发明授权
- 专利标题： Determining length of instruction with address form field exclusive of evaluating instruction specific opcode in three byte escape opcode
- 专利标题（中）： 用三字节转义操作码来排除指令特定操作码的地址格式字段的指令长度
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申请号： US13417241申请日： 2012-03-10
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公开(公告)号： US08402252B2公开(公告)日： 2013-03-19
- 发明人: James S. Coke , Peter J. Ruscito , Masood Tahir , David B. Jackson , Ves A. Naydenov , Scott D. Rodgers , Bret L. Toll , Frank Binns
- 申请人： James S. Coke , Peter J. Ruscito , Masood Tahir , David B. Jackson , Ves A. Naydenov , Scott D. Rodgers , Bret L. Toll , Frank Binns
- 申请人地址： US CA Santa Clara
- 专利权人： Intel Corporation
- 当前专利权人： Intel Corporation
- 当前专利权人地址： US CA Santa Clara
- 代理机构： Mnemoglyphics, LLC
- 代理商 Lawrence M. Mennemeier
- 主分类号： G06F9/30
- IPC分类号： G06F9/30
摘要：
A method, apparatus and system are disclosed for decoding an instruction in a variable-length instruction set. The instruction is one of a set of new types of instructions that uses a new escape code value, which is two bytes in length, to indicate that a third opcode byte includes the instruction-specific opcode for a new instruction. The new instructions are defined such the length of each instruction in the opcode map for one of the new escape opcode values may be determined using the same set of inputs, where each of the inputs is relevant to determining the length of each instruction in the new opcode map. For at least one embodiment, the length of one of the new instructions is determined without evaluating the instruction-specific opcode.
公开/授权文献
- US20120173852A1 INSTRUCTION SET EXTENSION USING 3-BYTE ESCAPE OPCODE 公开/授权日：2012-07-05