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Compiler Command-line Options 2.1.74 --fpu=list This option lists the supported FPU architecture names that you can use with the --fpu=name option. Deprecated options are not listed. See also • --fpu=name. 2.1.75 --fpu=name This option enables you to determine the target FPU architecture. If you specify this option, it overrides any implicit FPU option that appears on the command line, for example, where you use the --cpu option. To obtain a full list of FPU architectures use the --fpu=list option. Syntax --fpu=name Where name is one of: none vfpv vfpv2 Selects no floating-point option. No floating-point code is to be used. This produces an error if your code contains float types. This is a synonym for vfpv2. Selects a hardware vector floating-point unit conforming to architecture VFPv2. Note If you enter armcc --thumb --fpu=vfpv2 on the command line, the compiler compiles as much of the code using the Thumb instruction set as possible, but hard floating-point sensitive functions are compiled to ARM code. In this case, the value of the predefine __thumb is not correct. If you specify either vfp or vfpv2 with the --arm option for ARM C code you must use the __softfp keyword to ensure that your interworking ARM code is compiled to use software floating-point linkage. 2-62 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler Command-line Options vfpv3 vfpv3_fp16 vfpv3_d16 Selects a hardware vector floating-point unit conforming to architecture VFPv3. VFPv3 is backwards compatible with VFPv2 except that VFPv3 cannot trap floating-point exceptions. vpfv3 is available in RealView Development Suite 3.0 and later only. Selects a hardware vector floating-point unit conforming to architecture VFPv3 that also provides the half-precision extensions. vfpv3_fp16 is available in RealView Development Suite 4.0 and later only. Selects a hardware vector floating-point unit conforming to VFPv3-D16 architecture. vfpv3_d16 is available in RealView Development Suite 4.0 and later only. vfpv3_d16_fp16 Selects a hardware vector floating-point unit conforming to VFPv3-D16 architecture, that also provides the half-precision extensions. vfpv3_d16_fp16 is available in RealView Development Suite 4.0 and later only. softvfp Selects the software floating-point library fplib. This is the default if you do not specify a --fpu option, or if you select a CPU that does not have an FPU. In previous releases of RVCT, if you specified --fpu=softvfp and a CPU with implicit VFP hardware, the linker chose a library that implemented the software floating-point calls using VFP instructions. This is no longer the case. If you require this legacy behavior, use --fpu=softvfp+vfp. softvfp+vfpv2 Selects a floating-point library with software floating-point linkage that can use VFPv2 instructions. Select this option if you are interworking Thumb code with ARM code on a system that implements a VFP unit. If you select this option: • Compiling with --thumb behaves in a similar way to --fpu=softvfp except that it links with floating-point libraries that use VFP instructions. • Compiling with --arm behaves in a similar way to --fpu=vfpv2 except that all functions are given software floating-point linkage. This means that functions pass and return floating-point arguments and results in the same way as --fpu=softvfp, but use VFP instructions internally. ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 2-63 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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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 Restrictions Th
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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 • 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 Example
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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 Default
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Compiler-specific Features 4.7.44 A
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Compiler-specific Features 4.7.47 A
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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 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 Bitwise and int8
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