Cray Compiler Guide : Fortran Reference Manual

• About the HPE Cray Fortran Reference Manual
  • Release Information
  • Scope and Audience
  • Record of Revision
  • Typographic Conventions
  • About Copy and Paste and Command-line Examples
• Fortran Compiler Introduction
  • The HPE Cray Fortran Programming Environment
  • HPE Cray Fortran Compiler Messages
  • Document-specific Conventions
  • Fortran Standard Compatibility
  • Fortran 2018 Compatibility
  • Fortran Extensions
  • Related Fortran Publications
• Invoke the HPE Cray Fortran Compiler
  • HPE Cray Fortran Command Syntax
  • sourcefile Suffix
  • File Types Used or Created by the Compiler
  • Module information files
• Fortran Command-line Options
• Set Environment Variables to the HPE Cray Fortran Compiler
  • CRAY_FTN_OPTIONS
  • FORTRAN_MODULE_PATH
  • LISTIO_PRECISION
  • NLSPATH
  • NPROC
  • ZERO_WIDTH_PRECISION
  • Run Time Environment Variables
  • aprun Resource Limits
• HPE Cray Fortran Directives
  • HPE Cray Fortran Directive Use
  • Range and Placement of Directives
  • Interaction with the Command Line
  • BLOCKABLE
    • Example 1: BLOCKINGSIZE 1 followed by its equivalent
    • Example 2: BLOCKINGSIZE > 1 at both levels
  • BLOCKINGSIZE, NOBLOCKING
    • Example: Using !DIR$ BLOCKINGSIZE
  • BOUNDS, NOBOUNDS
  • CACHE
  • CACHE_NT
  • CLONE, NOCLONE, RESETCLONE, CLONEALWAYS, CLONENEVER
  • COLLAPSE, NOCOLLAPSE
    • Example 1: COLLAPSE directive
    • Example 2: COLLAPSE directive using array syntax
  • CONCURRENT
  • COPY_ASSUMED_SHAPE
  • FREE, FIXED
  • FUSION, NOFUSION
  • HAND_TUNED
  • HEAP_ALLOCATE, NOHEAP_ALLOCATE
  • IGNORE_TKR
  • INLINE, NOINLINE, RESETINLINE, INLINEALWAYS, INLINENEVER
    • Example: INLINEALWAYS and INLINENEVER directives
  • INTERCHANGE, NOINTERCHANGE
    • Example: INTERCHANGE directive
  • IVDEP
  • LOOP_INFO
  • MEMORY
  • NAME
    • Example: Calling a C routine from a Fortran program
  • NEXTSCALAR
  • NOFISSION
  • NOSIDEEFFECTS
  • OPTIMIZE
  • PATTERN, NOPATTERN
  • PERMUTATION
  • PGAS BUFFERED_ASYNC
  • PGAS DEFER_SYNC
    • Example: Coarray Fortran
  • PIPELINE, NOPIPELINE
  • PREFERVECTOR
  • PREFETCH
    • Example: PREFETCH directive
  • PREPROCESS
  • PROBABILITY, PROBABILITY_ALMOST_ALWAYS, PROBABILITY_ALMOST_NEVER
  • SAFE_ADDRESS
  • SAFE_CONDITIONAL
  • SAME_TBS
  • STACK
  • SUPPRESS
    • Example: SUPPRESS directive
  • UNROLL, NOUNROLL
    • Example 1: Unroll outer loops
    • Example 2: Illegal unrolling of outer loops
    • Example 3: Unroll nearest neighbor pattern
  • VECTOR, NOVECTOR
    • Differences between HPE CCE versions
  • WEAK
• Source Preprocessing
  • General Rules
  • Directives
  • Predefined Macros
  • Command Line Options
• OpenMP Overview
  • Supported Version
  • Compiling
  • Executing
  • Debugging
  • OpenMP Implementation Defined Behavior
  • Atomicity of memory access by multiple threads
  • Internal Control Variables (ICVs)
  • Dynamic Adjustment of Threads
  • Directives and Clauses
  • Library Routines
  • Runtime Library Definitions
  • Environment Variables
  • HPE-specific OpenMP API
  • cray_omp_set_wait_policy
  • CRAY_OMP_CHECK_AFFINITY
  • omp_lib
  • omp_get_wtime omp_get_wtick
  • Optimizations
• OpenACC Use
  • OpenACC Execution Model
  • OpenACC Memory Model
  • Map the OpenACC Programming Model onto Accelerator Components
  • Stream Multiprocessors (SM) and Scalar Processor (SP) cores
  • Memory
  • Mixed Model Support
  • Compile with OpenACC
  • Module Support
  • Debug
  • OpenACC Directives
  • Runtime Routines
  • Extended OpenACC Run Time Library Routines
  • Environment Variables
  • OpenACC Examples
• Conformance Checks
• HPE Cray Fortran Language Extensions
  • 128-Bit Precision
  • Characters, Lexical Tokens, and Source Form
    • Characters Allowed in Names
    • Switch Source Forms
    • Continuation Line Limit
    • Statement and Line length
    • D Lines in Fixed Source Form
  • Types
    • Alternate Form of LOGICAL Constants
    • Cray Pointer Type
    • Cray Character Pointer Type
    • Boolean Type
    • Alternate Form of ENUM Statement
    • TYPEALIAS Statement
  • Data Object Declarations and Specifications
    • BOZ Constraints in DATA Statements
    • AUTOMATIC Attribute and Statement
    • IMPLICIT Statement
    • Storage Association of Data Objects
    • COMMON Statement Extensions
  • Expressions and Assignment
    • Expressions
    • Rules for Forming Expressions
    • Intrinsic and Defined Operations
    • Intrinsic Operations
    • Bitwise Logical Expressions
    • Assignment
    • Array Reference
  • Input/Output Statements
    • File Connection
  • Error, End-of-record, and End-of-file Conditions
    • End-of-file Condition and the END-specifier
  • Input/Output Editing
    • Data Edit Descriptors
      • Default Fractional and Exponent Digits
    • Q Control Edit Descriptor
    • List-directed Formatting
    • Namelist Formatting Extensions
    • I/O Editing
      • Summary of Control Edit Descriptors
      • Summary of Data Edit Descriptors
      • Default Compatibility Between I/O List Data Types and Data Edit Descriptors
      • RELAXED Compatibility Between Data Types and Data Edit Descriptors
      • STRICT77 Compatibility Between Data Types and Data Edit Descriptors
      • STRICT90 or STRICT95 Compatibility Between Data Types and Data Edit Descriptors
  • Program Units
    • Main Program
    • Block Data Program Units
  • Procedures
    • Procedure Interface
    • Procedure Definition
  • Intrinsic Procedures and Modules
    • Intrinsic Procedures
  • Exceptions and IEEE Arithmetic
    • The Exceptions
  • Compile and Execute Programs Containing Coarrays
    • ftn and aprun Options Affecting Coarrays
    • Interoperate with Other Message Passing and Data Passing Models
    • Optimize Programs with Coarrays
• HPE Cray Fortran Deferred Implementation and Optional Features
  • ISO_10646 Character Set
  • Restrictions on Unlimited Polymorphic Variables
• HPE Cray Fortran Implementation Specifics
  • Companion Processor
  • INCLUDE Line
  • INTEGER Kinds and Values
  • REAL Kinds and Values
  • DOUBLE PRECISION Kinds and Values
  • LOGICAL Kinds and Values
  • CHARACTER Kinds and Values
  • Cray Pointers
  • ENUM Kind
  • Storage Issues
  • Storage Units and Sequences
  • Static and Stack Storage
  • Dynamic Memory Allocation
  • Finalization
  • ALLOCATE Error Status
  • DEALLOCATE Error Status
  • ALLOCATABLE Module Variable Status
  • Kind of a Logical Expression
  • STOP Code Availability
  • Stream File Record Structure Position
  • File Unit Numbers
  • OPEN Specifiers
  • FLUSH Statement
  • Asynchronous I/O
  • REAL I/O of an IEEE NaN
  • Input of an IEEE NaN
  • Output of an IEEE NaN
  • List-directed and NAMELIST Output Default Formats
  • Random Number Generator
  • Timing Intrinsics
  • IEEE Intrinsic Modules
• Enhanced I/O: Using the assign Environment
  • Understand the assign Environment
    • Assign Objects and Open Processing
    • assign Command Syntax
    • Use the Library Routines
  • Tune File Connection Behavior
    • Use Alternative File Names
    • Specify File Structure
    • Unblocked File Structure
    • assign -s sbin File Processing
    • assign -s bin File Processing
    • assign -s u File Processing
    • text File Structure
    • cos or blocked File Structure
    • Specify Buffer Behavior
    • Specify Foreign File Formats
    • Default Buffer Sizes
    • Library Buffering
    • System Cache
    • Unbuffered I/O
    • Specify Foreign File Formats
    • Specify Memory Resident Files
    • Use and Suppress File Truncation
  • Define the Assign Environment File
  • Use Local Assign Mode
• Interlanguage Communication
  • Fortran, C, C++ Interoperability
  • BIND(C) Syntax
  • ISO_C_BINDING
  • Interlanguage Communication Examples
  • Interlanguage Communication using Common Block/Global
  • Interlanguage Communication using Derived Structure
  • Interlanguage Communication using Module