发明名称 |
Method and system for addressing registers in a data processing unit in an indexed addressing mode |
摘要 |
In a data processing unit having a plurality of general purpose registers, an instruction is loaded. Such an instruction includes an operation, and at least one operand field, where the operand field specifies one of a plurality of base registers and a displacement value. To calculate a general purpose register address specified by such an operand field, the displacement value is added to a base value stored in a base register that is specified by a portion of the operand field. Finally, the data processing unit addresses a selected one of the general purpose registers, utilizing the calculated general purpose register address, for execution of the specified operation. Thus, the data processing unit is capable of addressing a larger number of general purpose registers than may be directly addressed utilizing a value represented by a limited number of bits within the operand field.
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申请公布号 |
US5832533(A) |
申请公布日期 |
1998.11.03 |
申请号 |
US19960687825 |
申请日期 |
1996.07.26 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
AGARWAL, RAMESH CHANDRA;GUSTAVSON, FRED G.;JOHNSON, MARK A.;OLSSON, BRETT |
分类号 |
G06F9/30;G06F9/318;G06F9/355;(IPC1-7):G06F12/02;G06F12/06 |
主分类号 |
G06F9/30 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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