101 lines
4.3 KiB
C++
101 lines
4.3 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2025, 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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// Contributors:
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// alex@minres.com - initial API and implementation
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////////////////////////////////////////////////////////////////////////////////
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#include "vector_functions.h"
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#include "iss/vm_types.h"
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#include <algorithm>
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#include <cassert>
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#include <cstddef>
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#include <cstdint>
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#include <functional>
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#include <limits>
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#include <math.h>
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#include <stdexcept>
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#include <vector>
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namespace softvector {
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bool softvec_read(void* core, uint64_t addr, uint64_t length, uint8_t* data) {
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// Read length bytes from addr into *data
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iss::status status = static_cast<iss::arch_if*>(core)->read(iss::address_type::PHYSICAL, iss::access_type::READ,
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0 /*traits<ARCH>::MEM*/, addr, length, data);
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return status == iss::Ok;
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}
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bool softvec_write(void* core, uint64_t addr, uint64_t length, uint8_t* data) {
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// Write length bytes from addr into *data
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iss::status status = static_cast<iss::arch_if*>(core)->write(iss::address_type::PHYSICAL, iss::access_type::READ,
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0 /*traits<ARCH>::MEM*/, addr, length, data);
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return status == iss::Ok;
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}
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vtype_t::vtype_t(uint32_t vtype_val) { underlying = (vtype_val & 0x8000) << 32 | (vtype_val & ~0x8000); }
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vtype_t::vtype_t(uint64_t vtype_val) { underlying = vtype_val; }
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bool vtype_t::vill() { return underlying >> 63; }
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bool vtype_t::vma() { return (underlying >> 7) & 1; }
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bool vtype_t::vta() { return (underlying >> 6) & 1; }
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unsigned vtype_t::sew() {
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uint8_t vsew = (underlying >> 3) & 0b111;
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// pow(2, 3 + vsew);
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return 1 << (3 + vsew);
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}
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double vtype_t::lmul() {
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uint8_t vlmul = underlying & 0b111;
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assert(vlmul != 0b100); // reserved encoding
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int8_t signed_vlmul = (vlmul >> 2) ? 0b11111000 | vlmul : vlmul;
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return pow(2, signed_vlmul);
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}
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mask_bit_reference& mask_bit_reference::operator=(const bool new_value) {
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*start = *start & ~(1U << pos) | static_cast<unsigned>(new_value) << pos;
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return *this;
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}
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mask_bit_reference::mask_bit_reference(uint8_t* start, uint8_t pos)
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: start(start)
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, pos(pos) {
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assert(pos < 8 && "Bit reference can only be initialized for bytes");
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};
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mask_bit_reference::operator bool() const { return *(start) & (1U << (pos)); }
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mask_bit_reference vmask_view::operator[](size_t idx) const {
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assert(idx < elem_count);
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return {start + idx / 8, static_cast<uint8_t>(idx % 8)};
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}
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vmask_view read_vmask(uint8_t* V, uint16_t VLEN, uint16_t elem_count, uint8_t reg_idx) {
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uint8_t* mask_start = V + VLEN / 8 * reg_idx;
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assert(mask_start + elem_count / 8 <= V + VLEN * RFS / 8);
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return {mask_start, elem_count};
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}
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} // namespace softvector
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