src/core/CL/cl_kernels/helpers_asymm.h

   1 /*
   2  * Copyright (c) 2017-2018 ARM Limited.
   3  *
   4  * SPDX-License-Identifier: MIT
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to
   8  * deal in the Software without restriction, including without limitation the
   9  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  10  * sell copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in all
  14  * copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24 #ifndef ARM_COMPUTE_HELPERS_ASYMM_H
  25 #define ARM_COMPUTE_HELPERS_ASYMM_H
  26
  27 #include "helpers.h"
  28
  29 /** Correctly-rounded-to-nearest division by a power-of-two.
  30  *
  31  * @param[in] size Size of vector.
  32  *
  33  * @return Correctly-rounded-to-nearest division by a power-of-two.
  34  */
  35 #define ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(size)                                                                   \
  36     inline VEC_DATA_TYPE(int, size) asymm_rounding_divide_by_POW2_##size(VEC_DATA_TYPE(int, size) x, int exponent) \
  37     {                                                                                                              \
  38         VEC_DATA_TYPE(int, size)                                                                                   \
  39         mask = (1 << exponent) - 1;                                                                                \
  40         const VEC_DATA_TYPE(int, size) zero = 0;                                                                   \
  41         const VEC_DATA_TYPE(int, size) one  = 1;                                                                   \
  42         VEC_DATA_TYPE(int, size)                                                                                   \
  43         threshold = (mask >> 1) + select(zero, one, x < 0);                                                        \
  44         return (x >> exponent) + select(zero, one, (x & mask) > threshold);                                        \
  45     }
  46
  47 /** Product of two numbers, interpreting them as fixed-point values in the interval [-1, 1),
  48  * rounding to the nearest value, and saturating -1 * -1 to the maximum value.
  49  *
  50  * @param[in] size Size of vector.
  51  *
  52  * @return Product of two fixed-point numbers.
  53  */
  54 #define ASYMM_MULT_IMPL(size)                                                                                \
  55     inline VEC_DATA_TYPE(int, size) asymm_mult##size(VEC_DATA_TYPE(int, size) a, VEC_DATA_TYPE(int, size) b) \
  56     {                                                                                                        \
  57         VEC_DATA_TYPE(int, size)                                                                             \
  58         overflow = a == b && a == INT_MIN;                                                                   \
  59         VEC_DATA_TYPE(long, size)                                                                            \
  60         a_64 = convert_long##size(a);                                                                        \
  61         VEC_DATA_TYPE(long, size)                                                                            \
  62         b_64 = convert_long##size(b);                                                                        \
  63         VEC_DATA_TYPE(long, size)                                                                            \
  64         ab_64 = a_64 * b_64;                                                                                 \
  65         VEC_DATA_TYPE(int, size)                                                                             \
  66         ab_x2_high32 = convert_int##size(((ab_64 + (1 << 30)) >> 31));                                       \
  67         return select(ab_x2_high32, INT_MAX, overflow);                                                      \
  68     }
  69
  70 /** Calculates \f$ exp(x) \f$ for x in [-1/4, 0).
  71  *
  72  * @param[in] size Size of vector.
  73  *
  74  * @return Result in fixed-point format Q0.
  75  */
  76 #define ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL_IMPL(size)                                                    \
  77     inline VEC_DATA_TYPE(int, size) asymm_exp_on_interval_between_negative_one_quarter_and_0_excl##size(VEC_DATA_TYPE(int, size) a) \
  78     {                                                                                                                               \
  79         const VEC_DATA_TYPE(int, size) constant_term     = 1895147668;                                                              \
  80         const VEC_DATA_TYPE(int, size) constant_1_over_3 = 715827883;                                                               \
  81         const int k_fractional_bits = 31;                                                                                           \
  82         VEC_DATA_TYPE(int, size)                                                                                                    \
  83         x = a + (1 << (k_fractional_bits - 3));                                                                                     \
  84         VEC_DATA_TYPE(int, size)                                                                                                    \
  85         x2 = ASYMM_MULT(x, x, size);                                                                                                \
  86         VEC_DATA_TYPE(int, size)                                                                                                    \
  87         x3 = ASYMM_MULT(x2, x, size);                                                                                               \
  88         VEC_DATA_TYPE(int, size)                                                                                                    \
  89         x4 = ASYMM_MULT(x2, x2, size);                                                                                              \
  90         VEC_DATA_TYPE(int, size)                                                                                                    \
  91         x4_over_4 = ASYMM_ROUNDING_DIVIDE_BY_POW2(x4, 2, size);                                                                     \
  92         VEC_DATA_TYPE(int, size)                                                                                                    \
  93         x4_over_24_plus_x3_over_6_plus_x2 = ASYMM_MULT((x4_over_4 + x3), constant_1_over_3, size) + x2;                             \
  94         VEC_DATA_TYPE(int, size)                                                                                                    \
  95         x4_over_24_plus_x3_over_6_plus_x2_over_2 = ASYMM_ROUNDING_DIVIDE_BY_POW2(x4_over_24_plus_x3_over_6_plus_x2, 1, size);       \
  96         return constant_term + ASYMM_MULT(constant_term, x + x4_over_24_plus_x3_over_6_plus_x2_over_2, size);                       \
  97     }
  98
  99 /** Each bit of the result is set to the corresponding bit of either then_val or
 100  * else_val depending on whether the corresponding bit of if_mask is set.
 101  * Equivalent to the VBSL instruction in ARM NEON.
 102  *
 103  * @param[in] size Size of vector.
 104  *
 105  * @returns Result contaning bits from @p then_val or from @p else_val depending on corresponding bit in @p if_mask is set or not.
 106  */
 107 #define ASYMM_SELECT_USING_MASK_IMPL(size)                                                                                                                                \
 108     inline VEC_DATA_TYPE(int, size) asymm_select_using_mask##size(VEC_DATA_TYPE(int, size) if_mask, VEC_DATA_TYPE(int, size) then_val, VEC_DATA_TYPE(int, size) else_val) \
 109     {                                                                                                                                                                     \
 110         return (if_mask & then_val) ^ (~if_mask & else_val);                                                                                                              \
 111     }
 112
 113 /** For each element of input vector, the corresponding bits of the result item are set
 114  * if the input item is zero.
 115  *
 116  * @param[in] size Size of vector.
 117  *
 118  * @returns Output vector with bits set when corresponding bit in @p a is zero.
 119  */
 120 #define ASYMM_MASK_IF_ZERO_IMPL(size)                                                    \
 121     inline VEC_DATA_TYPE(int, size) asymm_mask_if_zero##size(VEC_DATA_TYPE(int, size) a) \
 122     {                                                                                    \
 123         const VEC_DATA_TYPE(int, size) all_zeros = 0;                                    \
 124         const VEC_DATA_TYPE(int, size) all_ones  = ~0;                                   \
 125         return select(all_zeros, all_ones, a == 0);                                      \
 126     }
 127
 128 /** For each element of input vector, the corresponding bits of the result item are set
 129  * if the input item is non-zero.
 130  *
 131  * @param[in] size Size of vector.
 132  *
 133  * @returns Output vector with bits set when corresponding bit in @p a is non zero.
 134  */
 135 #define ASYMM_MASK_IF_NON_ZERO_IMPL(size)                                                    \
 136     inline VEC_DATA_TYPE(int, size) asymm_mask_if_non_zero##size(VEC_DATA_TYPE(int, size) a) \
 137     {                                                                                        \
 138         const VEC_DATA_TYPE(int, size) all_zeros = 0;                                        \
 139         const VEC_DATA_TYPE(int, size) all_ones  = ~0;                                       \
 140         return select(all_zeros, all_ones, a != 0);                                          \
 141     }
 142
 143 #define EXP_BARREL_SHIFTER_IMPL(size)                                                                                                                                                                         \
 144     inline VEC_DATA_TYPE(int, size) exp_barrel_shifter##size(VEC_DATA_TYPE(int, size) result, int exponent, int fp_multiplier, int k_integer_bits, int k_fractional_bits, VEC_DATA_TYPE(int, size) remainder) \
 145     {                                                                                                                                                                                                         \
 146         if(k_integer_bits > exponent)                                                                                                                                                                         \
 147         {                                                                                                                                                                                                     \
 148             const int k_shift_amount = k_integer_bits > exponent ? k_fractional_bits + exponent : 0;                                                                                                          \
 149             return ASYMM_SELECT_USING_MASK(                                                                                                                                                                   \
 150                     ASYMM_MASK_IF_NON_ZERO(remainder & (1 << k_shift_amount), size),                                                                                                                              \
 151                     ASYMM_MULT(result, fp_multiplier, size), result, size);                                                                                                                                       \
 152         }                                                                                                                                                                                                     \
 153         \
 154         return result;                                                                                                                                                                                        \
 155     }
 156
 157 /** Calculates \f$ exp(x) \f$ for x < 0.
 158  *
 159  * @param[in] size Size of vector.
 160  *
 161  * @return Result in fixed-point format Q0.
 162  */
 163 #define ASYMM_EXP_ON_NEGATIVE_VALUES_IMPL(size)                                                                               \
 164     inline VEC_DATA_TYPE(int, size) asymm_exp_on_negative_values##size(VEC_DATA_TYPE(int, size) a, int k_integer_bits)        \
 165     {                                                                                                                         \
 166         const int k_fractional_bits = 31 - k_integer_bits;                                                                    \
 167         VEC_DATA_TYPE(int, size)                                                                                              \
 168         k_one_quarter = 1 << (k_fractional_bits - 2);                                                                         \
 169         VEC_DATA_TYPE(int, size)                                                                                              \
 170         mask = k_one_quarter - 1;                                                                                             \
 171         VEC_DATA_TYPE(int, size)                                                                                              \
 172         a_mod_quarter_minus_one_quarter = (a & mask) - k_one_quarter;                                                         \
 173         VEC_DATA_TYPE(int, size)                                                                                              \
 174         a_mod_quarter_minus_one_quarter_scaled = a_mod_quarter_minus_one_quarter << k_integer_bits;                           \
 175         VEC_DATA_TYPE(int, size)                                                                                              \
 176         result = ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL(a_mod_quarter_minus_one_quarter_scaled, size); \
 177         VEC_DATA_TYPE(int, size)                                                                                              \
 178         remainder = a_mod_quarter_minus_one_quarter - a;                                                                      \
 179         \
 180         result = EXP_BARREL_SHIFTER(result, -2, 1672461947, k_integer_bits, k_fractional_bits, remainder, size);              \
 181         result = EXP_BARREL_SHIFTER(result, -1, 1302514674, k_integer_bits, k_fractional_bits, remainder, size);              \
 182         result = EXP_BARREL_SHIFTER(result, +0, 790015084, k_integer_bits, k_fractional_bits, remainder, size);               \
 183         result = EXP_BARREL_SHIFTER(result, +1, 290630308, k_integer_bits, k_fractional_bits, remainder, size);               \
 184         result = EXP_BARREL_SHIFTER(result, +2, 39332535, k_integer_bits, k_fractional_bits, remainder, size);                \
 185         result = EXP_BARREL_SHIFTER(result, +3, 720401, k_integer_bits, k_fractional_bits, remainder, size);                  \
 186         result = EXP_BARREL_SHIFTER(result, +4, 242, k_integer_bits, k_fractional_bits, remainder, size);                     \
 187         \
 188         if(k_integer_bits > 5)                                                                                                \
 189         {                                                                                                                     \
 190             const VEC_DATA_TYPE(int, size) clamp = -(1 << (k_fractional_bits + 5));                                           \
 191             result = ASYMM_SELECT_USING_MASK(ASYMM_MASK_IF_NON_ZERO(a < clamp, size), 0, result, size);                       \
 192         }                                                                                                                     \
 193         \
 194         const VEC_DATA_TYPE(int, size) Q0_one = INT_MAX;                                                                      \
 195         return ASYMM_SELECT_USING_MASK(ASYMM_MASK_IF_ZERO(a, size), Q0_one, result, size);                                    \
 196     }
 197
 198 /** Calculates the product of a integer value by a power of two, with either a positive exponent
 199  * (equivalent to an arithmetic left shift, saturating) or a negative exponent
 200  * (equivalent to an arithmetic right shift, rounding to nearest).
 201  *
 202  * @param[in] size Size of vector.
 203  *
 204  * @return Arithmetic left or right shift.
 205  */
 206 #define ASYMM_SATURATING_ROUNDING_MULT_BY_POW2_IMPL(size)                                                                  \
 207     inline VEC_DATA_TYPE(int, size) asymm_saturating_rounding_mult_by_pow2##size(VEC_DATA_TYPE(int, size) x, int exponent) \
 208     {                                                                                                                      \
 209         if(exponent < 0)                                                                                                   \
 210         {                                                                                                                  \
 211             return ASYMM_ROUNDING_DIVIDE_BY_POW2(x, -exponent, size);                                                      \
 212         }                                                                                                                  \
 213         \
 214         const VEC_DATA_TYPE(int, size) min = INT_MIN;                                                                      \
 215         const VEC_DATA_TYPE(int, size) max = INT_MAX;                                                                      \
 216         int threshold = ((1 << (31 - exponent)) - 1);                                                                      \
 217         VEC_DATA_TYPE(int, size)                                                                                           \
 218         positive_mask = ASYMM_MASK_IF_NON_ZERO(x > threshold, size);                                                       \
 219         VEC_DATA_TYPE(int, size)                                                                                           \
 220         negative_mask = ASYMM_MASK_IF_NON_ZERO(x < -threshold, size);                                                      \
 221         VEC_DATA_TYPE(int, size)                                                                                           \
 222         result = x << exponent;                                                                                            \
 223         result = ASYMM_SELECT_USING_MASK(positive_mask, max, result, size);                                                \
 224         result = ASYMM_SELECT_USING_MASK(negative_mask, min, result, size);                                                \
 225         return result;                                                                                                     \
 226     }
 227
 228 /** Calculates (a+b)/2, rounded to the nearest integer.
 229  * Equivalent to VRHADD in the ARM NEON instruction set.
 230  *
 231  * @param[in] size Size of vector.
 232  *
 233  * @return (a+b)/2, rounded to the nearest integer.
 234  */
 235 #define ASYMM_ROUNDING_HALF_SUM_IMPL(size)                                                                                \
 236     inline VEC_DATA_TYPE(int, size) asymm_rounding_half_sum##size(VEC_DATA_TYPE(int, size) a, VEC_DATA_TYPE(int, size) b) \
 237     {                                                                                                                     \
 238         VEC_DATA_TYPE(long, size)                                                                                         \
 239         a64 = convert_long##size(a);                                                                                      \
 240         VEC_DATA_TYPE(long, size)                                                                                         \
 241         b64 = convert_long##size(b);                                                                                      \
 242         VEC_DATA_TYPE(long, size)                                                                                         \
 243         sum = a64 + b64;                                                                                                  \
 244         const VEC_DATA_TYPE(long, size) one       = 1;                                                                    \
 245         const VEC_DATA_TYPE(long, size) minus_one = -1;                                                                   \
 246         VEC_DATA_TYPE(long, size)                                                                                         \
 247         sign = select(minus_one, one, sum >= 0);                                                                          \
 248         return convert_int##size((sum + sign) / 2);                                                                       \
 249     }
 250
 251 /** Calculates \f$ 1 / (1 + x) \f$ for x in (0, 1).
 252  *
 253  * @param[in] size Size of vector.
 254  *
 255  * @return Result in fixed-point format Q0.
 256  */
 257 #define ASYMM_ONE_OVER_ONE_PLUS_X_FOR_X_IN_0_1_IMPL(size)                                                    \
 258     inline VEC_DATA_TYPE(int, size) asymm_one_over_one_plus_x_for_x_in_0_1##size(VEC_DATA_TYPE(int, size) a) \
 259     {                                                                                                        \
 260         const VEC_DATA_TYPE(int, size) Q0_one = INT_MAX;                                                     \
 261         const VEC_DATA_TYPE(int, size) Q2_one = 1 << (31 - 2);                                               \
 262         VEC_DATA_TYPE(int, size)                                                                             \
 263         half_denominator = ASYMM_ROUNDING_HALF_SUM(a, Q0_one, size);                                         \
 264         const VEC_DATA_TYPE(int, size) Q2_48_over_17     = 1515870810;                                       \
 265         const VEC_DATA_TYPE(int, size) Q2_neg_32_over_17 = -1010580540;                                      \
 266         VEC_DATA_TYPE(int, size)                                                                             \
 267         x = Q2_48_over_17 + ASYMM_MULT(half_denominator, Q2_neg_32_over_17, size);                           \
 268         for(int i = 0; i < 3; i++)                                                                           \
 269         {                                                                                                    \
 270             VEC_DATA_TYPE(int, size)                                                                         \
 271             half_denominator_times_x = ASYMM_MULT(half_denominator, x, size);                                \
 272             VEC_DATA_TYPE(int, size)                                                                         \
 273             one_minus_half_denominator_times_x = Q2_one - half_denominator_times_x;                          \
 274             VEC_DATA_TYPE(int, size)                                                                         \
 275             tmp = ASYMM_MULT(x, one_minus_half_denominator_times_x, size);                                   \
 276             x   = x + ASYMM_SATURATING_ROUNDING_MULT_BY_POW2(tmp, 2, size);                                  \
 277         }                                                                                                    \
 278         return ASYMM_SATURATING_ROUNDING_MULT_BY_POW2(x, 1, size);                                           \
 279     }
 280
 281 /** Considering the integer value as fixed-point, change the number of integer bits and update value accordingly.
 282  *
 283  * @param[in] size Size of vector.
 284  *
 285  * @return Rescaled value.
 286  */
 287 #define ASYMM_RESCALE_IMPL(size)                                                                                                    \
 288     inline VEC_DATA_TYPE(int, size) asymm_rescale##size(VEC_DATA_TYPE(int, size) value, int src_integer_bits, int dst_integer_bits) \
 289     {                                                                                                                               \
 290         int exponent = src_integer_bits - dst_integer_bits;                                                                         \
 291         return ASYMM_SATURATING_ROUNDING_MULT_BY_POW2(value, exponent, size);                                                       \
 292     }
 293
 294 #define ASYMM_ROUNDING_DIVIDE_BY_POW2(x, exponent, size) asymm_rounding_divide_by_POW2_##size(x, exponent)
 295 #define ASYMM_MULT(a, b, size) asymm_mult##size(a, b)
 296 #define ASYMM_MULT_BY_QUANT_MULTIPLIER_LESS_THAN_ONE(x, quantized_multiplier, right_shift, size) \
 297     ASYMM_ROUNDING_DIVIDE_BY_POW2(ASYMM_MULT(x, quantized_multiplier, size), right_shift, size)
 298 #define ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL(a, size) asymm_exp_on_interval_between_negative_one_quarter_and_0_excl##size(a)
 299 #define ASYMM_SELECT_USING_MASK(if_mask, then_val, else_val, size) asymm_select_using_mask##size(if_mask, then_val, else_val)
 300 #define ASYMM_MASK_IF_ZERO(a, size) asymm_mask_if_zero##size(a)
 301 #define ASYMM_MASK_IF_NON_ZERO(a, size) asymm_mask_if_non_zero##size(a)
 302 #define EXP_BARREL_SHIFTER(result, exponent, fp_multiplier, k_integer_bits, k_fractional_bits, remainder, size) exp_barrel_shifter##size(result, exponent, fp_multiplier, k_integer_bits, k_fractional_bits, remainder)
 303 #define ASYMM_EXP_ON_NEGATIVE_VALUES(a, k_integer_bits, size) asymm_exp_on_negative_values##size(a, k_integer_bits)
 304 #define ASYMM_ONE_OVER_ONE_PLUS_X_FOR_X_IN_0_1(a, size) asymm_one_over_one_plus_x_for_x_in_0_1##size(a)
 305 #define ASYMM_SATURATING_ROUNDING_MULT_BY_POW2(x, exponent, size) asymm_saturating_rounding_mult_by_pow2##size(x, exponent)
 306 #define ASYMM_ROUNDING_HALF_SUM(a, b, size) asymm_rounding_half_sum##size(a, b)
 307 #define ASYMM_RESCALE(value, src_integer_bits, dst_integer_bits, size) asymm_rescale##size(value, src_integer_bits, dst_integer_bits)
 308
 309 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(2)
 310 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(4)
 311 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(8)
 312 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(16)
 313
 314 ASYMM_MULT_IMPL(2)
 315 ASYMM_MULT_IMPL(4)
 316 ASYMM_MULT_IMPL(8)
 317 ASYMM_MULT_IMPL(16)
 318
 319 ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL_IMPL(2)
 320 ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL_IMPL(4)
 321 ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL_IMPL(8)
 322 ASYMM_EXP_ON_INTERVAL_BETWEEN_NEGATIVE_ONE_QUARTER_AND_0_EXCL_IMPL(16)
 323
 324 ASYMM_SELECT_USING_MASK_IMPL(2)
 325 ASYMM_SELECT_USING_MASK_IMPL(4)
 326 ASYMM_SELECT_USING_MASK_IMPL(8)
 327 ASYMM_SELECT_USING_MASK_IMPL(16)
 328
 329 ASYMM_MASK_IF_ZERO_IMPL(2)
 330 ASYMM_MASK_IF_ZERO_IMPL(4)
 331 ASYMM_MASK_IF_ZERO_IMPL(8)
 332 ASYMM_MASK_IF_ZERO_IMPL(16)
 333
 334 ASYMM_MASK_IF_NON_ZERO_IMPL(2)
 335 ASYMM_MASK_IF_NON_ZERO_IMPL(4)
 336 ASYMM_MASK_IF_NON_ZERO_IMPL(8)
 337 ASYMM_MASK_IF_NON_ZERO_IMPL(16)
 338
 339 EXP_BARREL_SHIFTER_IMPL(2)
 340 EXP_BARREL_SHIFTER_IMPL(4)
 341 EXP_BARREL_SHIFTER_IMPL(8)
 342 EXP_BARREL_SHIFTER_IMPL(16)
 343
 344 ASYMM_EXP_ON_NEGATIVE_VALUES_IMPL(2)
 345 ASYMM_EXP_ON_NEGATIVE_VALUES_IMPL(4)
 346 ASYMM_EXP_ON_NEGATIVE_VALUES_IMPL(8)
 347 ASYMM_EXP_ON_NEGATIVE_VALUES_IMPL(16)
 348
 349 ASYMM_SATURATING_ROUNDING_MULT_BY_POW2_IMPL(2)
 350 ASYMM_SATURATING_ROUNDING_MULT_BY_POW2_IMPL(4)
 351 ASYMM_SATURATING_ROUNDING_MULT_BY_POW2_IMPL(8)
 352 ASYMM_SATURATING_ROUNDING_MULT_BY_POW2_IMPL(16)
 353
 354 ASYMM_ROUNDING_HALF_SUM_IMPL(2)
 355 ASYMM_ROUNDING_HALF_SUM_IMPL(4)
 356 ASYMM_ROUNDING_HALF_SUM_IMPL(8)
 357 ASYMM_ROUNDING_HALF_SUM_IMPL(16)
 358
 359 ASYMM_ONE_OVER_ONE_PLUS_X_FOR_X_IN_0_1_IMPL(2)
 360 ASYMM_ONE_OVER_ONE_PLUS_X_FOR_X_IN_0_1_IMPL(4)
 361 ASYMM_ONE_OVER_ONE_PLUS_X_FOR_X_IN_0_1_IMPL(8)
 362 ASYMM_ONE_OVER_ONE_PLUS_X_FOR_X_IN_0_1_IMPL(16)
 363
 364 ASYMM_RESCALE_IMPL(2)
 365 ASYMM_RESCALE_IMPL(4)
 366 ASYMM_RESCALE_IMPL(8)
 367 ASYMM_RESCALE_IMPL(16)
 368
 369 #endif // ARM_COMPUTE_HELPERS_ASYMM_H