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1.1 ! root 1: /* ! 2: * Copyright (c) 1980 Regents of the University of California. ! 3: * All rights reserved. The Berkeley Software License Agreement ! 4: * specifies the terms and conditions for redistribution. ! 5: */ ! 6: ! 7: #ifndef lint ! 8: .ascii "@(#)doprnt.c 5.2 (Berkeley) 6/6/85" ! 9: #endif ! 10: ! 11: # C library -- conversions ! 12: ! 13: .globl __doprnt ! 14: .globl __strout ! 15: ! 16: #define flags r10 ! 17: #define literb 0 ! 18: #define liter 1 ! 19: #define ndfndb 0 ! 20: #define ndfnd 1 ! 21: #define ljustb 1 ! 22: #define ljust 2 ! 23: #define zfillb 2 ! 24: #define zfill 4 ! 25: #define precb 3 ! 26: #define prec 8 ! 27: #define psignb 4 ! 28: #define psign 16 ! 29: #define gflagb 5 ! 30: #define gflag 32 ! 31: #define width r9 ! 32: #define ndigit r8 ! 33: #define fdesc -4(fp) ! 34: #define exp -8(fp) ! 35: #define sign -9(fp) ! 36: .set one,010 # 1.0 in floating immediate ! 37: .set ch.zer,'0 # cpp doesn't like single appostrophes ! 38: ! 39: .align 1 ! 40: __doprnt: ! 41: .word 0xfc0 # uses r11-r6 ! 42: subl2 $128,sp ! 43: movl 4(ap),r11 # addr of format string ! 44: movl 12(ap),fdesc # output FILE ptr ! 45: movl 8(ap),ap # addr of first arg ! 46: loop: ! 47: movl r11,r0 # current point in format ! 48: bicl2 $liter,flags # no literal characters yet ! 49: L1: movb (r11)+,width # next character of format ! 50: beql L2 # end of format string ! 51: cmpb width,$'% ! 52: beql L2 # warning character ! 53: bisl2 $liter,flags # literal character ! 54: jbr L1 ! 55: L2: blbc flags,L3 # bbc $literb,flags,L3 # no literals in format ! 56: pushl fdesc # file pointer ! 57: pushl $0 # no left/right adjust ! 58: pushl r0 # addr ! 59: subl3 r0,r11,r1 # length ! 60: subl3 $1,r1,-(sp) # % or null not part of literal ! 61: calls $4,__strout # dump the literal ! 62: L3: ! 63: blbs width,L4 # % is odd; end of format? ! 64: ret # yes ! 65: ! 66: # htab overlaps last 16 characters of ftab ! 67: ftab: .byte 0, 0, 0,'c,'d,'e,'f,'g, 0, 0, 0,'+,'l,'-,'.,'o ! 68: htab: .byte '0,'1,'2,'3,'4,'5,'6,'7,'8,'9,'a,'b,'c,'d,'e,'f ! 69: ! 70: L4: movl sp,r5 # reset output buffer pointer ! 71: clrq r9 # width; flags ljustb,ndfndb,zfillb ! 72: L4a: movzbl (r11)+,r0 # supposed format ! 73: extzv $0,$5,r0,r1 # bottom 5 bits ! 74: L4b: cmpb r0,ftab[r1] # good enough? ! 75: jneq L6 # no ! 76: L4c: casel r1,$3,$22 # yes ! 77: L5: .word charac-L5 # c ! 78: .word decimal-L5 # d ! 79: .word scien-L5 # e ! 80: .word float-L5 # f ! 81: .word general-L5 # g ! 82: .word L6-L5 # h ! 83: .word L6-L5 # i ! 84: .word L6-L5 # j ! 85: .word plus-L5 # + ! 86: .word longorunsg-L5 # l ! 87: .word minus-L5 # - ! 88: .word dot-L5 # . ! 89: .word octal-L5 # o ! 90: .word gnum0-L5 # 0 ! 91: .word gnum-L5 # 1 ! 92: .word gnum-L5 # 2 ! 93: .word gnum-L5 # 3 ! 94: .word gnum-L5 # 4 ! 95: .word gnum-L5 # 5 ! 96: .word gnum-L5 # 6 ! 97: .word gnum-L5 # 7 ! 98: .word gnum-L5 # 8 ! 99: .word gnum-L5 # 9 ! 100: ! 101: L6: jbcs $5,r0,L4b # capitals same as small ! 102: cmpb r0,$'s ! 103: jeql string ! 104: cmpb r0,$'x ! 105: jeql hex ! 106: cmpb r0,$'u ! 107: jeql unsigned ! 108: cmpb r0,$'r ! 109: jeql remote ! 110: movzbl -1(r11),r0 # orginal "format" character ! 111: cmpb r0,$'* ! 112: jeql indir ! 113: L9: movb r0,(r5)+ # print the unfound character ! 114: jbr prbuf ! 115: ! 116: nulstr: ! 117: .byte '(,'n,'u,'l,'l,'),0 ! 118: ! 119: string: ! 120: movl ndigit,r0 ! 121: jbs $precb,flags,L20 # max length was specified ! 122: mnegl $1,r0 # default max length ! 123: L20: movl (ap)+,r2 # addr first byte ! 124: bneq L21 ! 125: movab nulstr,r2 ! 126: L21: locc $0,r0,(r2) # find the zero at the end ! 127: movl r1,r5 # addr last byte +1 ! 128: movl r2,r1 # addr first byte ! 129: jbr prstr ! 130: ! 131: ! 132: longorunsg: ! 133: movb (r11)+,r0 ! 134: cmpb r0,$'o ! 135: jeql loct ! 136: cmpb r0,$'x ! 137: jeql lhex ! 138: cmpb r0,$'d ! 139: jeql long ! 140: cmpb r0,$'u ! 141: jeql lunsigned ! 142: decl r11 ! 143: jbr unsigned ! 144: ! 145: loct: ! 146: octal: ! 147: movl $30,r2 # init position ! 148: movl $3,r3 # field width ! 149: movl $10,r4 # result length -1 ! 150: jbr L10 ! 151: ! 152: lhex: ! 153: hex: ! 154: movl $28,r2 # init position ! 155: movl $4,r3 # field width ! 156: movl $7,r4 # result length -1 ! 157: L10: mnegl r3,r6 # increment ! 158: clrl r1 ! 159: movl (ap)+,r0 # fetch arg ! 160: L11: extzv r2,r3,r0,r1 # pull out a digit ! 161: movb htab[r1],(r5)+ # convert to character ! 162: L12: acbl $0,r6,r2,L11 # continue until done ! 163: clrb (r5) # flag end ! 164: skpc $'0,r4,(sp) # skip over leading zeroes ! 165: jbr prstr ! 166: ! 167: patdec: # editpc pattern for decimal printing ! 168: .byte 0xA9 # eo$float 9 ! 169: .byte 0x01 # eo$end_float ! 170: .byte 0x91 # eo$move 1 ! 171: .byte 0 # eo$end ! 172: ! 173: long: ! 174: decimal: ! 175: cvtlp (ap)+,$10,(sp) # 10 digits max ! 176: L14: editpc $10,(sp),patdec,8(sp) # ascii at 8(sp); r5=end+1 ! 177: skpc $' ,$10,8(sp) # skip leading blanks; r1=first ! 178: ! 179: prstr: # r1=addr first byte; r5=addr last byte +1 ! 180: cvtbl $' ,-(sp) # blank fill ! 181: jbc $zfillb,flags,L15 ! 182: cvtbl $'0,(sp) # zero fill ! 183: L15: pushl fdesc # FILE ! 184: subl2 r1,r5 # r5=actual length=end+1-first ! 185: subl3 r5,width,r0 # if >0, how much to fill ! 186: bgeq L24 ! 187: clrl r0 # no fill ! 188: L24: jbs $ljustb,flags,L25 ! 189: mnegl r0,r0 ! 190: L25: pushl r0 # fill count ! 191: pushl r1 # addr first byte ! 192: pushl r5 # length ! 193: calls $5,__strout ! 194: jbr loop ! 195: ! 196: pone: .byte 0x1C # packed 1 ! 197: ! 198: unsigned: ! 199: lunsigned: ! 200: extzv $1,$31,(ap),r0 # right shift logical 1 bit ! 201: cvtlp r0,$10,(sp) # convert [n/2] to packed ! 202: movp $10,(sp),8(sp) # copy packed ! 203: addp4 $10,8(sp),$10,(sp) # 2*[n/2] in packed, at (sp) ! 204: blbc (ap)+,L14 # n was even ! 205: addp4 $1,pone,$10,(sp) # n was odd ! 206: jbr L14 ! 207: ! 208: charac: ! 209: movl $4,r0 # chars per word ! 210: L18: movb (ap)+,(r5)+ # transfer char ! 211: bneq L19 ! 212: decl r5 # omit null characters ! 213: L19: sobgtr r0,L18 ! 214: ! 215: prbuf: ! 216: movl sp,r1 # addr first byte ! 217: jbr prstr ! 218: ! 219: plus: bisl2 $psign,flags # always print sign for floats ! 220: jbr L4a ! 221: minus: bisl2 $ljust,flags # left justification, please ! 222: jbr L4a ! 223: gnum0: jbs $ndfndb,flags,gnum ! 224: jbs $precb,flags,gnump # ignore when reading precision ! 225: bisl2 $zfill,flags # leading zero fill, please ! 226: gnum: jbs $precb,flags,gnump ! 227: moval (width)[width],width # width *= 5; ! 228: movaw -ch.zer(r0)[width],width # width = 2*witdh + r0 - '0'; ! 229: jbr gnumd ! 230: gnump: moval (ndigit)[ndigit],ndigit # ndigit *= 5; ! 231: movaw -ch.zer(r0)[ndigit],ndigit # ndigit = 2*ndigit + r0 - '0'; ! 232: gnumd: bisl2 $ndfnd,flags # digit seen ! 233: jbr L4a ! 234: dot: clrl ndigit # start on the precision ! 235: bisl2 $prec,flags ! 236: bicl2 $ndfnd,flags ! 237: jbr L4a ! 238: indir: movl (ap)+,ndigit # width specified by parameter ! 239: jbr gnumd ! 240: remote: movl (ap)+,ap ! 241: movl (ap)+,r11 ! 242: jbr loop ! 243: ! 244: float: ! 245: bsbw fltcvt ! 246: fltg: jbs $ndfndb,flags,float1 ! 247: movl $6,ndigit # default # digits to right of decpt. ! 248: float1: addl3 exp,ndigit,r7 ! 249: movl r7,r6 # for later "underflow" checking ! 250: bgeq fxplrd ! 251: clrl r7 # poor programmer planning ! 252: fxplrd: cmpl r7,$31 # expressible in packed decimal? ! 253: bleq fnarro # yes ! 254: movl $31,r7 ! 255: fnarro: subl3 $17,r7,r0 # where to round ! 256: ashp r0,$17,(sp),$5,r7,16(sp) # do it ! 257: bvc fnovfl ! 258: # band-aid for microcode error (spurious overflow) ! 259: clrl r0 # assume even length result ! 260: jlbc r7,fleven # right ! 261: movl $4,r0 # odd length result ! 262: fleven: cmpv r0,$4,16(sp),$0 # top digit zero iff true overflow ! 263: bneq fnovfl ! 264: # end band-aid ! 265: aobleq $0,r6,fnovfl # if "underflow" then jump ! 266: movl r7,r0 ! 267: incl exp ! 268: incl r7 ! 269: ashp r0,$1,pone,$0,r7,16(sp) ! 270: ashl $-1,r7,r0 # displ to last byte ! 271: bisb2 sign,16(sp)[r0] # insert sign ! 272: fnovfl: ! 273: movc3 $4,patsci,(sp) ! 274: clrl r6 # # digits moved so far ! 275: movl exp,r0 ! 276: bleq fexpng ! 277: bsbb patmov # digits to left of decpt. ! 278: fexpng: tstl ndigit ! 279: jeql fnodp ! 280: movc3 $2,fpatdp,(r3) ! 281: tstl exp ! 282: bgeq fxppos ! 283: addl3 exp,ndigit,r6 ! 284: bgeq flfakl ! 285: clrl r6 # it's all fill ! 286: flfakl: subl3 r6,$31,r6 # fake length for patmov ! 287: flfill: movc3 $2,fpatzf,(r3) # zero fill to right of dec.pt ! 288: fxppos: movl ndigit,r0 ! 289: bsbb patmov ! 290: fnodp: sobgeq r6,fledit # must move at least 1 digit ! 291: movl $31,r6 # none moved; fake it ! 292: aobleq $1,ndigit,flfill # with a one-character zero fill ! 293: fledit: editpc r7,16(sp),(sp),32(sp) ! 294: jbr prflt ! 295: ! 296: patexp: .byte 0x03 # eo$set_signif ! 297: .byte 0x44,'e # eo$insert 'e ! 298: .byte 0x42,'+ # eo$load_plus '+ ! 299: .byte 0x04 # eo$store_sign ! 300: .byte 0x92 # eo$move 2 ! 301: .byte 0 # eo$end ! 302: patsci: .byte 0x42,'+ # eo$load_plus '+ ! 303: .byte 0x03 # eo$set_signif ! 304: .byte 0x04 # eo$store_sign ! 305: .byte 0x91 # eo$move 1 ! 306: fpatdp: .byte 0x44,'. # eo$insert '. ! 307: fpatzf: .byte 0x40,'0 # eo$load_fill '0 ! 308: ! 309: # construct pattern at (r3) to move r0 digits in editpc; ! 310: # r6 digits already moved for this number ! 311: patmov: ! 312: movb $0x90,r2 # eo$move ! 313: subl3 r6,$31,r1 # # digits remaining in packed ! 314: addl2 r0,r6 ! 315: cmpl r0,r1 # enough digits remaining? ! 316: bleq patsml # yes ! 317: tstl exp # zero 'fill'; before or after rest? ! 318: bgeq pataft # after ! 319: pushl r1 # # digits remaining ! 320: movb $0x80,r2 # eo$fill ! 321: subl3 $31,r6,r0 # number of fill bytes ! 322: bsbb patsml # recursion! ! 323: movl (sp)+,r0 ! 324: movb $0x90,r2 # eo$move ! 325: jbr patsml ! 326: pataft: movl r1,r0 # last of the 31 ! 327: bsbb patsml # recursion! ! 328: subl3 $31,r6,r0 # number of fill bytes ! 329: movb $0x80,r2 # eo$fill ! 330: patsml: tstl r0 ! 331: bleq patzer # DEC doesn't like repetition counts of 0 ! 332: mnegl $15,r1 # 15 digits at a time ! 333: subl2 r1,r0 # counteract acbl ! 334: jbr pattst ! 335: patmlp: bisb3 r2,$15,(r3)+ # 15 ! 336: pattst: acbl $16,r1,r0,patmlp # until <= 15 left ! 337: bisb3 r2,r0,(r3)+ # rest ! 338: patzer: clrb (r3) # eo$end ! 339: rsb ! 340: ! 341: scien: ! 342: bsbw fltcvt # get packed digits ! 343: scig: incl ndigit ! 344: jbs $ndfndb,flags,L23 ! 345: movl $7,ndigit ! 346: L23: subl3 $17,ndigit,r0 # rounding position ! 347: ashp r0,$17,(sp),$5,ndigit,16(sp) # shift and round ! 348: bvc snovfl ! 349: # band-aid for microcode error (spurious overflow) ! 350: clrl r0 # assume even length result ! 351: jlbc ndigit,sceven # right ! 352: movl $4,r0 # odd length result ! 353: sceven: cmpv r0,$4,16(sp),$0 # top digit zero iff true overflow ! 354: bneq snovfl ! 355: # end band-aid ! 356: incl exp # rounding overflowed to 100... ! 357: subl3 $1,ndigit,r0 ! 358: ashp r0,$1,pone,$0,ndigit,16(sp) ! 359: ashl $-1,ndigit,r0 # displ to last byte ! 360: bisb2 sign,16(sp)[r0] # insert sign ! 361: snovfl: ! 362: jbc $gflagb,flags,enotg # not %g format ! 363: # find trailing zeroes in packed number ! 364: ashl $-1,ndigit,r0 ! 365: addl2 r3,r0 # addr of l.s.digit and sign ! 366: movl $4,r1 # bit position of digit ! 367: movl ndigit,r7 # current length of packed ! 368: jbr gtz ! 369: gtz1: xorl2 $4,r1 # position of next digit ! 370: bneq gtz # same byte ! 371: decl r0 # different byte ! 372: gtz: cmpv r1,$4,(r0),$0 # a trailing zero? ! 373: jneq gntz ! 374: sobgtr r7,gtz1 ! 375: incl r7 ! 376: gntz: # r7: minimum width of fraction ! 377: cmpl exp,$-4 ! 378: jleq eg # small exponents use %e ! 379: subl3 r7,exp,r0 ! 380: cmpl $5,r0 ! 381: jleq eg # so do (w+5) <= exp ! 382: tstl r0 # rest use %f ! 383: jleq fg # did we trim too many trailing zeroes? ! 384: movl exp,r7 # yes ! 385: fg: subl3 ndigit,r7,r0 ! 386: ashp r0,ndigit,16(sp),$0,r7,(sp) ! 387: movp r7,(sp),16(sp) ! 388: subl3 exp,r7,ndigit # correct ndigit for %f ! 389: jbr fnovfl ! 390: eg: subl3 ndigit,r7,r0 ! 391: ashp r0,ndigit,16(sp),$0,r7,(sp) ! 392: movp r7,(sp),16(sp) ! 393: movl r7,ndigit # packed number has been trimmed ! 394: enotg: ! 395: movc3 $7,patsci,(sp) ! 396: movl $1,r6 # 1P ! 397: subl3 $1,ndigit,r0 # digits after dec.pt ! 398: bsbw patmov ! 399: editpc ndigit,16(sp),(sp),32(sp) # 32(sp)->result, r5->(end+1) ! 400: decl exp # compensate: 1 digit left of dec.pt ! 401: cvtlp exp,$2,(sp) # exponent ! 402: editpc $2,(sp),patexp,(r5) ! 403: prflt: movab 32(sp),r1 ! 404: jbs $psignb,flags,prflt1 ! 405: cmpb (r1)+,$'+ ! 406: beql prflt1 ! 407: decl r1 ! 408: prflt1: skpc $' ,$63,(r1) ! 409: jbr prstr ! 410: ! 411: general: ! 412: jbcs $gflagb,flags,scien ! 413: jbr scien # safety net ! 414: ! 415: # convert double-floating at (ap) to 17-digit packed at (sp), ! 416: # set 'sign' and 'exp', advance ap. ! 417: fltcvt: ! 418: clrb sign ! 419: movd (ap)+,r5 ! 420: jeql fzero ! 421: bgtr fpos ! 422: mnegd r5,r5 ! 423: incb sign ! 424: fpos: ! 425: extzv $7,$8,r5,r2 # exponent of 2 ! 426: movaw -0600(r2)[r2],r2 # unbias and mult by 3 ! 427: bgeq epos ! 428: subl2 $9,r2 ! 429: epos: divl2 $10,r2 ! 430: bsbb expten ! 431: cmpd r0,r5 ! 432: bgtr ceil ! 433: incl r2 ! 434: ceil: movl r2,exp ! 435: mnegl r2,r2 ! 436: cmpl r2,$29 # 10^(29+9) is all we can handle ! 437: bleq getman ! 438: muld2 ten16,r5 ! 439: subl2 $16,r2 ! 440: getman: addl2 $9,r2 # -ceil(log10(x)) + 9 ! 441: bsbb expten ! 442: emodd r0,r4,r5,r0,r5 # (r0+r4)*r5; r0=int, r5=frac ! 443: fz1: cvtlp r0,$9,16(sp) # leading 9 digits ! 444: ashp $8,$9,16(sp),$0,$17,4(sp) # as top 9 of 17 ! 445: emodd ten8,$0,r5,r0,r5 ! 446: cvtlp r0,$8,16(sp) # trailing 8 digits ! 447: addp4 $8,16(sp),$17,4(sp) # combine leading and trailing ! 448: bisb2 sign,12(sp) # and insert sign ! 449: rsb ! 450: fzero: clrl r0 ! 451: movl $1,exp # 0.000e+00 and 0.000 rather than 0.000e-01 and .000 ! 452: jbr fz1 ! 453: ! 454: # return 10^r2 as a double float in r0||r1 and 8 extra bits of precision in r4 ! 455: # preserve r2, r5||r6 ! 456: expten: ! 457: movd $one,r0 # begin computing 10^exp10 ! 458: clrl r4 # bit counter ! 459: movad ten1,r3 # table address ! 460: tstl r2 ! 461: bgeq e10lp ! 462: mnegl r2,r2 # get absolute value ! 463: jbss $6,r2,e10lp # flag as negative ! 464: e10lp: jbc r4,r2,el1 # want this power? ! 465: muld2 (r3),r0 # yes ! 466: el1: addl2 $8,r3 # advance to next power ! 467: aobleq $5,r4,e10lp # through 10^32 ! 468: jbcc $6,r2,el2 # correct for negative exponent ! 469: divd3 r0,$one,r0 # by taking reciprocal ! 470: mnegl r2,r2 ! 471: el2: clrl r4 # 8 extra bits of precision ! 472: rsb ! 473: ! 474: # powers of ten ! 475: .align 2 ! 476: ten1: .word 0x4220,0,0,0 ! 477: ten2: .word 0x43c8,0,0,0 ! 478: ten4: .word 0x471c,0x4000,0,0 ! 479: ten8: .word 0x4dbe,0xbc20,0,0 ! 480: ten16: .word 0x5b0e,0x1bc9,0xbf04,0 ! 481: ten32: .word 0x759d,0xc5ad,0xa82b,0x70b6
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