mirror of https://github.com/rust-lang/rust.git
74 lines
2.2 KiB
Rust
74 lines
2.2 KiB
Rust
//@run-pass
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#![feature(repr_simd, intrinsics)]
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extern "rust-intrinsic" {
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fn simd_bitmask<T, U>(v: T) -> U;
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fn simd_select_bitmask<T, U>(m: T, a: U, b: U) -> U;
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}
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#[derive(Copy, Clone)]
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#[repr(simd)]
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struct Simd<T, const N: usize>([T; N]);
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fn main() {
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unsafe {
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let v = Simd::<i8, 4>([-1, 0, -1, 0]);
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let i: u8 = simd_bitmask(v);
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let a: [u8; 1] = simd_bitmask(v);
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if cfg!(target_endian = "little") {
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assert_eq!(i, 0b0101);
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assert_eq!(a, [0b0101]);
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} else {
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assert_eq!(i, 0b1010);
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assert_eq!(a, [0b1010]);
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}
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let v = Simd::<i8, 16>([0, 0, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, -1, 0]);
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let i: u16 = simd_bitmask(v);
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let a: [u8; 2] = simd_bitmask(v);
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if cfg!(target_endian = "little") {
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assert_eq!(i, 0b0101000000001100);
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assert_eq!(a, [0b00001100, 0b01010000]);
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} else {
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assert_eq!(i, 0b0011000000001010);
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assert_eq!(a, [0b00110000, 0b00001010]);
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}
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}
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unsafe {
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let a = Simd::<i32, 4>([0, 1, 2, 3]);
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let b = Simd::<i32, 4>([8, 9, 10, 11]);
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let e = [0, 9, 2, 11];
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let mask = if cfg!(target_endian = "little") { 0b0101u8 } else { 0b1010u8 };
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let r = simd_select_bitmask(mask, a, b);
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assert_eq!(r.0, e);
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let mask = if cfg!(target_endian = "little") { [0b0101u8] } else { [0b1010u8] };
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let r = simd_select_bitmask(mask, a, b);
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assert_eq!(r.0, e);
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let a = Simd::<i32, 16>([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15]);
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let b = Simd::<i32, 16>([16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31]);
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let e = [16, 17, 2, 3, 20, 21, 22, 23, 24, 25, 26, 27, 12, 29, 14, 31];
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let mask = if cfg!(target_endian = "little") {
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0b0101000000001100u16
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} else {
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0b0011000000001010u16
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};
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let r = simd_select_bitmask(mask, a, b);
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assert_eq!(r.0, e);
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let mask = if cfg!(target_endian = "little") {
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[0b00001100u8, 0b01010000u8]
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} else {
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[0b00110000u8, 0b00001010u8]
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};
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let r = simd_select_bitmask(mask, a, b);
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assert_eq!(r.0, e);
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}
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}
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