johann/cpu_features
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Add <stdbool.h> to examples where needed, pluse minor stylistic touch-up.

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Guillaume Chatelet 2018-02-13 14:19:25 +01:00
parent f7e0a6d066
commit 36df25b7bc
1 changed files with 7 additions and 4 deletions
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README.md
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@ -55,6 +55,7 @@ then query for the specific features you care about. Below, we store all the ARM
features and then check whether AES and NEON are supported. features and then check whether AES and NEON are supported.
```c ```c
#include <stdbool.h>
#include "cpuinfo_arm.h" #include "cpuinfo_arm.h"
static const ArmFeatures features = GetArmInfo().features; static const ArmFeatures features = GetArmInfo().features;
@ -73,6 +74,7 @@ The following code determines whether the compiler was told to use the AVX
instruction set (e.g., `g++ -mavx`) and sets `has_avx` accordingly. instruction set (e.g., `g++ -mavx`) and sets `has_avx` accordingly.
```c ```c
#include <stdbool.h>
#include "cpuinfo_x86.h" #include "cpuinfo_x86.h"
static const X86Features features = GetX86Info().features; static const X86Features features = GetX86Info().features;
@ -87,13 +89,14 @@ use AVX and 0 otherwise, combining compile time and runtime knowledge.
### Rejecting poor hardware implementations based on microarchitecture ### Rejecting poor hardware implementations based on microarchitecture
On x86, the first incarnation of a feature in a microarchitecture might not be On x86, the first incarnation of a feature in a microarchitecture might not be
the most efficient (e.g., AVX on Sandy Bridge). We provide a function to the most efficient (e.g. AVX on Sandy Bridge). We provide a function to retrieve
retrieve the underlying microarchitecture so you can decide whether to use it. the underlying microarchitecture so you can decide whether to use it.
Below, `has_fast_avx` is set to 1 if the CPU supports the AVX instruction Below, `has_fast_avx` is set to 1 if the CPU supports the AVX instruction
set&mdash;but only if it's not Sandy Bridge. set&mdash;but only if it's not Sandy Bridge.
```c ```c
#include <stdbool.h>
#include "cpuinfo_x86.h" #include "cpuinfo_x86.h"
static const X86Info info = GetX86Info(); static const X86Info info = GetX86Info();
@ -154,4 +157,4 @@ See [LICENSE](LICENSE) for more information.
<a name="cmake"></a> <a name="cmake"></a>
## Build with CMake ## Build with CMake
Please check the [CMake build instructions](cmake/README.md) Please check the [CMake build instructions](cmake/README.md).