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Compiler-specific Features 4.7.48 ARMv6 SIMD instruction intrinsics and APSR GE flags Table 4-18 Intrinsic APSR.GE flag action APSR.GE operation __sel Reads GE flags if APSR.GE[0] == 1 then res[7:0] = val1[7:0] else val2[7:0] if APSR.GE[1] == 1 then res[15:8] = val1[15:8] else val2[15:8] if APSR.GE[2] == 1 then res[23:16] = val1[23:16] else val2[23:16] if APSR.GE[3] == 1 then res[31:24] = val1[31:24] else val2[31:24] __sadd16 Sets or clears GE flags if sum1 ≥ 0 then APSR.GE[1:0] = 11 else 00 if sum2 ≥ 0 then APSR.GE[3:2] = 11 else 00 __sadd8 Sets or clears GE flags if sum1 ≥ 0 then APSR.GE[0] = 1 else 0 if sum2 ≥ 0 then APSR.GE[1] = 1 else 0 if sum3 ≥ 0 then APSR.GE[2] = 1 else 0 if sum4 ≥ 0 then APSR.GE[3] = 1 else 0 __sasx Sets or clears GE flags if diff ≥ 0 then APSR.GE[1:0] = 11 else 00 if sum ≥ 0 then APSR.GE[3:2] = 11 else 00 __ssax Sets or clears GE flags if sum ≥ 0 then APSR.GE[1:0] = 11 else 00 if diff ≥ 0 then APSR.GE[3:2] = 11 else 00 __ssub16 Sets or clears GE flags if diff1 ≥ 0 then APSR.GE[1:0] = 11 else 00 if diff2 ≥ 0 then APSR.GE[3:2] = 11 else 00 __ssub8 Sets or clears GE flags if diff1 ≥ 0 then APSR.GE[0] = 1 else 0 if diff2 ≥ 0 then APSR.GE[1] = 1 else 0 if diff3 ≥ 0 then APSR.GE[2] = 1 else 0 if diff4 ≥ 0 then APSR.GE[3] = 1 else 0 __uadd16 Sets or clears GE flags if sum1 ≥ 0x10000 then APSR.GE[1:0] = 11 else 00 if sum2 ≥ 0x10000 then APSR.GE[3:2] = 11 else 00 __uadd8 Sets or clears GE flags if sum1 ≥ 0x100 then APSR.GE[0] = 1 else 0 if sum2 ≥ 0x100 then APSR.GE[1] = 1 else 0 if sum3 ≥ 0x100 then APSR.GE[2] = 1 else 0 if sum4 ≥ 0x100 then APSR.GE[3] = 1 else 0 __uasx Sets or clears GE flags if diff ≥ 0 then APSR.GE[1:0] = 11 else 00 if sum ≥ 0x10000 then APSR.GE[3:2] = 11 else 00 4-118 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler-specific Features Table 4-18 (continued) Intrinsic APSR.GE flag action APSR.GE operation __usax Sets or clears GE flags if sum ≥ 0x10000 then APSR.GE[1:0] = 11 else 00 if diff ≥ 0 then APSR.GE[3:2] = 11 else 00 __usub16 Sets or clears GE flags if diff1 ≥ 0 then APSR.GE[1:0] = 11 else 00 if diff2 ≥ 0 then APSR.GE[3:2] = 11 else 00 __usub8 Sets or clears GE flags if diff1 ≥ 0 then APSR.GE[0] = 1 else 0 if diff2 ≥ 0 then APSR.GE[1] = 1 else 0 if diff3 ≥ 0 then APSR.GE[2] = 1 else 0 if diff4 ≥ 0 then APSR.GE[3] = 1 else 0 ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 4-119 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 Examp
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Compiler Command-line Options Synta
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Compiler Command-line Options Compi
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Compiler Command-line Options Selec
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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 Error
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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 3.3 C99 languag
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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 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 See also
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Compiler-specific Features __weak v
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Compiler-specific Features Examples
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Compiler-specific Features 4.3 Func
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Compiler-specific Features 4.4 Type
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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 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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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 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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