发明申请
US20120084533A1 Efficient Parallel Floating Point Exception Handling In A Processor
审中-公开
处理器中有效的并行浮点异常处理
- 专利标题: Efficient Parallel Floating Point Exception Handling In A Processor
- 专利标题(中): 处理器中有效的并行浮点异常处理
-
申请号: US13325559申请日: 2011-12-14
-
公开(公告)号: US20120084533A1公开(公告)日: 2012-04-05
- 发明人: Zeev Sperber , Shachar Finkelstein , Gregory Pribush , Arnit Gradstein , Guy Bale , Thierry Pons
- 申请人: Zeev Sperber , Shachar Finkelstein , Gregory Pribush , Arnit Gradstein , Guy Bale , Thierry Pons
- 主分类号: G06F9/30
- IPC分类号: G06F9/30 ; G06F9/38 ; G06F9/302
摘要:
Methods and apparatus are disclosed for handling floating point exceptions in a processor that executes single-instruction multiple-data (SIMD) instructions. In one embodiment a numerical exception is identified for a SIMD floating point operation and SIMD micro-operations are initiated to generate two packed partial results of a packed result for the SIMD floating point operation. A SIMD denormalization micro-operation is initiated to combine the two packed partial results and to denormalize one or more elements of the combined packed partial results to generate a packed result for the SIMD floating point operation having one or more denormal elements. Flags are set and stored with packed partial results to identify denormal elements. In one embodiment a SIMD normalization micro-operation is initiated to generate a normalized pseudo internal floating point representation prior to the SIMD floating point operation when it uses multiplication.
公开/授权文献
信息查询