ref: 8994e194bd85d231021e1e60ef12a957b48d205f
dir: /Engine/src/fixedPoint_math.h/
/* * "Build Engine & Tools" Copyright (c) 1993-1997 Ken Silverman * Ken Silverman's official web site: "http://www.advsys.net/ken" * See the included license file "BUILDLIC.TXT" for license info. * This file has been modified from Ken Silverman's original release */ #ifndef __PRAGMAS_H__ #define __PRAGMAS_H__ #include "platform.h" static __inline void swapchar(uint8_t *p1, uint8_t *p2) { uint8_t tmp = *p1; *p1 = *p2; *p2 = tmp; } static __inline void swapshort(short *p1, short *p2) { short tmp = *p1; *p1 = *p2; *p2 = tmp; } static __inline void swaplong(int32_t *p1, int32_t *p2) { int32_t tmp = *p1; *p1 = *p2; *p2 = tmp; } static __inline void swapchar2(uint8_t *p1, uint8_t *p2, int xsiz) { swapchar(p1, p2); swapchar(p1 + 1, p2 + xsiz); } static __inline int32_t msqrtasm(uint32_t input) { uint32_t a,b; a = 0x40000000l; // mov eax, 0x40000000 b = 0x20000000l; // mov ebx, 0x20000000 do { // begit: if (input >= a) { // cmp ecx, eax / jl skip input -= a; // sub ecx, eax a += b*4; // lea eax, [eax+ebx*4] } // skip: a -= b; // sub eax, ebx a >>= 1; // shr eax, 1 b >>= 2; // shr ebx, 2 } while (b); // jnz begit if (input >= a) // cmp ecx, eax a++; // sbb eax, -1 a >>= 1; // shr eax, 1 return a; } void vlin16first (int32_t i1, int32_t i2); static inline int32_t sqr (int32_t input1) { return input1*input1; } /* internal use:32x32 = 64bit */ static inline int64_t mul32_64(int32_t i1,int32_t i2) { return (int64_t)i1*i2; } static inline int scale (int32_t input1, int32_t input2, int32_t input3) { return (int)(mul32_64(input1,input2)/(int64_t)input3); } static inline int mulscale (int32_t input1, int32_t input2, int32_t input3) { return (int)(mul32_64(input1,input2)>>input3); } static inline int dmulscale (int32_t input1, int32_t input2, int32_t input3,int32_t input4,int32_t input5) { return (int)((mul32_64(input1,input2) + mul32_64(input3,input4))>>input5); } 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) { return (int)((mul32_64(i1,i2) + mul32_64(i3,i4) + mul32_64(i5,i6))>>shift); } static inline int32_t divscale(int32_t i1, int32_t i2, int32_t i3) { return (int32_t)(((int64_t)i1<<i3)/i2); } #define DEFFUNCS \ DEFFUN(1)\ DEFFUN(2)\ DEFFUN(3)\ DEFFUN(4)\ DEFFUN(5)\ DEFFUN(6)\ DEFFUN(7)\ DEFFUN(8)\ DEFFUN(9)\ DEFFUN(10)\ DEFFUN(11)\ DEFFUN(12)\ DEFFUN(13)\ DEFFUN(14)\ DEFFUN(15)\ DEFFUN(16)\ DEFFUN(17)\ DEFFUN(18)\ DEFFUN(19)\ DEFFUN(20)\ DEFFUN(21)\ DEFFUN(22)\ DEFFUN(23)\ DEFFUN(24)\ DEFFUN(25)\ DEFFUN(26)\ DEFFUN(27)\ DEFFUN(28)\ DEFFUN(29)\ DEFFUN(30)\ DEFFUN(31)\ DEFFUN(32) #define DEFFUN(N) \ static __inline int32_t mulscale##N(int32_t input1, int32_t input2) \ { return mulscale(input1,input2,N); } DEFFUNCS #undef DEFFUN #define DEFFUN(N) \ static __inline int32_t dmulscale##N(int32_t input1, int32_t input2,int32_t input3,int32_t input4) \ { return dmulscale(input1,input2,input3,input4,N); } DEFFUNCS #undef DEFFUN #define DEFFUN(N) \ static __inline int32_t tmulscale##N(int32_t i1, int32_t i2,int32_t i3,int32_t i4,int32_t i5,int32_t i6) \ { return tmulscale(i1,i2,i3,i4,i5,i6,N); } DEFFUNCS #undef DEFFUN #define DEFFUN(N) \ static __inline int32_t divscale##N(int32_t input1, int32_t input2) \ { return divscale(input1,input2,N); } DEFFUNCS #undef DEFFUN static inline int ksgn(int32_t i1) { if (i1 < 0) return -1; else if (i1 > 0) return 1; else return 0; } static inline int sgn(int32_t i1) { return ksgn(i1); } static inline int klabs (int32_t i1) { if (i1 < 0) i1 = -i1; return i1; } static inline int mul3 (int32_t i1) { return i1*3; } static inline int mul5 (int32_t i1) { return i1*5; } static inline int mul9 (int32_t i1) { return i1*9; } void copybufreverse(void *S, void *D, int32_t c); void copybuf(void *s, void *d, int32_t c); void clearbuf(void *d, int32_t c, int32_t a); void clearbufbyte(void *D, int32_t c, int32_t a); void copybufbyte(void *S, void *D, int32_t c); void qinterpolatedown16 (int32_t* bufptr, int32_t num, int32_t val, int32_t add); void qinterpolatedown16short (int32_t* bufptr, int32_t num, int32_t val, int32_t add); #endif /* !defined _INCLUDE_PRAGMAS_H_ */