1*7c3d14c8STreehugger Robot /* ===-- fixunsxfdi.c - Implement __fixunsxfdi -----------------------------=== 2*7c3d14c8STreehugger Robot * 3*7c3d14c8STreehugger Robot * The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot * 5*7c3d14c8STreehugger Robot * This file is dual licensed under the MIT and the University of Illinois Open 6*7c3d14c8STreehugger Robot * Source Licenses. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot * 8*7c3d14c8STreehugger Robot * ===----------------------------------------------------------------------=== 9*7c3d14c8STreehugger Robot * 10*7c3d14c8STreehugger Robot * This file implements __fixunsxfdi for the compiler_rt library. 11*7c3d14c8STreehugger Robot * 12*7c3d14c8STreehugger Robot * ===----------------------------------------------------------------------=== 13*7c3d14c8STreehugger Robot */ 14*7c3d14c8STreehugger Robot 15*7c3d14c8STreehugger Robot #if !_ARCH_PPC 16*7c3d14c8STreehugger Robot 17*7c3d14c8STreehugger Robot #include "int_lib.h" 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot /* Returns: convert a to a unsigned long long, rounding toward zero. 20*7c3d14c8STreehugger Robot * Negative values all become zero. 21*7c3d14c8STreehugger Robot */ 22*7c3d14c8STreehugger Robot 23*7c3d14c8STreehugger Robot /* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes 24*7c3d14c8STreehugger Robot * du_int is a 64 bit integral type 25*7c3d14c8STreehugger Robot * value in long double is representable in du_int or is negative 26*7c3d14c8STreehugger Robot * (no range checking performed) 27*7c3d14c8STreehugger Robot */ 28*7c3d14c8STreehugger Robot 29*7c3d14c8STreehugger Robot /* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | 30*7c3d14c8STreehugger Robot * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm 31*7c3d14c8STreehugger Robot */ 32*7c3d14c8STreehugger Robot 33*7c3d14c8STreehugger Robot COMPILER_RT_ABI du_int __fixunsxfdi(long double a)34*7c3d14c8STreehugger Robot__fixunsxfdi(long double a) 35*7c3d14c8STreehugger Robot { 36*7c3d14c8STreehugger Robot long_double_bits fb; 37*7c3d14c8STreehugger Robot fb.f = a; 38*7c3d14c8STreehugger Robot int e = (fb.u.high.s.low & 0x00007FFF) - 16383; 39*7c3d14c8STreehugger Robot if (e < 0 || (fb.u.high.s.low & 0x00008000)) 40*7c3d14c8STreehugger Robot return 0; 41*7c3d14c8STreehugger Robot if ((unsigned)e > sizeof(du_int) * CHAR_BIT) 42*7c3d14c8STreehugger Robot return ~(du_int)0; 43*7c3d14c8STreehugger Robot return fb.u.low.all >> (63 - e); 44*7c3d14c8STreehugger Robot } 45*7c3d14c8STreehugger Robot 46*7c3d14c8STreehugger Robot #endif 47