When loading 8 bytes into an 64-bit register, you needn't worry about
logical vs. arithmetic. The sign only makes a difference if it's less
than a doubleword being loaded. An LG will load it..
On 2022-04-28 5:20 p.m., Schmitt, Michael wrote:
How did you do it in COBOL?
Gary Weinhold
Senior Application Architect
DATAKINETICS | Data Performance & Optimization
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Email: weinh...@dkl.com
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-----Original Message-----
From: IBM Mainframe Assembler List<ASSEMBLER-LIST@LISTSERV.UGA.EDU> On Behalf
Of Dave Clark
Sent: Tuesday, February 1, 2022 11:39 AM
To:ASSEMBLER-LIST@LISTSERV.UGA.EDU
Subject: Unsigned 64-bit numbers
I previously asked about 32-bit unsigned numbers and that opened up
some new instructions (new to me, anyway: LLGF, LLGH, etc) for loading unsigned
numbers into registers. But now I have need to load a 64-bit unsigned value
into a register and I don't see an LLGD instruction for that.
In case it makes a difference, this value is a timestamp (presumably
from the store-clock instruction) but it is stored in an 8-byte file field.
Now I need to take the file field and turn it into a date and a time value. I
have done this in REXX and COBOL but now I need to do it in assembler.
Actually, I have done something similar in assembler but it was for the CICS
ABSTIME value -- which is a 15-digit packed number, not binary.
So, any hints? Thanks.
Sincerely,
Dave Clark
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