ref: 23da30843473d7ec2a0c8d26c007a2de8606134b
dir: /Engine/src/fixedPoint_math.c/
// converted from asm to c by Jonof #include <stdio.h> #include "platform.h" #include "fixedPoint_math.h" void clearbuf(void *d, int32_t c, int32_t a) { int32_t *p = (int32_t*)d; while ((c--) > 0) *(p++) = a; } void clearbufbyte(void *D, int32_t c, int32_t a) { // Cringe City uint8_t *p = (uint8_t *)D; int32_t m[4] = { 0xffl,0xff00l,0xff0000l,0xff000000l }; int32_t n[4] = { 0,8,16,24 }; int32_t z=0; while ((c--) > 0) { *(p++) = (uint8_t )((a & m[z])>>n[z]); z=(z+1)&3; } } void copybuf(void *s, void *d, int32_t c) { int32_t *p = (int32_t*)s, *q = (int32_t*)d; while ((c--) > 0) *(q++) = *(p++); } void copybufbyte(void *S, void *D, int32_t c) { uint8_t *p = (uint8_t *)S, *q = (uint8_t *)D; while((c--) > 0) *(q++) = *(p++); } void copybufreverse(void *S, void *D, int32_t c) { uint8_t *p = (uint8_t *)S, *q = (uint8_t *)D; while((c--) > 0) *(q++) = *(p--); } void qinterpolatedown16(int32_t* bufptr, int32_t num, int32_t val, int32_t add) { // gee, I wonder who could have provided this... int32_t i, *lptr = bufptr; for(i=0;i<num;i++) { lptr[i] = (val>>16); val += add; } } void qinterpolatedown16short(int32_t* bufptr, int32_t num, int32_t val, int32_t add) { // ...maybe the same person who provided this too? int32_t i; short *sptr = (short *)bufptr; for(i=0;i<num;i++) { sptr[i] = (short)(val>>16); val += add; } }