package main

import (
    "fmt"
    "unsafe"
)

func newSIMDFloat32() []float32 {
    const align = 256 / 8 // SIMD
    const size = unsafe.Sizeof(float32(0))
    s32 := make([]float32, 2*align/size)
    p := uintptr(unsafe.Pointer(&s32[0]))
    p = ((p+align-1)/align*align - p) / size
    return s32[p : p+align/size : p+align/size]
}

func main() {
    s32 := newSIMDFloat32()
    fmt.Printf("SIMD %T %d %d %p %gn", s32, len(s32), cap(s32), &s32[0], s32)
    CArgPtr := &s32[0]
    fmt.Println(CArgPtr)
}

SIMD []float32 8 8 0x10436080 [0 0 0 0 0 0 0 0]
0x10436080