Add AVX 512f gather, scatter and compare intrinsics (#866)

Co-authored-by: bjorn3 <[email protected]>

Author: Daniel Smith

crates/core_arch/src/simd.rs

@@ -198,10 +198,26 @@ simd_ty!(i32x16[i32]:
          | x0, x1, x2, x3, x4, x5, x6, x7,
          x8, x9, x10, x11, x12, x13, x14, x15);
 
+simd_ty!(u32x16[u32]:
+         u32, u32, u32, u32, u32, u32, u32, u32,
+         u32, u32, u32, u32, u32, u32, u32, u32
+         | x0, x1, x2, x3, x4, x5, x6, x7,
+         x8, x9, x10, x11, x12, x13, x14, x15);
+
+simd_ty!(f32x16[f32]:
+         f32, f32, f32, f32, f32, f32, f32, f32,
+         f32, f32, f32, f32, f32, f32, f32, f32
+         | x0, x1, x2, x3, x4, x5, x6, x7,
+         x8, x9, x10, x11, x12, x13, x14, x15);
+
 simd_ty!(i64x8[i64]:
          i64, i64, i64, i64, i64, i64, i64, i64
          | x0, x1, x2, x3, x4, x5, x6, x7);
 
 simd_ty!(u64x8[u64]:
          u64, u64, u64, u64, u64, u64, u64, u64
          | x0, x1, x2, x3, x4, x5, x6, x7);
+
+simd_ty!(f64x8[f64]:
+         f64, f64, f64, f64, f64, f64, f64, f64
+         | x0, x1, x2, x3, x4, x5, x6, x7);