From d621bca4e963555a99be4328c8d49d1813789649 Mon Sep 17 00:00:00 2001 From: Chunosov Date: Fri, 3 Nov 2017 17:33:15 +0700 Subject: COMPMID-661: directconv-uint8 (#20) Change-Id: I84f7a1ce3658be0d3c91e65096467258af48f0b6 Reviewed-on: http://mpd-gerrit.cambridge.arm.com/94341 Tested-by: Kaizen Reviewed-by: Anthony Barbier --- src/core/CL/cl_kernels/helpers_asymm.h | 91 ++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 src/core/CL/cl_kernels/helpers_asymm.h (limited to 'src/core/CL/cl_kernels/helpers_asymm.h') diff --git a/src/core/CL/cl_kernels/helpers_asymm.h b/src/core/CL/cl_kernels/helpers_asymm.h new file mode 100644 index 0000000000..3c1d58bda1 --- /dev/null +++ b/src/core/CL/cl_kernels/helpers_asymm.h @@ -0,0 +1,91 @@ +/* + * Copyright (c) 2017 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in all + * copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ +#ifndef ARM_COMPUTE_HELPERS_ASYMM_H +#define ARM_COMPUTE_HELPERS_ASYMM_H + +#include "helpers.h" + +/** Correctly-rounded-to-nearest division by a power-of-two. + * + * @param[in] size Size of vector. + * + * @return Correctly-rounded-to-nearest division by a power-of-two. + */ +#define ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(size) \ + inline VEC_DATA_TYPE(int, size) asymm_rounding_divide_by_POW2_##size(VEC_DATA_TYPE(int, size) x, int exponent) \ + { \ + VEC_DATA_TYPE(int, size) \ + mask = (1 << exponent) - 1; \ + const VEC_DATA_TYPE(int, size) zero = 0; \ + const VEC_DATA_TYPE(int, size) one = 1; \ + VEC_DATA_TYPE(int, size) \ + threshold = (mask >> 1) + select(zero, one, x < 0); \ + return (x >> exponent) + select(zero, one, (x & mask) > threshold); \ + } + +ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(8) +ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(16) + +#define ASYMM_ROUNDING_DIVIDE_BY_POW2(x, exponent, size) asymm_rounding_divide_by_POW2_##size(x, exponent) + +/** Product of two numbers, interpreting them as fixed-point values in the interval [-1, 1), + * rounding to the nearest value, and saturating -1 * -1 to the maximum value. + * + * @param[in] size Size of vector. + * + * @return Product of two fixed-point numbers. + */ +#define ASYMM_MULT_IMP(size) \ + inline VEC_DATA_TYPE(int, size) asymm_mult##size(VEC_DATA_TYPE(int, size) a, VEC_DATA_TYPE(int, size) b) \ + { \ + VEC_DATA_TYPE(int, size) \ + overflow = a == b && a == INT_MIN; \ + VEC_DATA_TYPE(long, size) \ + a_64 = convert_long##size(a); \ + VEC_DATA_TYPE(long, size) \ + b_64 = convert_long##size(b); \ + VEC_DATA_TYPE(long, size) \ + ab_64 = a_64 * b_64; \ + VEC_DATA_TYPE(long, size) \ + mask1 = 1 << 30; \ + VEC_DATA_TYPE(long, size) \ + mask2 = 1 - (1 << 30); \ + VEC_DATA_TYPE(long, size) \ + nudge = select(mask2, mask1, ab_64 >= 0); \ + VEC_DATA_TYPE(long, size) \ + mask = 1ll << 31; \ + VEC_DATA_TYPE(int, size) \ + ab_x2_high32 = convert_int##size((ab_64 + nudge) / mask); \ + return select(ab_x2_high32, INT_MAX, overflow); \ + } + +ASYMM_MULT_IMP(8) +ASYMM_MULT_IMP(16) + +#define ASYMM_MULT(a, b, size) asymm_mult##size(a, b) + +#define ASYMM_MULT_BY_QUANT_MULTIPLIER_LESS_THAN_ONE(x, quantized_multiplier, right_shift, size) \ + ASYMM_ROUNDING_DIVIDE_BY_POW2(ASYMM_MULT(x, quantized_multiplier, size), right_shift, size) + +#endif // ARM_COMPUTE_HELPERS_ASYMM_H -- cgit v1.2.1