Like this?
> STCKE MILLSECS
> LG R1,MILLSECS # IGNORE SECOND DOUBLE WORD
> AGHI R1,15999999 # ROUND UP
> DSGF R1,=F'32000000' # DIVIDE BY 32 MILLION
> STG R1,DOUBLETIME
On 2015-10-28 17:58, Steve Smith wrote:
Also, the CGHI would need to be an CGFI... but Glen's suggestion is better
(so AGFI would be the instruction to use).
sas
On Wed, Oct 28, 2015 at 5:11 PM, glen herrmannsfeldt <[email protected]>
wrote:
SRLG uses a "source" and "target" register as well as #bits.
STCKE MILLSECS
LG R1,MILLSECS # IGNORE SECOND DOUBLE WORD
SRLG R1,R1,5 # SCOOT RIGHT 5 BITS
DSGF R1,=F'1000000' # DIVIDE BY A MILLION
CGHI R0,500000 # COMPARE TO 1/2 MILLION
JL NOADD #DON'T ADD ONE TO RESULT
AGHI R1,1 # ROUND UP
NOADD DS 0H
STG R1,DOUBLETIME
Seems easier to divide by 32000000 instead of shift and divide. Also,
just add the 500000 before divide if you want rounding. By the way,
time() is Posix, not C/C++. (That is, it ins't part of the C
standard, but a separate standard.) Also, the usual epoch is
different from the STCKE epoch, so add another constant for that one.
(Before or after divide.) -- glen
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