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add gather/scatter tests for pointers of pointers

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This commit is contained in:
gnzlbg 2018-05-09 17:09:50 +02:00
parent 1ffc30a459
commit 180342df0b
1 changed files with 71 additions and 0 deletions
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71
src/test/run-pass/simd-intrinsic-generic-gather.rs
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@ -77,4 +77,75 @@ fn main() {
assert_eq!(x, [42., 1., 43., 3., 4., 5., 45., 7.]);
}
// test modifying array of *const f32
let mut y = [
&x[0] as *const f32,
&x[1] as *const f32,
&x[2] as *const f32,
&x[3] as *const f32,
&x[4] as *const f32,
&x[5] as *const f32,
&x[6] as *const f32,
&x[7] as *const f32
];
let default = x4(y[0], y[0], y[0], y[0]);
let s_strided = x4(y[0], y[2], y[0], y[6]);
// reading from *const
unsafe {
let pointer = &y[0] as *const *const f32;
let pointers = x4(
pointer.offset(0) as *const *const f32,
pointer.offset(2),
pointer.offset(4),
pointer.offset(6)
);
let r_strided = simd_gather(default, pointers, mask);
assert_eq!(r_strided, s_strided);
}
// reading from *mut
unsafe {
let pointer = &mut y[0] as *mut *const f32;
let pointers = x4(
pointer.offset(0) as *mut *const f32,
pointer.offset(2),
pointer.offset(4),
pointer.offset(6)
);
let r_strided = simd_gather(default, pointers, mask);
assert_eq!(r_strided, s_strided);
}
// writing to *mut
unsafe {
let pointer = &mut y[0] as *mut *const f32;
let pointers = x4(
pointer.offset(0) as *mut *const f32,
pointer.offset(2),
pointer.offset(4),
pointer.offset(6)
);
let values = x4(y[7], y[6], y[5], y[1]);
simd_scatter(values, pointers, mask);
let s = [
&x[7] as *const f32,
&x[1] as *const f32,
&x[6] as *const f32,
&x[3] as *const f32,
&x[4] as *const f32,
&x[5] as *const f32,
&x[1] as *const f32,
&x[7] as *const f32
];
assert_eq!(y, s);
}
}