50d848d076
For `LDBL_MANT_DIG == 113` targets the FortranFloat128Math library is just an interface library that provides sources and compilation options to be used for building FortranRuntime - there are not extra dependencies on other libraries, so it can be a part of FortranRuntime, which helps to avoid extra linking steps in the compiler driver. Targets with __float128 support in libc will also use this path. Other targets, where the math support comes from FLANG_RUNTIME_F128_MATH_LIB, FortranFloat128Math is built as a standalone static library, and the compiler driver needs to conduct the linking. Flang APIs for COMPLEX(16) are just thin C wrappers around the C math functions. Flang uses C _Complex ABI for passing/returning COMPLEX values, so the runtime is aligned to this.
29 lines
843 B
C++
29 lines
843 B
C++
//===-- runtime/Float128Math/scale.cpp ------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "math-entries.h"
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#include "numeric-template-specs.h"
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#include <limits>
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namespace Fortran::runtime {
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extern "C" {
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#if LDBL_MANT_DIG == 113 || HAS_FLOAT128
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F128Type RTDEF(Scale16)(F128Type x, std::int64_t p) {
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auto ip{static_cast<int>(p)};
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if (ip != p) {
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ip = p < 0 ? std::numeric_limits<int>::min()
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: std::numeric_limits<int>::max();
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}
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return LDEXPTy<F128Type>::compute(x, ip);
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}
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#endif
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} // extern "C"
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} // namespace Fortran::runtime
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