kolibrios/programs/develop/libraries/utils/trunk/_ftoa.inc

;-----------------------------------------------------------------------------+
; <EFBFBD>㭪<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ॢ<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⢥<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫠ <EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD>      [ by ManHunter / PCL ]   |
;-----------------------------------------------------------------------------|
; <EFBFBD><EFBFBD>ࠬ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>:                                                                  |
;   lpFloat - 㪠<EFBFBD><EFBFBD>⥫<EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⢥<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ TBYTE                           |
;   lpResult - 㪠<EFBFBD><EFBFBD>⥫<EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD>-<EFBFBD>ਥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> १<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>                        |
;-----------------------------------------------------------------------------+

proc    FloatToString lpFloat:DWORD, lpResult:DWORD
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>६<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        local   digits_count:DWORD
        local   old_cw:WORD
        local   new_cw:WORD
        local   saved_float:TBYTE
        local   tmp1 rb 11h
        local   tmp2 rb 11h
 
        ; <EFBFBD><EFBFBD><EFBFBD>࠭<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> ॣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        pusha
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⥫<EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD>-<EFBFBD>ਥ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     edi,[lpResult]
 
        ; <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
        mov     esi,[lpFloat]
        cmp     dword [esi],0
        jne     loc_not_zero
        cmp     dword [esi+4],0
        jne     loc_not_zero
        cmp     word [esi+8],0
        jne     loc_not_zero
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     al,'0'
        stosb
        jmp     loc_ret
 
loc_not_zero:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>஢<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>६<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        push    edi
        mov     esi,[lpFloat]
        lea     edi,[saved_float]
        movsd
        movsd
        movsw
        pop     edi
        ; <EFBFBD><EFBFBD>᫮ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⥫쭮<EFBFBD>?
        cmp     dword [saved_float+6],0
        jge     loc_not_signed
        ; <EFBFBD>ਢ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD> <EFBFBD><EFBFBD>᮫<EFBFBD>⭮<EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>祭<EFBFBD><EFBFBD>
        and     byte [saved_float+9],7Fh
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     al,'-'
        stosb
 
loc_not_signed:
        ; <EFBFBD>஢<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>稥 <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⢮ <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD>
        fclex
        ; <EFBFBD><EFBFBD><EFBFBD>࠭<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ࠢ<EFBFBD><EFBFBD><EFBFBD>饥 ᫮<EFBFBD><EFBFBD>
        fstcw   [old_cw]
        ; <EFBFBD><EFBFBD>⠭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ࠢ<EFBFBD><EFBFBD><EFBFBD>饥 ᫮<EFBFBD><EFBFBD>
        mov     [new_cw],0000001001111111b
        fldcw   [new_cw]
        lea     esi,[saved_float]
        fld     tbyte [esi]
        fld     st
        ; <EFBFBD>뤥<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD>冷<EFBFBD>
        fxtract
        fstp    st
        fldlg2
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⢮ <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD>᫥
        fmulp   st1,st
        fistp   [digits_count]
        ; <EFBFBD>᫨ <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 16, <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD>⮡ࠦ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>
        ; <EFBFBD><EFBFBD>ଠ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ᮩ <EFBFBD> <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD>⮩
        cmp     [digits_count],10h
        jnb     loc_not_integer
        ; <EFBFBD> <EFBFBD><EFBFBD>᫠ <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
        fld     st
        frndint
        fcomp   st1
        fstsw   ax
        test    ah,01000000b
        ; <EFBFBD><EFBFBD>, <EFBFBD>⮡ࠦ<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD> <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        jz      loc_not_integer
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD><EFBFBD><EFBFBD> <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        lea     eax,[tmp1]
        fbstp   [eax]
 
        ; <EFBFBD><EFBFBD>ॢ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> BCD-<EFBFBD><EFBFBD>᫮ <EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD>
        push    edi
        lea     esi,[tmp1+8]
        lea     edi,[tmp2]
        mov     ecx, 9
@@:
        std
        xor     eax,eax
        lodsb
        cld
        rol     ax,12
        rol     ah,4
        add     ax,'00'
        stosw
        loop    @b
        pop     edi
 
        ; <EFBFBD>ய<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>騩 <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     eax,11h
        mov     ecx,[digits_count]
        sub     eax,ecx
        inc     ecx
        lea     esi,[tmp2+eax]
        cmp     byte [esi],'0'
        jne     @f
        inc     esi
        dec     ecx
@@:
        ; <EFBFBD><EFBFBD>७<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD>祭<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD><EFBFBD> <EFBFBD>६<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        rep     movsb
        jmp     loc_clear_stack
 
loc_not_integer:
        mov     eax,10h
        sub     eax,[digits_count]
 
        ; <EFBFBD>८<EFBFBD>ࠧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD> 楫<EFBFBD><EFBFBD> <EFBFBD><EFBFBD> 16 ࠧ<EFBFBD>冷<EFBFBD>
        mov     ecx,eax
        cmp     eax,0
        jge     @f
        neg     eax
@@:
        ; <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ᥫ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0 <EFBFBD><EFBFBD><EFBFBD>४<EFBFBD><EFBFBD>஢<EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>㣫<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD>஭<EFBFBD> 0
        mov     [new_cw],0000101001111111b
        cmp     ecx,0
        jge     @f
        mov     [new_cw],0000011001111111b
@@:
        ; <EFBFBD><EFBFBD>⠭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ࠢ<EFBFBD><EFBFBD><EFBFBD>饥 ᫮<EFBFBD><EFBFBD>
        fldcw   [new_cw]
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 10 <EFBFBD> <EFBFBD>⥯<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>⢠ <EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        fld     [float2]
        fld     [float2]
@@:
        fmul    st,st1
        dec     eax
        cmp     eax,1
        ja      @b
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>⥪
        fxch    st1
        fstp    st
 
        ; <EFBFBD>᫨ <EFBFBD><EFBFBD>᫮ <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 0, <EFBFBD><EFBFBD> 㬭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>, <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> ࠧ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        cmp     ecx,0
        jge     @f
        fdivp   st1,st
        jmp     loc_rounded
@@:
        fmulp   st1,st
 
loc_rounded:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD>祭<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>祭<EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1.0e16 ?
        fcom    [float1]
        fstsw   ax
        test    ah,1
        jz      @f
        fmul    [float2]
        dec     [digits_count]
@@:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫮ <EFBFBD><EFBFBD><EFBFBD> <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        lea     eax,[tmp1]
        fbstp   [eax]
 
        ; <EFBFBD><EFBFBD>ॢ<EFBFBD><EFBFBD><EFBFBD><EFBFBD> BCD-<EFBFBD><EFBFBD>᫮ <EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD>
        push    edi
        lea     esi,[tmp1+8]
        lea     edi,[tmp2]
        mov     ecx, 9
@@:
        std
        xor     eax,eax
        lodsb
        cld
        rol     ax,12
        rol     ah,4
        add     ax,'00'
        stosw
        loop    @b
        pop     edi
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>ॡ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>?
        lea     esi,[tmp2+1]
        mov     ecx,[digits_count]
        cmp     ecx,-0Fh
        jl      loc_mantiss_and_exponent
        cmp     ecx,10h
        jg      loc_mantiss_and_exponent
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>᫠
        inc     ecx
        cmp     ecx,0
        jg      @f
        mov     ax,'0.'
        stosw
        neg     ecx
        mov     al,'0'
        rep     stosb
        mov     ecx,10h
        jmp     loc_fraction_filled
@@:
        rep     movsb
        mov     al,'.'
        stosb
        mov     ecx,10h
        sub     ecx,[digits_count]
 
loc_fraction_filled:
        rep     movsb
        jmp     @f
 
loc_clear_fraction:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>騥 <EFBFBD>㫨 <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        dec     edi
@@:
        cmp     byte [edi-1],'0'
        jz      loc_clear_fraction
        cmp     byte [edi-1],'.'
        jnz     @f
        dec     edi
@@:
        jmp     loc_clear_stack
 
loc_mantiss_and_exponent:
        ; <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        movsb
        mov     al,'.'
        stosb
        movsd
        movsd
        movsw
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>騥 <EFBFBD>㫨 <EFBFBD>஡<EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
@@:
        cmp     byte [edi-1],'0'
        jne     @f
        cmp     byte [edi-2],'.'
        je      @f
        dec     edi
        jmp     @b
@@:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     al,'e'
        stosb
        mov     al,'+'
        mov     ebx,[digits_count]
        cmp     ebx, 0
        jge     @f
        mov     al,'-'
        neg     ebx
@@:
        stosb
 
        ; <EFBFBD><EFBFBD><EFBFBD>祭<EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     eax,ebx
        mov     ecx,10
        mov     ebx,4
@@:
        dec     ebx
        xor     edx,edx
        div     ecx
        add     dl,'0'
        mov     [tmp1+ebx],dl
        or      ebx,ebx
        jnz     @b
 
        ; <EFBFBD>ய<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>騥 <EFBFBD>㫨 <EFBFBD><EFBFBD>ᯮ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        mov     ecx,4
        lea     esi,[tmp1]
@@:
        lodsb
        cmp     al,'0'
        jne     @f
        dec     ecx
        jmp     @b
@@:
        dec     esi
        rep     movsb
 
loc_clear_stack:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD>⠭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ࠢ<EFBFBD><EFBFBD><EFBFBD>饥 ᫮<EFBFBD><EFBFBD>
        fldcw   [old_cw]
loc_ret:
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD>砭<EFBFBD><EFBFBD> <EFBFBD><EFBFBD>ப<EFBFBD>
        mov     al,0
        stosb
 
        ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD>⠭<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> ॣ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
        popa
        ret
 
float1  dq      1.0e16
float2  dq      10.0
 
endp