1 /* ===-- fixxfti.c - Implement __fixxfti -----------------------------------===
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 __fixxfti for the compiler_rt library.
12 * ===----------------------------------------------------------------------===
19 /* Returns: convert a to a signed long long, rounding toward zero. */
21 /* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
22 * su_int is a 32 bit integral type
23 * value in long double is representable in ti_int (no range checking performed)
26 /* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
27 * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
31 __fixxfti(long double a
)
35 int e
= (fb
.u
.high
.s
.low
& 0x00007FFF) - 16383;
38 ti_int s
= -(si_int
)((fb
.u
.high
.s
.low
& 0x00008000) >> 15);
39 ti_int r
= fb
.u
.low
.all
;