GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcompiler_rt/fixxfti.c Lines: 0 13 0.0 %
Date: 2017-11-07 Branches: 0 6 0.0 %

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/* ===-- fixxfti.c - Implement __fixxfti -----------------------------------===
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 *
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 *      	       The LLVM Compiler Infrastructure
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 *
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 * This file is dual licensed under the MIT and the University of Illinois Open
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 * Source Licenses. See LICENSE.TXT for details.
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 *
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 * ===----------------------------------------------------------------------===
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 *
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 * This file implements __fixxfti for the compiler_rt library.
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 *
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 * ===----------------------------------------------------------------------===
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 */
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#include "int_lib.h"
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#ifdef CRT_HAS_128BIT
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/* Returns: convert a to a signed long long, rounding toward zero. */
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/* Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
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 *             ti_int is a 128 bit integral type
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 *             value in long double is representable in ti_int
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 */
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/* gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
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 * 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
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 */
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COMPILER_RT_ABI ti_int
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__fixxfti(long double a)
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{
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    const ti_int ti_max = (ti_int)((~(tu_int)0) / 2);
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    const ti_int ti_min = -ti_max - 1;
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    long_double_bits fb;
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    fb.f = a;
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    int e = (fb.u.high.s.low & 0x00007FFF) - 16383;
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    if (e < 0)
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        return 0;
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    ti_int s = -(si_int)((fb.u.high.s.low & 0x00008000) >> 15);
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    ti_int r = fb.u.low.all;
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    if ((unsigned)e >= sizeof(ti_int) * CHAR_BIT)
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        return a > 0 ? ti_max : ti_min;
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    if (e > 63)
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        r <<= (e - 63);
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    else
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        r >>= (63 - e);
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    return (r ^ s) - s;
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}
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#endif /* CRT_HAS_128BIT */