Intel(R) Fortran Compiler for Linux* Systems User's Guide Volume I ...

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Intel® Fortran Compiler for Linux* Systems User's Guide Volume I: Building Applications Data Representation Data Representation Overview See these topics: Intrinsic Data Types Integer Data Representations Overview Logical Data Representations Native IEEE Floating-Point Representations Overview Character Representation Hollerith Representation Intrinsic Data Types Intel® Fortran expects numeric data to be in native little endian order, in which the least-significant, right-most zero bit (bit 0) or byte has a lower address than the most-significant, left-most bit (or byte). For information on using nonnative big endian and VAX* floating-point formats, see Converting Unformatted Numeric Data. The symbol :A in any figure specifies the address of the byte containing bit 0, which is the starting address of the represented data element. The following table lists the intrinsic data types used by Intel Fortran, the storage required, and valid ranges. For example, the declaration INTEGER(4) is the same as INTEGER(KIND=4) and INTEGER*4. Data Type Storage Description BYTE INTEGER(1) INTEGER INTEGER(1) 1 byte (8 bits) See INTEGER(2), INTEGER(4), and INTEGER(8). 1 byte (8 bits) A BYTE declaration is a signed integer data type equivalent to INTEGER(1). Signed integer, either INTEGER(2), INTEGER(4), or INTEGER(8). The size is controlled by the -integer_size nn compiler option. The default is -integer_size 32 (INTEGER(4)). Signed integer value from -128 to 127. 108
Intel® Fortran Compiler for Linux* Systems User's Guide, Volume I: Building Applications INTEGER(2) INTEGER(4) INTEGER(8) REAL(4) REAL REAL(8) DOUBLE PRECISION REAL(16) EXTENDED PRECISION COMPLEX(4) COMPLEX COMPLEX(8) DOUBLE COMPLEX COMPLEX(16) EXTENDED PRECISION LOGICAL LOGICAL(1) LOGICAL(2) LOGICAL(4) 2 bytes (16 bits) 4 bytes (32 bits) 8 bytes (64 bits) 4 bytes (32 bits) 8 bytes (64 bits) 16 bytes (128 bits) 8 bytes (64 bits) 16 bytes (128 bits) 32 bytes (256 bits) See LOGICAL(2), LOGICAL(4), and LOGICAL(8). 1 byte (8 bits) 2 bytes (16 bits) 4 bytes (32 bits) Signed integer value from -32,768 to 32,767. Signed integer value from -2,147,483,648 to 2,147,483,647. Signed integer value from -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807. Single-precision real floating-point values in IEEE S_floating format ranging from 1.17549435E-38 to 3.40282347E38. Values between 1.17549429E-38 and 1.40129846E-45 are denormalized (subnormal). Double-precision real floating-point values in IEEE T_floating format ranging from 2.2250738585072013D-308 to 1.7976931348623158D308. Values between 2.2250738585072008D-308 and 4.94065645841246544D- 324 are denormalized (subnormal). Extended-precision real floating-point values in IEEE-style X_floating format ranging from 6.4751751194380251109244389582276465524996Q-4966 to 1.189731495357231765085759326628007016196477Q4932. Single-precision complex floating-point values in a pair of IEEE S_floating format parts: real and imaginary. The real and imaginary parts each range from 1.17549435E-38 to 3.40282347E38. Values between 1.17549429E-38 and 1.40129846E-45 are denormalized (subnormal). Double-precision complex floating-point values in a pair of IEEE T_floating format parts: real and imaginary. The real and imaginary parts each range from 2.2250738585072013D- 308 to 1.7976931348623158D308. Values between 2.2250738585072008D-308 and 4.94065645841246544D- 324 are denormalized (subnormal). Extended-precision complex floating-point values in a pair of IEEE-style X_floating format parts: real and imaginary. The real and imaginary parts each range from 6.4751751194380251109244389582276465524996Q-4966 to 1.189731495357231765085759326628007016196477Q4932. Logical value, either LOGICAL(2), LOGICAL(4), or LOGICAL(8). The size is controlled by the -integer_size nn compiler option. The default is -integer_size 32 (LOGICAL(4)). Logical values .TRUE. or .FALSE. Logical values .TRUE. or .FALSE. Logical values .TRUE. or .FALSE. 109
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Intel(R) Fortran Compiler for Linux
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Table Of Contents Table Of Contents
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Table Of Contents Predefined Prepro
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Table Of Contents -e90 or -e95 ....
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Table Of Contents -[no]fpconstant .
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Table Of Contents -noinclude ......
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Table Of Contents -par_threshold n.
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Table Of Contents Using Debugger Co
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Table Of Contents Limitations of Nu
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Table Of Contents Specifiers for Fi
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Table Of Contents Programming with
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Table Of Contents Run-Time Message
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About the Intel® Fortran Compiler
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Intel® Fortran Compiler for Linux*
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Index ! !DEC$ prefix ..............
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Index -assume dummy_aliases compile
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Index common blocks allocating ....
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Index compiler option -convert meth
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Index additional...................
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Index file information OPEN stateme
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Index FOR$IOS_FLTOVF error message
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Index FOR$IOS_TOOMANREC error messa
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Index -fvisibility-keyword compiler
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Index -ip_no_pinlining compiler opt
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Index manuals additional...........
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Index -nus compiler option.........
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Index -pad_source compiler option..
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Index record characteristics OPEN s
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Index signal routine calling ......
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Index uninstall.sh file ...........
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