Re: Assembler Macros

Andy Wood wrote:
spambait@xxxxxxxxxx (Doug Miller) wrote:

In article <kkqu7356m4r3ffd9n2njsr0llf8cigv6ff@xxxxxxx>, Binyamin Dissen <postingid@xxxxxxxxxxxxxxxxxx> wrote:

The purpose of STCM was not to do an unaligned store. It was to allow a
selective store of certain bytes in a register.
Yes, of course. The ability to do an unaligned store is a side effect. Possibly an unintended side effect, but nonetheless a beneficial one.

Didn't the ability to do an unaligned store with a plain old ST
instruction arrive at the same time as STCM?

Yes, but assemblers continued to diagnose it.

--
John W. Kennedy
If Bill Gates believes in "intelligent design", why can't he apply it to Windows?
.

Relevant Pages

  • Re: Assembler Macros
    ... selective store of certain bytes in a register. ... The ability to do an unaligned store is a side effect. ...
    (comp.lang.asm370)
  • Re: Assembler Macros
    ... selective store of certain bytes in a register. ... Didn't the ability to do an unaligned store with a plain old ST ...
    (comp.lang.asm370)
  • Re: Assembler Macros
    ... Doug Miller wrote: ... selective store of certain bytes in a register. ... Is an unaligned four byte STCM faster than an unaligned ST? ...
    (comp.lang.asm370)
  • Re: Assembler Macros
    ... selective store of certain bytes in a register. ... John W. Kennedy ...
    (comp.lang.asm370)