1 /*===---- f16cintrin.h - F16C intrinsics -----------------------------------===
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21 *===-----------------------------------------------------------------------===
24 #if !defined __IMMINTRIN_H
25 #error "Never use <f16cintrin.h> directly; include <immintrin.h> instead."
28 #ifndef __F16CINTRIN_H
29 #define __F16CINTRIN_H
31 /* Define the default attributes for the functions in this file. */
32 #define __DEFAULT_FN_ATTRS128 \
33 __attribute__((__always_inline__, __nodebug__, __target__("f16c"), __min_vector_width__(128)))
34 #define __DEFAULT_FN_ATTRS256 \
35 __attribute__((__always_inline__, __nodebug__, __target__("f16c"), __min_vector_width__(256)))
37 /* NOTE: Intel documents the 128-bit versions of these as being in emmintrin.h,
38 * but that's because icc can emulate these without f16c using a library call.
39 * Since we don't do that let's leave these in f16cintrin.h.
42 /// Converts a 16-bit half-precision float value into a 32-bit float
45 /// \headerfile <x86intrin.h>
47 /// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
50 /// A 16-bit half-precision float value.
51 /// \returns The converted 32-bit float value.
52 static __inline float __DEFAULT_FN_ATTRS128
53 _cvtsh_ss(unsigned short __a)
55 __v8hi v = {(short)__a, 0, 0, 0, 0, 0, 0, 0};
56 __v4sf r = __builtin_ia32_vcvtph2ps(v);
60 /// Converts a 32-bit single-precision float value to a 16-bit
61 /// half-precision float value.
63 /// \headerfile <x86intrin.h>
66 /// unsigned short _cvtss_sh(float a, const int imm);
69 /// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
72 /// A 32-bit single-precision float value to be converted to a 16-bit
73 /// half-precision float value.
75 /// An immediate value controlling rounding using bits [2:0]: \n
80 /// 1XX: Use MXCSR.RC for rounding
81 /// \returns The converted 16-bit half-precision float value.
82 #define _cvtss_sh(a, imm) \
83 (unsigned short)(((__v8hi)__builtin_ia32_vcvtps2ph((__v4sf){a, 0, 0, 0}, \
86 /// Converts a 128-bit vector containing 32-bit float values into a
87 /// 128-bit vector containing 16-bit half-precision float values.
89 /// \headerfile <x86intrin.h>
92 /// __m128i _mm_cvtps_ph(__m128 a, const int imm);
95 /// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
98 /// A 128-bit vector containing 32-bit float values.
100 /// An immediate value controlling rounding using bits [2:0]: \n
105 /// 1XX: Use MXCSR.RC for rounding
106 /// \returns A 128-bit vector containing converted 16-bit half-precision float
107 /// values. The lower 64 bits are used to store the converted 16-bit
108 /// half-precision floating-point values.
109 #define _mm_cvtps_ph(a, imm) \
110 (__m128i)__builtin_ia32_vcvtps2ph((__v4sf)(__m128)(a), (imm))
112 /// Converts a 128-bit vector containing 16-bit half-precision float
113 /// values into a 128-bit vector containing 32-bit float values.
115 /// \headerfile <x86intrin.h>
117 /// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
120 /// A 128-bit vector containing 16-bit half-precision float values. The lower
121 /// 64 bits are used in the conversion.
122 /// \returns A 128-bit vector of [4 x float] containing converted float values.
123 static __inline __m128 __DEFAULT_FN_ATTRS128
124 _mm_cvtph_ps(__m128i __a)
126 return (__m128)__builtin_ia32_vcvtph2ps((__v8hi)__a);
129 /// Converts a 256-bit vector of [8 x float] into a 128-bit vector
130 /// containing 16-bit half-precision float values.
132 /// \headerfile <x86intrin.h>
135 /// __m128i _mm256_cvtps_ph(__m256 a, const int imm);
138 /// This intrinsic corresponds to the <c> VCVTPS2PH </c> instruction.
141 /// A 256-bit vector containing 32-bit single-precision float values to be
142 /// converted to 16-bit half-precision float values.
144 /// An immediate value controlling rounding using bits [2:0]: \n
149 /// 1XX: Use MXCSR.RC for rounding
150 /// \returns A 128-bit vector containing the converted 16-bit half-precision
152 #define _mm256_cvtps_ph(a, imm) \
153 (__m128i)__builtin_ia32_vcvtps2ph256((__v8sf)(__m256)(a), (imm))
155 /// Converts a 128-bit vector containing 16-bit half-precision float
156 /// values into a 256-bit vector of [8 x float].
158 /// \headerfile <x86intrin.h>
160 /// This intrinsic corresponds to the <c> VCVTPH2PS </c> instruction.
163 /// A 128-bit vector containing 16-bit half-precision float values to be
164 /// converted to 32-bit single-precision float values.
165 /// \returns A vector of [8 x float] containing the converted 32-bit
166 /// single-precision float values.
167 static __inline __m256 __DEFAULT_FN_ATTRS256
168 _mm256_cvtph_ps(__m128i __a)
170 return (__m256)__builtin_ia32_vcvtph2ps256((__v8hi)__a);
173 #undef __DEFAULT_FN_ATTRS128
174 #undef __DEFAULT_FN_ATTRS256
176 #endif /* __F16CINTRIN_H */