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[Doc] Add C++ namespace to docs

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Fixes #117
This commit is contained in:
Guillaume Chatelet 2020-09-21 09:57:09 +00:00
parent 3dc868037a
commit 68fa870479
1 changed files with 8 additions and 0 deletions
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@ -30,6 +30,10 @@ instructions) at runtime.
- **Unit tested.** - **Unit tested.**
<a name="codesample"></a> <a name="codesample"></a>
## Code samples
**Note:** For C++ code, the library functions are defined in the `CpuFeatures` namespace.
### Checking features at runtime ### Checking features at runtime
Here's a simple example that executes a codepath if the CPU supports both the Here's a simple example that executes a codepath if the CPU supports both the
@ -38,6 +42,7 @@ AES and the SSE4.2 instruction sets:
```c ```c
#include "cpuinfo_x86.h" #include "cpuinfo_x86.h"
// For C++, add `using namespace CpuFeatures;`
static const X86Features features = GetX86Info().features; static const X86Features features = GetX86Info().features;
void Compute(void) { void Compute(void) {
@ -59,6 +64,7 @@ features and then check whether AES and NEON are supported.
#include <stdbool.h> #include <stdbool.h>
#include "cpuinfo_arm.h" #include "cpuinfo_arm.h"
// For C++, add `using namespace CpuFeatures;`
static const ArmFeatures features = GetArmInfo().features; static const ArmFeatures features = GetArmInfo().features;
static const bool has_aes_and_neon = features.aes && features.neon; static const bool has_aes_and_neon = features.aes && features.neon;
@ -78,6 +84,7 @@ instruction set (e.g., `g++ -mavx`) and sets `has_avx` accordingly.
#include <stdbool.h> #include <stdbool.h>
#include "cpuinfo_x86.h" #include "cpuinfo_x86.h"
// For C++, add `using namespace CpuFeatures;`
static const X86Features features = GetX86Info().features; static const X86Features features = GetX86Info().features;
static const bool has_avx = CPU_FEATURES_COMPILED_X86_AVX || features.avx; static const bool has_avx = CPU_FEATURES_COMPILED_X86_AVX || features.avx;
@ -100,6 +107,7 @@ set&mdash;but only if it's not Sandy Bridge.
#include <stdbool.h> #include <stdbool.h>
#include "cpuinfo_x86.h" #include "cpuinfo_x86.h"
// For C++, add `using namespace CpuFeatures;`
static const X86Info info = GetX86Info(); static const X86Info info = GetX86Info();
static const X86Microarchitecture uarch = GetX86Microarchitecture(&info); static const X86Microarchitecture uarch = GetX86Microarchitecture(&info);
static const bool has_fast_avx = info.features.avx && uarch != INTEL_SNB; static const bool has_fast_avx = info.features.avx && uarch != INTEL_SNB;