3.4 Options Reference
-xtarget= |
-xarch |
-xchip |
-xcache |
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pentium_pro (Obsolete) |
generic |
generic |
generic |
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pentium3 (Obsolete) |
generic |
generic |
generic |
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pentium4 |
sse2 |
pentium4 |
8/64/4:256/128/8 |
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opteron |
sse2a |
opteron |
64/64/2:1024/64/16 |
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woodcrest |
ssse3 |
core2 |
32/64/8:4096/64/16 |
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barcelona (Obsolete) |
amdsse4a |
amdfam10 |
64/64/2:512/64/16 |
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penryn |
sse4_1 |
penryn |
2/64/8:6144/64/24 |
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nehalem |
sse4_2 |
nehalem |
32/64/8:256/64/8: |
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8192/64/16 |
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westmere |
aes |
westmere |
32/64/8:256/64/8:30720/64/24 |
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sandybridge |
avx |
sandybridge |
32/64/8/2:256/64/8/2: |
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20480/64/20/16 |
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ivybridge |
avx_i |
ivybridge |
32/64/8/2:256/64/8/2: |
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20480/64/20/16 |
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haswell |
avx2 |
haswell |
32/64/8/2:256/64/8/2: |
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20480/64/20/16 |
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broadwell |
avx2_i |
broadwell |
32/64/8/2:256/64/8/2: |
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20480/64/20/16 |
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skylake |
avx512 |
skylake |
32/64/8:256/64/8:20480/64/20 |
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Compiling for 64-bit Oracle Solaris OS on 64-bit enabled x86 platform is indicated by the - m64 flag. For example, compiling with -xtarget=opteron is not necessary or sufficient. If - xtarget is specified, the -m64 option must appear after the -xtarget flag, as in:
-xtarget=opteron -m64
otherwise the compilation will be 32-bit x86.
3.4.183 -xtemp=path
Equivalent to -temppath.
3.4.184 -xthroughput[={yes|no}]
The -xthroughput option tells the compiler that the application will be run in situations where many processes are simultaneously running on the system
162 Oracle Developer Studio 12.6: Fortran User's Guide • July 2017
3.4 Options Reference
If -xthroughput=yes, the compiler will favor optimizations that slightly reduce performance for a single process while improving the amount of work achieved by all the processes on the system. As an example, the compiler might choose to be less aggressive in prefetching data.
Such a choice would reduce the memory bandwidth consumed by the process, and as such the process may run slower, but it would also leave more memory bandwidth to be shared among other processes.
The default is -xthroughput=no.
3.4.185 –xtime
Synonym for -time.
3.4.186 –xtypemap=spec
Specify default data mappings.
This option provides a flexible way to specify the byte sizes for default data types. This option applies to both default-size variables and constants.
The specification string spec may contain any or all of the following in a comma-delimited list:
real:size,double:size,integer:size
The allowable combinations on each platform are:
■real:32
■real:64
■double:64
■double:128
■integer:16
■integer:32
■integer:64
For example:
■–xtypemap=real:64,double:64,integer:64
Chapter 3 • Fortran Compiler Options |
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3.4 Options Reference
maps both default REAL and DOUBLE to 8 bytes.
This option applies to all variables declared with default specifications (without explicit byte sizes), as in REAL XYZ (resulting in a 64-bit XYZ). Also, all single-precision REAL constants are promoted to REAL*8.
Note that INTEGER and LOGICAL are treated the same, and COMPLEX is mapped as two REALs. Also, DOUBLE COMPLEX will be treated the way DOUBLE is mapped.
3.4.187 -xunboundsym={yes|no}
Specify whether the program contains references to dynamically bound symbols.
-xunboundsym=yes means the program contains references dynamically bound symbols.
-xunboundsym=no means the program does not contain references to dynamically bound symbols.
The default is -xunboundsym=no.
3.4.188 –xunroll=n
Synonym for -unroll=n.
3.4.189 -xvector[=a]
Enables automatic generation of calls to the vector library functions or the generation of the SIMD (Single Instruction Multiple Data) instructions on processors that support SIMD. You must use default rounding mode by specifying -fround=nearest when you use this option.
The -xvector option requires optimization level -xO3 or greater. The option is silently ignored if the optimization level is lower than -xO3.
The possible values for a are listed in the following table. The no% prefix disables the associated sub-option.
164 Oracle Developer Studio 12.6: Fortran User's Guide • July 2017
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3.4 Options Reference |
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TABLE 26 |
-xvector Sub-options |
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Value |
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Meaning |
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[no%]lib |
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(Oracle Solaris) Enables the compiler to transform math library calls within loops |
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into single calls to the equivalent vector math routines when such transformations are |
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possible. This could result in a performance improvement for loops with large loop |
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counts. Use no%lib to disable this option. |
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[no%]simd |
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(SPARC) For -xarch=sparcace, -xarch=sparcaceplus and -xarch=sparcace2, |
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directs the compiler to use floating point and integral SIMD instructions to improve |
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the performance of certain loops. Contrary to that of the other SPARC -xarch |
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values under -xarch=sparcace, -xarch=sparcaceplus and -xarch=sparcace2, |
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-xvector=simd is in effect unless -xvector=none or -xvector=no%simd has been |
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specified. In addition -xO4 or greater is required for -xvector=simd, otherwise |
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-xvector=simd is ignored. |
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For all other -xarch values, directs the compiler to use the Visual Instruction |
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Set [VIS1, VIS2, ViS3, etc.] SIMD instructions to improve the performance of |
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certain loops. Basically with explicit -xvector=simd option, the compiler will |
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perform loop transformation enabling the generation of special vectorized SIMD |
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instructions to reduce the number of loop iterations. In addition to the optimization |
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level requirement noted below, the -xvector=simd option is effective only if - |
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xarch=sparcvis3 and above. |
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[no%]simd |
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(x86) Directs the compiler to use the native x86 SSE SIMD instructions to improve |
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performance of certain loops. Streaming extensions are used on x86 by default at |
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optimization level 3 and above where beneficial. Use no%simd to disable this option.. |
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The compiler will use SIMD only if streaming extensions exist in the target |
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architecture; that is, if target ISA is at least SSE2. For example, you can specify - |
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xtarget=woodcrest, —xarch=generic, -xarch=sse2, -xarch=sse3, or -fast on |
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a modern platform to use it. If the target ISA has no streaming extensions, the sub- |
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option will have no effect. |
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%none |
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Disable this option completely. |
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yes |
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This option is deprecated; specify -xvector=lib instead. |
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no |
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This option is deprecated; specify -xvector=%none instead. |
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On x86, the default is -xvector=simd. On SPARC, the default is -xvector=simd under
-xarch=sparcace, -xarch=sparcaceplus and -xarch=sparcace2, and -xvector=%none on other SPARC -xarch values. If you specify -xvector without a sub-option, the compiler assumes -xvector=simd,lib on Oracle Solaris x86, -xvector=lib on Oracle Solaris SPARC, and - xvector=simd on Oracle Linux platforms.
The compiler includes the libmvec libraries in the load step.
If you compile and link with separate commands, be sure to use -xvector in the linking CC command as well.
Chapter 3 • Fortran Compiler Options |
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