aarch64 neon intrinsics: vmaxq_f32, vminq_f32, vaddvq_f32, vrndnq_f32 (rust-lang#1533)

Author: tjamaan

example/neon.rs

@@ -202,6 +202,44 @@ unsafe fn test_vqadd_u8() {
     assert_eq!(r, e);
 }
 
+#[cfg(target_arch = "aarch64")]
+unsafe fn test_vmaxq_f32() {
+    // AArch64 llvm intrinsic: llvm.aarch64.neon.fmax.v4f32
+    let a = f32x4::from([0., -1., 2., -3.]);
+    let b = f32x4::from([-4., 5., -6., 7.]);
+    let e = f32x4::from([0., 5., 2., 7.]);
+    let r: f32x4 = transmute(vmaxq_f32(transmute(a), transmute(b)));
+    assert_eq!(r, e);
+}
+
+#[cfg(target_arch = "aarch64")]
+unsafe fn test_vminq_f32() {
+    // AArch64 llvm intrinsic: llvm.aarch64.neon.fmin.v4f32
+    let a = f32x4::from([0., -1., 2., -3.]);
+    let b = f32x4::from([-4., 5., -6., 7.]);
+    let e = f32x4::from([-4., -1., -6., -3.]);
+    let r: f32x4 = transmute(vminq_f32(transmute(a), transmute(b)));
+    assert_eq!(r, e);
+}
+
+#[cfg(target_arch = "aarch64")]
+unsafe fn test_vaddvq_f32() {
+    // AArch64 llvm intrinsic: llvm.aarch64.neon.faddv.f32.v4f32
+    let a = f32x4::from([0., 1., 2., 3.]);
+    let e = 6f32;
+    let r = vaddvq_f32(transmute(a));
+    assert_eq!(r, e);
+}
+
+#[cfg(target_arch = "aarch64")]
+unsafe fn test_vrndnq_f32() {
+    // AArch64 llvm intrinsic: llvm.aarch64.neon.frintn.v4f32
+    let a = f32x4::from([0.1, -1.9, 4.5, 5.5]);
+    let e = f32x4::from([0., -2., 4., 6.]);
+    let r: f32x4 = transmute(vrndnq_f32(transmute(a)));
+    assert_eq!(r, e);
+}
+
 #[cfg(target_arch = "aarch64")]
 fn main() {
     unsafe {
@@ -229,6 +267,11 @@ fn main() {
 
         test_vqsub_u8();
         test_vqadd_u8();
+
+        test_vmaxq_f32();
+        test_vminq_f32();
+        test_vaddvq_f32();
+        test_vrndnq_f32();
     }
 }
 

src/intrinsics/llvm_aarch64.rs

@@ -91,6 +91,44 @@ pub(crate) fn codegen_aarch64_llvm_intrinsic_call<'tcx>(
             );
         }
 
+        _ if intrinsic.starts_with("llvm.aarch64.neon.fmax.v") => {
+            intrinsic_args!(fx, args => (x, y); intrinsic);
+
+            simd_pair_for_each_lane(
+                fx,
+                x,
+                y,
+                ret,
+                &|fx, _lane_ty, _res_lane_ty, x_lane, y_lane| fx.bcx.ins().fmax(x_lane, y_lane),
+            );
+        }
+
+        _ if intrinsic.starts_with("llvm.aarch64.neon.fmin.v") => {
+            intrinsic_args!(fx, args => (x, y); intrinsic);
+
+            simd_pair_for_each_lane(
+                fx,
+                x,
+                y,
+                ret,
+                &|fx, _lane_ty, _res_lane_ty, x_lane, y_lane| fx.bcx.ins().fmin(x_lane, y_lane),
+            );
+        }
+
+        _ if intrinsic.starts_with("llvm.aarch64.neon.faddv.f32.v") => {
+            intrinsic_args!(fx, args => (v); intrinsic);
+
+            simd_reduce(fx, v, None, ret, &|fx, _ty, a, b| fx.bcx.ins().fadd(a, b));
+        }
+
+        _ if intrinsic.starts_with("llvm.aarch64.neon.frintn.v") => {
+            intrinsic_args!(fx, args => (v); intrinsic);
+
+            simd_for_each_lane(fx, v, ret, &|fx, _lane_ty, _res_lane_ty, lane| {
+                fx.bcx.ins().nearest(lane)
+            });
+        }
+
         _ if intrinsic.starts_with("llvm.aarch64.neon.smaxv.i") => {
             intrinsic_args!(fx, args => (v); intrinsic);