mirror of
https://github.com/rust-lang/rust
synced 2024-09-06 01:11:17 +00:00
64 lines
1.9 KiB
Rust
64 lines
1.9 KiB
Rust
//@ compile-flags: -C no-prepopulate-passes
|
|
//
|
|
|
|
#![crate_type = "lib"]
|
|
|
|
#![feature(repr_simd, intrinsics)]
|
|
#![allow(non_camel_case_types)]
|
|
|
|
#[repr(simd)]
|
|
#[derive(Copy, Clone)]
|
|
pub struct u32x2(u32, u32);
|
|
|
|
#[repr(simd)]
|
|
#[derive(Copy, Clone)]
|
|
pub struct i32x2(i32, i32);
|
|
|
|
#[repr(simd)]
|
|
#[derive(Copy, Clone)]
|
|
pub struct i8x16(
|
|
i8, i8, i8, i8, i8, i8, i8, i8,
|
|
i8, i8, i8, i8, i8, i8, i8, i8,
|
|
);
|
|
|
|
|
|
extern "rust-intrinsic" {
|
|
fn simd_bitmask<T, U>(x: T) -> U;
|
|
}
|
|
|
|
// NOTE(eddyb) `%{{x|1}}` is used because on some targets (e.g. WASM)
|
|
// SIMD vectors are passed directly, resulting in `%x` being a vector,
|
|
// while on others they're passed indirectly, resulting in `%x` being
|
|
// a pointer to a vector, and `%1` a vector loaded from that pointer.
|
|
// This is controlled by the target spec option `simd_types_indirect`.
|
|
|
|
// CHECK-LABEL: @bitmask_int
|
|
#[no_mangle]
|
|
pub unsafe fn bitmask_int(x: i32x2) -> u8 {
|
|
// CHECK: [[A:%[0-9]+]] = lshr <2 x i32> %{{x|1}}, <i32 31, i32 31>
|
|
// CHECK: [[B:%[0-9]+]] = trunc <2 x i32> [[A]] to <2 x i1>
|
|
// CHECK: [[C:%[0-9]+]] = bitcast <2 x i1> [[B]] to i2
|
|
// CHECK: %{{[0-9]+}} = zext i2 [[C]] to i8
|
|
simd_bitmask(x)
|
|
}
|
|
|
|
// CHECK-LABEL: @bitmask_uint
|
|
#[no_mangle]
|
|
pub unsafe fn bitmask_uint(x: u32x2) -> u8 {
|
|
// CHECK: [[A:%[0-9]+]] = lshr <2 x i32> %{{x|1}}, <i32 31, i32 31>
|
|
// CHECK: [[B:%[0-9]+]] = trunc <2 x i32> [[A]] to <2 x i1>
|
|
// CHECK: [[C:%[0-9]+]] = bitcast <2 x i1> [[B]] to i2
|
|
// CHECK: %{{[0-9]+}} = zext i2 [[C]] to i8
|
|
simd_bitmask(x)
|
|
}
|
|
|
|
// CHECK-LABEL: @bitmask_int16
|
|
#[no_mangle]
|
|
pub unsafe fn bitmask_int16(x: i8x16) -> u16 {
|
|
// CHECK: [[A:%[0-9]+]] = lshr <16 x i8> %{{x|1|2}}, <i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7, i8 7>
|
|
// CHECK: [[B:%[0-9]+]] = trunc <16 x i8> [[A]] to <16 x i1>
|
|
// CHECK: %{{[0-9]+}} = bitcast <16 x i1> [[B]] to i16
|
|
// CHECK-NOT: zext
|
|
simd_bitmask(x)
|
|
}
|