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Compiler-specific Features Table 4-16 (continued) Intrinsic Summary description Returns Byte lanes Operands Side-effects __usad8 4x8-bit unsigned subtraction, add absolute values of the differences together, return result as single unsigned integer uint32 uint8x4, uint8x4 None __usada8 4x8-bit unsigned subtraction, add absolute values of the differences together, and add result to third operand uint32 uint8x4, uint8x4, uint32 None __usax Exchange halfwords of second operand, subtract high halfwords and add low halfwords uint16x2 uint16x2, uint16x2 APSR.GE bits __usat16 Saturate two 16-bit values to a selected unsigned range. Input values are signed and output values are non-negative. int16x2 int16x2, /*constant* / unsigned int Q flag __usub16 2x16-bit unsigned subtraction uint16x2 uint16x2, uint16x2 __usub8 4x8-bit unsigned subtraction uint8x4 uint8x4, uint8x4 APSR.GE bits APSR.GE bits __uxtab16 Two values at bit positions [23:16][7:0] are extracted from the second operand, zero-extended to 16 bits, and added to the first operand uint16x2 uint8x4, uint16x2 None __uxtb16 Two values at bit positions [23:16][7:0] are extracted from the operand and zero-extended to 16 bits uint16x2 uint8x4 None 4-116 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler-specific Features 4.7.47 ARMv6 SIMD intrinsics, compatible processors and architectures Table 4-17 lists some ARMv6 SIMD instruction intrinsics and compatible processors and architectures, as examples of compatibility. Use of intrinsics that are not available on your target platform results in linkage failure with undefined symbols. Table 4-17 Intrinsics __qadd16, __qadd8, __qasx Compatible --cpu options 6, 6K, 6T2, 6Z, 7-A, 7-R, 7-A.security, Cortex-R4, Cortex-R4F, Cortex-A8, Cortex-A8.no_neon, Cortex-A8NoNEON, Cortex-A9, Cortex-A9.no_neon, Cortex-A9.no_neon.no_vfp, ARM1136J-S, ARM1136JF-S, ARM1136J-S-rev1, ARM1136JF-S-rev1, ARM1156T2-S, ARM1156T2F-S, ARM1176JZ-S, ARM1176JZF-S, MPCore, MPCore.no_vfp, MPCoreNoVFP, 88FR111, 88FR111.no_hw_divide, QSP, QSP.no_neon, QSP.no_neon.no_vfp See also Reference • --cpu=list on page 2-30 • --cpu=name on page 2-30. ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 4-117 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 Synta
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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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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 static int y =
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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 int counter __a
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Language Extensions 3.6.12 Structur
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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 __weak v
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Compiler-specific Features 4.3 Func
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Compiler-specific Features 4.4 Type
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Compiler-specific Features • Bit-
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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
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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 uint8x8_t vset_l
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Using NEON Support float32x2_t vmov
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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 Bitwise and int8
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Using NEON Support E.3.31 Vector re
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