//===-- fixunsxfsi.c - Implement __fixunsxfsi -----------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file implements __fixunsxfsi for the compiler_rt library. // //===----------------------------------------------------------------------===// #if !_ARCH_PPC #include "int_lib.h" // Returns: convert a to a unsigned int, rounding toward zero. // Negative values all become zero. // Assumption: long double is an intel 80 bit floating point type padded with 6 // bytes su_int is a 32 bit integral type value in long double is representable // in su_int or is negative // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee // eeee | 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm // mmmm mmmm mmmm #if defined(_MSC_VER) && !defined(__clang__) // MSVC throws a warning about 'uninitialized variable use' here, // disable it for builds that warn-as-error #pragma warning(push) #pragma warning(disable : 4700) #endif COMPILER_RT_ABI su_int __fixunsxfsi(xf_float a) { xf_bits fb; fb.f = a; int e = (fb.u.high.s.low & 0x00007FFF) - 16383; if (e < 0 || (fb.u.high.s.low & 0x00008000)) return 0; if ((unsigned)e > sizeof(su_int) * CHAR_BIT) return ~(su_int)0; return fb.u.low.s.high >> (31 - e); } #if defined(_MSC_VER) && !defined(__clang__) #pragma warning(pop) #endif #endif // !_ARCH_PPC