mirror of
https://github.com/danbulant/Cosmos
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3060b02e0c
[-] some unnecessary overloads [+] overloaded operators in order to allow defining memory operands easily [+] overloaded automatic conversions to allow operands [+] Labels support [+] code generator based on F# started
64 lines
2.2 KiB
C#
64 lines
2.2 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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namespace Lost.JIT.AMD64
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{
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[Flags]
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public enum Rex : byte
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{
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None = 0x40,
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/// <summary>
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/// Use 64-bit operand size
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/// </summary>
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/// <remarks>
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/// Setting the REX.W bit to 1 specifies a 64-bit operand size. Like the
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/// existing 66h operand-size prefix, the REX 64-bit operand-size override has no effect on byte
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/// operations. For non-byte operations, the REX operand-size override takes precedence over the 66h
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/// prefix. If a 66h prefix is used together with a REX prefix that has the REX.W bit set to 1, the 66h
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/// prefix is ignored. However, if a 66h prefix is used together with a REX prefix that has the REX.W bit
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/// cleared to 0, the 66h prefix is not ignored and the operand size becomes 16 bits.
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///</remarks>
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Wide = None | (1 << 3),
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/// <summary>
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/// Reg index from ModRM extension.
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/// </summary>
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/// <remarks>
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/// The REX.R bit adds a 1-bit (high) extension to the ModRM reg field (page 17)
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/// when that field encodes a GPR, XMM, control, or debug register. REX.R does not modify ModRM reg
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/// when that field specifies other registers or opcodes. REX.R is ignored in such cases.
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/// </remarks>
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Reg = None | (1 << 2),
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/// <summary>
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/// SIB index register extension.
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/// </summary>
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NewRegIndex = None | (1 << 1),
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/// <summary>
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/// SIB index register extension.
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/// Use Index mnenonic instead.
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/// </summary>
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X = None | (1 << 1),
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/// <summary>
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/// Extension of the ModRM r/m field1, SIB base field, or opcode reg field
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/// </summary>
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/// <remarks>
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/// The REX.B bit adds a 1-bit (high) extension to either the ModRM r/m field to specify
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/// a GPR or XMM register, or to the SIB base field to specify a GPR. (See Table 2-2 on page 40 for more
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/// about the REX.B bit.)
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/// </remarks>
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B = None | (1 << 0),
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/// <summary>
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/// Extension of opcode reg field.
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/// </summary>
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NewRegOpcode = B,
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/// <summary>
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/// Extension of base field in SIB
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/// </summary>
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NewRegBase = B,
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/// <summary>
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/// Extension of rm field.
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/// </summary>
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NewRegRM = B,
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}
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}
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