72c50e51a5
It seems there have only been a small amount to the compiler-rt source code in the mean time. I'd rather have the code in sync as much as possible by the time we release 9.0. Changes: - The libcompiler_rt library is now dual licensed under both the University of Illinois "BSD-Like" license and the MIT license. - Our local modifications for using .hidden instead of .private_extern have been upstreamed, meaning our changes to lib/assembly.h can now be reverted. - A possible endless recursion in __modsi3() has been fixed. - Support for ARM EABI has been added, but it has no effect on FreeBSD (yet). - The functions __udivmodsi4 and __divmodsi4 have been added. Requested by: many, including bf@ and Pedro Giffuni
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* ===-- floatundixf.c - Implement __floatundixf ---------------------------===
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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 __floatundixf for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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#if !_ARCH_PPC
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#include "int_lib.h"
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/* Returns: convert a to a long double, rounding toward even. */
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/* Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits
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* du_int is a 64 bit integral type
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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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long double
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__floatundixf(du_int a)
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{
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if (a == 0)
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return 0.0;
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const unsigned N = sizeof(du_int) * CHAR_BIT;
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int clz = __builtin_clzll(a);
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int e = (N - 1) - clz ; /* exponent */
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long_double_bits fb;
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fb.u.high.s.low = (e + 16383); /* exponent */
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fb.u.low.all = a << clz; /* mantissa */
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return fb.f;
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}
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#endif /* _ARCH_PPC */
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