NESC0881 ELEFUNT.
ELEFUNT, Testing of Elementary Function Subroutines
NAME OR DESIGNATION OF PROGRAM, COMPUTER, DESCRIPTION OF PROBLEM OR FUNCTION, METHOD OF SOLUTION, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES OF THE PROGRAM, RELATED AND AUXILIARY PROGRAMS, STATUS, REFERENCES, MACHINE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM UNDER WHICH PROGRAM IS EXECUTED, OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHOR, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| ELEFUNT | NESC0881/01 | Tested | 16-JUL-1981 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NESC0881/01 | IBM 3033 |
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3. DESCRIPTION OF PROBLEM OR FUNCTION
ELEFUNT is a FORTRAN test package for the elementary functions. Each program is an aggressive test of one or more of the elementary function subroutines generally supplied with the support library accompanying a FORTRAN compiler.
Functions tested are ALOG/ALOG10, ASIN/ACOS, ATAN, EXP, POWER, SIN/ COS, SINH/COSH, SQRT, TAN/COTAN, and TANH.
ELEFUNT is a FORTRAN test package for the elementary functions. Each program is an aggressive test of one or more of the elementary function subroutines generally supplied with the support library accompanying a FORTRAN compiler.
Functions tested are ALOG/ALOG10, ASIN/ACOS, ATAN, EXP, POWER, SIN/ COS, SINH/COSH, SQRT, TAN/COTAN, and TANH.
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5. RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM
The package contains one subroutine (MACHAR) for dynamic determination of parameters describing the floating-point arithmetic system of the host machine, the test programs must be modified to insert the necessary machine- dependent parameters in DATA statements, or otherwise make them available. This computing environment inquiry routine is known to malfunction when the arithmetic registers are wider than the storage registers.
The package contains one subroutine (MACHAR) for dynamic determination of parameters describing the floating-point arithmetic system of the host machine, the test programs must be modified to insert the necessary machine- dependent parameters in DATA statements, or otherwise make them available. This computing environment inquiry routine is known to malfunction when the arithmetic registers are wider than the storage registers.
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6. TYPICAL RUNNING TIME
Running time is generally short and varies with the host machine and the function being tested. NESC executed all of the drivers in 5 seconds of CPU time on an IBM3033, 17 seconds of CP time on a CDC6600, 2 seconds of CP time on a CDC7600, and 20 seconds of CP time on a UNIVAC1100/44.
Running time is generally short and varies with the host machine and the function being tested. NESC executed all of the drivers in 5 seconds of CPU time on an IBM3033, 17 seconds of CP time on a CDC6600, 2 seconds of CP time on a CDC7600, and 20 seconds of CP time on a UNIVAC1100/44.
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7. UNUSUAL FEATURES OF THE PROGRAM
At this time there are no other diagnostic/test packages available for the elementary functions. The package is aggressive in detecting specific problems in the functions being tested, is highly portable, and contains a unique computing environment inquiry package.
At this time there are no other diagnostic/test packages available for the elementary functions. The package is aggressive in detecting specific problems in the functions being tested, is highly portable, and contains a unique computing environment inquiry package.
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10. REFERENCES
- William j. Cody, Jr. and William M. Waite,
Software Manual for the Elementary Functions, Prentice Hall Inc.,
Englewood Cliffs, New Jersey, 1980.
- William j. Cody, Jr. and William M. Waite,
Software Manual for the Elementary Functions, Prentice Hall Inc.,
Englewood Cliffs, New Jersey, 1980.
NESC0881/01, included references:
- NESC Note 80-65 (April 14, 1980)- NESC Note 80-66 (April 14, 1980)
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14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
Test
output produced by other host machines may differ from the test output supplied on microfiche by NESC for the CDC, IBM and UNIVAC.
Elements of the package have been tested successfully by the author on the following additional machines: BESM-6, Burroughs6700, CRAY-1, PDP10, PDP11, Varian V76, and Z80 (using Microsoft FORTRAN). Modifications are required to execute the package on Honeywell equipment. On the CDC6000/7000 series hardware the PROGRAM card must be inserted at the beginning of each driver.
Because the 1966 FORTRAN standard did not specify some of the functions usually found in a support library, and the ANSI X3.9-1978 standard fails to mention a COTANgent program, some libraries may not have all of the functions being tested or may use names other than those used in this package. Drivers for the ASIN/ACOS and TAN/COTAN tests may have to be modified for this reason. All drivers may also require modification if the MACHAR subprogram malfunctions or if a local random number generator is to be used. MACHAR deliberately causes two floating-point underflows; it is assumed that program execution will continue each time.
Test
output produced by other host machines may differ from the test output supplied on microfiche by NESC for the CDC, IBM and UNIVAC.
Elements of the package have been tested successfully by the author on the following additional machines: BESM-6, Burroughs6700, CRAY-1, PDP10, PDP11, Varian V76, and Z80 (using Microsoft FORTRAN). Modifications are required to execute the package on Honeywell equipment. On the CDC6000/7000 series hardware the PROGRAM card must be inserted at the beginning of each driver.
Because the 1966 FORTRAN standard did not specify some of the functions usually found in a support library, and the ANSI X3.9-1978 standard fails to mention a COTANgent program, some libraries may not have all of the functions being tested or may use names other than those used in this package. Drivers for the ASIN/ACOS and TAN/COTAN tests may have to be modified for this reason. All drivers may also require modification if the MACHAR subprogram malfunctions or if a local random number generator is to be used. MACHAR deliberately causes two floating-point underflows; it is assumed that program execution will continue each time.
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NESC0881/01
| File name | File description | Records |
|---|---|---|
| NESC0881_01.001 | DRIVER FOR ALOG/ALOG10 | 223 |
| NESC0881_01.002 | DRIVER FOR ASIN/ACOS | 227 |
| NESC0881_01.003 | DRIVER FOR ATAN | 242 |
| NESC0881_01.004 | DRIVER FOR EXP | 199 |
| NESC0881_01.005 | DRIVER FOR POWER | 241 |
| NESC0881_01.006 | DRIVER FOR SIN/COS | 222 |
| NESC0881_01.007 | DRIVER FOR SINH/COSH | 244 |
| NESC0881_01.008 | DRIVER FOR SQRT | 170 |
| NESC0881_01.009 | DRIVER FOR TAN/COTAN | 208 |
| NESC0881_01.010 | DRIVER FOR TANH | 189 |
| NESC0881_01.011 | SUBROUTINES MACHAR,RAN AND RANDL | 266 |
| NESC0881_01.012 | OUTPUT OF ALOG/ALOG10 | 174 |
| NESC0881_01.013 | OUTPUT OF ASIN/ACOS | 188 |
| NESC0881_01.014 | OUTPUT OF ATAN | 207 |
| NESC0881_01.015 | OUTPUT OF EXP | 149 |
| NESC0881_01.016 | OUTPUT OF POWER | 201 |
| NESC0881_01.017 | OUTPUT OF SIN/COS | 164 |
| NESC0881_01.018 | OUTPUT OF SINH/COSH | 186 |
| NESC0881_01.019 | OUTPUT OF SQRT | 107 |
| NESC0881_01.020 | OUTPUT OF TAN/COTAN | 179 |
| NESC0881_01.021 | OUTPUT OF TANH | 121 |
Keywords: FORTRAN, elementary functions, libraries, testing.