clang/lib/Headers/f16cintrin.h

/*===---- f16cintrin.h - F16C intrinsics -----------------------------------===
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 *===-----------------------------------------------------------------------===
 */

#if !defined __IMMINTRIN_H
#error "Never use <f16cintrin.h> directly; include <immintrin.h> instead."
#endif

#ifndef __F16CINTRIN_H
#define __F16CINTRIN_H

/* Define the default attributes for the functions in this file. */
#define __DEFAULT_FN_ATTRS \
  __attribute__((__always_inline__, __nodebug__, __target__("f16c")))

/* The 256-bit versions of functions in f16cintrin.h.
   Intel documents these as being in immintrin.h, and
   they depend on typedefs from avxintrin.h. */

/// Converts a 256-bit vector of [8 x float] into a 128-bit vector
///    containing 16-bit half-precision float values.
///
/// \headerfile <x86intrin.h>
///
/// \code
/// __m128i _mm256_cvtps_ph(__m256 a, const int imm);
/// \endcode
///
/// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
///
/// \param a
///    A 256-bit vector containing 32-bit single-precision float values to be
///    converted to 16-bit half-precision float values.
/// \param imm
///    An immediate value controlling rounding using bits [2:0]: \n
///    000: Nearest \n
///    001: Down \n
///    010: Up \n
///    011: Truncate \n
///    1XX: Use MXCSR.RC for rounding
/// \returns A 128-bit vector containing the converted 16-bit half-precision
///    float values.
#define _mm256_cvtps_ph(a, imm) __extension__ ({ \
 (__m128i)__builtin_ia32_vcvtps2ph256((__v8sf)(__m256)(a), (imm)); })

/// Converts a 128-bit vector containing 16-bit half-precision float
///    values into a 256-bit vector of [8 x float].
///
/// \headerfile <x86intrin.h>
///
/// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
///
/// \param __a
///    A 128-bit vector containing 16-bit half-precision float values to be
///    converted to 32-bit single-precision float values.
/// \returns A vector of [8 x float] containing the converted 32-bit
///    single-precision float values.
static __inline __m256 __attribute__((__always_inline__, __nodebug__, __target__("f16c")))
_mm256_cvtph_ps(__m128i __a)
{
  return (__m256)__builtin_ia32_vcvtph2ps256((__v8hi)__a);
}

#undef __DEFAULT_FN_ATTRS

#endif /* __F16CINTRIN_H */