CODEWITHSUNDEEP
cgoneon
Mono
Mono

Reputation: 81

Accessing NEON intrinsics from Go

How would one use NEON from Go? The following code

package main

// #include <arm_neon.h>
// #include <stdlib.h>
import "C"

func main() {
    C.vld1q_s32(nil)
}

gives me:

➜ go build .
./main.go:9:2: could not determine kind of name for C.vld1q_s32

I'm pretty sure I have access to NEON since the following does work in C

void add(int *a, int *b, int *c, int size) {
    for(int i = 0; i < size; i += 4) {
        int32x4_t av = vld1q_s32(&(a[i]));
        int32x4_t bv = vld1q_s32(&(b[i]));
        int32x4_t cv = vaddq_s32(av, bv);
        vst1q_s32(&(c[i]), cv);
    }
}

I'm using a M1 mac if that helps.

Upvotes: 3

Views: 90

Answers (1)

Mono
Mono

Reputation: 81

I've solved it by wrapping the macro around a function and the calling the function instead of the macro.

package main

// #include <arm_neon.h>
// #include <stdlib.h>
// int32x4_t _vld1q_s32(int32_t const * ptr) {
//     return vld1q_s32(ptr);
// }
import "C"

func main() {
    C._vld1q_s32(nil)
}

Upvotes: 1

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