RealView Compilation Tools Compiler Reference Guide - ARM ...

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Compiler-specific Features See also • __packed on page 4-11 • Packed structures on page 5-10 • The __packed qualifier and unaligned accesses to data on page 4-24 in the Compiler User Guide • __packed structures versus individually __packed fields on page 4-26 in the Compiler User Guide. 4.4.3 __attribute__((transparent_union)) The transparent_union type attribute enables you to specify a transparent_union type, that is, a union data type qualified with __attribute__((transparent_union))__. When a function is defined with a parameter having transparent union type, a call to the function with an argument of any type in the union results in the initialization of a union object whose member has the type of the passed argument and whose value is set to the value of the passed argument. When a union data type is qualified with __attribute__((transparent_union)), the transparent union applies to all function parameters with that type. Note This type attribute is a GNU compiler extension that is supported by the ARM compiler. Note Individual function parameters might also be qualified with the corresponding __attribute__((transparent_union)) variable attribute. Example typedef union { int i; float f; } U __attribute__((transparent_union)); void foo(U u) { static int s; s += u.i; /* Use the 'int' field */ } 4-38 Copyright © 2007, 2010 ARM Limited. All rights reserved. ARM DUI 0348A Non-Confidential
Compiler-specific Features void caller(void) { foo(1); /* u.i is set to 1 */ foo(1.0f); /* u.f is set to 1.0f */ } Mode Supported in GNU mode only. See also • __attribute__((transparent_union)) on page 4-45. ARM DUI 0348A Copyright © 2007, 2010 ARM Limited. All rights reserved. 4-39 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 If --
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Compiler Command-line Options • I
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Compiler Command-line Options N #if
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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 Restr
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Compiler Command-line Options • S
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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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Page 147 and 148: Chapter 4 Compiler-specific Feature
Page 149 and 150: Compiler-specific Features Usage __
Page 151 and 152: Compiler-specific Features Example
Page 153 and 154: Compiler-specific Features 4.1.6 __
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Page 159 and 160: Compiler-specific Features short x;
Page 161 and 162: Compiler-specific Features Where: s
Page 163 and 164: Compiler-specific Features typedef
Page 165 and 166: Compiler-specific Features • 0-25
Page 167 and 168: Compiler-specific Features Usage Fu
Page 173 and 174: Compiler-specific Features }; __dec
Page 175 and 176: Compiler-specific Features 4.3 Func
Page 177 and 178: Compiler-specific Features The comp
Page 179 and 180: Compiler-specific Features Note Thi
Page 181 and 182: Compiler-specific Features In the f
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Page 187 and 188: Compiler-specific Features replaced
Page 189 and 190: Compiler-specific Features Note Thi
Page 195 and 196: Compiler-specific Features 4.6 Prag
Page 197 and 198: Compiler-specific Features • Temp
Page 199 and 200: Compiler-specific Features Syntax #
Page 201 and 202: Compiler-specific Features #pragma
Page 203 and 204: Compiler-specific Features • __at
Page 205 and 206: Compiler-specific Features 4.6.20 #
Page 207 and 208: Compiler-specific Features If the i
Page 209 and 210: Compiler-specific Features 4.7 Inst
Page 215 and 216: Compiler-specific Features Where: c
Page 217 and 218: Compiler-specific Features Return v
Page 219 and 220: Compiler-specific Features See also
Page 221 and 222: Compiler-specific Features Syntax v
Page 223 and 224: Compiler-specific Features Where: p
Page 225 and 226: Compiler-specific Features Syntax v
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Page 229 and 230: Compiler-specific Features Note The
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Compiler-specific Features sat must
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Compiler-specific Features Syntax v
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Compiler-specific Features Example
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Compiler-specific Features See also
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Compiler-specific Features unsigned
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Compiler-specific Features int32_t
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Compiler-specific Features See also
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Compiler-specific Features 4.8 Comp
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Compiler-specific Features Table 4-
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Compiler-specific Features Table 4-
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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 satur
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Using NEON Support Vector add high
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Using NEON Support Vector saturatin
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Using NEON Support uint64x1_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 int64x1_t vld1_l
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Using NEON Support // VST1.16 {d0[0
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Using NEON Support // VLD3.32 {d0,
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Using NEON Support // VLD3.16 {d0[]
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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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