TheRock/rocm-libraries/shared/rocroller/lib/include/rocRoller/Utilities/Random_impl.hpp

// Copyright Advanced Micro Devices, Inc., or its affiliates.
// SPDX-License-Identifier: MIT

#pragma once

#include <rocRoller/Utilities/Random.hpp>

namespace rocRoller
{
    template <typename T, typename R>
    std::vector<typename PackedTypeOf<T>::type> RandomGenerator::vector(uint nx, R min, R max)
    {
        using U = typename PackedTypeOf<T>::type;

        std::vector<T>                   x(nx);
        std::uniform_real_distribution<> udist(min, max);

        for(unsigned i = 0; i < nx; i++)
        {
            x[i] = static_cast<T>(udist(m_gen));
        }

        if constexpr(std::is_same_v<T, U>)
        {
            return x;
        }

        if constexpr(std::is_same_v<T, FP6> || std::is_same_v<T, BF6>)
        {
            using F6x16 = std::conditional_t<std::is_same_v<T, FP6>, FP6x16, BF6x16>;
            std::vector<F6x16> y(nx / 16);
            packF6x16(reinterpret_cast<uint32_t*>(y.data()),
                      reinterpret_cast<uint8_t const*>(x.data()),
                      nx);
            return y;
        }

        if constexpr(std::is_same_v<T, FP4>)
        {
            std::vector<FP4x8> y(nx / 8);
            packFP4x8(reinterpret_cast<uint32_t*>(y.data()),
                      reinterpret_cast<uint8_t const*>(x.data()),
                      nx);
            return y;
        }

        Throw<FatalError>("Unhandled packing/segmentation.");
    }

    template <std::integral T>
    T RandomGenerator::next(T min, T max)
    {
        std::uniform_int_distribution<T> dist(min, max);
        return dist(m_gen);
    }
}