发明授权
- 专利标题: Hashed direct-mapped texture cache
- 专利标题(中): 哈希直接映射纹理缓存
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申请号: US09111346申请日: 1998-07-07
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公开(公告)号: US06233647B1公开(公告)日: 2001-05-15
- 发明人: Ole Bentz , Carroll Philip Gossett , Mark Goudy
- 申请人: Ole Bentz , Carroll Philip Gossett , Mark Goudy
- 主分类号: G06F1210
- IPC分类号: G06F1210
摘要:
The present invention pertains to an apparatus for and method of mapping texture memory to a texture cache such that cache contention is minimized. Significantly, in one embodiment of the present invention, addresses of the texture memory are mapped to entries of the texture cache according to a predetermined hashing scheme. According to the one embodiment, texture memory is addressed as a virtually contiguous address space by a multi-dimensional index. The multi-dimensional index is further partitioned into a low order bit field and a high order bit field. Low order bits of the multi-dimensional index are directly mapped to low order bits of the cache address. High order bits of the multi-dimensional index are mapped to high order bits of the cache address according to a predetermined address-hashing scheme. Particularly, in one embodiment, high order bits of the multi-dimensional index are selectively “exclusive-or-ed” to generate corresponding addresses of the texture cache.
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