subleafとは 意味・読み方・使い方

名詞

subleaf (plural subleaves)

1. (rare) A smaller leaf making up part of a larger leaf.
   • 2010, Emily Willingham, The Complete Idiot's Guide to College Biology, New York, N.Y.: Alpha, →ISBN, page 244:

     The arrangement of the blades can be as simple as a single blade attached to the stem, or as complicated as subleaves occupying a single petiole, called a compound leaf. Even more complex are the double-compound leaves, with sub-subleaves making up subleaves that make up a larger leaf.

2. (programming, x86) A particular value of the ECX register when a program runs the CPUID instruction within a certain leaf (the value of EAX); each subleaf represents a specific category of information returned about the processor.
   • 2025 March, Intel 64 and IA-32 Architectures Software Developer's Manual‎, volume 2A, page 3-257:

     When CPUID executes with EAX set to 07H and the input value of ECX is invalid (see leaf 07H entry in Table 1-17), the processor returns 0 in EAX/EBX/ECX/EDX. In subleaf 0, EAX returns the maximum input value of the highest leaf 7 sub-leaf, and EBX, ECX & EDX contain information of extended feature flags.