1 /* ===-- fixdfdi.c - Implement __fixdfdi -----------------------------------===
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 __fixdfdi for the compiler_rt library.
12 * ===----------------------------------------------------------------------===
18 /* Returns: convert a to a signed long long, rounding toward zero. */
20 /* Assumption: double is a IEEE 64 bit floating point type
21 * su_int is a 32 bit integral type
22 * value in double is representable in di_int (no range checking performed)
25 /* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */
27 ARM_EABI_FNALIAS(d2lz, fixdfdi);
34 int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023;
37 di_int s = (si_int)(fb.u.s.high & 0x80000000) >> 31;
39 r.s.high = (fb.u.s.high & 0x000FFFFF) | 0x00100000;
45 return (r.all ^ s) - s;