clang/lib/Headers/f16cintrin.h

   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 */