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26 #include "dcn_calc_math.h"
28 float dcn_bw_mod(const float arg1, const float arg2)
34 return arg1 - arg1 * ((int) (arg1 / arg2));
37 float dcn_bw_min2(const float arg1, const float arg2)
43 return arg1 < arg2 ? arg1 : arg2;
46 unsigned int dcn_bw_max(const unsigned int arg1, const unsigned int arg2)
52 return arg1 > arg2 ? arg1 : arg2;
54 float dcn_bw_max2(const float arg1, const float arg2)
60 return arg1 > arg2 ? arg1 : arg2;
63 float dcn_bw_floor2(const float arg, const float significance)
65 if (significance == 0)
67 return ((int) (arg / significance)) * significance;
70 float dcn_bw_ceil2(const float arg, const float significance)
72 float flr = dcn_bw_floor2(arg, significance);
73 if (significance == 0)
75 return flr + 0.00001 >= arg ? arg : flr + significance;
78 float dcn_bw_max3(float v1, float v2, float v3)
80 return v3 > dcn_bw_max2(v1, v2) ? v3 : dcn_bw_max2(v1, v2);
83 float dcn_bw_max5(float v1, float v2, float v3, float v4, float v5)
85 return dcn_bw_max3(v1, v2, v3) > dcn_bw_max2(v4, v5) ? dcn_bw_max3(v1, v2, v3) : dcn_bw_max2(v4, v5);
88 float dcn_bw_pow(float a, float exp)
91 /*ASSERT(exp == (int)exp);*/
94 temp = dcn_bw_pow(a, (int)(exp / 2));
95 if (((int)exp % 2) == 0) {
99 return a * temp * temp;
101 return (temp * temp) / a;
105 float dcn_bw_log(float a, float b)
107 int * const exp_ptr = (int *)(&a);
109 const int log_2 = ((x >> 23) & 255) - 128;
114 a = ((-1.0f / 3) * a + 2) * a - 2.0f / 3;
116 if (b > 2.00001 || b < 1.99999)
117 return (a + log_2) / dcn_bw_log(b, 2);