7c21b327ff
Used to help with generating instruction-specific constants. Currently used for the ternary-logic constants(`vpternlog*`).
47 lines
1.5 KiB
C++
47 lines
1.5 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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#ifndef XENIA_CPU_BACKEND_X64_X64_UTIL_H_
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#define XENIA_CPU_BACKEND_X64_X64_UTIL_H_
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#include "xenia/base/vec128.h"
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#include "xenia/cpu/backend/x64/x64_backend.h"
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#include "xenia/cpu/backend/x64/x64_emitter.h"
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namespace xe {
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namespace cpu {
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namespace backend {
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namespace x64 {
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// Used to generate ternary logic truth-tables for vpternlog
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// Use these to directly refer to terms and perform binary operations upon them
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// and the resulting value will be the ternary lookup table
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// ex:
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// (TernaryOperand::a | ~TernaryOperand::b) & TernaryOperand::c
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// = 0b10100010
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// = 0xa2
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// vpternlog a, b, c, 0xa2
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//
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// ~(TernaryOperand::a ^ TernaryOperand::b) & TernaryOperand::c
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// = 0b10000010
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// = 0x82
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// vpternlog a, b, c, 0x82
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namespace TernaryOperand {
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constexpr uint8_t a = 0b11110000;
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constexpr uint8_t b = 0b11001100;
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constexpr uint8_t c = 0b10101010;
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} // namespace TernaryOperand
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} // namespace x64
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} // namespace backend
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} // namespace cpu
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} // namespace xe
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#endif // XENIA_CPU_BACKEND_X64_X64_UTIL_H_
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