Mercurial > mm7

comparison mm7_2.cpp @ 295:640a176c030f

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sub_42ECB5
author Nomad
date Tue, 19 Feb 2013 13:29:02 +0200
parents 1f0af5cac2dd
children af7e848d6def
comparison
equal deleted inserted replaced
275:250e49fef6f6 295:640a176c030f
9122 while ( v6 ); 9122 while ( v6 );
9123 } 9123 }
9124 } 9124 }
9125 9125
9126 //----- (00452A9E) -------------------------------------------------------- 9126 //----- (00452A9E) --------------------------------------------------------
9127 int sub_452A9E(int square_distance) 9127 int integer_sqrt(int val)
9128 { 9128 {
9129 signed int result; // eax@2 9129 signed int result; // eax@2
9130 int v2; // edx@3 9130 unsigned int v2; // edx@3
9131 unsigned int v3; // edi@3 9131 unsigned int v3; // edi@3
9132 //signed int v4; // ebx@3 9132 //signed int v4; // ebx@3
9133 int v5; // esi@4 9133 int v5; // esi@4
9134 9134
9135 if (square_distance < 1) 9135 if (val < 1)
9136 return square_distance; 9136 return val;
9137 9137
9138 9138
9139 v2 = 0; 9139 v2 = 0;
9140 v3 = square_distance; 9140 v3 = val;
9141 result = 0; 9141 result = 0;
9142 //v4 = 16; 9142 //v4 = 16;
9143 for (uint i = 0; i < 16; ++i) 9143 for (uint i = 0; i < 16; ++i)
9144 { 9144 {
9145 result *= 2; 9145 result *= 2;
9146 v2 = (v3 >> 30) | 4 * v2; 9146 v2 = (v3 >> 30) | 4 * v2;
9147 v5 = 2 * result + 1; 9147 v5 = 2 * result + 1;
9148 v3 *= 4; 9148 v3 *= 4;
9149 if ( v2 >= (unsigned int)v5 ) 9149 if ( v2 >= v5 )
9150 { 9150 {
9151 ++result; 9151 ++result;
9152 v2 -= v5; 9152 v2 -= v5;
9153 } 9153 }
9154 //--v4; 9154 //--v4;
9155 } 9155 }
9156 //while ( v4 ); 9156 //while ( v4 );
9157 if ( square_distance - result * result >= (unsigned int)(result - 1) ) 9157 if ( val - result * result >= (unsigned int)(result - 1) )
9158 ++result; 9158 ++result;
9159 return result;
9159 } 9160 }
9160 9161
9161 //----- (00452AE2) -------------------------------------------------------- 9162 //----- (00452AE2) --------------------------------------------------------
9162 int __fastcall MakeColorMaskFromBitDepth(int a1) 9163 int __fastcall MakeColorMaskFromBitDepth(int a1)
9163 { 9164 {