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

Table 8. Options for Compatibility (continued)
Command-Line Option @PROCESS Directive Description
-qxlf90=
{[no]signedzero |
[no]autodealloc}
XLF90(
{[no]signedzero |
[no]autodealloc})
Determines whether the
compiler provides the
Fortran 90 or the Fortran
95 level of support for
certain aspects of the
language.
Default: The default
suboptions are
signedzero and
autodealloc for the xlf95,
xlf95_r, xlf95_r7, and f95
invocation commands.
For all other invocation
commands, the default
suboptions are
nosignedzero and
noautodealloc.
See
Page
263
Options for Floating-Point Processing
To take maximum advantage of the system floating-point performance and
precision, you may need to specify details of how the compiler and XLF-compiled
programs perform floating-point calculations.
Related Information: See “-qflttrap Option” on page 165 and “Duplicating the
Floating-Point Results of Other Systems” on page 295.
Table 9. Options for Floating-Point Processing
Command-
Line Option
-qfloat=options
-qieee={ Near
| Minus
| Plus
| Zero}
-y{n|m|p|z}
@PROCESS
Directive
Description
FLOAT(options) Determines how the compiler generates or
optimizes code to handle particular types of
floating-point calculations.
Default: Default suboptions are nofltint, fold,
nohsflt, nohssngl, maf, nonans, norndsngl,
norrm, norsqrt, and nostrictnmaf; some of these
settings are different with -O3 optimization
turned on or with -qarch=ppc.
IEEE({Near
| Minus
| Plus
| Zero})
Specifies the rounding mode for the compiler to
use when evaluating constant floating-point
expressions at compile time.
Default: -qieee=near
See
Page
163
175
Options That Control Linking
The following options control the way the ld command processes object files
during compilation. Some of these options are passed on to ld and are not
processed by the compiler at all.
You can actually include ld options on the compiler command line, because the
compiler passes unrecognized options on to the linker.
86 XL Fortran Enterprise Edition for AIX : User’s Guide