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Compiler Command-line Options Restrictions Options from a project template file are only set when they do not conflict with options already set on the command line. If an option from a project template file conflicts with an existing command-line option, the command-line option takes precedence. Example Consider the following project template file: --cpu=ARM926EJ-S --fpu=vfpv2 When the RVDS_PROJECT environment variable is set to point to this file, the command: armcc -c foo.c results in an actual command line of: armcc --cpu=ARM926EJ-S --fpu=VFPv2 -c foo.c See also • --reinitialize_workdir on page 2-110 • --workdir=directory on page 2-136. 2.1.136 --reassociate-saturation This option enables more aggressive optimization when vectorizing loops that use saturating addition, by permitting reassociation of saturation arithmetic. Restriction Saturation addition is not associative, so enabling reassociation could affect the result with a reduction in accuracy. Example The following code does not vectorize unless --reassociate-saturation is specified. 2-108 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler Command-line Options #include int f(short *a, short *b) { int i; int r = 0; for (i = 0; i < 100; i++) r=L_mac(r,a[i],b[i]); return r; } 2.1.137 --reduce_paths, --no_reduce_paths This option enables or disables the elimination of redundant path name information in file paths. When elimination of redundant path name information is enabled, the compiler removes sequences of the form xyz\.. from directory paths passed to the operating system. This includes system paths constructed by the compiler itself, for example, for #include searching. Note The removal of sequences of the form xyz\.. might not be valid if xyz is a link. Mode This option is effective on Windows systems only. Usage Windows systems impose a 260 character limit on file paths. Where path names exist whose absolute names expand to longer than 260 characters, you can use the --reduce_paths option to reduce absolute path name length by matching up directories with corresponding instances of .. and eliminating the directory/.. sequences in pairs. Note It is recommended that you avoid using long and deeply nested file paths, in preference to minimizing path lengths using the --reduce_paths option. Default The default is --no_reduce_paths. ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 2-109 ID101213 Non-Confidential,
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® RealView Compilation Tools Versi
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Product Status The information in t
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Contents RealView Compilation Tools
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Preface This preface introduces the
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Preface Appendix A Via File Syntax
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Preface Other publications The foll
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Chapter 1 Introduction This chapter
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Introduction 1.2 Source language mo
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Introduction 1.3 Language extension
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Introduction • Compiling a C sour
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Chapter 2 Compiler Command-line Opt
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Compiler Command-line Options 2.1.2
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Compiler Command-line Options Each
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Compiler Command-line Options Note
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Compiler Command-line Options • -
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Compiler Command-line Options Restr
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Compiler Command-line Options Defau
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Compiler Command-line Options Examp
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Compiler Command-line Options Synta
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Compiler Command-line Options See a
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Compiler Command-line Options Examp
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Compiler Command-line Options Compi
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Compiler Command-line Options Synta
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Compiler Command-line Options Selec
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Compiler Command-line Options Note
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Compiler Command-line Options • R
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Compiler Command-line Options Defau
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Language Extensions int counter __a
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Language Extensions 3.6.12 Structur
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Language Extensions 3.7 GNU languag
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Language Extensions 3.7.5 Character
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Language Extensions • You can use
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Language Extensions Errors The comp
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Chapter 4 Compiler-specific Feature
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Compiler-specific Features Usage __
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Compiler-specific Features Return v
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Compiler-specific Features Example
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Compiler-specific Features The func
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Compiler-specific Features Note The
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Compiler-specific Features Usage Th
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Compiler-specific Features Syntax _
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Compiler-specific Features See also
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Compiler-specific Features __weak v
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Compiler-specific Features When a c
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Compiler-specific Features Examples
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Compiler-specific Features Usage If
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Compiler-specific Features 4.3 Func
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Compiler-specific Features 4.3.2 __
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Compiler-specific Features Note Thi
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Compiler-specific Features 4.3.11 _
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Compiler-specific Features 4.4 Type
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Compiler-specific Features • Bit-
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Compiler-specific Features 4.5 Vari
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Compiler-specific Features In parti
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Compiler-specific Features 4.5.5 __
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Compiler-specific Features Note You
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Compiler-specific Features Default
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Compiler-specific Features • Chap
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Compiler-specific Features This pra
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Compiler-specific Features Note Bot
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Compiler-specific Features 4.7 Inst
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Compiler-specific Features opcode2
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Compiler-specific Features Syntax v
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Compiler-specific Features Syntax v
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Compiler-specific Features Restrict
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Compiler-specific Features Errors T
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Compiler-specific Features ptr poin
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Compiler-specific Features 4.7.44 A
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Compiler-specific Features Table 4-
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Compiler-specific Features 4.7.47 A
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Compiler-specific Features • __uh
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Compiler-specific Features • Para
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Compiler-specific Features 4.10 GNU
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Chapter 5 C and C++ Implementation
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C and C++ Implementation Details th
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C and C++ Implementation Details Se
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C and C++ Implementation Details Po
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C and C++ Implementation Details
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C and C++ Implementation Details 5.
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C and C++ Implementation Details No
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C and C++ Implementation Details na
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C and C++ Implementation Details 5.
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Appendix A Via File Syntax This app
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Via File Syntax A.2 Syntax Via file
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Appendix B Standard C Implementatio
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Standard C Implementation Definitio
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Appendix C Standard C++ Implementat
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Standard C++ Implementation Definit
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Standard C++ Implementation Definit
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Appendix D C and C++ Compiler Imple
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C and C++ Compiler Implementation L
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C and C++ Compiler Implementation L
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Appendix E Using NEON Support This
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Using NEON Support E.2 Vector data
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Using NEON Support • Vector long
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Using NEON Support uint64x1_t vqadd
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Using NEON Support Vector multiply
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Using NEON Support int64x1_t vqsub_
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Using NEON Support uint32x2_t vcle_
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Using NEON Support uint16x4_t vabd_
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Using NEON Support Long pairwise ad
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Using NEON Support int16x8_t vqshlq
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Using NEON Support uint8x8_t vrshr_
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Using NEON Support Vector signed->u
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Using NEON Support uint8x16_t vld1q
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Using NEON Support int16x4_t lane);
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Using NEON Support // VST1.8 {d0},
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Using NEON Support uint64x1x2_t vld
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Using NEON Support float32x2x4_t vl
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Using NEON Support lane); // VLD2.8
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Using NEON Support // VLD4.16 {d0[0
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Using NEON Support // VST3.32 {d0,
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Using NEON Support // VST3.32 {d0[0
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Using NEON Support uint8x8_t vset_l
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Using NEON Support float32x2_t vmov
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Using NEON Support uint32x2_t vcvt_
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Using NEON Support // VMLA.I16 d0,
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Using NEON Support Vector long mult
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Using NEON Support Vector widening
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Using NEON Support int8x16_t vqabsq
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Using NEON Support Bitwise and int8
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Using NEON Support Bitwise Select N
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Using NEON Support E.3.31 Vector re
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