Update registers.md

This commit is contained in:
Omar Santos 2018-06-26 21:58:59 -04:00 committed by GitHub
parent a7eea205f5
commit db5a7a9e47
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

View File

@ -1,6 +1,6 @@
# Good Information about Registers
- Intel's Architecture Documentation: https://software.intel.com/en-us/articles/intel-sdm
- Refer to Intel's Architecture Documentation for latest information: https://software.intel.com/en-us/articles/intel-sdm
Additional Notes: The x64 architecture extends x86's 8 general-purpose registers to be 64-bit, and adds 8 new 64-bit registers. The 64-bit registers have names beginning with "r", so for example the 64-bit extension of **eax** is called **rax**. The lower 32 bits, 16 bits, and 8 bits of each register are directly addressable in operands. This includes registers, like **esi**, whose lower 8 bits were not previously addressable. The following table specifies the assembly-language names for the lower portions of 64-bit registers.