XL Fortran Enterprise Edition for AIX : User's Guide - IBM

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If you do not specify -qtune, its setting is determined by the setting of the -qarch option, as follows: -qarch Setting Allowed -qtune Settings Default -qtune Setting com (if you specify -q32) com (if you specify -q64) pwr, pwr2/pwrx, pwr3, pwr4, pwr2s, p2sc, rs64a, rs64b, rs64c, 601, 603, 604, auto See the list of acceptable -qtune settings under the -qarch=ppc64 entry. pwr pwr, pwr2/pwrx, pwr2s, p2sc, 601, auto pwr2 pwr2 (if you specify -q32) pwr3 (if you specify -q64) pwr2/pwrx pwr2/pwrx, p2sc, pwr2s pwr2/pwrx pwr2s pwr2s, auto pwr2s p2sc p2sc, auto p2sc 601 601, auto 601 603 603, auto 603 604 604, auto 604 ppc (if you specify -q32) ppc (if you specify -q64) ppcgr (if you specify -q32) ppcgr (if you specify -q64) ppc64 ppc64gr ppc64grsq 601, 603, 604, rs64a, rs64b, rs64c, pwr3, pwr4, pwr5, ppc970, auto See the list of acceptable -qtune settings under the -qarch=ppc64 entry. 603, 604, rs64b, rs64c, pwr3, pwr4, pwr5, ppc970, auto See the list of acceptable -qtune settings under the -qarch=ppc64gr entry. rs64a, rs64b, rs64c, pwr3, pwr4, pwr5, ppc970, auto rs64b, rs64c, pwr3, pwr4, pwr5, ppc970, auto rs64b, rs64c, pwr3, pwr4, pwr5, ppc970, auto pwr3 (if you specify -q32) pwr3 (if you specify -q64) pwr3 (if you specify -q32) pwr3 (if you specify -q64) pwr3 pwr3 pwr3 rs64a rs64a, auto rs64a rs64b rs64b, auto rs64b rs64c rs64c, auto rs64c pwr3 pwr3, pwr4, pwr5, ppc970, auto pwr3 pwr4 pwr4, pwr5, ppc970, auto pwr4 pwr5 pwr5, auto pwr5 ppc970 ppc970, auto ppc970 Note that you can specify any -qtune suboption with -qarch=auto as long as you are compiling on a machine that is compatible with the -qtune suboption. For example, if you specify -qarch=auto and -qtune=pwr5, you must compile on a POWER3, POWER4, or POWER5 machine. Restrictions Because reducing quad-word instructions may degrade performance on other POWER2 models, we do not recommend the pwr2s suboption for programs that will be run on a number of different POWER2 models. If the program will be run on a set of different POWER2 models, leave the -qtune setting as pwr2. 252 XL Fortran Enterprise Edition for AIX : User’s Guide
Related Information See “-qarch Option” on page 127, “-qcache Option” on page 137, and “Compiling for Specific Architectures” on page 39. XL Fortran Compiler-Option Reference 253
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XL Fortran Enterprise Edition for A
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Note! Before using this information
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Options That Control Listings and M
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How XLF I/O Interacts with Pipes, S
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viii XL Fortran Enterprise Edition
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x XL Fortran Enterprise Edition for
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The following performance-related d
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How to Read the Syntax Diagrams and
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v Optionally, enter the value of at
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6 XL Fortran Enterprise Edition for
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Migration Support The XL Fortran co
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These items are located, or accesse
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v /usr/share/man/info/en_US/xlf/pos
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Notes: 1. Specifying the LC_ALL env
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3. Installing a compiler program te
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fsuffix cppsuffix osuffix ssuffix l
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mcrt = /lib/mcrt0_r.o gcrt = /lib/g
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options include -L/usr/lpp/xlf/lib,
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Related Information: You can use th
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Table 1. Potential Problems Migrati
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Table 1. Potential Problems Migrati
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►► xlf90 xlf90_r xlf90_r7 xlf95
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xlf90, xlf90_r, and xlf90_r7 comman
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Related Information: The ssuffix at
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Related Information: See “-qpdf O
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The @PROCESS compiler directive mus
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Passing Fortran Files through the C
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the trigraph sequence. XL Fortran u
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The configuration file /etc/xlf.cfg
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esulting program work as you expect
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v v Do not use names that are the s
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v v Build the application by using
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If you have applications in which F
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total_usertime Returns the total us
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To obtain support for items that ar
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Note: You may need the old setting
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These partitions are then assigned
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During the busy-wait search for wor
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(for example, loops for which you s
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Other Environment Variables That Af
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Options That Control Input to the C
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Table 3. Options That Control Input
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Table 5. Options for Performance Op
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Table 5. Options for Performance Op
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Table 6. Options for Debugging and
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Table 7. Options That Control Listi
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Table 8. Options for Compatibility
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v v Determine names and options for
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Detailed Descriptions of the XL For
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-1 Option Syntax -1 ONETRIP | NOONE
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-b64 Option Syntax -b64 The AIX ope
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Examples xlf95 f.f -brtl -bshared -
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-bloadmap Option Syntax -bloadmap:n
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-brtl Option Syntax -brtl | -bnortl
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-bstatic Option Related Information
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-c Option Syntax -c Prevents the co
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-d Option Syntax -d Causes preproce
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-g Option Syntax -g DBG | NODBG Gen
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-k Option Syntax -k FREE(F90) Speci
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-l Option Syntax -lkey Searches the
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-O Option Syntax -O[level] OPTimize
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-o Option Syntax -o name Specifies
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-p Option Syntax -p[g] Sets up the
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-q32 Option Related Information See
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-qalias Option Syntax -qalias={[no]
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equivalence (a, b(3)) t = b; a = t
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a derived type are stored with suff
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pwr2s p2sc You can run the executab
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v v If your primary concern is exec
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-qassert Option Syntax -qassert={de
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-qautodbl Option Syntax -qautodbl=s
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Related Information For background
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2 Level-2 cache or the table lookas
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-qcheck Option Syntax -qcheck | -qn
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-qcompact Option Syntax -qcompact |
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-qctyplss Option Syntax -qctyplss[(
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-qdbg Option Syntax -qdbg | -qnodbg
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-qdirective Option Syntax -qdirecti
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-qdirectstorage Option Syntax -qdir
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-qdpc Option Syntax -qdpc[=e] | -qn
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-qescape Option Syntax -qescape | -
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-qextchk Option Syntax -qextchk | -
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-qextname Option Syntax -qextname[=
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-qfdpr Option Syntax -qfdpr | -qnof
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-qflag Option Syntax -qflag=listing
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the reciprocal of the divisor. It a
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export SQRT_EXCEPTION=3.1 166 XL Fo
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-qfree Option Syntax -qfree[={f90|i
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-qhalt Option Syntax -qhalt=severit
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If you specify -qhot=novector, the
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-qhssngl Option Syntax -qhssngl | -
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-qinit Option Syntax -qinit=f90ptr
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v You can specify alphabetic digits
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-qintsize Option Syntax -qintsize=b
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-qipa Option Syntax -qipa[=suboptio
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If you specify short, the Object Fi
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Table 15. Regular expression syntax
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-qkeepparm Option Syntax -qkeepparm
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Restrictions The -qflag option can
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-qlibansi Option Related Informatio
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-qlibposix Option Related Informati
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-qlistopt Option Syntax -qlistopt |
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-qlog4 Option Syntax -qlog4 | -qnol
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Restrictions Depending on the sourc
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Page 218 and 219: -qmodule Option Syntax -qmodule=man
Page 220 and 221: -qnullterm Option Syntax -qnullterm
Page 222 and 223: -qonetrip Option Syntax -qonetrip |
Page 224 and 225: -qpdf Option Syntax -qpdf{1|2} Tune
Page 226 and 227: mergepdf Generates a single pdf rec
Page 228 and 229: -qphsinfo Option Syntax -qphsinfo |
Page 230 and 231: -qpic Option Syntax -qpic[=suboptio
Page 232 and 233: sce | nosce } else if (a == 3) *res
Page 234 and 235: -qprefetch Option Syntax -qprefetch
Page 236 and 237: -qrealsize Option Syntax -qrealsize
Page 238 and 239: -qrecur Option Syntax -qrecur | -qn
Page 240 and 241: To produce a listing file that you
Page 242 and 243: -qsave Option Syntax -qsave[={all|d
Page 244 and 245: -qsclk Option Syntax -qsclk[=centi
Page 246 and 247: -qsigtrap Option Syntax -qsigtrap[=
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Page 250 and 251: threshold=n The work in a partition
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Page 254 and 255: -qspillsize Option Syntax -qspillsi
Page 256 and 257: -qstrictieeemod Option Syntax -qstr
Page 258 and 259: -qsuffix Option Syntax -qsuffix=opt
Page 260 and 261: Examples @process nullterm i = 1; j
Page 262 and 263: Related Information See the OpenMP
Page 264 and 265: -qthreaded Option Syntax -qthreaded
Page 268 and 269: -qundef Option Syntax -qundef | -qn
Page 270 and 271: -qunwind Option Syntax -qunwind |-q
Page 272 and 273: -qwarn64 Option See “-qwarn64 Opt
Page 274 and 275: -qxflag=xalias Option Syntax -qxfla
Page 276 and 277: intxor | nointxor Treats .XOR. as a
Page 278 and 279: Examples Consider the following pro
Page 280 and 281: In this example, conditional compil
Page 282 and 283: -qzerosize Option Syntax -qzerosize
Page 284 and 285: -t Option Syntax -tcomponents Appli
Page 286 and 287: -u Option Syntax -u UNDEF | NOUNDEF
Page 288 and 289: -V Option Syntax -V This option is
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Page 294 and 295: 64-Bit Thread Support On AIX Versio
Page 296 and 297: -q64 Option Syntax -q64[=largetype]
Page 298 and 299: -qwarn64 Option Syntax -qwarn64 | -
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Page 302 and 303: v v If the data or program code con
Page 304 and 305: v Comparisons involving NaN values
Page 306 and 307: How XL Fortran Rounds Floating-Poin
Page 308 and 309: 2. For thread-safety and reentrancy
Page 310 and 311: v The fltint suboption speeds up fl
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call fpgets(fpstat) fpstat(fpox) =
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The following example shows the dif
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v Code that might cause an exceptio
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Optimization levels Option -qnoopt/
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v -qcache=auto Optimization level -
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v v v Reducing the costs of memory
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Loop unrolling also increases code
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2. Run the application using a typi
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# Let the compiler decide (relative
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can also use the SNAPSHOT directive
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-qipa=list cross-file type checking
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324 XL Fortran Enterprise Edition f
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Stream-access formatted files: A re
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I/O Redirection The important thing
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Default Record Lengths File Permiss
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XLFRTEOPTS="unit_vars=yes" # Allow
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Logical Volume I/O To use a logical
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READ(unit_number,ID=idvar) a .... W
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450 end do close(20) end Performanc
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Table 22. Table for Binding an Appl
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v The result of an application does
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Sometimes an application can guaran
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v v The XL compilers generate code
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#include template class junk { pri
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Notes: 1. In interlanguage communic
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Table 25. Escape Sequences for Char
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You can use this built-in function
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The system linkage convention passe
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Run-time Stack for 32-bit Environme
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processing, and the fifth doublewor
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v v v v v v v In a 32-bit Environme
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Will Be Passed In: R3 0 Storage Map
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Function Values Functions return th
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Example The control structure has t
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technique can reduce the amount of
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Note: When you run an XL Fortran pr
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Duplicating Extensions from Other S
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Input/Output Errors If the error de
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-> xlf95 -qddim -g testprog.f -o te
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7. The next step is to research why
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Note that you cannot use the -qextn
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v v Memory leak reporting that indi
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HD_FILL HD_STACK=n called a certain
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Source Section The source section c
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Attribute and Cross-Reference Secti
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Automating Large, Complex Compilati
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For fixed source form code, in addi
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Common Industry Extensions That XL
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Example 2 - Valid C Routine Source
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close(10) open(10, file="fun10.out"
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!**********************************
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operating system require the same o
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Examples of Storage Relationships f
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0 4 8 16 32 64 COMPLEX (16) COMPLEX
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! Data values between r8 and x16 ar
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end function sqrt real*8 function r
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Table 34. MASS Vector Library Funct
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IBM may use or distribute any of th
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ind. To relate an identifier to ano
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expression. A sequence of operands,
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name. A lexical token consisting of
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labels can be used to transfer cont
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.profile file 12 .s files 33, 34 .X
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fdate_ service and utility subprogr
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nonested_par suboption of -qsmp 234
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vi text editor 29 W W error severit
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XL Fortran Enterprise Edition for AIX : User's Guide - IBM

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