RealView Compilation Tools Compiler Reference Guide - ARM ...

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Standard C Implementation Definition B.1.9 Structures, unions, enumerations, and bitfields The ISO/IEC C standard requires the following implementation details to be documented for structured data types: • the outcome when a member of a union is accessed using a member of different type • the padding and alignment of members of structures • whether a plain int bitfield is treated as a signed int bitfield or as an unsigned int bitfield • the order of allocation of bitfields within a unit • whether a bitfield can straddle a storage-unit boundary • the integer type chosen to represent the values of an enumeration type. See Chapter 5 C and C++ Implementation Details for more information. Unions See Unions on page 5-7 for information. Enumerations See Enumerations on page 5-7 for information. Padding and alignment of structures See Structures on page 5-8 for information. Bitfields See Bitfields on page 5-10 for information. B.1.10 Qualifiers An object that has a volatile-qualified type is accessed if any word or byte or halfword on ARM architectures that have halfword support, or it is read or written. For volatile-qualified objects, reads and writes occur as directly implied by the source code, in the order implied by the source code. The effect of accessing a volatile-qualified short is undefined on ARM architectures that do not have halfword support. B-6 Copyright © 2007, 2010 ARM Limited. All rights reserved. ARM DUI 0348A Non-Confidential
Standard C Implementation Definition B.1.11 Expression evaluation The compiler can re-order expressions involving only associative and commutative operators of equal precedence, even in the presence of parentheses. For example, a + (b + c) might be evaluated as (a + b) + c if a, b, and c are integer expressions. Between sequence points, t he compiler can evaluate expressions in any order, regardless of parentheses. Therefore, side effects of expressions between sequence points can occur in any order. The compiler can evaluate function arguments in any order. Any aspect of evaluation order not prescribed by the relevant standard can be varied by: • the optimization level you are compiling at • the release of the compiler you are using. ARM DUI 0348A Copyright © 2007, 2010 ARM Limited. All rights reserved. B-7 Non-Confidential
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® RealView Compilation Tools Versi
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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 • ARM datasheet or techni
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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 Defau
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Compiler Command-line Options Note
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Compiler Command-line Options Table
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Compiler Command-line Options int m
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Compiler Command-line Options See a
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Compiler Command-line Options • -
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Compiler Command-line Options • T
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Compiler Command-line Options Where
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Compiler Command-line Options Mode
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Compiler Command-line Options • #
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Compiler Command-line Options Synta
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Compiler Command-line Options When
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Compiler Command-line Options Examp
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Compiler Command-line Options A num
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Compiler Command-line Options softv
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Compiler Command-line Options 1 Res
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Compiler Command-line Options Restr
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Compiler Command-line Options • #
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Compiler Command-line Options Synta
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Compiler Command-line Options --no_
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Compiler Command-line Options --apc
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Compiler Command-line Options Selec
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Chapter 3 Language Extensions This
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Language Extensions 3.1.2 #include_
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Language Extensions 3.2 C99 languag
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Language Extensions 3.3 C99 languag
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Language Extensions Example void co
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Language Extensions static int y =
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Language Extensions 3.4.4 Dollar si
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Language Extensions 3.5 Standard C+
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Language Extensions Example 3-2 Lin
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Language Extensions 3.6 Standard C
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Language Extensions 3.6.4 Assembler
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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 3.7.10 Inline T
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Language Extensions Example int bar
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Chapter 4 Compiler-specific Feature
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Compiler-specific Features Usage __
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Compiler-specific Features Example
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Compiler-specific Features 4.1.6 __
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Compiler-specific Features 4.1.11 _
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Compiler-specific Features short x;
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Compiler-specific Features Where: s
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Compiler-specific Features typedef
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Compiler-specific Features • 0-25
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Compiler-specific Features Usage Fu
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Compiler-specific Features }; __dec
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Compiler-specific Features 4.3 Func
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Compiler-specific Features The comp
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Compiler-specific Features Note Thi
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Compiler-specific Features In the f
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Compiler-specific Features 4.4 Type
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Compiler-specific Features void cal
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Compiler-specific Features replaced
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Compiler-specific Features Note Thi
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Compiler-specific Features 4.6 Prag
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Compiler-specific Features • Temp
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Compiler-specific Features Syntax #
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Compiler-specific Features #pragma
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Compiler-specific Features • __at
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Compiler-specific Features 4.6.20 #
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Compiler-specific Features If the i
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Compiler-specific Features 4.7 Inst
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Compiler-specific Features Where: c
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Compiler-specific Features Return v
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Compiler-specific Features See also
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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 Syntax v
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Compiler-specific Features Where: v
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Compiler-specific Features Note The
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Page 301 and 302: Appendix E Using NEON Support This
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Using NEON Support // VLD3.32 {d0[0
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Using NEON Support void vst2_u64(__
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Using NEON Support void vst2q_lane_
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Using NEON Support float32_t vget_l
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Using NEON Support uint8x16_t vdupq
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Using NEON Support uint16x4_t vget_
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Using NEON Support E.3.25 Operation
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Using NEON Support int16x8_t vmulq_
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Using NEON Support Vector widening
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Using NEON Support Absolute: Vd[i]
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Using NEON Support uint8x8_t vmvn_u
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Using NEON Support int16x8_t vornq_
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Using NEON Support uint32x4x2_t vuz
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