diff options
Diffstat (limited to 'include')
-rw-r--r-- | include/llvm/Config/config.h.cmake | 3 | ||||
-rw-r--r-- | include/llvm/Config/config.h.in | 3 | ||||
-rw-r--r-- | include/llvm/System/FEnv.h | 50 |
3 files changed, 56 insertions, 0 deletions
diff --git a/include/llvm/Config/config.h.cmake b/include/llvm/Config/config.h.cmake index e8feabf..5e0fa1e 100644 --- a/include/llvm/Config/config.h.cmake +++ b/include/llvm/Config/config.h.cmake @@ -461,6 +461,9 @@ /* Define to 1 if you have the <valgrind/valgrind.h> header file. */ #cmakedefine HAVE_VALGRIND_VALGRIND_H ${HAVE_VALGRIND_VALGRIND_H} +/* Define to 1 if you have the <fenv.h> header file. */ +#cmakedefine HAVE_FENV_H ${HAVE_FENV_H} + /* Define to 1 if you have the <windows.h> header file. */ #cmakedefine HAVE_WINDOWS_H ${HAVE_WINDOWS_H} diff --git a/include/llvm/Config/config.h.in b/include/llvm/Config/config.h.in index d62da1a..6fd274d 100644 --- a/include/llvm/Config/config.h.in +++ b/include/llvm/Config/config.h.in @@ -455,6 +455,9 @@ /* Define to 1 if you have the <valgrind/valgrind.h> header file. */ #undef HAVE_VALGRIND_VALGRIND_H +/* Define to 1 if you have the <fenv.h> header file. */ +#undef HAVE_FENV_H + /* Define to 1 if you have the <windows.h> header file. */ #undef HAVE_WINDOWS_H diff --git a/include/llvm/System/FEnv.h b/include/llvm/System/FEnv.h new file mode 100644 index 0000000..4c72eb2 --- /dev/null +++ b/include/llvm/System/FEnv.h @@ -0,0 +1,50 @@ +//===- llvm/System/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 + +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)) + return true; +#endif + return false; +} + +} // End sys namespace +} // End llvm namespace + +#endif |