发明申请
US20090249039A1 Providing Extended Precision in SIMD Vector Arithmetic Operations
有权
在SIMD矢量算术运算中提供扩展精度
- 专利标题: Providing Extended Precision in SIMD Vector Arithmetic Operations
- 专利标题(中): 在SIMD矢量算术运算中提供扩展精度
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申请号: US12480414申请日: 2009-06-08
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公开(公告)号: US20090249039A1公开(公告)日: 2009-10-01
- 发明人: Timothy Van Hook , Peter Hsu , William A. Huffman , Henry P. Moreton , Earl A. Killian
- 申请人: Timothy Van Hook , Peter Hsu , William A. Huffman , Henry P. Moreton , Earl A. Killian
- 申请人地址: US CA Sunnyvale
- 专利权人: MIPS Technologies, Inc.
- 当前专利权人: MIPS Technologies, Inc.
- 当前专利权人地址: US CA Sunnyvale
- 主分类号: G06F9/302
- IPC分类号: G06F9/302
摘要:
The present invention provides extended precision in SIMD arithmetic operations in a processor having a register file and an accumulator. A first set of data elements and a second set of data elements are loaded into first and second vector registers, respectively. Each data element comprises N bits. Next, an arithmetic instruction is fetched from memory. The arithmetic instruction is decoded. Then, the first vector register and the second vector register are read from the register file. The present invention executes the arithmetic instruction on corresponding data elements in the first and second vector registers. The resulting element of the execution is then written into the accumulator. Then, the resulting element is transformed into an N-bit width element and written into a third register for further operation or storage in memory. The transformation of the resulting element can include, for example, rounding, clamping, and/or shifting the element.