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Language Extensions This is most useful if the test modifies the value in some way, for example: i++ : j; where i++ comes from a macro. If you write code in this way, then i++ is evaluated only once. If the original value of i is nonzero, the result is the original value of i. Regardless of this, i is incremented once. Mode Supported in GNU mode only. Supported languages are C90, C99 and C++. 3.7.8 Designated inits As in C99, designated initializers are supported. Example int a[6] = { [4] = 29, [2] = 15 }; int b[6] = { 0,0,15,0,29,0 }; // a[] is equivalent to b[] Mode Supported in GNU mode for C90 and C++ only. See also • New features of C99 on page 5-45 in the Compiler User Guide. 3.7.9 Extended lvalues The definition of what constitutes an lvalue when looking at comma expressions and : constructs is relaxed in GNU mode. You can use compound expressions, conditional expressions, and casts as follows: • You can assign a compound expression: (a++, b) += x; This is equivalent to: temp = (a++,b); b = temp + x • You can get the address of a compound expression &(a, b). This is equivalent to (a, &b). 3-28 Copyright © 2007-2010 <strong>ARM</strong>. All rights reserved. <strong>ARM</strong> DUI 0348C Non-Confidential, ID101213
Language Extensions • You can use conditional expressions, for example: (a b : c) = a; This picks b or c as the destination dependent on a. Mode Supported in GNU mode only for C90 and C99 only. 3.7.10 Initializers As in standard C++ and ISO C99, the elements of an aggregate initializer for an automatic variable are not required to be constant expressions. Mode Supported in GNU mode only for C90. Example float Initializers_0 (float f, float g) { float beat_freqs[2] = { f-g, f+g }; float aLocal; int i=0; for (; i
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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 • a
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Compiler Command-line Options Synta
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Compiler Command-line Options • I
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Compiler Command-line Options See a
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Compiler Command-line Options Compi
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Compiler Command-line Options Selec
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Compiler Command-line Options • R
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Compiler Command-line Options Usage
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Compiler Command-line Options A num
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Compiler Command-line Options vfpv3
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Compiler Command-line Options Restr
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Compiler Command-line Options The c
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Compiler Command-line Options The c
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Compiler Command-line Options #incl
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Page 135 and 136: Compiler Command-line Options 2.1.1
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Page 191 and 192: Chapter 4 Compiler-specific Feature
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Page 197 and 198: Compiler-specific Features Example
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Page 209 and 210: Compiler-specific Features Syntax _
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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 See also
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Compiler-specific Features 4.5.14 _
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Compiler-specific Features Default
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Compiler-specific Features • Chap
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Compiler-specific Features Where: t
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Compiler-specific Features This pra
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Compiler-specific Features • __at
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Compiler-specific Features Example
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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 Example
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Compiler-specific Features Syntax v
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Compiler-specific Features Where: p
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Compiler-specific Features Errors T
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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 • Para
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Compiler-specific Features 4.7.100
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Compiler-specific Features } int32_
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Compiler-specific Features 4.8 VFP
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Compiler-specific Features 4.10 GNU
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Compiler-specific Features __builti
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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 st
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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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