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Compiler-specific Features 4.7.74 __smuad intrinsic This intrinsic inserts an SMUAD instruction into the instruction stream generated by the compiler. It enables you to perform two 16-bit signed multiplications, adding the products together. The Q bit is set if the addition overflows. unsigned int__smuad(unsigned int val1, unsigned int val2) Where: val1 val2 holds the first halfword operands for each multiplication holds the second halfword operands for each multiplication. The __smuad intrinsic returns the products of the two 16-bit signed multiplications. Example: unsigned int dual_multiply_prods(unsigned int val1, unsigned int val2) { unsigned int res; } res = __smuad(val1,val2); /* p1 = val1[15:0] × val2[15:0] p2 = val1[31:16] × val2[31:16] res[31:0] = p1 + p2 */ return res; See also • ARMv6 SIMD intrinsics on page 4-109 • Instruction summary on page 4-2 in the Assembler Guide • SMUAD{X} and SMUSD{X} on page 4-82 in the Assembler Guide. 4-150 Copyright © 2007-2010 ARM. All rights reserved. ARM DUI 0348C Non-Confidential, ID101213
Compiler-specific Features 4.7.75 __smusd intrinsic This intrinsic inserts an SMUSD instruction into the instruction stream generated by the compiler. It enables you to perform two 16-bit signed multiplications, taking the difference of the products by subtracting the high halfword product from the low halfword product. unsigned int__smusd(unsigned int val1, unsigned int val2) Where: val1 val2 holds the first halfword operands for each multiplication holds the second halfword operands for each multiplication. The __smusd intrinsic returns the difference of the products of the two 16-bit signed multiplications. Example: unsigned int dual_multiply_prods(unsigned int val1, unsigned int val2) { unsigned int res; } res = __smuad(val1,val2); /* p1 = val1[15:0] × val2[15:0] p2 = val1[31:16] × val2[31:16] res[31:0] = p1 - p2 */ return res; See also • ARMv6 SIMD intrinsics on page 4-109 • Instruction summary on page 4-2 in the Assembler Guide • SMUAD{X} and SMUSD{X} on page 4-82 in the Assembler Guide. ARM DUI 0348C Copyright © 2007-2010 ARM. All rights reserved. 4-151 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 Defau
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Compiler Command-line Options Usage
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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 3.5 Standard C+
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Language Extensions Example 3-2 Lin
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Compiler-specific Features Usage __
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C and C++ Implementation Details 5.
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C and C++ Implementation Details No
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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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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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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 uint8x8_t vrshr_
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Using NEON Support uint8x16_t vld1q
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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 Vector long mult
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