From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 src/test/ui/simd/intrinsic/generic-gather-pass.rs | 141 ++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 src/test/ui/simd/intrinsic/generic-gather-pass.rs

(limited to 'src/test/ui/simd/intrinsic/generic-gather-pass.rs')

diff --git a/src/test/ui/simd/intrinsic/generic-gather-pass.rs b/src/test/ui/simd/intrinsic/generic-gather-pass.rs
new file mode 100644
index 000000000..805caebe5
--- /dev/null
+++ b/src/test/ui/simd/intrinsic/generic-gather-pass.rs
@@ -0,0 +1,141 @@
+// run-pass
+// ignore-emscripten
+
+// Test that the simd_{gather,scatter} intrinsics produce the correct results.
+
+#![feature(repr_simd, platform_intrinsics)]
+#![allow(non_camel_case_types)]
+
+#[repr(simd)]
+#[derive(Copy, Clone, PartialEq, Debug)]
+struct x4<T>(pub T, pub T, pub T, pub T);
+
+extern "platform-intrinsic" {
+    fn simd_gather<T, U, V>(x: T, y: U, z: V) -> T;
+    fn simd_scatter<T, U, V>(x: T, y: U, z: V) -> ();
+}
+
+fn main() {
+    let mut x = [0_f32, 1., 2., 3., 4., 5., 6., 7.];
+
+    let default = x4(-3_f32, -3., -3., -3.);
+    let s_strided = x4(0_f32, 2., -3., 6.);
+    let mask = x4(-1_i32, -1, 0, -1);
+
+    // reading from *const
+    unsafe {
+        let pointer = &x[0] as *const f32;
+        let pointers =  x4(
+            pointer.offset(0) as *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 x[0] as *mut f32;
+        let pointers = x4(
+            pointer.offset(0) as *mut 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 x[0] as *mut f32;
+        let pointers = x4(
+            pointer.offset(0) as *mut f32,
+            pointer.offset(2),
+            pointer.offset(4),
+            pointer.offset(6)
+        );
+
+        let values = x4(42_f32, 43_f32, 44_f32, 45_f32);
+        simd_scatter(values, pointers, mask);
+
+        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);
+    }
+}
-- 
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