mirror of https://github.com/nmlgc/ReC98.git
532 lines
8.6 KiB
NASM
532 lines
8.6 KiB
NASM
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; enum flagBits
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isSuppressed = 1
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isHalf = 2
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isLong = 4
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isLongDouble = 8
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isExclusive = 10h
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isFarPtr = 20h
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; int __cdecl _scantod(int *(__cdecl __near near *Get)(), int (__cdecl __near near *UnGet)(), const void *srceP, int width, int *countP, int *statusP)
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__scantod proc near
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@@localeDot = byte ptr -19h
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@@frac = tbyte ptr -18h
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@@status = word ptr -0Eh
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@@ct = word ptr -0Ch
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@@ExpOflow = byte ptr -9
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@@expSign = byte ptr -8
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@@saw_sign = byte ptr -7
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@@FirstDigit = byte ptr -6
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@@sign = byte ptr -5
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@@digits = word ptr -4
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@@decimals = word ptr -2
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@@Get = word ptr 4
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@@UnGet = word ptr 6
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@@srceP = DPTR_ 8
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@@width = word ptr (8 + dPtrSize)
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@@countP = DPTR_ (8 + dPtrSize + 2)
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@@statusP = DPTR_ (8 + dPtrSize + 2 + dPtrSize)
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push bp
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mov bp, sp
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sub sp, 1Ah
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push si
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push di
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mov [bp+@@sign], 0
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mov [bp+@@FirstDigit], 1
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mov [bp+@@saw_sign], 0
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mov [bp+@@expSign], 0
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mov [bp+@@ExpOflow], 0
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mov [bp+@@ct], 0
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mov [bp+@@status], 1
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fldz
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fstp [bp+@@frac]
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fwait
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les bx, __localeconvention
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mov al, es:[bx]
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mov [bp+@@localeDot], al
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mov si, 8000h
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mov di, -2
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std_nextBlank:
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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call [bp+@@Get]
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popCX_
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pop cx
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or ax, ax
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jge short not_instantEOF
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jmp std_EOF
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not_instantEOF:
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cbw
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xchg ax, bx
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test bl, 80h
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jnz short std_notSpace
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ifdef __HUGE__
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mov ax, seg __ctype
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mov es, ax
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test es:(__ctype+1)[bx], _IS_SP
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else
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test (__ctype+1)[bx], _IS_SP
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endif
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jnz short std_nextBlank
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std_notSpace:
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xchg ax, bx
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dec [bp+@@width]
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jl short std_fractionLimited
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cmp al, '+'
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jz short std_signSeen
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cmp al, '-'
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jnz short std_fracChar
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inc [bp+@@sign]
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std_signSeen:
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inc [bp+@@saw_sign]
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std_fracLoop:
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dec [bp+@@width]
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jl short std_fractionLimited
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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call [bp+@@Get]
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popCX_
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pop cx
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cmp [bp+@@FirstDigit], 1
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jnz short std_fracChar
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cmp [bp+@@saw_sign], 0
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jz short std_fracChar
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cmp al, 'I'
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jz short relPossibleINF
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cmp al, 'N'
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jz short relPossibleNAN
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jmp short std_fracChar
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relPossibleINF:
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jmp PossibleINF
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relPossibleNAN:
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jmp PossibleNAN
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std_fracChar:
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mov [bp+@@FirstDigit], 0
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cmp al, [bp+@@localeDot]
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jz short std_fracPoint
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cmp al, '9'
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ja short std_fracEndJmp
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cmp al, '0'
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jb short std_fracEndJmp
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sub al, '0'
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cbw
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inc di
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jg short std_notFirst
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mov byte ptr [bp+@@frac], al
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mov di, 1
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or al, al
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jnz short std_fracLoop
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neg di
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cmp si, 8000h
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jz short std_fracLoop
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dec si
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jmp short std_fracLoop
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std_fractionLimited:
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mov al, 'e'
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jmp_to_fracEnd:
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jmp std_fracEnd
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std_EOF:
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mov [bp+@@status], EOF
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jmp short std_noResult
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std_fracEndJmp:
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jmp std_fracEnd
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std_fracPoint:
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cmp si, 8000h
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jnz short jmp_to_fracEnd
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sub si, si
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or di, di
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jle short std_fracLoop
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mov si, di
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jmp short std_fracLoop
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std_notFirst:
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cmp di, 5
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ja short std_beyond5
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xchg ax, bx
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mov ax, 10
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mul word ptr [bp+@@frac]
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add ax, bx
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adc dl, dh
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mov word ptr [bp+@@frac], ax
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mov word ptr [bp+@@frac+2], dx
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jmp std_fracLoop
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std_beyond5:
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cmp di, 18
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ja short jmp_frac_loop
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xchg ax, bx
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mov ax, 10
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mul word ptr [bp+@@frac+6]
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mov word ptr [bp+@@frac+6], ax
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mov ax, 10
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mul word ptr [bp+@@frac+4]
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mov word ptr [bp+@@frac+4], ax
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push dx
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mov ax, 10
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mul word ptr [bp+@@frac+2]
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mov word ptr [bp+@@frac+2], ax
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push dx
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mov ax, 10
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mul word ptr [bp+@@frac]
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add ax, bx
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mov word ptr [bp+@@frac], ax
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adc word ptr [bp+@@frac+2], dx
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pop dx
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adc word ptr [bp+@@frac+4], dx
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pop dx
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adc word ptr [bp+@@frac+6], dx
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jmp_frac_loop:
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jmp std_fracLoop
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std_noDigitSeen:
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mov [bp+@@status], 0
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std_noResult:
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cmp [bp+@@width], 0
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jl short std_fldz
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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push ax
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call [bp+@@UnGet]
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add sp, 2 + dPtrSize
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dec [bp+@@ct]
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std_fldz:
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fldz
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jmp std_end
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std_fracEnd:
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cmp di, -2
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jz short std_noDigitSeen
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cmp si, 8000h
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jnz short std_exponent
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mov si, di
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std_exponent:
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mov [bp+@@digits], di
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mov [bp+@@decimals], si
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sub di, di
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cmp al, 'E'
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jz short std_present
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cmp al, 'e'
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jnz short std_combine
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std_present:
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dec [bp+@@width]
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jl short std_exponentLimited
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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call [bp+@@Get]
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popCX_
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pop cx
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cmp al, '+'
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jz short std_expNext
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cmp al, '-'
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jnz short std_expGotNext
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inc [bp+@@expSign]
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std_expNext:
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dec [bp+@@width]
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jl short std_exponentLimited
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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call [bp+@@Get]
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popCX_
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pop cx
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std_expGotNext:
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cmp al, '9'
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ja short std_combine
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sub al, '0'
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jb short std_expNonDigit
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cbw
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xchg ax, di
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mov dx, 10
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mul dx
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add di, ax
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cmp di, 4932
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jle short std_expNext
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xor di, di
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mov [bp+@@ExpOflow], 1
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jmp short std_expNext
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std_expNonDigit:
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add al, '0'
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std_combine:
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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push ax
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call [bp+@@UnGet]
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add sp, 2 + dPtrSize
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dec [bp+@@ct]
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std_exponentLimited:
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test [bp+@@expSign], 0FFh
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jz short skip_neg
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neg di
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neg [bp+@@ExpOflow]
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skip_neg:
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mov bx, [bp+@@digits]
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or bx, bx
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jge short std_nonZero
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fldz
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jmp short std_end
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std_nonZero:
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mov cx, [bp+@@decimals]
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mov ax, cx
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add ax, di
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cmp [bp+@@ExpOflow], 1
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jz short std_isInfinite
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cmp [bp+@@ExpOflow], -1
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jnz short std_isNormal
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fldz
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jmp short status2
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std_isInfinite:
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mov ax, -1
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mov word ptr [bp+@@frac], ax
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mov word ptr [bp+@@frac+2], ax
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mov word ptr [bp+@@frac+4], ax
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mov word ptr [bp+@@frac+6], ax
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mov word ptr [bp+@@frac+8], 7FFEh
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fld [bp+@@frac]
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status2:
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mov [bp+@@status], 2
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jmp short std_end
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std_isNormal:
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mov ax, bx
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cmp bx, 18
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jbe short std_usualPoint
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mov bx, 18
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std_usualPoint:
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add ax, cx
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sub cx, bx
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add di, cx
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fild qword ptr [bp+@@frac]
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mov ax, di
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or ax, ax
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jz short std_end
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jge short std_pow
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neg ax
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std_pow:
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push ax
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nopcall _pow10
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pop ax
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or di, di
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jge short std_expPlus
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fdivp st(1), st
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jmp short std_end
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std_expPlus:
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fmulp st(1), st
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std_end:
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cmp [bp+@@sign], 0
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jz short std_exit
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fchs
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std_exit:
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LES_ di, [bp+@@countP]
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mov bx, [bp+@@ct]
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add ES_[di], bx
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LES_ di, [bp+@@statusP]
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mov bx, [bp+@@status]
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mov ES_[di], bx
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jmp @@end
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PossibleINF:
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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call [bp+@@Get]
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popCX_
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pop cx
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dec [bp+@@width]
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jl short Didnt_pan_out
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cmp al, 'N'
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jnz short Didnt_pan_out
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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call [bp+@@Get]
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popCX_
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pop cx
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dec [bp+@@width]
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jl short Didnt_pan_out
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cmp al, 'F'
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jnz short Didnt_pan_out
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cmp [bp+@@sign], 0
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jz short positive_INF
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fld INFM
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jmp short std_exit
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positive_INF:
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fld INF
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jmp short std_exit
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PossibleNAN:
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inc [bp+@@ct]
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if LDATA
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push word ptr [bp+@@srceP+2]
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endif
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push word ptr [bp+@@srceP]
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|
|
call [bp+@@Get]
|
||
|
|
popCX_
|
||
|
|
pop cx
|
||
|
|
dec [bp+@@width]
|
||
|
|
jl short Didnt_pan_out
|
||
|
|
cmp al, 'A'
|
||
|
|
jnz short Didnt_pan_out
|
||
|
|
inc [bp+@@ct]
|
||
|
|
if LDATA
|
||
|
|
push word ptr [bp+@@srceP+2]
|
||
|
|
endif
|
||
|
|
push word ptr [bp+@@srceP]
|
||
|
|
call [bp+@@Get]
|
||
|
|
popCX_
|
||
|
|
pop cx
|
||
|
|
dec [bp+@@width]
|
||
|
|
jl short Didnt_pan_out
|
||
|
|
cmp al, 'N'
|
||
|
|
jnz short Didnt_pan_out
|
||
|
|
cmp [bp+@@sign], 0
|
||
|
|
jz short positive_NAN
|
||
|
|
fld NANM
|
||
|
|
jmp std_exit
|
||
|
|
|
||
|
|
positive_NAN:
|
||
|
|
fld NAN
|
||
|
|
jmp std_exit
|
||
|
|
|
||
|
|
Didnt_pan_out:
|
||
|
|
mov [bp+@@status], 0
|
||
|
|
jmp std_noDigitSeen
|
||
|
|
|
||
|
|
@@end:
|
||
|
|
pop di
|
||
|
|
pop si
|
||
|
|
mov sp, bp
|
||
|
|
pop bp
|
||
|
|
ret
|
||
|
|
__scantod endp
|
||
|
|
|
||
|
|
|
||
|
|
; void __cdecl __near _scanpop()
|
||
|
|
__scanpop proc near
|
||
|
|
push bp
|
||
|
|
mov bp, sp
|
||
|
|
fstp st
|
||
|
|
pop bp
|
||
|
|
ret
|
||
|
|
__scanpop endp
|
||
|
|
|
||
|
|
|
||
|
|
; void __cdecl __near _scanrslt(void *rsltP, int rsltType)
|
||
|
|
__scanrslt proc near
|
||
|
|
@@tempQuad = qword ptr -20h
|
||
|
|
@@tempLong = tbyte ptr -18h
|
||
|
|
@@temp = tbyte ptr -0Ah
|
||
|
|
@@rsltP = DPTR_ (4)
|
||
|
|
@@rsltType = word ptr (4 + dPtrSize)
|
||
|
|
|
||
|
|
push bp
|
||
|
|
mov bp, sp
|
||
|
|
sub sp, 0Ah
|
||
|
|
push si
|
||
|
|
mov si, [bp+@@rsltType]
|
||
|
|
fstp [bp+@@temp]
|
||
|
|
test si, isLong
|
||
|
|
jz short @@longDouble?
|
||
|
|
mov ax, 1
|
||
|
|
push ax
|
||
|
|
fld [bp+@@temp]
|
||
|
|
sub sp, 0Ah
|
||
|
|
fstp [bp+@@tempLong]
|
||
|
|
fld qword ptr _huge_dble
|
||
|
|
sub sp, 8
|
||
|
|
fstp [bp+@@tempQuad]
|
||
|
|
fwait
|
||
|
|
call __ldtrunc
|
||
|
|
LES_ bx, [bp+@@rsltP]
|
||
|
|
fstp qword ptr ES_[bx]
|
||
|
|
jmp short @@ret
|
||
|
|
|
||
|
|
@@longDouble?:
|
||
|
|
test si, isLongDouble
|
||
|
|
jz short @@single
|
||
|
|
LES_ bx, [bp+@@rsltP]
|
||
|
|
fld [bp+@@temp]
|
||
|
|
fstp tbyte ptr ES_[bx]
|
||
|
|
jmp short @@ret
|
||
|
|
|
||
|
|
@@single:
|
||
|
|
xor ax, ax
|
||
|
|
push ax
|
||
|
|
fld [bp+@@temp]
|
||
|
|
sub sp, 0Ah
|
||
|
|
fstp [bp+@@tempLong]
|
||
|
|
fld qword ptr INF_QUAD
|
||
|
|
sub sp, 8
|
||
|
|
fstp [bp+@@tempQuad]
|
||
|
|
fwait
|
||
|
|
call __ldtrunc
|
||
|
|
LES_ bx, [bp+@@rsltP]
|
||
|
|
fstp dword ptr ES_[bx]
|
||
|
|
|
||
|
|
@@ret:
|
||
|
|
fwait
|
||
|
|
pop si
|
||
|
|
mov sp, bp
|
||
|
|
pop bp
|
||
|
|
ret
|
||
|
|
__scanrslt endp
|
||
|
|
|
||
|
|
|
||
|
|
_turboFloat proc
|
||
|
|
push bp
|
||
|
|
mov bp, sp
|
||
|
|
pop bp
|
||
|
|
ret
|
||
|
|
_turboFloat endp
|