Editing Intel 8080 (section)

=====16-bit operations=====
Although the 8080 is generally an 8-bit processor, it has limited abilities to perform 16-bit operations. Any of the three 16-bit register pairs (BC, DE, or HL, referred to as B, D, H in Intel documents) or SP can be loaded with an immediate 16-bit value (using {{code|LXI}}), incremented or decremented (using {{code|INX}} and {{code|DCX}}), or added to HL (using {{code|DAD}}). By adding HL to itself, it is possible to achieve the same result as a 16-bit arithmetical left shift with one instruction. The only 16-bit instructions that affect any flag is {{code|DAD}}, which sets the CY (carry) flag in order to allow for programmed 24-bit or 32-bit [[arithmetic]] (or larger), needed to implement [[floating-point arithmetic]]. BC, DE, HL, or PSW can be copied to and from the stack using {{code|PUSH}} and {{code|POP}}. A stack frame can be allocated using {{code|DAD SP}} and {{code|SPHL}}. A branch to a computed pointer can be executed with {{code|PCHL}}. {{code|LHLD}} loads HL from directly addressed memory and {{code|SHLD}} stores HL likewise. The {{code|XCHG}}<ref>[http://www.classiccmp.org/dunfield/r/8080.txt 8080 instruction encoding] {{Webarchive|url=https://web.archive.org/web/20180305170555/http://www.classiccmp.org/dunfield/r/8080.txt |date=March 5, 2018 }}. ClassicCMP.org. Retrieved on October 23, 2011.</ref> instruction exchanges the values of the HL and DE register pairs. {{code|XTHL}}exchanges last item pushed on stack with HL.