Basically, LPSW takes a doubleword, rearranges the bits, and makes a quadword out of it that it then loads into the PSW.
On Wed, Jan 11, 2023 at 10:09 AM Paul Gilmartin < [email protected]> wrote: > On Wed, 11 Jan 2023 15:56:02 +0000, Seymour J Metz wrote: > > >The quoted text is on page 10-56 (p. 1072 in the PDF) of a227832d.pdf, > the June 2022 edition of z/Architecture Principles of Operation, > SA22-7832-13. What is the issue with "doubleword"? > > > If it replaces a 16-byte PSW it should be a quadword. > > (Or does it mean "the content of the location designated by the doubleword > at the > second-operand address"?) > > >________________________________________ > > > >On Wed, 11 Jan 2023 15:30:25 +0000, Seymour J Metz wrote:2 > > > >>Standard nomenclature for System/360, inherited through Z, is > >> > >> Halfword (16 bits) > >> Word (32 bits) > >> Doubleword (64 bits) > >> > >>Quadword (128 bits) is newer. > >> > >If you supply a citation, I'll submit an RCF. > > > >_______________________________________ > >>On Wed, 11 Jan 2023 14:03:24 +0000, Seymour J Metz wrote: > >> > >>>"The current PSW is replaced by a 16-byte PSW > >>>formed from the contents of the doubleword at the > >>>location designated by the second-operand address. > >>>Figure 4-3 on page 4-8 illustrates the contents of the > >>>second operand." > >>> > >>"doubleword"? > > -- > gil > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN > -- Jay Maynard ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
