1214152Sed/* ===-- fixunsxfsi.c - Implement __fixunsxfsi -----------------------------=== 2214152Sed * 3214152Sed * The LLVM Compiler Infrastructure 4214152Sed * 5222656Sed * This file is dual licensed under the MIT and the University of Illinois Open 6222656Sed * Source Licenses. See LICENSE.TXT for details. 7214152Sed * 8214152Sed * ===----------------------------------------------------------------------=== 9214152Sed * 10214152Sed * This file implements __fixunsxfsi for the compiler_rt library. 11214152Sed * 12214152Sed * ===----------------------------------------------------------------------=== 13214152Sed */ 14214152Sed 15214152Sed#if !_ARCH_PPC 16214152Sed 17214152Sed#include "int_lib.h" 18214152Sed 19214152Sed/* Returns: convert a to a unsigned int, rounding toward zero. 20214152Sed * Negative values all become zero. 21214152Sed */ 22214152Sed 23214152Sed/* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes 24214152Sed * su_int is a 32 bit integral type 25214152Sed * value in long double is representable in su_int or is negative 26214152Sed * (no range checking performed) 27214152Sed */ 28214152Sed 29214152Sed/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee | 30214152Sed * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm 31214152Sed */ 32214152Sed 33214152Sedsu_int 34214152Sed__fixunsxfsi(long double a) 35214152Sed{ 36214152Sed long_double_bits fb; 37214152Sed fb.f = a; 38214152Sed int e = (fb.u.high.s.low & 0x00007FFF) - 16383; 39214152Sed if (e < 0 || (fb.u.high.s.low & 0x00008000)) 40214152Sed return 0; 41214152Sed return fb.u.low.s.high >> (31 - e); 42214152Sed} 43214152Sed 44214152Sed#endif /* !_ARCH_PPC */ 45