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[x64] Add x64_util.h

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Used to help with generating instruction-specific constants.  Currently
used for the ternary-logic constants(`vpternlog*`).
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Wunkolo 2022-10-23 20:38:14 -07:00 committed by Rick Gibbed
parent eb25fe4f4a
commit 7c21b327ff
1 changed files with 46 additions and 0 deletions
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src/xenia/cpu/backend/x64/x64_util.h Normal file
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/**
******************************************************************************
* Xenia : Xbox 360 Emulator Research Project *
******************************************************************************
* Copyright 2022 Ben Vanik. All rights reserved. *
* Released under the BSD license - see LICENSE in the root for more details. *
******************************************************************************
*/
#ifndef XENIA_CPU_BACKEND_X64_X64_UTIL_H_
#define XENIA_CPU_BACKEND_X64_X64_UTIL_H_
#include "xenia/base/vec128.h"
#include "xenia/cpu/backend/x64/x64_backend.h"
#include "xenia/cpu/backend/x64/x64_emitter.h"
namespace xe {
namespace cpu {
namespace backend {
namespace x64 {
// Used to generate ternary logic truth-tables for vpternlog
// Use these to directly refer to terms and perform binary operations upon them
// and the resulting value will be the ternary lookup table
// ex:
// (TernaryOperand::a | ~TernaryOperand::b) & TernaryOperand::c
// = 0b10100010
// = 0xa2
// vpternlog a, b, c, 0xa2
//
// ~(TernaryOperand::a ^ TernaryOperand::b) & TernaryOperand::c
// = 0b10000010
// = 0x82
// vpternlog a, b, c, 0x82
namespace TernaryOperand {
constexpr uint8_t a = 0b11110000;
constexpr uint8_t b = 0b11001100;
constexpr uint8_t c = 0b10101010;
} // namespace TernaryOperand
} // namespace x64
} // namespace backend
} // namespace cpu
} // namespace xe
#endif // XENIA_CPU_BACKEND_X64_X64_UTIL_H_