1/*===---- f16cintrin.h - F16C intrinsics -----------------------------------===
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
19 * THE SOFTWARE.
20 *
21 *===-----------------------------------------------------------------------===
22 */
23
24#if !defined __X86INTRIN_H && !defined __EMMINTRIN_H && !defined __IMMINTRIN_H
25#error "Never use <f16cintrin.h> directly; include <emmintrin.h> instead."
26#endif
27
28#ifndef __F16CINTRIN_H
29#define __F16CINTRIN_H
30
31/* Define the default attributes for the functions in this file. */
32#define __DEFAULT_FN_ATTRS \
33  __attribute__((__always_inline__, __nodebug__, __target__("f16c")))
34
35/// \brief Converts a 16-bit half-precision float value into a 32-bit float
36///    value.
37///
38/// \headerfile <x86intrin.h>
39///
40/// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
41///
42/// \param __a
43///    A 16-bit half-precision float value.
44/// \returns The converted 32-bit float value.
45static __inline float __DEFAULT_FN_ATTRS
46_cvtsh_ss(unsigned short __a)
47{
48  __v8hi v = {(short)__a, 0, 0, 0, 0, 0, 0, 0};
49  __v4sf r = __builtin_ia32_vcvtph2ps(v);
50  return r[0];
51}
52
53/// \brief Converts a 32-bit single-precision float value to a 16-bit
54///    half-precision float value.
55///
56/// \headerfile <x86intrin.h>
57///
58/// \code
59/// unsigned short _cvtss_sh(float a, const int imm);
60/// \endcode
61///
62/// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
63///
64/// \param a
65///    A 32-bit single-precision float value to be converted to a 16-bit
66///    half-precision float value.
67/// \param imm
68///    An immediate value controlling rounding using bits [2:0]: \n
69///    000: Nearest \n
70///    001: Down \n
71///    010: Up \n
72///    011: Truncate \n
73///    1XX: Use MXCSR.RC for rounding
74/// \returns The converted 16-bit half-precision float value.
75#define _cvtss_sh(a, imm) __extension__ ({ \
76  (unsigned short)(((__v8hi)__builtin_ia32_vcvtps2ph((__v4sf){a, 0, 0, 0}, \
77                                                     (imm)))[0]); })
78
79/// \brief Converts a 128-bit vector containing 32-bit float values into a
80///    128-bit vector containing 16-bit half-precision float values.
81///
82/// \headerfile <x86intrin.h>
83///
84/// \code
85/// __m128i _mm_cvtps_ph(__m128 a, const int imm);
86/// \endcode
87///
88/// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
89///
90/// \param a
91///    A 128-bit vector containing 32-bit float values.
92/// \param imm
93///    An immediate value controlling rounding using bits [2:0]: \n
94///    000: Nearest \n
95///    001: Down \n
96///    010: Up \n
97///    011: Truncate \n
98///    1XX: Use MXCSR.RC for rounding
99/// \returns A 128-bit vector containing converted 16-bit half-precision float
100///    values. The lower 64 bits are used to store the converted 16-bit
101///    half-precision floating-point values.
102#define _mm_cvtps_ph(a, imm) __extension__ ({ \
103  (__m128i)__builtin_ia32_vcvtps2ph((__v4sf)(__m128)(a), (imm)); })
104
105/// \brief Converts a 128-bit vector containing 16-bit half-precision float
106///    values into a 128-bit vector containing 32-bit float values.
107///
108/// \headerfile <x86intrin.h>
109///
110/// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
111///
112/// \param __a
113///    A 128-bit vector containing 16-bit half-precision float values. The lower
114///    64 bits are used in the conversion.
115/// \returns A 128-bit vector of [4 x float] containing converted float values.
116static __inline __m128 __DEFAULT_FN_ATTRS
117_mm_cvtph_ps(__m128i __a)
118{
119  return (__m128)__builtin_ia32_vcvtph2ps((__v8hi)__a);
120}
121
122#undef __DEFAULT_FN_ATTRS
123
124#endif /* __F16CINTRIN_H */
125