公开(公告)号：EP2422270A2

公开(公告)日：2012-02-29

申请号：EP10721863.8

申请日：2010-04-13

申请人： Oracle America, Inc. formerly known as Sun Microsystems, Inc.

发明人： CHAUDHRY, Shailender ,  TREMBLAY, Marc

IPC分类号： G06F9/30

CPC分类号： G06F9/30098 ,  G06F9/30112 ,  G06F9/30138 ,  G06F9/3838 ,  G06F9/384

摘要： A register file, in a processor, includes a first plurality of registers of a first size, n-bits. A decoder uses a mapping that divides the register file into a second plurality M of registers having a second size. Each of the registers having the second size is assigned a different name in a continuous name space. Each register of the second size includes a plurality N of registers of the first size, n-bits. Each register in the plurality N of registers is assigned the same name as the register of the second size that includes that plurality. State information is maintained in the register file for each n-bit register. The dependence of an instruction on other instructions is detected through the continuous name space. The state information allows the processor to determine when the information in any portion, or all, of a register is valid.