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/*
* Copyright (c) 2016-2022 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.
*/
#if defined(ARM_COMPUTE_ENABLE_BF16)
#include "arm_compute/core/TensorInfo.h"
#include "src/cpu/kernels/CpuCastKernel.h"
#include "src/cpu/kernels/cast/list.h"
namespace arm_compute
{
namespace cpu
{
void neon_fp32_to_bfloat16_cast(const ITensor *_src, ITensor *_dst, const ThreadInfo &info, ConvertPolicy _policy, const Window &window)
{
ARM_COMPUTE_UNUSED(info);
ARM_COMPUTE_UNUSED(_policy);
const auto window_start_x = static_cast<int>(window.x().start());
const auto window_end_x = static_cast<int>(window.x().end());
constexpr int window_step_x = 8;
ARM_COMPUTE_ERROR_ON_NULLPTR(_src, _dst);
ARM_COMPUTE_ERROR_ON(_src == _dst);
ARM_COMPUTE_ERROR_ON_NULLPTR(_src, _dst);
Window win{ window };
win.set(Window::DimX, Window::Dimension(0, 1, 1));
Iterator src(_src, win);
Iterator dst(_dst, win);
/* Down-conversion F32 -> BFLOAT16 */
execute_window_loop(win, [&](const Coordinates &)
{
const auto src_ptr = reinterpret_cast<const float *>(src.ptr());
const auto dst_ptr = reinterpret_cast<bfloat16_t *>(dst.ptr());
int x = window_start_x;
const int right_bound = (window_end_x - window_step_x);
for(; x <= right_bound; x += window_step_x)
{
const auto vbf16_0 = vcombine_bf16(
vcvt_bf16_f32(vld1q_f32(src_ptr + x)),
vcvt_bf16_f32(vld1q_f32(src_ptr + x + 4)));
vst1q_bf16(dst_ptr + x, vbf16_0);
}
for(; x < window_end_x; ++x)
{
*(reinterpret_cast<bfloat16 *>(dst.ptr()) + x) = *(src_ptr + x);
}
},
src, dst);
}
void neon_bfloat16_to_fp32_cast(const ITensor *_src, ITensor *_dst, const ThreadInfo &info, ConvertPolicy _policy, const Window &window)
{
ARM_COMPUTE_UNUSED(info);
ARM_COMPUTE_UNUSED(_policy);
const auto window_start_x = static_cast<int>(window.x().start());
const auto window_end_x = static_cast<int>(window.x().end());
constexpr int window_step_x = 8;
ARM_COMPUTE_ERROR_ON_NULLPTR(_src, _dst);
ARM_COMPUTE_ERROR_ON(_src == _dst);
ARM_COMPUTE_ERROR_ON_NULLPTR(_src, _dst);
Window win{ window };
win.set(Window::DimX, Window::Dimension(0, 1, 1));
Iterator src(_src, win);
Iterator dst(_dst, win);
/* Up-conversion BFLOAT16 -> F32 */
execute_window_loop(win, [&](const Coordinates &)
{
const auto src_ptr = reinterpret_cast<const bfloat16_t *>(src.ptr());
const auto dst_ptr = reinterpret_cast<float *>(dst.ptr());
int x = window_start_x;
const int right_bound(window_end_x - window_step_x);
for(; x <= right_bound; x += window_step_x)
{
const bfloat16x8_t vinput = vld1q_bf16(src_ptr + x);
vst1q_f32(dst_ptr + x, vcvt_f32_bf16(vget_low_bf16(vinput)));
vst1q_f32(dst_ptr + x + 4, vcvt_f32_bf16(vget_high_bf16(vinput)));
}
for(; x < window_end_x; ++x)
{
*(dst_ptr + x) = float(*(reinterpret_cast<const bfloat16 *>(src_ptr) + x));
}
},
src, dst);
}
} // namespace cpu
} // namespace arm_compute
#endif /* defined(ARM_COMPUTE_ENABLE_BF16) */
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