[simd.cassign]

# 29 Numerics library [[numerics]](./#numerics)

## 29.10 Data-parallel types [[simd]](simd#cassign)

### 29.10.8 basic_vec non-member operations [[simd.nonmembers]](simd.nonmembers#simd.cassign)

#### 29.10.8.2 basic_vec compound assignment [simd.cassign]

[ð](#lib:operator+=,basic_vec)

`friend constexpr basic_vec& operator+=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator-=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator*=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator/=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator%=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator&=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator|=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator^=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator<<=(basic_vec& lhs, const basic_vec& rhs) noexcept;
friend constexpr basic_vec& operator>>=(basic_vec& lhs, const basic_vec& rhs) noexcept;
`

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18217)

Let *op* be the operator[.](#1.sentence-1)

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18220)

*Constraints*: requires (value_type a, value_type b) { a *op* b; } istrue[.](#2.sentence-1)

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18225)

*Effects*: These operators apply the indicated operator to lhs and rhs as
an element-wise operation[.](#3.sentence-1)

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18230)

*Returns*: lhs[.](#4.sentence-1)

[ð](#lib:operator%3c%3c=,basic_vec_)

`friend constexpr basic_vec& operator<<=(basic_vec& lhs, simd-size-type n) noexcept;
friend constexpr basic_vec& operator>>=(basic_vec& lhs, simd-size-type n) noexcept;
`

[5](#5)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18243)

Let *op* be the operator[.](#5.sentence-1)

[6](#6)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18246)

*Constraints*: requires (value_type a, *simd-size-type* b) { a*op* b; } is true[.](#6.sentence-1)

[7](#7)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/numerics.tex#L18251)

*Effects*: Equivalent to: return operator *op* (lhs, basic_vec(n));
