word-size

What are the sizes of tword, oword and yword operands?

Looking at the nasm source, it looks like: ‘oword”https://stackoverflow.com/”DO’ is 8 times as big as “word” (O for “octoword”), synonymous with dqword (“double-quad”); that would be 128 bits, corresponding to the size of an SSE vector register. ‘tword”https://stackoverflow.com/”DT’ is 80 bits (T for “ten bytes”), the full size of an Intel x87 floating point register. … Read more

Determine word size of my processor

Your assumption about sizeof(int) is untrue; see this. Since you must know the processor, OS and compiler at compilation time, the word size can be inferred using predefined architecture/OS/compiler macros provided by the compiler. However while on simpler and most RISC processors, word size, bus width, register size and memory organisation are often consistently one … Read more