mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-04 05:17:07 +00:00
385f46146c
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133717 91177308-0d34-0410-b5e6-96231b3b80d8
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
//===- llvm/Support/FEnv.h - Host floating-point exceptions ------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file provides an operating system independent interface to
|
|
// floating-point exception interfaces.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_SYSTEM_FENV_H
|
|
#define LLVM_SYSTEM_FENV_H
|
|
|
|
#include "llvm/Config/config.h"
|
|
#include <cerrno>
|
|
#ifdef HAVE_FENV_H
|
|
#include <fenv.h>
|
|
#endif
|
|
|
|
// FIXME: Clang's #include handling apparently doesn't work for libstdc++'s
|
|
// fenv.h; see PR6907 for details.
|
|
#if defined(__clang__) && defined(_GLIBCXX_FENV_H)
|
|
#undef HAVE_FENV_H
|
|
#endif
|
|
|
|
namespace llvm {
|
|
namespace sys {
|
|
|
|
/// llvm_fenv_clearexcept - Clear the floating-point exception state.
|
|
static inline void llvm_fenv_clearexcept() {
|
|
#ifdef HAVE_FENV_H
|
|
feclearexcept(FE_ALL_EXCEPT);
|
|
#endif
|
|
errno = 0;
|
|
}
|
|
|
|
/// llvm_fenv_testexcept - Test if a floating-point exception was raised.
|
|
static inline bool llvm_fenv_testexcept() {
|
|
int errno_val = errno;
|
|
if (errno_val == ERANGE || errno_val == EDOM)
|
|
return true;
|
|
#ifdef HAVE_FENV_H
|
|
if (fetestexcept(FE_ALL_EXCEPT & ~FE_INEXACT))
|
|
return true;
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
} // End sys namespace
|
|
} // End llvm namespace
|
|
|
|
#endif
|