89 lines
3.7 KiB
C++
89 lines
3.7 KiB
C++
/**
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******************************************************************************
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* Xenia : Xbox 360 Emulator Research Project *
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******************************************************************************
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* Copyright 2022 Ben Vanik. All rights reserved. *
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* Released under the BSD license - see LICENSE in the root for more details. *
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******************************************************************************
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*/
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#include "xenia/base/exception_handler.h"
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namespace xe {
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// Based on VIXL Instruction::IsLoad and IsStore.
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// https://github.com/Linaro/vixl/blob/d48909dd0ac62197edb75d26ed50927e4384a199/src/aarch64/instructions-aarch64.cc#L484
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//
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// Copyright 2015, VIXL authors
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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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// * 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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// * 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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// * Neither the name of ARM Limited nor the names of its contributors may be
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// used to endorse or promote products derived from this software without
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// specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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bool IsArm64LoadPrefetchStore(uint32_t instruction, bool& is_store_out) {
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if ((instruction & kArm64LoadLiteralFMask) == kArm64LoadLiteralFixed) {
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return true;
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}
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if ((instruction & kArm64LoadStoreAnyFMask) != kArm64LoadStoreAnyFixed) {
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return false;
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}
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if ((instruction & kArm64LoadStorePairAnyFMask) ==
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kArm64LoadStorePairAnyFixed) {
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is_store_out = !(instruction & kArm64LoadStorePairLoadBit);
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return true;
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}
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switch (Arm64LoadStoreOp(instruction & kArm64LoadStoreMask)) {
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case Arm64LoadStoreOp::kLDRB_w:
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case Arm64LoadStoreOp::kLDRH_w:
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case Arm64LoadStoreOp::kLDR_w:
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case Arm64LoadStoreOp::kLDR_x:
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case Arm64LoadStoreOp::kLDRSB_x:
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case Arm64LoadStoreOp::kLDRSH_x:
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case Arm64LoadStoreOp::kLDRSW_x:
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case Arm64LoadStoreOp::kLDRSB_w:
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case Arm64LoadStoreOp::kLDRSH_w:
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case Arm64LoadStoreOp::kLDR_b:
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case Arm64LoadStoreOp::kLDR_h:
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case Arm64LoadStoreOp::kLDR_s:
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case Arm64LoadStoreOp::kLDR_d:
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case Arm64LoadStoreOp::kLDR_q:
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case Arm64LoadStoreOp::kPRFM:
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is_store_out = false;
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return true;
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case Arm64LoadStoreOp::kSTRB_w:
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case Arm64LoadStoreOp::kSTRH_w:
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case Arm64LoadStoreOp::kSTR_w:
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case Arm64LoadStoreOp::kSTR_x:
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case Arm64LoadStoreOp::kSTR_b:
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case Arm64LoadStoreOp::kSTR_h:
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case Arm64LoadStoreOp::kSTR_s:
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case Arm64LoadStoreOp::kSTR_d:
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case Arm64LoadStoreOp::kSTR_q:
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is_store_out = true;
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return true;
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default:
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return false;
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}
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}
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} // namespace xe
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