1 /* ===-- fixdfti.c - Implement __fixdfti -----------------------------------===
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 __fixdfti for the compiler_rt library.
12 * ===----------------------------------------------------------------------===
19 /* Returns: convert a to a signed long long, rounding toward zero. */
21 /* Assumption: double is a IEEE 64 bit floating point type
22 * su_int is a 32 bit integral type
23 * value in double is representable in ti_int (no range checking performed)
26 /* seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm */
33 int e = ((fb.u.s.high & 0x7FF00000) >> 20) - 1023;
36 ti_int s = (si_int)(fb.u.s.high & 0x80000000) >> 31;
37 ti_int r = 0x0010000000000000uLL | (0x000FFFFFFFFFFFFFuLL & fb.u.all);
45 #endif /* CRT_HAS_128BIT */