RealView Compilation Tools Compiler Reference Guide - ARM ...

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Compiler-specific Features See also • --diag_warning=optimizations on page 2-31 • -Onum on page 2-66 • -Otime on page 2-69 • --[no_]vectorize on page 2-91 • #pragma unroll [(n)] on page 4-59 • Optimizing loops on page 4-4 in the Compiler User Guide. 4.6.23 #pragma thumb This pragma switches code generation to the Thumb instruction set. It overrides the --arm compiler option. If you are compiling code for a pre-Thumb-2 processor and using VFP, any function containing floating-point operations is compiled for ARM. See also • --arm on page 2-7 • --thumb on page 2-86 • #pragma arm on page 4-50. 4-62 Copyright © 2007, 2010 ARM Limited. All rights reserved. ARM DUI 0348A Non-Confidential
Compiler-specific Features 4.7 Instruction intrinsics This section describes instruction intrinsics for realizing ARM machine language instructions from C or C++ code. Table 4-7 summarizes the available intrinsics. Table 4-7 Instruction intrinsics supported by the ARM compiler Instruction intrinsics __breakpoint __enable_irq __return_address __builtin_clz __fabs __ror __builtin_constant_p __fabsf __schedule_barrier __builtin_expect __force_stores __semihost __builtin_frame_address __ldrex __sev __builtin_return_address __ldrt __sqrt __builtin_popcount __memory_changed __sqrtf __cdp __nop __ssat __clrex __pld __strex __clz __pli __strt __current_pc __qadd __swp __current_sp __qdbl __usat __disable_fiq __qsub __wfe __disable_irq __rbit __wfi __enable_fiq __rev __yield 4.7.1 __breakpoint This intrinsic inserts a BKPT instruction into the instruction stream generated by the compiler. It enables you to include a breakpoint instruction in your C or C++ code. Syntax void __breakpoint(int val) ARM DUI 0348A Copyright © 2007, 2010 ARM Limited. All rights reserved. 4-63 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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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 Example
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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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