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    • 7. 发明申请
    • PROCESSOR AND METHODS FOR IMMEDIATE HANDLING AND FLAG HANDLING
    • 处理器和方法立即处理和标记处理
    • WO2015061687A1
    • 2015-04-30
    • PCT/US2014/062180
    • 2014-10-24
    • ADVANCED MICRO DEVICES, INC.
    • VENKATACHAR, AshokPUNUKOLLU, KarthikAREKAPUDI, SrikanthCHITNIS, Samir A.TALPES, Emil
    • G06F9/06
    • G06F9/384G06F9/30094G06F9/30098G06F9/30167G06F9/3838G06F9/3863G06F9/3865
    • 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.
    • 这里描述了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记重新命名为允许每个组在适当时分开对待的组。 该标志重命名消除了关于指令的标志依赖性。 这允许指令准确地写入指令所需的标志,而无需创建合并依赖关系。 提供了方法和处理器来处理嵌入在指令中的立即值。 解码和执行单元之间的接口添加了一个16位立即总线和一个4位编码/控制总线。 对于8位或12位立即数,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立即总线的前四位。