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1.1 ! root 1: # C library -- conversions ! 2: ! 3: .globl __doprnt ! 4: .globl __flsbuf ! 5: ! 6: #define vbit 1 ! 7: #define flags r10 ! 8: #define ndfnd 0 ! 9: #define prec 1 ! 10: #define zfill 2 ! 11: #define minsgn 3 ! 12: #define plssgn 4 ! 13: #define numsgn 5 ! 14: #define caps 6 ! 15: #define blank 7 ! 16: #define gflag 8 ! 17: #define dpflag 9 ! 18: #define width r9 ! 19: #define ndigit r8 ! 20: #define llafx r7 ! 21: #define lrafx r6 ! 22: #define fdesc -4(fp) ! 23: #define exp -8(fp) ! 24: #define sexp -12(fp) ! 25: #define nchar -16(fp) ! 26: #define sign -17(fp) ! 27: .set ch.zer,'0 # cpp doesn't like single appostrophes ! 28: ! 29: .align 2 ! 30: strtab: # translate table for detecting null and percent ! 31: .byte 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 ! 32: .byte 16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31 ! 33: .byte ' ,'!,'",'#,'$, 0,'&,'','(,'),'*,'+,',,'-,'.,'/ ! 34: .byte '0,'1,'2,'3,'4,'5,'6,'7,'8,'9,':,';,'<,'=,'>,'? ! 35: .byte '@,'A,'B,'C,'D,'E,'F,'G,'H,'I,'J,'K,'L,'M,'N,'O ! 36: .byte 'P,'Q,'R,'S,'T,'U,'V,'W,'X,'Y,'Z,'[,'\,'],'^,'_ ! 37: .byte '`,'a,'b,'c,'d,'e,'f,'g,'h,'i,'j,'k,'l,'m,'n,'o ! 38: .byte 'p,'q,'r,'s,'t,'u,'v,'w,'x,'y,'z,'{,'|,'},'~,127 ! 39: .byte 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143 ! 40: .byte 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159 ! 41: .byte 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175 ! 42: .byte 176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191 ! 43: .byte 192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207 ! 44: .byte 208,209,210,211,212,213,214,215,216,217,218,219,220,221,222,223 ! 45: .byte 224,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239 ! 46: .byte 240,241,242,243,244,245,246,247,248,249,250,251,252,253,254,255 ! 47: ! 48: strfoo: ! 49: clrl r4 # fix interrupt race ! 50: jbr strok # and try again ! 51: strmore: ! 52: movzbl (r1)+,r2 # one char ! 53: tstb (r3)[r2] # translate ! 54: jeql stresc2 # bad guy in disguise (outbuf is full) ! 55: strout2: # enter here to force out r2; r0,r1 must be set ! 56: pushr $3 # save input descriptor ! 57: pushl fdesc # FILE ! 58: pushl r2 # the char ! 59: calls $2,__flsbuf # please empty the buffer and handle 1 char ! 60: tstl r0 # successful? ! 61: jgeq strm1 # yes ! 62: jbcs $31,nchar,strm1 # turn on sign bit of nchar to signify error ! 63: strm1: ! 64: incl nchar # count the char ! 65: popr $3 # get input descriptor back ! 66: strout: # enter via bsb with (r0,r1)=input descriptor ! 67: movab strtab,r3 # table address ! 68: movq *fdesc,r4 # output descriptor ! 69: jbs $31,r4,strfoo # negative count is a no no ! 70: strok: ! 71: addl2 r0,nchar # we intend to move this many chars ! 72: movtuc r0,(r1),$0,(r3),r4,(r5) ! 73: movpsl r2 # squirrel away condition codes ! 74: movq r4,*fdesc # update output descriptor ! 75: subl2 r0,nchar # some chars not moved ! 76: jbs $vbit,r2,stresc # terminated by escape? ! 77: sobgeq r0,strmore # no; but out buffer might be full ! 78: stresc: ! 79: rsb ! 80: stresc2: ! 81: incl r0 # fix the length ! 82: decl r1 # and the addr ! 83: movl $1<vbit,r2 # fake condition codes ! 84: rsb ! 85: ! 86: errdone: ! 87: jbcs $31,nchar,prdone # set error bit ! 88: prdone: ! 89: movl nchar,r0 ! 90: ret ! 91: ! 92: .align 1 ! 93: __doprnt: ! 94: .word 0xfc0 # uses r11-r6 ! 95: movab -256(sp),sp # work space ! 96: movl 4(ap),r11 # addr of format string ! 97: movl 12(ap),fdesc # output FILE ptr ! 98: movl 8(ap),ap # addr of first arg ! 99: clrl nchar # number of chars transferred ! 100: loop: ! 101: movzwl $65535,r0 # pseudo length ! 102: movl r11,r1 # fmt addr ! 103: bsbw strout # copy to output, stop at null or percent ! 104: movl r1,r11 # new fmt ! 105: jbc $vbit,r2,loop # if no escape, then very long fmt ! 106: tstb (r11)+ # escape; null or percent? ! 107: jeql prdone # null means end of fmt ! 108: ! 109: movl sp,r5 # reset output buffer pointer ! 110: clrq r9 # width; flags ! 111: clrq r6 # lrafx,llafx ! 112: longorunsg: # we can ignore both of these distinctions ! 113: short: ! 114: L4a: ! 115: movzbl (r11)+,r0 # so capital letters can tail merge ! 116: L4: caseb r0,$' ,$'x-' # format char ! 117: L5: ! 118: .word space-L5 # space ! 119: .word fmtbad-L5 # ! ! 120: .word fmtbad-L5 # " ! 121: .word sharp-L5 # # ! 122: .word fmtbad-L5 # $ ! 123: .word fmtbad-L5 # % ! 124: .word fmtbad-L5 # & ! 125: .word fmtbad-L5 # ' ! 126: .word fmtbad-L5 # ( ! 127: .word fmtbad-L5 # ) ! 128: .word indir-L5 # * ! 129: .word plus-L5 # + ! 130: .word fmtbad-L5 # , ! 131: .word minus-L5 # - ! 132: .word dot-L5 # . ! 133: .word fmtbad-L5 # / ! 134: .word gnum0-L5 # 0 ! 135: .word gnum-L5 # 1 ! 136: .word gnum-L5 # 2 ! 137: .word gnum-L5 # 3 ! 138: .word gnum-L5 # 4 ! 139: .word gnum-L5 # 5 ! 140: .word gnum-L5 # 6 ! 141: .word gnum-L5 # 7 ! 142: .word gnum-L5 # 8 ! 143: .word gnum-L5 # 9 ! 144: .word fmtbad-L5 # : ! 145: .word fmtbad-L5 # ; ! 146: .word fmtbad-L5 # < ! 147: .word fmtbad-L5 # = ! 148: .word fmtbad-L5 # > ! 149: .word fmtbad-L5 # ? ! 150: .word fmtbad-L5 # @ ! 151: .word fmtbad-L5 # A ! 152: .word fmtbad-L5 # B ! 153: .word fmtbad-L5 # C ! 154: .word decimal-L5 # D ! 155: .word capital-L5 # E ! 156: .word fmtbad-L5 # F ! 157: .word capital-L5 # G ! 158: .word fmtbad-L5 # H ! 159: .word fmtbad-L5 # I ! 160: .word fmtbad-L5 # J ! 161: .word fmtbad-L5 # K ! 162: .word fmtbad-L5 # L ! 163: .word fmtbad-L5 # M ! 164: .word fmtbad-L5 # N ! 165: .word octal-L5 # O ! 166: .word fmtbad-L5 # P ! 167: .word fmtbad-L5 # Q ! 168: .word fmtbad-L5 # R ! 169: .word fmtbad-L5 # S ! 170: .word fmtbad-L5 # T ! 171: .word unsigned-L5 # U ! 172: .word fmtbad-L5 # V ! 173: .word fmtbad-L5 # W ! 174: .word hex-L5 # X ! 175: .word fmtbad-L5 # Y ! 176: .word fmtbad-L5 # Z ! 177: .word fmtbad-L5 # [ ! 178: .word fmtbad-L5 # \ ! 179: .word fmtbad-L5 # ] ! 180: .word fmtbad-L5 # ^ ! 181: .word fmtbad-L5 # _ ! 182: .word fmtbad-L5 # ` ! 183: .word fmtbad-L5 # a ! 184: .word fmtbad-L5 # b ! 185: .word charac-L5 # c ! 186: .word decimal-L5 # d ! 187: .word scien-L5 # e ! 188: .word float-L5 # f ! 189: .word general-L5 # g ! 190: .word short-L5 # h ! 191: .word fmtbad-L5 # i ! 192: .word fmtbad-L5 # j ! 193: .word fmtbad-L5 # k ! 194: .word longorunsg-L5 # l ! 195: .word fmtbad-L5 # m ! 196: .word fmtbad-L5 # n ! 197: .word octal-L5 # o ! 198: .word fmtbad-L5 # p ! 199: .word fmtbad-L5 # q ! 200: .word fmtbad-L5 # r ! 201: .word string-L5 # s ! 202: .word fmtbad-L5 # t ! 203: .word unsigned-L5 # u ! 204: .word fmtbad-L5 # v ! 205: .word fmtbad-L5 # w ! 206: .word hex-L5 # x ! 207: fmtbad: ! 208: movb r0,(r5)+ # print the unfound character ! 209: jeql errdone # dumb users who end the format with a % ! 210: jbr prbuf ! 211: capital: ! 212: bisl2 $1<caps,flags # note that it was capitalized ! 213: xorb2 $'a^'A,r0 # make it small ! 214: jbr L4 # and try again ! 215: ! 216: string: ! 217: movl ndigit,r0 ! 218: jbs $prec,flags,L20 # max length was specified ! 219: mnegl $1,r0 # default max length ! 220: L20: movl (ap)+,r2 # addr first byte ! 221: locc $0,r0,(r2) # find the zero at the end ! 222: movl r1,r5 # addr last byte +1 ! 223: movl r2,r1 # addr first byte ! 224: jbr prstr ! 225: ! 226: htab: .byte '0,'1,'2,'3,'4,'5,'6,'7,'8,'9,'a,'b,'c,'d,'e,'f ! 227: Htab: .byte '0,'1,'2,'3,'4,'5,'6,'7,'8,'9,'A,'B,'C,'D,'E,'F ! 228: ! 229: octal: ! 230: movl $30,r2 # init position ! 231: movl $3,r3 # field width ! 232: movab htab,llafx # translate table ! 233: jbr L10 ! 234: ! 235: hex: ! 236: movl $28,r2 # init position ! 237: movl $4,r3 # field width ! 238: movab htab,llafx # translate table ! 239: jbc $caps,flags,L10 ! 240: movab Htab,llafx ! 241: L10: mnegl r3,r6 # increment ! 242: clrl r1 ! 243: addl2 $4,r5 # room for left affix (2) and slop [forced sign?] ! 244: movl (ap)+,r0 # fetch arg ! 245: L11: extzv r2,r3,r0,r1 # pull out a digit ! 246: movb (llafx)[r1],(r5)+ # convert to character ! 247: L12: acbl $0,r6,r2,L11 # continue until done ! 248: clrq r6 # lrafx, llafx ! 249: clrb (r5) # flag end ! 250: skpc $'0,$11,4(sp) # skip over leading zeroes ! 251: jbc $numsgn,flags,prn3 # easy if no left affix ! 252: tstl -4(ap) # original value ! 253: jeql prn3 # no affix on 0, for some reason ! 254: cmpl r3,$4 # were we doing hex or octal? ! 255: jneq L12a # octal ! 256: movb $'x,r0 ! 257: jbc $caps,flags,L12b ! 258: movb $'X,r0 ! 259: L12b: movb r0,-(r1) ! 260: movl $2,llafx # leading 0x for hex is an affix ! 261: L12a: movb $'0,-(r1) # leading zero for octal is a digit, not an affix ! 262: jbr prn3 # omit sign (plus, blank) massaging ! 263: ! 264: unsigned: ! 265: lunsigned: ! 266: bicl2 $1<plssgn|1<blank,flags # omit sign (plus, blank) massaging ! 267: extzv $1,$31,(ap),r0 # right shift logical 1 bit ! 268: cvtlp r0,$10,(sp) # convert [n/2] to packed ! 269: movp $10,(sp),8(sp) # copy packed ! 270: addp4 $10,8(sp),$10,(sp) # 2*[n/2] in packed, at (sp) ! 271: blbc (ap)+,L14 # n was even ! 272: addp4 $1,pone,$10,(sp) # n was odd ! 273: jbr L14 ! 274: ! 275: patdec: # editpc pattern for decimal printing ! 276: .byte 0xAA # eo$float 10 ! 277: .byte 0x01 # eo$end_float ! 278: .byte 0 # eo$end ! 279: ! 280: decimal: ! 281: cvtlp (ap)+,$10,(sp) # 10 digits max ! 282: jgeq L14 ! 283: incl llafx # minus sign is a left affix ! 284: L14: editpc $10,(sp),patdec,8(sp) # ascii at 8(sp); r5=end+1 ! 285: skpc $' ,$11,8(sp) # skip leading blanks; r1=first ! 286: ! 287: prnum: # r1=addr first byte, r5=addr last byte +1, llafx=size of signs ! 288: # -1(r1) vacant, for forced sign ! 289: tstl llafx ! 290: jneq prn3 # already some left affix, dont fuss ! 291: jbc $plssgn,flags,prn2 ! 292: movb $'+,-(r1) # needs a plus sign ! 293: jbr prn4 ! 294: prn2: jbc $blank,flags,prn3 ! 295: movb $' ,-(r1) # needs a blank sign ! 296: prn4: incl llafx ! 297: prn3: jbs $prec,flags,prn1 ! 298: movl $1,ndigit # default precision is 1 ! 299: prn1: subl3 r1,r5,lrafx # raw width ! 300: subl2 llafx,lrafx # number of digits ! 301: subl2 lrafx,ndigit # number of leading zeroes needed ! 302: jleq prstr # none ! 303: addl2 llafx,r1 # where current digits start ! 304: pushl r1 # movcx gobbles registers ! 305: # check bounds on users who say %.300d ! 306: movab 32(r5)[ndigit],r2 ! 307: subl2 fp,r2 ! 308: jlss prn5 ! 309: subl2 r2,ndigit ! 310: prn5: ! 311: # ! 312: movc3 lrafx,(r1),(r1)[ndigit] # make room in middle ! 313: movc5 $0,(r1),$ch.zer,ndigit,*(sp) # '0 fill ! 314: subl3 llafx,(sp)+,r1 # first byte addr ! 315: addl3 lrafx,r3,r5 # last byte addr +1 ! 316: ! 317: prstr: # r1=addr first byte; r5=addr last byte +1 ! 318: # width=minimum width; llafx=len. left affix ! 319: # ndigit=<avail> ! 320: subl3 r1,r5,ndigit # raw width ! 321: subl3 ndigit,width,r0 # pad length ! 322: jleq padlno # in particular, no left padding ! 323: jbs $minsgn,flags,padlno ! 324: # extension for %0 flag causing left zero padding to field width ! 325: jbs $zfill,flags,padlz ! 326: # this bsbb needed even if %0 flag extension is removed ! 327: bsbb padb # blank pad on left ! 328: jbr padnlz ! 329: padlz: ! 330: movl llafx,r0 ! 331: jleq padnlx # left zero pad requires left affix first ! 332: subl2 r0,ndigit # part of total length will be transferred ! 333: subl2 r0,width # and will account for part of minimum width ! 334: bsbw strout # left affix ! 335: padnlx: ! 336: subl3 ndigit,width,r0 # pad length ! 337: bsbb padz # zero pad on left ! 338: padnlz: ! 339: # end of extension for left zero padding ! 340: padlno: # remaining: root, possible right padding ! 341: subl2 ndigit,width # root reduces minimum width ! 342: movl ndigit,r0 # root length ! 343: p1: bsbw strout # transfer to output buffer ! 344: p3: jbc $vbit,r2,padnpct # percent sign (or null byte via %c) ? ! 345: decl r0 # yes; adjust count ! 346: movzbl (r1)+,r2 # fetch byte ! 347: movq *fdesc,r4 # output buffer descriptor ! 348: sobgeq r4,p2 # room at the out [inn] ? ! 349: bsbw strout2 # no; force it, then try rest ! 350: jbr p3 # here we go 'round the mullberry bush, ... ! 351: p2: movb r2,(r5)+ # hand-deposit the percent or null ! 352: incl nchar # count it ! 353: movq r4,*fdesc # store output descriptor ! 354: jbr p1 # what an expensive hiccup! ! 355: padnpct: ! 356: movl width,r0 # size of pad ! 357: jleq loop ! 358: bsbb padb ! 359: jbr loop ! 360: ! 361: padz: ! 362: movb $'0,r2 ! 363: jbr pad ! 364: padb: ! 365: movb $' ,r2 ! 366: pad: ! 367: subl2 r0,width # pad width decreases minimum width ! 368: pushl r1 # save non-pad addr ! 369: movl r0,llafx # remember width of pad ! 370: subl2 r0,sp # allocate ! 371: movc5 $0,(r0),r2,llafx,(sp) # create pad string ! 372: movl llafx,r0 # length ! 373: movl sp,r1 # addr ! 374: bsbw strout ! 375: addl2 llafx,sp # deallocate ! 376: movl (sp)+,r1 # recover non-pad addr ! 377: rsb ! 378: ! 379: pone: .byte 0x1C # packed 1 ! 380: ! 381: charac: ! 382: movl (ap)+,r0 # word containing the char ! 383: movb r0,(r5)+ # one byte, that's all ! 384: ! 385: prbuf: ! 386: movl sp,r1 # addr first byte ! 387: jbr prstr ! 388: ! 389: space: bisl2 $1<blank,flags # constant width e fmt, no plus sign ! 390: jbr L4a ! 391: sharp: bisl2 $1<numsgn,flags # 'self identifying', please ! 392: jbr L4a ! 393: plus: bisl2 $1<plssgn,flags # always print sign for floats ! 394: jbr L4a ! 395: minus: bisl2 $1<minsgn,flags # left justification, please ! 396: jbr L4a ! 397: gnum0: jbs $ndfnd,flags,gnum ! 398: jbs $prec,flags,gnump # ignore when reading precision ! 399: bisl2 $1<zfill,flags # leading zero fill, please ! 400: gnum: jbs $prec,flags,gnump ! 401: moval (width)[width],width # width *= 5; ! 402: movaw -ch.zer(r0)[width],width # width = 2*witdh + r0 - '0'; ! 403: jbr gnumd ! 404: gnump: moval (ndigit)[ndigit],ndigit # ndigit *= 5; ! 405: movaw -ch.zer(r0)[ndigit],ndigit # ndigit = 2*ndigit + r0 - '0'; ! 406: gnumd: bisl2 $1<ndfnd,flags # digit seen ! 407: jbr L4a ! 408: dot: clrl ndigit # start on the precision ! 409: bisl2 $1<prec,flags ! 410: bicl2 $1<ndfnd,flags ! 411: jbr L4a ! 412: indir: ! 413: jbs $prec,flags,in1 ! 414: movl (ap)+,width # width specified by parameter ! 415: jgeq gnumd ! 416: xorl2 $1<minsgn,flags # parameterized left adjustment ! 417: mnegl width,width ! 418: jbr gnumd ! 419: in1: ! 420: movl (ap)+,ndigit # precision specified by paratmeter ! 421: jgeq gnumd ! 422: mnegl ndigit,ndigit ! 423: jbr gnumd ! 424: ! 425: float: ! 426: jbs $prec,flags,float1 ! 427: movl $6,ndigit # default # digits to right of decpt. ! 428: float1: bsbw fltcvt ! 429: addl3 exp,ndigit,r7 ! 430: movl r7,r6 # for later "underflow" checking ! 431: bgeq fxplrd ! 432: clrl r7 # poor programmer planning ! 433: fxplrd: cmpl r7,$31 # expressible in packed decimal? ! 434: bleq fnarro # yes ! 435: movl $31,r7 ! 436: fnarro: subl3 $17,r7,r0 # where to round ! 437: ashp r0,$17,(sp),$5,r7,16(sp) # do it ! 438: bvc fnovfl ! 439: # band-aid for microcode error (spurious overflow) ! 440: # clrl r0 # assume even length result ! 441: # jlbc r7,fleven # right ! 442: # movl $4,r0 # odd length result ! 443: #fleven: cmpv r0,$4,16(sp),$0 # top digit zero iff true overflow ! 444: # bneq fnovfl ! 445: # end band-aid ! 446: aobleq $0,r6,fnovfl # if "underflow" then jump ! 447: movl r7,r0 ! 448: incl exp ! 449: incl r7 ! 450: ashp r0,$1,pone,$0,r7,16(sp) ! 451: ashl $-1,r7,r0 # displ to last byte ! 452: bisb2 sign,16(sp)[r0] # insert sign ! 453: fnovfl: ! 454: movab 16(sp),r1 # packed source ! 455: movl r7,r6 # packed length ! 456: pushab prnum # goto prnum after fall-through call to fedit ! 457: ! 458: ! 459: # enter via bsb ! 460: # r1=addr of packed source ! 461: # 16(r1) used to unpack source ! 462: # 48(r1) used to construct pattern to unpack source ! 463: # 48(r1) used to hold result ! 464: # r6=length of packed source (destroyed) ! 465: # exp=# digits to left of decimal point (destroyed) ! 466: # ndigit=# digits to right of decimal point (destroyed) ! 467: # sign=1 if negative, 0 otherwise ! 468: # stack will be used for work space for pattern and unpacked source ! 469: # exits with ! 470: # r1=addr of punctuated result ! 471: # r5=addr of last byte +1 ! 472: # llafx=1 if minus sign inserted, 0 otherwise ! 473: fedit: ! 474: pushab 48(r1) # save result addr ! 475: movab 48(r1),r3 # pattern addr ! 476: movb $0x03,(r3)+ # eo$set_signif ! 477: movc5 $0,(r1),$0x91,r6,(r3) # eo$move 1 ! 478: clrb (r3) # eo$end ! 479: editpc r6,(r1),48(r1),16(r1) # unpack 'em all ! 480: subl3 r6,r5,r1 # addr unpacked source ! 481: movl (sp),r3 # punctuated output placed here ! 482: clrl llafx ! 483: jlbc sign,f1 ! 484: movb $'-,(r3)+ # negative ! 485: incl llafx ! 486: f1: movl exp,r0 ! 487: jgtr f2 ! 488: movb $'0,(r3)+ # must have digit before decimal point ! 489: jbr f3 ! 490: f2: cmpl r0,r6 # limit on packed length ! 491: jleq f4 ! 492: movl r6,r0 ! 493: f4: subl2 r0,r6 # eat some digits ! 494: subl2 r0,exp # from the exponent ! 495: movc3 r0,(r1),(r3) # (most of the) digits to left of decimal point ! 496: movl exp,r0 # need any more? ! 497: jleq f3 ! 498: movc5 $0,(r1),$'0,r0,(r3) # '0 fill ! 499: f3: movl ndigit,r0 # # digits to right of decimal point ! 500: jgtr f5 ! 501: jbs $numsgn,flags,f5 # no decimal point unless forced ! 502: jbcs $dpflag,flags,f6 # no decimal point ! 503: f5: movb $'.,(r3)+ # the decimal point ! 504: f6: mnegl exp,r0 # "leading" zeroes to right of decimal point ! 505: jleq f9 ! 506: cmpl r0,ndigit # cant exceed this many ! 507: jleq fa ! 508: movl ndigit,r0 ! 509: fa: subl2 r0,ndigit ! 510: movc5 $0,(r1),$'0,r0,(r3) ! 511: f9: movl ndigit,r0 ! 512: cmpl r0,r6 # limit on packed length ! 513: jleq f7 ! 514: movl r6,r0 ! 515: f7: subl2 r0,ndigit # eat some digits from the fraction ! 516: movc3 r0,(r1),(r3) # (most of the) digits to right of decimal point ! 517: movl ndigit,r0 # need any more? ! 518: jleq f8 ! 519: # check bounds on users who say %.300f ! 520: movab 32(r3)[r0],r2 ! 521: subl2 fp,r2 ! 522: jlss fb ! 523: subl2 r2,r0 # truncate, willy-nilly ! 524: movl r0,ndigit # and no more digits later, either ! 525: fb: ! 526: # ! 527: subl2 r0,ndigit # eat some digits from the fraction ! 528: movc5 $0,(r1),$'0,r0,(r3) # '0 fill ! 529: f8: movl r3,r5 # addr last byte +1 ! 530: popr $1<1 # [movl (sp)+,r1] addr first byte ! 531: rsb ! 532: ! 533: patexp: .byte 0x03 # eo$set_signif ! 534: .byte 0x44,'e # eo$insert 'e ! 535: .byte 0x42,'+ # eo$load_plus '+ ! 536: .byte 0x04 # eo$store_sign ! 537: .byte 0x92 # eo$move 2 ! 538: .byte 0 # eo$end ! 539: ! 540: scien: ! 541: incl ndigit ! 542: jbs $prec,flags,L23 ! 543: movl $7,ndigit ! 544: L23: bsbw fltcvt # get packed digits ! 545: movl ndigit,r7 ! 546: cmpl r7,$31 # expressible in packed decimal? ! 547: jleq snarro # yes ! 548: movl $31,r7 ! 549: snarro: subl3 $17,r7,r0 # rounding position ! 550: ashp r0,$17,(sp),$5,r7,16(sp) # shift and round ! 551: bvc snovfl ! 552: # band-aid for microcode error (spurious overflow) ! 553: # clrl r0 # assume even length result ! 554: # jlbc ndigit,sceven # right ! 555: # movl $4,r0 # odd length result ! 556: #sceven: cmpv r0,$4,16(sp),$0 # top digit zero iff true overflow ! 557: # bneq snovfl ! 558: # end band-aid ! 559: incl exp # rounding overflowed to 100... ! 560: subl3 $1,r7,r0 ! 561: ashp r0,$1,pone,$0,r7,16(sp) ! 562: ashl $-1,r7,r0 # displ to last byte ! 563: bisb2 sign,16(sp)[r0] # insert sign ! 564: snovfl: ! 565: jbs $gflag,flags,gfmt # %g format ! 566: movab 16(sp),r1 ! 567: bsbb eedit ! 568: eexp: ! 569: movl r1,r6 # save fwa from destruction by cvtlp ! 570: subl3 $1,sexp,r0 # 1P exponent ! 571: cvtlp r0,$2,(sp) # packed ! 572: editpc $2,(sp),patexp,(r5) ! 573: movl r6,r1 # fwa ! 574: jbc $caps,flags,prnum ! 575: xorb2 $'e^'E,-4(r5) ! 576: jbr prnum ! 577: ! 578: eedit: ! 579: movl r7,r6 # packed length ! 580: decl ndigit # 1 digit before decimal point ! 581: movl exp,sexp # save from destruction ! 582: movl $1,exp # and pretend ! 583: jbr fedit ! 584: ! 585: gfmt: ! 586: addl3 $3,exp,r0 # exp is 1 more than e ! 587: jlss gfmte # (e+1)+3<0, e+4<=-1, e<=-5 ! 588: subl2 $3,r0 # exp [==(e+1)] ! 589: cmpl r0,ndigit ! 590: jgtr gfmte # e+1>n, e>=n ! 591: gfmtf: ! 592: movl r7,r6 ! 593: subl2 r0,ndigit # n-e-1 ! 594: movab 16(sp),r1 ! 595: bsbw fedit ! 596: g1: jbs $numsgn,flags,g2 ! 597: jbs $dpflag,flags,g2 # dont strip if no decimal point ! 598: g3: cmpb -(r5),$'0 # strip trailing zeroes ! 599: jeql g3 ! 600: cmpb (r5),$'. # and trailing decimal point ! 601: jeql g2 ! 602: incl r5 ! 603: g2: jbc $gflag,flags,eexp ! 604: jbr prnum ! 605: gfmte: ! 606: movab 16(sp),r1 # packed source ! 607: bsbw eedit ! 608: jbsc $gflag,flags,g1 # gflag now means "use %f" [hence no exponent] ! 609: ! 610: general: ! 611: jbs $prec,flags,gn1 ! 612: movl $6,ndigit # default precision is 6 significant digits ! 613: gn1: tstl ndigit # cannot allow precision of 0 ! 614: jgtr gn2 ! 615: movl $1,ndigit # change 0 to 1, willy-nilly ! 616: gn2: jbcs $gflag,flags,L23 ! 617: jbr L23 # safety net ! 618: ! 619: # convert double-floating at (ap) to 17-digit packed at (sp), ! 620: # set 'sign' and 'exp', advance ap. ! 621: fltcvt: ! 622: clrb sign ! 623: movd (ap)+,r5 ! 624: jeql fzero ! 625: bgtr fpos ! 626: mnegd r5,r5 ! 627: incb sign ! 628: fpos: ! 629: extzv $7,$8,r5,r2 # exponent of 2 ! 630: movab -0200(r2),r2 # unbias ! 631: mull2 $59,r2 # 59/196: 3rd convergent continued frac of log10(2) ! 632: jlss eneg ! 633: movab 196(r2),r2 ! 634: eneg: ! 635: movab -98(r2),r2 ! 636: divl2 $196,r2 ! 637: bsbw expten ! 638: cmpd r0,r5 ! 639: bgtr ceil ! 640: incl r2 ! 641: ceil: movl r2,exp ! 642: mnegl r2,r2 ! 643: cmpl r2,$29 # 10^(29+9) is all we can handle ! 644: bleq getman ! 645: muld2 ten16,r5 ! 646: subl2 $16,r2 ! 647: getman: addl2 $9,r2 # -ceil(log10(x)) + 9 ! 648: bsbb expten ! 649: emodd r0,r4,r5,r0,r5 # (r0+r4)*r5; r0=int, r5=frac ! 650: fz1: cvtlp r0,$9,16(sp) # leading 9 digits ! 651: ashp $8,$9,16(sp),$0,$17,4(sp) # as top 9 of 17 ! 652: emodd ten8,$0,r5,r0,r5 ! 653: cvtlp r0,$8,16(sp) # trailing 8 digits ! 654: # if precision >= 17, must round here ! 655: movl ndigit,r7 # so figure out what precision is ! 656: pushab scien ! 657: cmpl (sp)+,(sp) ! 658: jleq gm1 # who called us? ! 659: addl2 exp,r7 # float; adjust for exponent ! 660: gm1: cmpl r7,$17 ! 661: jlss gm2 ! 662: cmpd r5,$0d0.5 # must round here; check fraction ! 663: jlss gm2 ! 664: bisb2 $0x10,8+4(sp) # increment l.s. digit ! 665: gm2: # end of "round here" code ! 666: addp4 $8,16(sp),$17,4(sp) # combine leading and trailing ! 667: bisb2 sign,12(sp) # and insert sign ! 668: rsb ! 669: fzero: clrl r0 ! 670: movl $1,exp # 0.000e+00 and 0.000 rather than 0.000e-01 and .000 ! 671: jbr fz1 ! 672: ! 673: .align 2 ! 674: lsb: .long 0x00010000 # lsb in the crazy floating-point format ! 675: ! 676: # return 10^r2 as a double float in r0||r1 and 8 extra bits of precision in r4 ! 677: # preserve r2, r5||r6 ! 678: expten: ! 679: movd $0d1.0,r0 # begin computing 10^exp10 ! 680: clrl r4 # bit counter ! 681: movad ten1,r3 # table address ! 682: tstl r2 ! 683: bgeq e10lp ! 684: mnegl r2,r2 # get absolute value ! 685: jbss $6,r2,e10lp # flag as negative ! 686: e10lp: jbc r4,r2,el1 # want this power? ! 687: muld2 (r3),r0 # yes ! 688: el1: addl2 $8,r3 # advance to next power ! 689: aobleq $5,r4,e10lp # through 10^32 ! 690: jbcc $6,r2,el2 # correct for negative exponent ! 691: divd3 r0,$0d1.0,r0 # by taking reciprocal ! 692: cmpl $28,r2 ! 693: jneq enm28 ! 694: addl2 lsb,r1 # 10**-28 needs lsb incremented ! 695: enm28: mnegl r2,r2 # original exponent of 10 ! 696: el2: addl3 $5*8,r2,r3 # negative bit positions are illegal? ! 697: jbc r3,xlsbh-5,eoklsb ! 698: subl2 lsb,r1 # lsb was too high ! 699: eoklsb: ! 700: movzbl xprec[r2],r4 # 8 extra bits ! 701: rsb ! 702: ! 703: # powers of ten ! 704: .align 2 ! 705: ten1: .word 0x4220,0,0,0 ! 706: ten2: .word 0x43c8,0,0,0 ! 707: ten4: .word 0x471c,0x4000,0,0 ! 708: ten8: .word 0x4dbe,0xbc20,0,0 ! 709: ten16: .word 0x5b0e,0x1bc9,0xbf04,0 ! 710: ten32: .word 0x759d,0xc5ad,0xa82b,0x70b6 ! 711: ! 712: # whether lsb is too high or not ! 713: .byte 1:0,1:0,1:0,1:0,1:1,1:0,1:1,1:0 # -40 thru -33 ! 714: .byte 1:0,1:1,1:0,1:0,1:0,1:0,1:1,1:0 # -32 thru -25 ! 715: .byte 1:0,1:0,1:1,1:1,1:1,1:1,1:0,1:0 # -24 thru -17 ! 716: .byte 1:0,1:1,1:0,1:0,1:1,1:1,1:1,1:1 # -16 thru -9 ! 717: .byte 1:1,1:1,1:1,1:0,1:0,1:0,1:0,1:1 # -8 thru -1 ! 718: xlsbh: ! 719: .byte 1:0,1:0,1:0,1:0,1:0,1:0,1:0,1:0 # 0 thru 7 ! 720: .byte 1:0,1:0,1:0,1:0,1:0,1:0,1:0,1:0 # 8 thru 15 ! 721: .byte 1:0,1:0,1:0,1:0,1:0,1:0,1:0,1:0 # 16 thru 23 ! 722: .byte 1:0,1:1,1:1,1:0,1:1,1:1,1:1,1:1 # 24 thru 31 ! 723: .byte 1:1,1:1,1:1,1:1,1:1,1:1,1:1 # 32 thru 38 ! 724: ! 725: # bytes of extra precision ! 726: .byte 0x56,0x76,0xd3,0x88,0xb5,0x62 # -38 thru -33 ! 727: .byte 0xba,0xf5,0x32,0x3e,0x0e,0x48,0xdb,0x51 # -32 thru -25 ! 728: .byte 0x53,0x27,0xb1,0xef,0xeb,0xa5,0x07,0x49 # -24 thru -17 ! 729: .byte 0x5b,0xd9,0x0f,0x13,0xcd,0xff,0xbf,0x97 # -16 thru -9 ! 730: .byte 0xfd,0xbc,0xb6,0x23,0x2c,0x3b,0x0a,0xcd # -8 thru -1 ! 731: xprec: ! 732: .byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 # 0 thru 7 ! 733: .byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 # 8 thru 15 ! 734: .byte 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 # 16 thru 23 ! 735: .byte 0x00,0xa0,0xc8,0x3a,0x84,0xe4,0xdc,0x92 # 24 thru 31 ! 736: .byte 0x9b,0x00,0xc0,0x58,0xae,0x18,0xef # 32 thru 38
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