mirror of
https://github.com/llvm-mirror/libcxx.git
synced 2025-10-24 03:32:35 +08:00
373299533a
Summary: This patch adds a new macro _LIBCPP_HAS_NO_VECTOR_EXTENSION for detecting whether a vector extension (\_\_attribute\_\_((vector_size(num_bytes)))) is available. On the top of that, this patch implements the following API: * all constructors * operator[] * copy_from * copy_to It also defines simd_abi::native to use vector extension, if available. In GCC and Clang, certain values with vector extension are passed by registers, instead of memory. Based on D41148. Reviewers: mclow.lists, EricWF Subscribers: cfe-commits, MaskRay, lichray, sanjoy Differential Revision: https://reviews.llvm.org/D41376 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@338309 91177308-0d34-0410-b5e6-96231b3b80d8
42 lines
1.2 KiB
C++
42 lines
1.2 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// UNSUPPORTED: c++98, c++03, c++11, c++14
|
|
|
|
// <experimental/simd>
|
|
//
|
|
// [simd.casts]
|
|
// template <class T, class U, class Abi> see below ex::static_simd_cast<(const
|
|
// ex::simd<U, Abi>&);
|
|
|
|
#include <experimental/simd>
|
|
#include <cstdint>
|
|
|
|
namespace ex = std::experimental::parallelism_v2;
|
|
|
|
static_assert(
|
|
std::is_same<decltype(ex::static_simd_cast<float>(ex::native_simd<int>())),
|
|
ex::native_simd<float>>::value,
|
|
"");
|
|
|
|
static_assert(
|
|
std::is_same<decltype(ex::static_simd_cast<ex::fixed_size_simd<float, 1>>(
|
|
ex::simd<int, ex::simd_abi::scalar>())),
|
|
ex::fixed_size_simd<float, 1>>::value,
|
|
"");
|
|
|
|
static_assert(
|
|
std::is_same<
|
|
decltype(ex::static_simd_cast<ex::simd<float, ex::simd_abi::scalar>>(
|
|
ex::fixed_size_simd<int, 1>())),
|
|
ex::simd<float, ex::simd_abi::scalar>>::value,
|
|
"");
|
|
|
|
int main() {}
|