https://github.com/zchrissirhcz/neon_sim
Implement ARM NEON intrinsics in C++
https://github.com/zchrissirhcz/neon_sim
arm intrinsics neon simulation
Last synced: 3 months ago
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Implement ARM NEON intrinsics in C++
- Host: GitHub
- URL: https://github.com/zchrissirhcz/neon_sim
- Owner: zchrissirhcz
- License: mit
- Created: 2022-03-20T16:13:01.000Z (over 3 years ago)
- Default Branch: main
- Last Pushed: 2024-05-14T12:06:49.000Z (over 1 year ago)
- Last Synced: 2025-04-11T21:13:56.410Z (6 months ago)
- Topics: arm, intrinsics, neon, simulation
- Language: C++
- Homepage:
- Size: 562 KB
- Stars: 20
- Watchers: 3
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# neon_sim
ARM NEON Intrinsics implementation in C, for accurate understanding of each "neon function".
## Usage
Replace
```cpp
#if __ARM_NEON
#include
#endif // __ARM_NEON
```
with
```cpp
#include "neon_sim.h"
```
## Features
- Real cross-platform
- 100% in C/C++, no SSE stuffs
- "Debuggable inside the intrinsics"
- Closer to native neon usage
- Support initializer list
```cpp
int8x8_t a = { 1, -2, 3, 4, 5, 6, 7, 8 };
```
- Support compile time vector type checking
```cpp
uint8_t b[4] = { 5, 6, 7, 8 };
uint16x4_t v_b = vld1_u16(b);
```
- Support same-length-different-type conversion(require `-flax-vector-conversions` sometimes)
## Known issues
1. The correctness of the simulation implementation is not guaranteed.
2. However, the accuracy can be improved by adding examples and continuously verifying.
3. Not support inline assembly, i.e. `asm volatile("...")` stuffs.
4. `vgetq_lane_f32(sum_vec, 4)` failed to check-and-report index out of bounds of `[0, 3]` in compile time.