Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!ucbvax!YKTVMH3.BITNET!PERSHNG
From: PERSHNG@YKTVMH3.BITNET ("John A. Pershing Jr.")
Newsgroups: comp.lang.asm370
Subject: (none)
Message-ID: <9011081546.AA18529@ucbvax.Berkeley.EDU>
Date: 8 Nov 90 15:36:57 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Reply-To: IBM 370 Assembly Programming Discussion List
              <ASM370@OHSTVMA.BITNET>
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Organization: The Internet
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If you're coding in 370 Assembler, then simply use the equivalent
machine instructions.  SUBSTR ends up being either an EX (Execute) of
an MVC (Move) instruction for "short" strings, or an MVCL (Move Long)
instruction for "long" strings.  (If you know the length of the "short"
substring a-priori, then you don't need the EX -- just the MVC.)  INDEX
and VERIFY both end up being variants of the TRT (Translate and Test)
instruction.

      John Pershing, IBM Research, Yorktown Heights