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f16cintrin.h
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1 /*===---- f16cintrin.h - F16C intrinsics -----------------------------------===
2  *
3  * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4  * See https://llvm.org/LICENSE.txt for license information.
5  * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6  *
7  *===-----------------------------------------------------------------------===
8  */
9 
10 #if !defined __IMMINTRIN_H
11 #error "Never use <f16cintrin.h> directly; include <immintrin.h> instead."
12 #endif
13 
14 #ifndef __F16CINTRIN_H
15 #define __F16CINTRIN_H
16 
17 /* Define the default attributes for the functions in this file. */
18 #define __DEFAULT_FN_ATTRS128 \
19  __attribute__((__always_inline__, __nodebug__, __target__("f16c"), __min_vector_width__(128)))
20 #define __DEFAULT_FN_ATTRS256 \
21  __attribute__((__always_inline__, __nodebug__, __target__("f16c"), __min_vector_width__(256)))
22 
23 /* NOTE: Intel documents the 128-bit versions of these as being in emmintrin.h,
24  * but that's because icc can emulate these without f16c using a library call.
25  * Since we don't do that let's leave these in f16cintrin.h.
26  */
27 
28 /// Converts a 16-bit half-precision float value into a 32-bit float
29 /// value.
30 ///
31 /// \headerfile <x86intrin.h>
32 ///
33 /// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
34 ///
35 /// \param __a
36 /// A 16-bit half-precision float value.
37 /// \returns The converted 32-bit float value.
38 static __inline float __DEFAULT_FN_ATTRS128
39 _cvtsh_ss(unsigned short __a)
40 {
41  __v8hi __v = {(short)__a, 0, 0, 0, 0, 0, 0, 0};
42  __v4sf __r = __builtin_ia32_vcvtph2ps(__v);
43  return __r[0];
44 }
45 
46 /// Converts a 32-bit single-precision float value to a 16-bit
47 /// half-precision float value.
48 ///
49 /// \headerfile <x86intrin.h>
50 ///
51 /// \code
52 /// unsigned short _cvtss_sh(float a, const int imm);
53 /// \endcode
54 ///
55 /// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
56 ///
57 /// \param a
58 /// A 32-bit single-precision float value to be converted to a 16-bit
59 /// half-precision float value.
60 /// \param imm
61 /// An immediate value controlling rounding using bits [2:0]: \n
62 /// 000: Nearest \n
63 /// 001: Down \n
64 /// 010: Up \n
65 /// 011: Truncate \n
66 /// 1XX: Use MXCSR.RC for rounding
67 /// \returns The converted 16-bit half-precision float value.
68 #define _cvtss_sh(a, imm) \
69  (unsigned short)(((__v8hi)__builtin_ia32_vcvtps2ph((__v4sf){a, 0, 0, 0}, \
70  (imm)))[0])
71 
72 /// Converts a 128-bit vector containing 32-bit float values into a
73 /// 128-bit vector containing 16-bit half-precision float values.
74 ///
75 /// \headerfile <x86intrin.h>
76 ///
77 /// \code
78 /// __m128i _mm_cvtps_ph(__m128 a, const int imm);
79 /// \endcode
80 ///
81 /// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
82 ///
83 /// \param a
84 /// A 128-bit vector containing 32-bit float values.
85 /// \param imm
86 /// An immediate value controlling rounding using bits [2:0]: \n
87 /// 000: Nearest \n
88 /// 001: Down \n
89 /// 010: Up \n
90 /// 011: Truncate \n
91 /// 1XX: Use MXCSR.RC for rounding
92 /// \returns A 128-bit vector containing converted 16-bit half-precision float
93 /// values. The lower 64 bits are used to store the converted 16-bit
94 /// half-precision floating-point values.
95 #define _mm_cvtps_ph(a, imm) \
96  (__m128i)__builtin_ia32_vcvtps2ph((__v4sf)(__m128)(a), (imm))
97 
98 /// Converts a 128-bit vector containing 16-bit half-precision float
99 /// values into a 128-bit vector containing 32-bit float values.
100 ///
101 /// \headerfile <x86intrin.h>
102 ///
103 /// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
104 ///
105 /// \param __a
106 /// A 128-bit vector containing 16-bit half-precision float values. The lower
107 /// 64 bits are used in the conversion.
108 /// \returns A 128-bit vector of [4 x float] containing converted float values.
109 static __inline __m128 __DEFAULT_FN_ATTRS128
111 {
112  return (__m128)__builtin_ia32_vcvtph2ps((__v8hi)__a);
113 }
114 
115 /// Converts a 256-bit vector of [8 x float] into a 128-bit vector
116 /// containing 16-bit half-precision float values.
117 ///
118 /// \headerfile <x86intrin.h>
119 ///
120 /// \code
121 /// __m128i _mm256_cvtps_ph(__m256 a, const int imm);
122 /// \endcode
123 ///
124 /// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
125 ///
126 /// \param a
127 /// A 256-bit vector containing 32-bit single-precision float values to be
128 /// converted to 16-bit half-precision float values.
129 /// \param imm
130 /// An immediate value controlling rounding using bits [2:0]: \n
131 /// 000: Nearest \n
132 /// 001: Down \n
133 /// 010: Up \n
134 /// 011: Truncate \n
135 /// 1XX: Use MXCSR.RC for rounding
136 /// \returns A 128-bit vector containing the converted 16-bit half-precision
137 /// float values.
138 #define _mm256_cvtps_ph(a, imm) \
139  (__m128i)__builtin_ia32_vcvtps2ph256((__v8sf)(__m256)(a), (imm))
140 
141 /// Converts a 128-bit vector containing 16-bit half-precision float
142 /// values into a 256-bit vector of [8 x float].
143 ///
144 /// \headerfile <x86intrin.h>
145 ///
146 /// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
147 ///
148 /// \param __a
149 /// A 128-bit vector containing 16-bit half-precision float values to be
150 /// converted to 32-bit single-precision float values.
151 /// \returns A vector of [8 x float] containing the converted 32-bit
152 /// single-precision float values.
153 static __inline __m256 __DEFAULT_FN_ATTRS256
155 {
156  return (__m256)__builtin_ia32_vcvtph2ps256((__v8hi)__a);
157 }
158 
159 #undef __DEFAULT_FN_ATTRS128
160 #undef __DEFAULT_FN_ATTRS256
161 
162 #endif /* __F16CINTRIN_H */
struct __storeu_i16 *__P __v
Definition: immintrin.h:355
#define __DEFAULT_FN_ATTRS256
Definition: f16cintrin.h:20
static __inline __m128 __DEFAULT_FN_ATTRS128 _mm_cvtph_ps(__m128i __a)
Converts a 128-bit vector containing 16-bit half-precision float values into a 128-bit vector contain...
Definition: f16cintrin.h:110
static __inline__ void int __a
Definition: emmintrin.h:4185
static __inline __m256 __DEFAULT_FN_ATTRS256 _mm256_cvtph_ps(__m128i __a)
Converts a 128-bit vector containing 16-bit half-precision float values into a 256-bit vector of [8 x...
Definition: f16cintrin.h:154
#define __DEFAULT_FN_ATTRS128
Definition: f16cintrin.h:18
static __inline float __DEFAULT_FN_ATTRS128 _cvtsh_ss(unsigned short __a)
Converts a 16-bit half-precision float value into a 32-bit float value.
Definition: f16cintrin.h:39