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Compiler-specific Features 4.9.2 Usage You can declare named register variables as global variables. You can declare some, but not all, named register variables as local variables. In general, do not declare VFP registers and core registers as local variables. Do not declare caller-save registers, such as R0, as local variables. 4.9.3 Example In the following example, foo is declared globally as a named register variable for the register r0. register int foo __asm("r0"); void func(void) { .... } 4.9.4 See also • Named register variables on page 4-12 in the Compiler User Guide. 4-194 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler-specific Features 4.10 GNU builtin functions These functions provide compatibility with GNU library header files. The functions are described in the GNU documentation. See http://gcc.gnu.org. See also --gnu_version=version on page 2-69. 4.10.1 Nonstandard functions __builtin_alloca(), __builtin_bcmp(), __builtin_exit(), __builtin_gamma(), __builtin_gammaf(), __builtin_gammal(), __builtin_index(), __builtin_rindex(), __builtin_strcasecmp(), __builtin_strncasecmp(). 4.10.2 C99 functions __builtin_Exit(), __builtin_acoshf(), __builtin_acoshl(), __builtin_acosh(), __builtin_asinhf(), __builtin_asinhl(), __builtin_asinh(), __builtin_atanhf(), __builtin_atanhl(), __builtin_atanh(), __builtin_cabsf(), __builtin_cabsl(), __builtin_cabs(), __builtin_cacosf(), __builtin_cacoshf(), __builtin_cacoshl(), __builtin_cacosh(), __builtin_cacosl(), __builtin_cacos(), __builtin_cargf(), __builtin_cargl(), __builtin_carg(), __builtin_casinf(), __builtin_casinhf(), __builtin_casinhl(), __builtin_casinh(), __builtin_casinl(), __builtin_casin(), __builtin_catanf(), __builtin_catanhf(), __builtin_catanhl(), __builtin_catanh(), __builtin_catanl(), __builtin_catan(), __builtin_cbrtf(), __builtin_cbrtl(), __builtin_cbrt(), __builtin_ccosf(), __builtin_ccoshf(), __builtin_ccoshl(), __builtin_ccosh(), __builtin_ccosl(), __builtin_ccos(), __builtin_cexpf(), __builtin_cexpl(), __builtin_cexp(), __builtin_cimagf(), __builtin_cimagl(), __builtin_cimag(), __builtin_clogf(), __builtin_clogl(), __builtin_clog(), __builtin_conjf(), __builtin_conjl(), __builtin_conj(), __builtin_copysignf(), __builtin_copysignl(), __builtin_copysign(), __builtin_cpowf(), __builtin_cpowl(), __builtin_cpow(), __builtin_cprojf(), __builtin_cprojl(), __builtin_cproj(), __builtin_crealf(), __builtin_creall(), __builtin_creal(), __builtin_csinf(), __builtin_csinhf(), __builtin_csinhl(), __builtin_csinh(), __builtin_csinl(), __builtin_csin(), __builtin_csqrtf(), __builtin_csqrtl(), __builtin_csqrt(), __builtin_ctanf(), __builtin_ctanhf(), __builtin_ctanhl(), __builtin_ctanh(), __builtin_ctanl(), __builtin_ctan(), __builtin_erfcf(), __builtin_erfcl(), __builtin_erfc(), __builtin_erff(), __builtin_erfl(), __builtin_erf(), __builtin_exp2f(), __builtin_exp2l(), __builtin_exp2(), __builtin_expm1f(), __builtin_expm1l(), __builtin_expm1(), __builtin_fdimf(), __builtin_fdiml(), __builtin_fdim(), __builtin_fmaf(), __builtin_fmal(), __builtin_fmaxf(), __builtin_fmaxl(), __builtin_fmax(), __builtin_fma(), __builtin_fminf(), __builtin_fminl(), __builtin_fmin(), __builtin_hypotf(), __builtin_hypotl(), __builtin_hypot(), __builtin_ilogbf(), __builtin_ilogbl(), __builtin_ilogb(), __builtin_imaxabs(), __builtin_isblank(), __builtin_isfinite(), __builtin_isinf(), __builtin_isnan(), __builtin_isnanf(), __builtin_isnanl(), __builtin_isnormal(), __builtin_iswblank(), __builtin_lgammaf(), __builtin_lgammal(), __builtin_lgamma(), __builtin_llabs(), __builtin_llrintf(), __builtin_llrintl(), __builtin_llrint(), __builtin_llroundf(), __builtin_llroundl(), __builtin_llround(), ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 4-195 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 Usage
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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 3.4.4 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 GNU languag
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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 Example
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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 uint32x2_t vcle_
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