The CDCCRAY is a FORTRAN subroutine which runs on the Cray and converts 32 or 64 bit binary data from the CDC Cyber 205 to the corresponding 64 bit binary data for the Cray X-MP. The CDCCRAY's purpose, usage, storage, timing consideration, and linkage editing are discussed

Guest, C. J.

English

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Produced by the NASA Center for Aerospace Information (CASI) 
https://ntrs.nasa.gov/search.jsp?R=19850027327 2020-03-20T17:11:53+00:00Z
CONTRACT NAS2— 11555
+	 "larch, 1985
NASA
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NASA CONTRACTOR RETORT 177375
I	 CDCCRAY
Clayton J. Guest
;NA5A-CF-177375) CDCCFkY (Informatics-PlI,
Inc.)
	 11 p HC L`: 2/M r A101	 CSCL 03B
NS-5-35640
Unclas
,i3/61	 26285
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NASA CONTRACTOR REPCRT 177375
MCCRAY
Clayton J. Guest
Informatics General Corporation
1121 San Anton:;, Road
Palo Alto, CA 94303
Prepared for
Ames Research Center
Contract NAS2-11555
NAM
National Ae onaut;cs and
Space Administration
Ames Resesrch Center
Moffett Feld, California 94035
1
MU
Section 1 Purpose	 1
Section Z Usage	 2
Section 3 Storage	 3
Section 4 Timing Consideration	 4
Section 5 Linkage Editing	 5
Table I - Conversion Options 	 3
Table II - IERROR (Error Codes Returned)	 3
Timing Considerations Graph	 6
CDCCRAY is a FORTRAN
convert either 32 bit
Corporation's "Cyber
binary data for CRAY
Section 2
Usage
The entry point to the subroutine is CDCCRAY. To call the
subroutine use the following FORTRAN statement:
CALL CDCCRAY (NWORDS, VECTRIN, VECTROUT, ITYPE, IERROR)
where the arguments have the following definition:
WORDS	 the number of CYBER 2XX words to be converted.
Must be integer.
VECTRIN* is a vector of CYBER 2XX 64 bit words to be
converted to CRAY format. VECTRIN may be real
or integer.
VECTROUT* is a vector to receive the converted words.
This vector is the result and is in CRAY format
(binary). VECTROUT may be either real or
integer.
ITYPE	 is a value which specifies the type of
conversion. (see cable I) Must be integer.
IERROR	 is a value assigned should an error be detected
(see table II). Must be integer.
*note:
VECTRIN and VECTROUT may be the same vectors except when
converting "CYBER 2XX" 32 bit words. When converting "CYBER
2XX" 32 bit words it is necessary for VECTRIN and VECTROUT to be
unique vectors and VECTRIN contains two 32 bit words per each 64
bit word. The odd numbered words must be in the left half and
tho ="an ni'mhnraA WnV-AQ in tha ri nht ha 1 f _
Table-1 - Conversion ORtions
ypg	 Definition
	
1	 Integer conversion of "CYBER 2XX" to CRAY.
	
2	 Real conversion of "CYBER 2XX" 64 bit words to
CRAY 64 bit.
	3	 Real conversion of "CYBER 2XX" 32 bit words to
CRAY 64 bit.
Table II - IERROR (Error Codes Returned)
IERROR	 Definition
	
0	 No errors
	
1	 Argument value of NWORDS incorrect. NWORDS
must be a positive integer.
	
2	 Argument value of ITYPE incorrect. Value of
ITYPE must be 1, 2, or 3 as shown in table I.
	
3	 Arguments VECTRIN and VECTROUT are either the
same or overlaps when converting real 32 bit
values.
	
4	 Can not convert a real variable. VECTRIN
value was indefinite or not ncrmalized.
Result stored in VECTROUT is set to 64 one
bits.
	
5	 Can not convert an integer variable. VECTRIN
was not in "CYBER 2XX" in , .eger format. R%isult
stored in VECTROUT is set to 64 one bits.,
*Notes: When IERROR is returned to calling module with a value
of 1, 2, or 3 the call to CDCCRAY was aborted and no conversion
was attempted VECTRIN and VECTROUT remains as called.
When IERROR is returned to calling module with a value of 4 or 5
words which were convertible were converted.
3
V
Section 3
This subroutine requires 261 decimal words or 405 octal words of
CRAY memory.
i
4
Section 4
Each group of fifty integers converted from the CYHER 2x70
internal binary format t2 CRAY internal binary requires
approximately .56 x 10 - seconds. The conversion of fifty 64
bit_5eal values in binary format requires approximately .135 x
10	 seconds. A conve-sion of fifty real 32 bit binary words
to 64 binary words requires approximately .22 x 10
	 seconds.
The approximate timings from 0 to 1004 words are shown in the
following graph.
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Section 5
Linkage Editing
To use subroutine CDCCRAY the following job ^ontrol language
must be included in the users job atream before the program is
executed.
ACCESS,DN-SOFTLIB,ID-SOFTLIB.	 4
LDR,LIB-SOFTLIB,etc.
Examples
Example 1.	 Convert a vector of 512 integers from the CYBER
2XX to a vector of integer for the CRAY. The
	 i
input vector is ICYBER and the output vector is
1CRAY.
INTEGER ICRAY(512), ICYBER(512)
ITYPE-1
KOUNT-512
CALL CDCCRAY(KOUNT,ICYBER,ICRAY,KTYPE,IGOOF)
IF (IGOOF .NE. 0) Go to error processing.
Example 2.	 Convert a vector of 257 CYBER 2XX 32 bit real
numbers to CRAY real numbers. The input vector,
CYBER, has 2 32 bit words per 64 bit word. The
output vector, CRAY, receives the counted words.
DIMENSION CRAY(257), CYBER(129)
N-257
ITYPE-3
CALL --DCCRAY(N,CYBER,CRAY,ITYPE,IERROR)
IF(IERROR) .NE.0) Go to error processing
END
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CDCCRAY March, 1985
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Clayton J. Guest TN 84-7104-101-13
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Inlormatics Cereral Corporation
1121 San Antonio Road
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Palo Alto, CA 94303 NAS2-11555
13. Type of pope" aw tins CMnf
Contract Report12. sesonssx'p Ap-y wne ow fir=
National Aeronautics and Space Administration
Washington,	 U.C.	 20546
14 is	 w AV-rCode
999-53-02
is Swootm n afy Now	 Robert A.	 Carlson	 (415)
	
694-6036
Point of Contact: MS:	 233-15	 FTS	 448-6036
Ames Research Center
Moffett Field	 CA 94035
1 {	 Apstnet
CDCCRAY is a Fortran subroutine which runs on the Cray and converts 32 or
64 bit binary data from the CDC Cyber 205 to the corresponding 64 bit binary
data for the Cray X-MP.
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Binary data conversion, unclassified,	 unlimited
software tool, Cray X-MP, Star category -61
CDC Cyber 205
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CDCCRAY

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