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/*******************************************************************************
* Copyright 2022-2024 Arm Ltd. and affiliates
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*******************************************************************************/
#include "common/float16.hpp"
#include "cpu/aarch64/acl_gemm_convolution.hpp"
namespace dnnl {
namespace impl {
namespace cpu {
namespace aarch64 {
status_t acl_post_ops_t::execute(
const exec_ctx_t &ctx, void *src, void *dst) const {
int post_op_index = post_op_start_index_;
// By default, dst is expected to be the output buffer. However, in some
// cases we may want to override that behaviour and use a temporary buffer.
if (dst == nullptr) { dst = CTX_OUT_MEM(void *, DNNL_ARG_DST); }
// Sum post-op requires distinct src and dst buffers.
if (has_sum() && dst == src) { return status::runtime_error; }
for (auto &post_op : post_op_primitives) {
if (post_op->kind() == primitive_kind::binary) {
auto binary_post_op = dynamic_cast<acl_binary_t *>(post_op.get());
if (binary_post_op == nullptr) return status::runtime_error;
// Sum post op accumulates to dst and changes future src
if (post_op_index == sum_index) {
CHECK(binary_post_op->execute_forward(ctx, src, dst, dst));
src = dst;
} else {
const void *src_binary = CTX_IN_MEM(const void *,
(DNNL_ARG_ATTR_MULTIPLE_POST_OP(post_op_index)
| DNNL_ARG_SRC_1));
CHECK(binary_post_op->execute_forward(
ctx, src, src_binary, src));
}
} else if (post_op->kind() == primitive_kind::eltwise) {
// The post op at the sum index must be binary
if (post_op_index == sum_index) return status::runtime_error;
auto eltwise_post_op
= dynamic_cast<acl_eltwise_fwd_t *>(post_op.get());
if (eltwise_post_op == nullptr) return status::runtime_error;
if (dst_data_type == data_type::f16) {
// in this case we want to cast the src tensor up to fp32
arm_compute::TensorInfo src_info
= eltwise_post_op->pd()->aep.data_info;
// new src tensor with fp32 datatype
arm_compute::Tensor src_tensor;
src_tensor.allocator()->init(src_info);
src_tensor.allocator()->allocate();
float *src_f32 = (float *)src_tensor.buffer();
// total_size gives the size in bytes, we divide by 4 because the src_tensor is fp32
size_t num_elements = src_tensor.info()->total_size() / 4;
// cast src up to fp32 and store the result in src_f32
cvt_float16_to_float(
src_f32, (dnnl::impl::float16_t *)src, num_elements);
// perform the operation in fp32
status_t eltwise_status = eltwise_post_op->execute_forward(
ctx, src_f32, src_f32);
if (eltwise_status == status::success) {
// cast src_f32 down and store final result in src
cvt_float_to_float16((dnnl::impl::float16_t *)src, src_f32,
num_elements);
}
src_tensor.allocator()->free();
CHECK(eltwise_status);
} else {
CHECK(eltwise_post_op->execute_forward(ctx, src, src));
}
} else {
return status::runtime_error;
}
++post_op_index;
}
return status::success;
}
} // namespace aarch64
} // namespace cpu
} // namespace impl
} // namespace dnnl