1*c9945492SAndroid Build Coastguard Worker #include "libm.h" 2*c9945492SAndroid Build Coastguard Worker trunc(double x)3*c9945492SAndroid Build Coastguard Workerdouble trunc(double x) 4*c9945492SAndroid Build Coastguard Worker { 5*c9945492SAndroid Build Coastguard Worker union {double f; uint64_t i;} u = {x}; 6*c9945492SAndroid Build Coastguard Worker int e = (int)(u.i >> 52 & 0x7ff) - 0x3ff + 12; 7*c9945492SAndroid Build Coastguard Worker uint64_t m; 8*c9945492SAndroid Build Coastguard Worker 9*c9945492SAndroid Build Coastguard Worker if (e >= 52 + 12) 10*c9945492SAndroid Build Coastguard Worker return x; 11*c9945492SAndroid Build Coastguard Worker if (e < 12) 12*c9945492SAndroid Build Coastguard Worker e = 1; 13*c9945492SAndroid Build Coastguard Worker m = -1ULL >> e; 14*c9945492SAndroid Build Coastguard Worker if ((u.i & m) == 0) 15*c9945492SAndroid Build Coastguard Worker return x; 16*c9945492SAndroid Build Coastguard Worker FORCE_EVAL(x + 0x1p120f); 17*c9945492SAndroid Build Coastguard Worker u.i &= ~m; 18*c9945492SAndroid Build Coastguard Worker return u.f; 19*c9945492SAndroid Build Coastguard Worker } 20