查了下,是IBM Enterprise Systems Architecture/390芯片的指令。
可参考链接:
http://www-947.ibm.com/support/entry/portal/search_results?sn=spe&q=ESA/390%20Principles%20of%20Operation&filter=language:en
下载手册:ESA/390 Principles of Operation (SA22-7201-08)
STORE CPU ADDRESS
STAP D(B) [S]
┌────────────────┬────┬────────────┐
│ 'B212' │ B │ D │
└────────────────┴────┴────────────┘
16 2 31
The 16-bit unsigned binary integer by which this
CPU is identified in a multiprocessing configuration
is stored at the halfword location designated
by the second-operand address.
Special Conditions
The operand must be designated on a halfword
boundary; otherwise, a specification exception is
recognized.
Condition Code: The code remains unchanged.
Program Exceptions:
Access (store, operand 2)
Privileged operation
Specification