascal@21569 784 print " push ax";
pascal@21569 785 print " pop eax";
pascal@21569 786 }
pascal@21569 787 else if (hold == 17) {
pascal@21569 788 hold=0;
pascal@21569 789 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 790 }
pascal@21576 791 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 792 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 793 /^ call near ptr @isoreset\$/ ||
pascal@21628 794 /^ call near ptr @isoopen\$/ ||
pascal@21628 795 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 796 /^ call near ptr @strhead\$/ ||
pascal@23984 797 /^ call near ptr @strcmp\$/ ||
pascal@21576 798 /^ call near ptr @argstr\$/ ||
pascal@21576 799 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 800 s=$0
pascal@20458 801 # These optimisation may break ZF or CF
pascal@20485 802 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 803 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 804 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 805 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 806 sub(/mov/,"and",s); print s; next # slower
pascal@20458 807 }
pascal@20458 808 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 809 sub(/mov/,"or",s); print s; next # slower
pascal@20458 810 }
pascal@20458 811 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 812 if (/^ or [abcd]x,/) {
pascal@20458 813 split($2,args,",")
pascal@20458 814 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 815 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 816 }
pascal@20458 817 }
pascal@20458 818 if (/^ and [abcd]x,/) {
pascal@20458 819 split($2,args,",")
pascal@20459 820 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 821 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 822 }
pascal@20458 823 }
pascal@20458 824 if (/^ or e[abcd]x,/) {
pascal@20458 825 split($2,args,",")
pascal@20458 826 if (args[2] == "large") { args[2] = $3 }
pascal@20458 827 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 828 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 829 }
pascal@20458 830 }
pascal@20458 831 if (/^ and e[abcd]x,/) {
pascal@20458 832 split($2,args,",")
pascal@20458 833 if (args[2] == "large") { args[2] = $3 }
pascal@20459 834 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 835 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 836 }
pascal@20458 837 }
pascal@20458 838 if (/^ or e[abcds][ix],/) {
pascal@20458 839 split($2,args,",")
pascal@20458 840 if (args[2] == "large") { args[2] = $3 }
pascal@20458 841 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 842 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 843 }
pascal@20458 844 }
pascal@20458 845 if (/^ and e[abcds][ix],/) {
pascal@20458 846 split($2,args,",")
pascal@20458 847 if (args[2] == "large") { args[2] = $3 }
pascal@20459 848 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 849 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 850 }
pascal@20458 851 }
pascal@20543 852 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 853 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 854 split($0,args,",")
pascal@20542 855 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 856 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 857 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 858 print s "/256"; next
pascal@20542 859 }
pascal@20542 860 }
pascal@20546 861 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 862 split($0,args,",")
pascal@20543 863 if (args[2] == "large") { args[2] = $3 }
pascal@20458 864 if (isnum(args[2])) {
pascal@20546 865 if (args[2] % 16777216 == 0) {
pascal@20546 866 sub(/dword/,"byte",s)
pascal@20543 867 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 868 print s "/16777216"; next
pascal@20458 869 }
pascal@20458 870 if (args[2] % 65536 == 0) {
pascal@20546 871 sub(/dword/,"word",s)
pascal@20543 872 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 873 print s "/65536"; next
pascal@20458 874 }
pascal@20458 875 }
pascal@20458 876 }
pascal@20458 877 if (/^ mov e.x,/) {
pascal@20458 878 split($2,args,",")
pascal@20458 879 r=args[1]
pascal@20458 880 if (args[2] == "large") { args[2] = $3 }
pascal@20458 881 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 882 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 883 print " xor " r "," r
pascal@20458 884 if (args[2] == 0) next
pascal@20458 885 x=" mov " substr(r,2,1)
pascal@20458 886 if (args[2] % 256 == 0) {
pascal@20458 887 print x "h," args[2] "/256"
pascal@20458 888 }
pascal@20458 889 else { print x "l," args[2] }
pascal@20458 890 next
pascal@20458 891 }
pascal@20458 892 }
pascal@20458 893 }
pascal@21576 894 if (afterjmp) print ";" $0
pascal@21576 895 else print
pascal@21754 896 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@21754 897 /^ call near ptr @die$qpxzc/) afterjmp=1
pascal@20458 898 }