Direct mapped cache tag index offset1/8/2024 Offset = (address > 0) & ((1 > 6) & ((1 > 11) & ((1 << 21) -1) Thank you for the response! So then what would it look like to split up a 64 bit address. Using the first wiki article example, you have 21 tag bits, 5 index bits, 6 offset bits. Wiki article: CPU cache - Wikipedia, the free encyclopedia As you mentioned the number of tag bits is the number of physical address bits - (number of index bits + number of offset bits). If the cache is fully associative, there are no index bits. If the cache is multi-way associative, there will be multiple cache rows that have the same index, which one to use is determined by a match of the tag bits. The index is the portion of the physical address used to index into the cache. Hint: How did I modify my Python program above to generate the data below Addressten Binarytwo Tagten Blockten Offset Hit/Miss 3 00000011 0000 1 1 Miss 180. "Block index", is normally called "block offset", it's the part of the address that is just passed through to select which byte within a cache row is to be used. How would this look? I'll be using unsigned longs, so it can handle up to 64 bits. And I'm hard coding values such as cache size (C) - 1024, number of physical address bits (m) - 32, block size (B) - 2, number of lines per set (E) - 1 (again, directly mapped cache). The tag bits are just the remaining ones. I think I can figure out the set and block index sizes based on the values passed in. I need to break the bits up into 3 sections: tag, set index, and block index. 2) How many total bits are required for a direct-mapped cache with 64kb of data and one-word blocks, assuming. How do I use bit shifting to access the bits to aquire the tag, the index bits, offset bits, block number.all these pieces in order to actually find where I store it in the cache. What block number does byte address 1200 map to. I need to find its tag, the set it goes into, and which line. Indicate the block size, number of blocks, and address field decomposition (block offset, index, and tag bit width) assuming a 32-bit memory address. For a 16K-byte, direct-mapped cache, suppose the block size is 32 bytes, draw a cache diagram. Say I'm trying to access the the bits of the int 5, which are its "address". For a 16K-byte, direct-mapped cache, suppose the block size is 32 bytes, draw a cache diagram. But I need to access individual bits in an integer to figure out where in my "cache" the writing actually gets done. I'm attempting to make a cache simulator in C++.
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