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Port of Duke Nukem 3D
This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL for Rockbox. Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9
This commit is contained in:
Franklin Wei
parent
01c6dcf6c7
commit
a855d62025
994 changed files with 336924 additions and 15 deletions
167
apps/plugins/sdl/progs/duke3d/Engine/src/fixedPoint_math.h
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167
apps/plugins/sdl/progs/duke3d/Engine/src/fixedPoint_math.h
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/*
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* "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman
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* Ken Silverman's official web site: "http://www.advsys.net/ken"
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* See the included license file "BUILDLIC.TXT" for license info.
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* This file has been modified from Ken Silverman's original release
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*/
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#ifndef __PRAGMAS_H__
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#define __PRAGMAS_H__
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#include "platform.h"
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static __inline void swapchar(uint8_t *p1, uint8_t *p2)
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{ uint8_t tmp = *p1; *p1 = *p2; *p2 = tmp; }
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static __inline void swapshort(short *p1, short *p2)
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{ short tmp = *p1; *p1 = *p2; *p2 = tmp; }
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static __inline void swaplong(int32_t *p1, int32_t *p2)
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{ int32_t tmp = *p1; *p1 = *p2; *p2 = tmp; }
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static __inline void swapchar2(uint8_t *p1, uint8_t *p2, int xsiz)
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{
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swapchar(p1, p2);
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swapchar(p1 + 1, p2 + xsiz);
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}
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static __inline int32_t msqrtasm(uint32_t input)
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{
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uint32_t a,b;
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a = 0x40000000l; // mov eax, 0x40000000
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b = 0x20000000l; // mov ebx, 0x20000000
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do { // begit:
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if (input >= a) { // cmp ecx, eax / jl skip
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input -= a; // sub ecx, eax
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a += b*4; // lea eax, [eax+ebx*4]
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} // skip:
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a -= b; // sub eax, ebx
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a >>= 1; // shr eax, 1
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b >>= 2; // shr ebx, 2
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}
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while (b); // jnz begit
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if (input >= a) // cmp ecx, eax
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a++; // sbb eax, -1
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a >>= 1; // shr eax, 1
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return a;
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}
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void vlin16first (int32_t i1, int32_t i2);
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static inline int32_t sqr (int32_t input1) { return input1*input1; }
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/* internal use:32x32 = 64bit */
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static inline int64_t mul32_64(int32_t i1,int32_t i2)
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{
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return (int64_t)i1*i2;
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}
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static inline int scale (int32_t input1, int32_t input2, int32_t input3)
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{
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return (int)(mul32_64(input1,input2)/(int64_t)input3);
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}
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static inline int mulscale (int32_t input1, int32_t input2, int32_t input3)
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{
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return (int)(mul32_64(input1,input2)>>input3);
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}
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static inline int dmulscale (int32_t input1, int32_t input2, int32_t input3,int32_t input4,int32_t input5)
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{
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return (int)((mul32_64(input1,input2) + mul32_64(input3,input4))>>input5);
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}
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static inline int tmulscale(int32_t i1, int32_t i2, int32_t i3, int32_t i4, int32_t i5, int32_t i6,int32_t shift)
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{
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return (int)((mul32_64(i1,i2) + mul32_64(i3,i4) + mul32_64(i5,i6))>>shift);
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}
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static inline int32_t divscale(int32_t i1, int32_t i2, int32_t i3)
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{
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return (int32_t)(((int64_t)i1<<i3)/i2);
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}
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#define DEFFUNCS \
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DEFFUN(1)\
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DEFFUN(2)\
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DEFFUN(3)\
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DEFFUN(4)\
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DEFFUN(5)\
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DEFFUN(6)\
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DEFFUN(7)\
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DEFFUN(8)\
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DEFFUN(9)\
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DEFFUN(10)\
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DEFFUN(11)\
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DEFFUN(12)\
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DEFFUN(13)\
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DEFFUN(14)\
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DEFFUN(15)\
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DEFFUN(16)\
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DEFFUN(17)\
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DEFFUN(18)\
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DEFFUN(19)\
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DEFFUN(20)\
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DEFFUN(21)\
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DEFFUN(22)\
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DEFFUN(23)\
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DEFFUN(24)\
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DEFFUN(25)\
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DEFFUN(26)\
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DEFFUN(27)\
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DEFFUN(28)\
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DEFFUN(29)\
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DEFFUN(30)\
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DEFFUN(31)\
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DEFFUN(32)
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#define DEFFUN(N) \
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static __inline int32_t mulscale##N(int32_t input1, int32_t input2) \
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{ return mulscale(input1,input2,N); }
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DEFFUNCS
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#undef DEFFUN
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#define DEFFUN(N) \
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static __inline int32_t dmulscale##N(int32_t input1, int32_t input2,int32_t input3,int32_t input4) \
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{ return dmulscale(input1,input2,input3,input4,N); }
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DEFFUNCS
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#undef DEFFUN
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#define DEFFUN(N) \
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static __inline int32_t tmulscale##N(int32_t i1, int32_t i2,int32_t i3,int32_t i4,int32_t i5,int32_t i6) \
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{ return tmulscale(i1,i2,i3,i4,i5,i6,N); }
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DEFFUNCS
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#undef DEFFUN
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#define DEFFUN(N) \
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static __inline int32_t divscale##N(int32_t input1, int32_t input2) \
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{ return divscale(input1,input2,N); }
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DEFFUNCS
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#undef DEFFUN
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static inline int ksgn(int32_t i1)
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{
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if (i1 < 0) return -1;
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else if (i1 > 0) return 1;
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else return 0;
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}
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static inline int sgn(int32_t i1) { return ksgn(i1); }
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static inline int klabs (int32_t i1)
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{
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if (i1 < 0) i1 = -i1;
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return i1;
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}
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static inline int mul3 (int32_t i1) { return i1*3; }
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static inline int mul5 (int32_t i1) { return i1*5; }
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static inline int mul9 (int32_t i1) { return i1*9; }
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void copybufreverse(void *S, void *D, int32_t c);
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void copybuf(void *s, void *d, int32_t c);
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void clearbuf(void *d, int32_t c, int32_t a);
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void clearbufbyte(void *D, int32_t c, int32_t a);
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void copybufbyte(void *S, void *D, int32_t c);
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void qinterpolatedown16 (int32_t* bufptr, int32_t num, int32_t val, int32_t add);
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void qinterpolatedown16short (int32_t* bufptr, int32_t num, int32_t val, int32_t add);
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#endif /* !defined _INCLUDE_PRAGMAS_H_ */
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