From 68dd25fbe6e4d3c3513fa5993863419769aa08fc Mon Sep 17 00:00:00 2001 From: Sang-Hoon Park Date: Mon, 19 Oct 2020 16:00:11 +0100 Subject: COMPMID-3637: Move utility headers from arm_compute to src Signed-off-by: Georgios Pinitas Change-Id: If9d6fa8c900b68c4b6fd373f2fc1f9abb83ea917 Signed-off-by: Michalis Spyrou Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4145 Tested-by: Arm Jenkins Reviewed-by: Sang-Hoon Park Comments-Addressed: Arm Jenkins --- support/SaturateCast.h | 218 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 218 insertions(+) create mode 100644 support/SaturateCast.h (limited to 'support/SaturateCast.h') diff --git a/support/SaturateCast.h b/support/SaturateCast.h new file mode 100644 index 0000000000..a9982d8e96 --- /dev/null +++ b/support/SaturateCast.h @@ -0,0 +1,218 @@ +/* + * Copyright (c) 2018-2020 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_UTILS_CAST_SATURATE_CAST_H +#define ARM_COMPUTE_UTILS_CAST_SATURATE_CAST_H + +#include "arm_compute/core/utils/misc/Traits.h" +#include "arm_compute/core/utils/misc/Utility.h" +#include "support/Rounding.h" + +namespace arm_compute +{ +namespace utils +{ +namespace cast +{ +// *INDENT-OFF* +// clang-format off +// same type +template::value, int >::type = 0 > +T saturate_cast(U v) +{ + return v; +} + +// signed -> signed widening/same_width +template::value && + std::is_integral::value && + std::is_signed() && + std::is_signed() && + !std::is_same::value && + sizeof(T) >= sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(v); +} +// signed -> signed narrowing +template::value && + std::is_integral::value && + std::is_signed() && + std::is_signed() && + !std::is_same::value && + sizeof(T) < sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(utility::clamp(v, std::numeric_limits::lowest(), std::numeric_limits::max())); +} + +// unsigned -> signed widening +template::value && + std::is_integral::value && + std::is_unsigned() && + std::is_signed() && + !std::is_same::value && + (sizeof(T) > sizeof(U)), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(v); +} +// unsigned -> signed narrowing +template::value && + std::is_integral::value && + std::is_unsigned() && + std::is_signed() && + !std::is_same::value && + sizeof(T) < sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(std::min(v, std::numeric_limits::max())); +} +// unsigned -> signed same_width +template::value && + std::is_integral::value && + std::is_unsigned() && + std::is_signed() && + !std::is_same::value && + sizeof(T) == sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(std::min(v, std::numeric_limits::max())); +} + +// signed -> unsigned widening/same width +template::value && + std::is_integral::value && + std::is_signed() && + std::is_unsigned() && + !std::is_same::value && + sizeof(T) >= sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(std::max(0, v)); +} + +// signed -> unsigned narrowing +template::value && + std::is_integral::value && + std::is_signed() && + std::is_unsigned() && + !std::is_same::value && + sizeof(T) < sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(utility::clamp(v, 0, std::numeric_limits::max())); +} + +// unsigned -> unsigned widening/same width +template::value && + std::is_integral::value && + std::is_unsigned() && + std::is_unsigned() && + !std::is_same::value && + sizeof(T) >= sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(v); +} + +// unsigned -> unsigned narrowing +template::value && + std::is_integral::value && + std::is_unsigned() && + std::is_unsigned() && + !std::is_same::value && + sizeof(T) < sizeof(U), + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(utility::clamp(v, std::numeric_limits::lowest(), std::numeric_limits::max())); +} + +// float -> int +template::value && + traits::is_floating_point::value, + int >::type = 0 > +inline T saturate_cast(U v) +{ + int32_t vi = utils::rounding::round_half_away_from_zero(v); + return saturate_cast(vi); +} + +// int -> float +template::value && + std::is_integral::value, + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(v); +} + +// float -> float +template::value && + traits::is_floating_point::value, + int >::type = 0 > +inline T saturate_cast(U v) +{ + return static_cast(v); +} +// clang-format on +// *INDENT-ON* +} // namespace cast +} // namespace utils +} // namespace arm_compute +#endif /* ARM_COMPUTE_UTILS_CAST_SATURATE_CAST_H */ -- cgit v1.2.1