llvm-project/clang/lib/Headers/fxsrintrin.h

/*===---- fxsrintrin.h - FXSR intrinsic ------------------------------------===
 *
 * 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
 *
 *===-----------------------------------------------------------------------===
 */

#ifndef __IMMINTRIN_H
#error "Never use <fxsrintrin.h> directly; include <immintrin.h> instead."
#endif

#ifndef __FXSRINTRIN_H
#define __FXSRINTRIN_H

#define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__,  __target__("fxsr")))

/// Saves the XMM, MMX, MXCSR and x87 FPU registers into a 512-byte
///    memory region pointed to by the input parameter \a __p.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> FXSAVE </c> instruction.
///
/// \param __p
///    A pointer to a 512-byte memory region. The beginning of this memory
///    region should be aligned on a 16-byte boundary.
static __inline__ void __DEFAULT_FN_ATTRS
_fxsave(void *__p)
{
  __builtin_ia32_fxsave(__p);
}

/// Restores the XMM, MMX, MXCSR and x87 FPU registers from the 512-byte
///    memory region pointed to by the input parameter \a __p. The contents of
///    this memory region should have been written to by a previous \c _fxsave
///    or \c _fxsave64 intrinsic.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> FXRSTOR </c> instruction.
///
/// \param __p
///    A pointer to a 512-byte memory region. The beginning of this memory
///    region should be aligned on a 16-byte boundary.
static __inline__ void __DEFAULT_FN_ATTRS
_fxrstor(void *__p)
{
  __builtin_ia32_fxrstor(__p);
}

#ifdef __x86_64__
/// Saves the XMM, MMX, MXCSR and x87 FPU registers into a 512-byte
///    memory region pointed to by the input parameter \a __p.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> FXSAVE64 </c> instruction.
///
/// \param __p
///    A pointer to a 512-byte memory region. The beginning of this memory
///    region should be aligned on a 16-byte boundary.
static __inline__ void __DEFAULT_FN_ATTRS
_fxsave64(void *__p)
{
  __builtin_ia32_fxsave64(__p);
}

/// Restores the XMM, MMX, MXCSR and x87 FPU registers from the 512-byte
///    memory region pointed to by the input parameter \a __p. The contents of
///    this memory region should have been written to by a previous \c _fxsave
///    or \c _fxsave64 intrinsic.
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> FXRSTOR64 </c> instruction.
///
/// \param __p
///    A pointer to a 512-byte memory region. The beginning of this memory
///    region should be aligned on a 16-byte boundary.
static __inline__ void __DEFAULT_FN_ATTRS
_fxrstor64(void *__p)
{
  __builtin_ia32_fxrstor64(__p);
}
#endif

#undef __DEFAULT_FN_ATTRS

#endif