PGI User's Guide

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$Intel(R) Math Kernel Library for Linux* OS User's Guide$

Intrinsicsvoid example21(){void * stack_pointer = GET_SP2;}The statement expression allows a body of code to evaluate to a single value. This value is specified as the lastinstruction in the statement expression. In this case, the value is the result of the asm statement, my_stack_ptr.By writing an asm macro with a statement expression, the asm result may be assigned directly to anothervariable (for example, void * stack_pointer = GET_SP2) or included in a larger expression, such as: void *stack_pointer = GET_SP2 - sizeof(long).Which style of macro to use depends on the application. If the asm statement needs to be a part of anexpression, then a macro with a statement expression is a good approach. Otherwise, a traditional macro, likeGET_SP(x), will probably suffice.IntrinsicsInline intrinsic functions map to actual x86 or x64 machine instructions. Intrinsics are inserted inline to avoidthe overhead of a function call. The compiler has special knowledge of intrinsics, so with use of intrinsics,better code may be generated as compared to extended inline assembly code.The <strong>PGI</strong> Workstation version 7.0 or higher compiler intrinsics library implements MMX, SSE, SS2, SSE3, SSSE3,SSE4a, and ABM instructions. The intrinsic functions are available to C and C++ programs on Linux andWindows. Unlike most functions which are in libraries, intrinsics are implemented internally by the compiler.A program can call the intrinsic functions from C/C++ source code after including the corresponding headerfile.The intrinsics are divided into header files as follows:Table 14.6. Intrinsic Header File OrganizationInstructionsMMXSSESSE2SSE3SSSE3SSE4aABMHeader Filemmintrin.hxmmintrin.hemmintrin.hpmmintrin.htmmintrin.hammintrin.hintrin.hThe following is a simple example program that calls XMM intrinsics.#include int main(){__m128, __A, __B, result;__A = _mm_set_ps(23.3, 43.7, 234.234, 98.746);__B = _mm_set_ps(15.4, 34.3, 4.1, 8.6);result = _mm_add_ps(__A,__B);return 0;}190
IndexSymbols64-Bit Programming, 167compiler options, 169data types, 167-Bdynamic, 126-dryrunas diagnostic tool, 26-helpOptions-help, 26-Mconcur, 35, 47altcode option, 35cncall option, 36dist option, 36suboptions, 35-Mextractsuboptions, 51-Minfo, 26-Minline, 49suboptions, 49-Miomutex, 60-Mipa, 39-Mneginfo, 26-mp, 47, 60-Mpfi, 44-Mpfo, 44-Mreentrant, 60-Msafe_lastval, 39-Mvect, 30, 32-tp, 39using, 21AAcceleratorusing, 83AgreementsLicense, 12Aliasesoperand, 187AMDCore Math Library, 11ar command, 121ArgumentsInter-language calling, 155passing, 155passing by value, 155Arrays64-bit indexing, 16864-bit options, 169indices, 156large, 169Assemblystring modifier characters, 188Auto-parallelization, 35failure, 36sub-options, 35Bbash shellinitialization, 12instance, 12Bdynamic, 123BLAS library, 130Blocksbasic, defined, 24common, Fortran, 154Fortran named common, 154Bstatic, 123BuildDLLS, 125DLLS containing circular mutualimports, 126DLLS containing mutual imports,127DLLs example, 124program using Make, 40program with IPA, 41program without IPA, 40, 40CC/C++builtin functions, 117math header file, 117C$PRAGMA C, 116C++parallelization pragmas, 60pragmas, 60Standard Template Library, 130Calling conventionsCREF, 165overview, 151STDCALL, 164UNIX, 165Win32, 164CCP_HOME, 78CCP_SDK, 78Clausesdirectives, 59driectives, 62pragmas, 62Clobber list, 180Codegeneration, 148mutiple processors, 148optimization, 23parallelization, 23position indendent, 169processor-specific, 148speed, 36x86 generation, 148CollectionIPA phase, 41Command linecase sensitivity, 3conflicting options rules, 18include files, 5option order, 3suboptions, 18Command-line Options, 3, 17help, 18makefiles, 18-mcmodel=medium, 168-mcmodel=small, 168-Mlarge_arrays, 168rules of use, 3191
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While every precaution has been tak
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PGI ® Compiler User’s Guide4. Us
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PGI ® Compiler User’s GuideRefer
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xii14.6. Intrinsic Header File Orga
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xiv13.3. Large Array and Small Memo
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Organizationxvi• Fortran 95 Handb
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Conventionsin this guide with which
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Chapter 1. Getting StartedThis chap
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Chapter 1. Getting StartedWhere:opt
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Chapter 1. Getting Startedfilename.
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Chapter 1. Getting Startedfilename.
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Chapter 1. Getting Startedparallel
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Chapter 1. Getting Startedas execut
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Chapter 1. Getting Startedar or ran
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Chapter 1. Getting StartedTo do thi
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Chapter 2. Using Command LineOption
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Chapter 2. Using Command Line Optio
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Chapter 2. Using Command Line Optio
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Chapter 3. Optimizing & Parallelizi
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Invoking Function Inlining50except:
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Creating an Inline Librarylevel of
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Restrictions on InliningA Fortran s
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OpenMP OverviewFortran directives a
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Task OverviewN = 1000DO I = 1, NV(I
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C/C++ Parallelization PragmasC/C++
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Directive and Pragma ClausesFortran
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Directive and Pragma ClausesThis cl
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Run-time Library RoutinesRun-time L
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Run-time Library RoutinesRun-time L
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Environment VariablesRun-time Libra
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Chapter 6. Using MPIMessage Passing
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Chapter 6. Using MPIyou are using M
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Chapter 6. Using MPIthe root of the
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Chapter 6. Using MPIcorrelated with
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Chapter 6. Using MPI• Add the fol
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TerminologyAvailability84The PGI 11
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System Requirements86Vector operati
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Memory Model88• waits for complet
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Accelerator DirectivesAccelerator D
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Accelerator Directives• Initial d
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Accelerator DirectivesThis directiv
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Accelerator Directive ClausesUse th
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Environment Variables• Interfaces
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PGI Unified Binary for Accelerators
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Profiling Accelerator KernelsWith '
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Supported IntrinsicsTable 7.5. Supp
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References related to AcceleratorsT
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PGI Proprietary C and C++ Pragmas10
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Scope of Fortran Directives and Com
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Scope of C/C++ Pragmas and Command-
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Prefetch Directives and Pragmas114d
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C$PRAGMA CTable 8.2. !DEC$ Directiv
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Using System Library Routines118voi
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Creating and Using Dynamic Librarie
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Creating and Using Dynamic-Link Lib
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Using LIB3FStep 3: Run the exe to e
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Setting Environment VariablesIn bas
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PGI-Related Environment VariablesEn
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PGI Environment VariablesLD_LIBRARY
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PGI Environment VariablesNCPUS138Se
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Page 162 and 163: Using Environment Modules on LinuxT
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Page 166 and 167: Deploying Applications on Linux146T
Page 168 and 169: Code Generation and Processor Archi
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Page 172 and 173: Inter-language Calling Consideratio
Page 174 and 175: Compatible Data TypesNoteFortran Ty
Page 176 and 177: Array Indices! Fortran function ret
Page 178 and 179: ExamplesCompile and execute the pro
Page 180 and 181: Examples160int a,b,c;a=8; b=2;print
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Page 188 and 189: Large Static Data in LinuxC/C++ Dat
Page 190 and 191: Practical Limitations of Large Arra
Page 192 and 193: Medium Memory Model and Large Array
Page 194 and 195: Large Array and Small Memory Model
Page 196 and 197: Extended Inline AssemblyExtended In
Page 198 and 199: Extended Inline Assemblyexample2:..
Page 200 and 201: Extended Inline Assembly180movq %rs
Page 202 and 203: Extended Inline AssemblyConstraintw
Page 204 and 205: Extended Inline AssemblyConstraintu
Page 206 and 207: Extended Inline AssemblyConstraintM
Page 208 and 209: Extended Inline AssemblyModifierDes
Page 212 and 213: suboptions, 18syntax, 2, 17Commands
Page 214 and 215: InstallLinux portability package, 1
Page 216 and 217: modifier *, 186, 186modifier &, 186
Page 218: optimization, 39-tp option, 39UNIXc
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