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2. 发明公开

EP3060979A4 PROCESSOR AND METHODS FOR IMMEDIATE HANDLING AND FLAG HANDLING 有权转让
标题翻译： PROZESSOR UND VERFAHREN ZUR SOFORTIGEN MARKIERUNGSHANDHABUNG
公开(公告)号：EP3060979A4
公开(公告)日：2017-07-05
申请号：EP14855674
申请日：2014-10-24
申请人： ADVANCED MICRO DEVICES INC
发明人： VENKATACHAR ASHOK , PUNUKOLLU KARTHIK , AREKAPUDI SRIKANTH , CHITNIS SAMIR A , TALPES EMIL
IPC分类号： G06F9/06
CPC分类号： G06F9/384 , G06F9/30094 , G06F9/30098 , G06F9/30167 , G06F9/3838 , G06F9/3863 , G06F9/3865
摘要： Described herein are methods and processors for flag renaming in groups to eliminate dependencies of instructions. Decoder and execution units in the processor may be configured to rename flags into groups that allow each group to be treated separately as appropriate. This flag renaming eliminates flag dependencies with respect to instructions. This allows an instruction to write exactly the flags that the instruction wants without having to create merge dependencies. Methods and processors are provided for handling immediate values embedded in instructions. A 16 bit immediate bus and a 4 bit encoding/control bus are added at the interface between decode and execution units. For an 8 or 12 bit immediate, the upper 4 bits of the immediate bus contain the encoding bits. For a 16 bit immediate, the encoding/control bus contains the encoding bits. The encoding/control bus indicates when to look at the top four bits of the immediate bus.
摘要翻译：这里描述的是用于组中的标志重命名以消除指令的依赖性的方法和处理器。处理器中的解码器和执行单元可以被配置为将标志重命名为组，从而允许每个组适当分开处理。该标志重命名消除了关于指令的标志依赖性。这允许指令精确地写入指令想要的标志而不必创建合并依赖关系。提供方法和处理器用于处理指令中嵌入的即时值。解码和执行单元之间的接口增加了一个16位立即总线和一个4位编码/控制总线。对于立即数8或12位，立即总线的高4位包含编码位。对于16位立即数，编码/控制总线包含编码位。编码/控制总线指示何时查看直接总线的前四位。

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