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) __extension__ ({ \ 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 110 _mm_cvtph_ps(__m128i __a) 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 154 _mm256_cvtph_ps(__m128i __a) 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 */ 163