1 /* ===-- fixunsdfdi.c - Implement __fixunsdfdi -----------------------------===
3 * The LLVM Compiler Infrastructure
5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
8 * ===----------------------------------------------------------------------===
10 * This file implements __fixunsdfdi for the compiler_rt library.
12 * ===----------------------------------------------------------------------===
17 /* Returns: convert a to a unsigned long long, rounding toward zero.
18 * Negative values all become zero.
21 /* Assumption: double is a IEEE 64 bit floating point type
22 * du_int is a 64 bit integral type
23 * value in double is representable in du_int or is negative
24 * (no range checking performed)
27 /* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */
29 ARM_EABI_FNALIAS(d2ulz, fixunsdfdi)
31 COMPILER_RT_ABI du_int
32 __fixunsdfdi(double a)
36 int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023;
37 if (e < 0 || (fb.u.s.high & 0x80000000))
40 r.s.high = (fb.u.s.high & 0x000FFFFF) | 0x00100000;