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Diffstat (limited to 'nGenEx/Fix.h')
-rw-r--r-- | nGenEx/Fix.h | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/nGenEx/Fix.h b/nGenEx/Fix.h deleted file mode 100644 index d3aade0..0000000 --- a/nGenEx/Fix.h +++ /dev/null @@ -1,204 +0,0 @@ -/* Starshatter OpenSource Distribution - Copyright (c) 1997-2004, Destroyer Studios LLC. - All Rights Reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright notice, - this list of conditions and the following disclaimer in the documentation - and/or other materials provided with the distribution. - * Neither the name "Destroyer Studios" nor the names of its contributors - may be used to endorse or promote products derived from this software - without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - POSSIBILITY OF SUCH DAMAGE. - - SUBSYSTEM: nGenEx.lib - FILE: Fix.h - AUTHOR: John DiCamillo - - - OVERVIEW - ======== - Fixed point number class with 16 bits of fractional precision -*/ - -#ifndef Fix_h -#define Fix_h - -// +--------------------------------------------------------------------+ - -#include "Types.h" - -// +--------------------------------------------------------------------+ - -const double fix_sixty_five=65536.0; - -inline int fast_f2i(double d) -{ - int i; - - _asm { - fld d - fistp i - } - - return i; -} - -// +--------------------------------------------------------------------+ - -class fix -{ -public: - static const char* TYPENAME() { return "fix"; } - - enum FixDef { Precision=16, IntMask=0xffff0000, FractMask=0x0000ffff }; - static const fix one; - static const fix two; - static const fix three; - static const fix five; - static const fix ten; - - fix() { } - fix(int n) : val(n<<Precision) { } - fix(double d) - { - long ival; - _asm { - fld fix_sixty_five - fmul d - fistp ival - } - val=ival; - } - fix(const fix& f) : val(f.val) { } - - // conversion operators: - operator int () const { return (val>>Precision); } - operator float () const { return ((float) val) / ((float) fix_sixty_five); } - operator double() const { return ((double) val) / fix_sixty_five; } - - // assignment operators: - fix& operator=(const fix& f) { val=f.val; return *this; } - fix& operator=(int n) { val=(n<<Precision); return *this; } - fix& operator=(double d) { long ival; - _asm { fld fix_sixty_five - fmul d - fistp ival } - val = ival; - return *this; } - - // comparison operators: - int operator==(const fix& f) const { return val==f.val; } - int operator!=(const fix& f) const { return val!=f.val; } - int operator<=(const fix& f) const { return val<=f.val; } - int operator>=(const fix& f) const { return val>=f.val; } - int operator< (const fix& f) const { return val< f.val; } - int operator> (const fix& f) const { return val> f.val; } - - // arithmetic operators: - fix operator+(const fix& f) const { fix r; r.val = val+f.val; return r; } - fix operator-(const fix& f) const { fix r; r.val = val-f.val; return r; } - fix operator*(const fix& f) const { long a=val; long b=f.val; - _asm { - mov eax, a - mov edx, b - imul edx - shrd eax, edx, 16 - mov a, eax - } - fix r; r.val = a; return r; } - fix operator/(const fix& f) const { long a=val; long b=f.val; - _asm { - mov eax, a - mov ebx, b - mov edx, eax - sar edx, 16 - shl eax, 16 - idiv ebx - mov a, eax - } - fix r; r.val = a; return r; } - fix& operator+=(const fix& f) { val+=f.val; return *this; } - fix& operator-=(const fix& f) { val-=f.val; return *this; } - fix& operator*=(const fix& f) { long a=val; long b=f.val; - _asm { - mov eax, a - mov edx, b - imul edx - shrd eax, edx, 16 - mov a, eax - } - val=a; return *this; } - fix& operator/=(const fix& f) { long a=val; long b=f.val; - _asm { - mov eax, a - mov ebx, b - mov edx, eax - sar edx, 16 - shl eax, 16 - idiv ebx - mov a, eax - } - val=a; return *this; } - - fix operator+(int n) const { fix r; r.val = val+(n<<Precision); return r; } - fix operator-(int n) const { fix r; r.val = val-(n<<Precision); return r; } - fix operator*(int n) const { fix r; r.val = val*n; return r; } - fix operator/(int n) const { fix r; r.val = val/n; return r; } - fix& operator+=(int n) { val+=(n<<Precision); return *this; } - fix& operator-=(int n) { val-=(n<<Precision); return *this; } - fix& operator*=(int n) { val*=n; return *this; } - fix& operator/=(int n) { val/=n; return *this; } - - fix operator+(double d) const { fix f(d); return (*this)+f; } - fix operator-(double d) const { fix f(d); return (*this)-f; } - fix operator*(double d) const { fix f(d); return (*this)*f; } - fix operator/(double d) const { fix f(d); return (*this)/f; } - fix& operator+=(double d) { fix f(d); val+=f.val; return *this; } - fix& operator-=(double d) { fix f(d); val-=f.val; return *this; } - fix& operator*=(double d) { int n; _asm { fld d - fistp n } val*=n; return *this; } - fix& operator/=(double d) { int n; _asm { fld d - fistp n } val/=n; return *this; } - - // misc. functions: - fix truncate() const { fix r; r.val = val&IntMask; return r; } - fix fraction() const { fix r; r.val = val-truncate().val; return r; } - fix floor() const { fix r; r.val = val&IntMask; return r; } - fix ceil() const { fix r; r.val = (val+FractMask)&IntMask; return r; } - fix adjust_up() const { fix r; r.val = val+FractMask; return r; } - fix adjust_down() const { fix r; r.val = val-FractMask; return r; } - - fix muldiv(const fix& num, const fix& den) const - { long a=val, b=num.val, c=den.val; - _asm { - mov eax, a - mov edx, b - mov ebx, c - imul edx - idiv ebx - mov a, eax - } - fix r; r.val = a; return r; } - - // data: - long val; -}; - -#endif Fix_h - |