222 lines
6.6 KiB
C++
222 lines
6.6 KiB
C++
/*******************************************************************************
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* Copyright (C) 2017, 2018 MINRES Technologies GmbH
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*******************************************************************************/
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#ifndef _RV32IMAC_H_
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#define _RV32IMAC_H_
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#include <array>
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#include <iss/arch/traits.h>
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#include <iss/arch_if.h>
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#include <iss/vm_if.h>
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namespace iss {
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namespace arch {
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struct rv32imac;
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template <> struct traits<rv32imac> {
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constexpr static char const *const core_type = "RV32IMAC";
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enum constants {
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XLEN = 32,
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PCLEN = 32,
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MISA_VAL = 0b1000000000101000001000100000101,
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PGSIZE = 0x1000,
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PGMASK = 0xfff
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};
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constexpr static unsigned FP_REGS_SIZE = 0;
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enum reg_e {
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X0,
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X1,
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X2,
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X3,
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X4,
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X5,
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X6,
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X7,
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X8,
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X9,
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X10,
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X11,
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X12,
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X13,
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X14,
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X15,
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X16,
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X17,
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X18,
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X19,
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X20,
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X21,
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X22,
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X23,
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X24,
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X25,
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X26,
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X27,
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X28,
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X29,
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X30,
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X31,
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PC,
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NUM_REGS,
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NEXT_PC = NUM_REGS,
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TRAP_STATE,
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PENDING_TRAP,
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MACHINE_STATE,
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LAST_BRANCH,
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ICOUNT
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};
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using reg_t = uint32_t;
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using addr_t = uint32_t;
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using code_word_t = uint32_t; // TODO: check removal
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using virt_addr_t = iss::typed_addr_t<iss::address_type::VIRTUAL>;
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using phys_addr_t = iss::typed_addr_t<iss::address_type::PHYSICAL>;
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static constexpr std::array<const uint32_t, 39> RV32IMAC_reg_size{
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{32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
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32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 64}};
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constexpr static unsigned reg_bit_width(unsigned r) { return RV32IMAC_reg_size[r]; }
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static constexpr std::array<const uint32_t, 40> RV32IMAC_reg_byte_offset{
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{0, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40, 44, 48, 52, 56, 60, 64, 68, 72, 76,
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80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 148, 152, 160}};
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constexpr static unsigned reg_byte_offset(unsigned r) { return RV32IMAC_reg_byte_offset[r]; }
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static const uint64_t addr_mask = (reg_t(1) << (XLEN - 1)) | ((reg_t(1) << (XLEN - 1)) - 1);
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enum sreg_flag_e { FLAGS };
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enum mem_type_e { MEM, CSR, FENCE, RES };
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};
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struct rv32imac : public arch_if {
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using virt_addr_t = typename traits<rv32imac>::virt_addr_t;
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using phys_addr_t = typename traits<rv32imac>::phys_addr_t;
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using reg_t = typename traits<rv32imac>::reg_t;
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using addr_t = typename traits<rv32imac>::addr_t;
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rv32imac();
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~rv32imac();
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void reset(uint64_t address = 0) override;
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uint8_t *get_regs_base_ptr() override;
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/// deprecated
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void get_reg(short idx, std::vector<uint8_t> &value) override {}
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void set_reg(short idx, const std::vector<uint8_t> &value) override {}
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/// deprecated
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bool get_flag(int flag) override { return false; }
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void set_flag(int, bool value) override{};
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/// deprecated
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void update_flags(operations op, uint64_t opr1, uint64_t opr2) override{};
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inline uint64_t get_icount() { return reg.icount; }
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inline bool should_stop() { return interrupt_sim; }
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inline phys_addr_t v2p(const iss::addr_t &addr) {
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if (addr.space != traits<rv32imac>::MEM || addr.type == iss::address_type::PHYSICAL ||
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addr_mode[static_cast<uint16_t>(addr.access) & 0x3] == address_type::PHYSICAL) {
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return phys_addr_t(addr.access, addr.space, addr.val & traits<rv32imac>::addr_mask);
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} else
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return virt2phys(addr);
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}
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virtual phys_addr_t virt2phys(const iss::addr_t &addr);
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virtual iss::sync_type needed_sync() const { return iss::NO_SYNC; }
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inline uint32_t get_last_branch() { return reg.last_branch; }
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protected:
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struct RV32IMAC_regs {
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uint32_t X0 = 0;
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uint32_t X1 = 0;
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uint32_t X2 = 0;
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uint32_t X3 = 0;
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uint32_t X4 = 0;
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uint32_t X5 = 0;
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uint32_t X6 = 0;
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uint32_t X7 = 0;
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uint32_t X8 = 0;
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uint32_t X9 = 0;
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uint32_t X10 = 0;
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uint32_t X11 = 0;
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uint32_t X12 = 0;
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uint32_t X13 = 0;
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uint32_t X14 = 0;
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uint32_t X15 = 0;
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uint32_t X16 = 0;
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uint32_t X17 = 0;
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uint32_t X18 = 0;
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uint32_t X19 = 0;
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uint32_t X20 = 0;
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uint32_t X21 = 0;
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uint32_t X22 = 0;
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uint32_t X23 = 0;
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uint32_t X24 = 0;
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uint32_t X25 = 0;
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uint32_t X26 = 0;
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uint32_t X27 = 0;
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uint32_t X28 = 0;
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uint32_t X29 = 0;
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uint32_t X30 = 0;
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uint32_t X31 = 0;
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uint32_t PC = 0;
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uint32_t NEXT_PC = 0;
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uint32_t trap_state = 0, pending_trap = 0, machine_state = 0, last_branch = 0;
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uint64_t icount = 0;
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} reg;
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std::array<address_type, 4> addr_mode;
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bool interrupt_sim = false;
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uint32_t get_fcsr() { return 0; }
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void set_fcsr(uint32_t val) {}
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};
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}
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}
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#endif /* _RV32IMAC_H_ */
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