megenginelite-sys 1.8.2

A safe megenginelite wrapper in Rust
Documentation 
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/**
 * \file dnn/src/x86/elemwise_helper/kimpl/max.h
 * MegEngine is Licensed under the Apache License, Version 2.0 (the "License")
 *
 * Copyright (c) 2014-2021 Megvii Inc. All rights reserved.
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT ARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 */
#pragma once

#include "src/x86/elemwise_helper/kimpl/op_binary_base.h"

namespace megdnn {
namespace x86 {

template <SIMDType simd_type, typename src_ctype, typename dst_ctype = src_ctype>
struct MaxOpBase : BinaryOpBase<simd_type, src_ctype, dst_ctype> {
    using BinaryOpBase<simd_type, src_ctype, dst_ctype>::BinaryOpBase;
    void operator()(
            const src_ctype& src0, const src_ctype& src1, dst_ctype* dst) const {
        *dst = operator()(src0, src1);
    }
    dst_ctype operator()(const src_ctype& src0, const src_ctype& src1) const {
        return src0 < src1 ? src1 : src0;
    }
};

template <SIMDType simd_type, typename src_ctype, typename dst_ctype = src_ctype>
struct MaxOp;

#define OP(                                                                          \
        _ctype, _simd_type, _simd_target, _simd_data_type, _simd_data_type2,         \
        _ptr_type, _func_prefix, _func_suffix1, _func_suffix2, _simd_width)          \
    template <>                                                                      \
    struct MaxOp<_simd_type, _ctype> : MaxOpBase<_simd_type, _ctype> {               \
        using MaxOpBase::MaxOpBase;                                                  \
        using MaxOpBase::operator();                                                 \
        constexpr static size_t SIMD_WIDTH = _simd_width;                            \
        MEGDNN_ATTRIBUTE_TARGET(_simd_target)                                        \
        void operator()(                                                             \
                const _simd_data_type2& src0, const _simd_data_type2& src1,          \
                _ctype* dst) const {                                                 \
            auto vitem = operator()(src0, src1);                                     \
            _##_func_prefix##_storeu_##_func_suffix2(                                \
                    reinterpret_cast<_ptr_type*>(dst), vitem.val[0]);                \
            _##_func_prefix##_storeu_##_func_suffix2(                                \
                    reinterpret_cast<_ptr_type*>(dst + SIMD_WIDTH), vitem.val[1]);   \
        }                                                                            \
        MEGDNN_ATTRIBUTE_TARGET(_simd_target)                                        \
        _simd_data_type2 operator()(                                                 \
                const _simd_data_type2& src0, const _simd_data_type2& src1) const {  \
            auto vitem0 =                                                            \
                    _##_func_prefix##_max_##_func_suffix1(src0.val[0], src1.val[0]); \
            auto vitem1 =                                                            \
                    _##_func_prefix##_max_##_func_suffix1(src0.val[1], src1.val[1]); \
            return {{vitem0, vitem1}};                                               \
        }                                                                            \
        MEGDNN_ATTRIBUTE_TARGET(_simd_target)                                        \
        _simd_data_type operator()(                                                  \
                const _simd_data_type& src0, const _simd_data_type& src1) const {    \
            return _##_func_prefix##_max_##_func_suffix1(src0, src1);                \
        }                                                                            \
    };

OP(dt_float32, SIMDType::SSE4_2, "sse4.2", __m128, __m128x2, float, mm, ps, ps, 4)
OP(dt_int32, SIMDType::SSE4_2, "sse4.2", __m128i, __m128ix2, __m128i, mm, epi32, si128,
   4)
OP(dt_int16, SIMDType::SSE4_2, "sse4.2", __m128i, __m128ix2, __m128i, mm, epi16, si128,
   8)
OP(dt_int8, SIMDType::SSE4_2, "sse4.2", __m128i, __m128ix2, __m128i, mm, epi8, si128,
   16)

OP(dt_float32, SIMDType::AVX2, "avx2", __m256, __m256x2, float, mm256, ps, ps, 8)
OP(dt_int32, SIMDType::AVX2, "avx2", __m256i, __m256ix2, __m256i, mm256, epi32, si256,
   8)
OP(dt_int16, SIMDType::AVX2, "avx2", __m256i, __m256ix2, __m256i, mm256, epi16, si256,
   16)
OP(dt_int8, SIMDType::AVX2, "avx2", __m256i, __m256ix2, __m256i, mm256, epi8, si256, 32)
#undef OP

}  // namespace x86
}  // namespace megdnn

// vim: syntax=cpp.doxygen