First Commit

common/emitter/implement/bmi.h

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+// SPDX-FileCopyrightText: 2002-2025 PCSX2 Dev Team
+// SPDX-License-Identifier: GPL-3.0+
+
+#pragma once
+
+// Implement BMI1/BMI2 instruction set
+
+namespace x86Emitter
+{
+
+	struct xImplBMI_RVM
+	{
+		u8 Prefix;
+		u8 MbPrefix;
+		u8 Opcode;
+
+		// RVM
+		// MULX 	Unsigned multiply without affecting flags, and arbitrary destination registers
+		// PDEP 	Parallel bits deposit
+		// PEXT 	Parallel bits extract
+		// ANDN 	Logical and not 	~x & y
+		void operator()(const xRegisterInt& to, const xRegisterInt& from1, const xRegisterInt& from2) const;
+		void operator()(const xRegisterInt& to, const xRegisterInt& from1, const xIndirectVoid& from2) const;
+
+#if 0
+		// RMV
+		// BEXTR 	Bit field extract (with register) 	(src >> start) & ((1 << len)-1)[9]
+		// BZHI 	Zero high bits starting with specified bit position
+		// SARX 	Shift arithmetic right without affecting flags
+		// SHRX 	Shift logical right without affecting flags
+		// SHLX 	Shift logical left without affecting flags
+		// FIXME: WARNING same as above but V and M are inverted
+		//void operator()( const xRegisterInt& to, const xRegisterInt& from1, const xRegisterInt& from2) const;
+		//void operator()( const xRegisterInt& to, const xIndirectVoid& from1, const xRegisterInt& from2) const;
+
+		// VM
+		// BLSI 	Extract lowest set isolated bit 	x & -x
+		// BLSMSK 	Get mask up to lowest set bit 	x ^ (x - 1)
+		// BLSR 	Reset lowest set bit 	x & (x - 1)
+		void operator()( const xRegisterInt& to, const xRegisterInt& from) const;
+		void operator()( const xRegisterInt& to, const xIndirectVoid& from) const;
+
+		// RMI
+		//RORX 	Rotate right logical without affecting flags
+		void operator()( const xRegisterInt& to, const xRegisterInt& from, u8 imm) const;
+		void operator()( const xRegisterInt& to, const xIndirectVoid& from, u8 imm) const;
+#endif
+	};
+} // namespace x86Emitter