🚀 go-pugleaf

"Charlie Gibbs" <cgibbs@nowhere.in.particular> writes:

> How would this compare with the infamous SLT (search list) instruction,
> which was available on certain 360s by RPQ.  If anyone is interested,
> I might be able to dig up a couple of write-ups, one serious and one
> tongue-in-cheek.  SLT's many implied operands gave the latter write-up
> its subtitle of "And you thought BXLE was bad?"

misc. search list reference
http://www.garlic.com/~lynn/93.html#26 MTS LLMPS?
http://www.garlic.com/~lynn/98.html#19 S/360 operating systems geneaology
http://www.garlic.com/~lynn/2000d.html#47 Charging for time-share CPU time
http://www.garlic.com/~lynn/2001c.html#15 OS/360 (was LINUS for S/390)
http://www.garlic.com/~lynn/2001d.html#23 why the machine word size is in radix 8??
http://www.garlic.com/~lynn/2001d.html#33 Very CISC Instuctions (Was: why the machine word size ...)


on 360/67s that didn't have the SLT RPQ, & if CP/67 was generated to
use the instruction in the kernel ... the kernel would take an invalid
instruction interrupt. CP/67 then had a kernel routine that would
simulate the instruction.

from cp/67 reference (pg. 252)

Module name: SLTSIM

Entry point: SLTSIM

Purpose: Simulation of the SLT (search list) instruction on those
360/67s which do not have the RPQ.

Entry conditions:

gpr 0, bits 16-23, contains the key mask.
       bits 24-31, contains the count of the number of elements to be searched
gpr2:  contains the address of the first element (which must be on a doubleword
       boundary)
gpr3:  contains the number of bytes to be compared for the data match (1 through 4)
gpr4:  contains the value of the offset for the data check
gpr5:  contains the value of the offset for the key check
gpr14: contains a pointer to the instruction being simulated

exit conditions

0     - unsuccessful comparion and key test with completion due to count
1     - succesful comparison and unsuccesful key test
2     - unsuccesful comparison and succesful key test
3     - succesful comparison and key test

gpr0:  contains the number of elements unchecked
gpr1:  contains the predecessor element
gpr2:  contains the matched element

========

also misc. sie ref.
http://www.garlic.com/~lynn/94.html#37 SIE instruction (S/390)
http://www.garlic.com/~lynn/2000b.html#50 VM (not VMS or Virtual Machine, the IBM sort)
http://www.garlic.com/~lynn/2000b.html#51 VM (not VMS or Virtual Machine, the IBM sort)
http://www.garlic.com/~lynn/2000b.html#52 VM (not VMS or Virtual Machine, the IBM sort)

-- 
Anne & Lynn Wheeler | ly...@garlic.com - http://www.garlic.com/~lynn/