diff --git a/library/stdarch/crates/core_arch/src/aarch64/neon/generated.rs b/library/stdarch/crates/core_arch/src/aarch64/neon/generated.rs
index 72fdceb77b13..c8ab0c34ede6 100644
--- a/library/stdarch/crates/core_arch/src/aarch64/neon/generated.rs
+++ b/library/stdarch/crates/core_arch/src/aarch64/neon/generated.rs
@@ -15297,6 +15297,21 @@ pub unsafe fn vrnd32xq_f32(a: float32x4_t) -> float32x4_t {
     vrnd32xq_f32_(a)
 }
 
+/// Floating-point round to 32-bit integer, using current rounding mode
+///
+/// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd32xq_f64)
+#[inline]
+#[target_feature(enable = "neon,frintts")]
+#[cfg_attr(test, assert_instr(frint32x))]
+pub unsafe fn vrnd32xq_f64(a: float64x2_t) -> float64x2_t {
+    #[allow(improper_ctypes)]
+    extern "unadjusted" {
+        #[cfg_attr(target_arch = "aarch64", link_name = "llvm.aarch64.neon.frint32x.v2f64")]
+        fn vrnd32xq_f64_(a: float64x2_t) -> float64x2_t;
+    }
+    vrnd32xq_f64_(a)
+}
+
 /// Floating-point round to 32-bit integer toward zero
 ///
 /// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd32z_f32)
@@ -15327,6 +15342,21 @@ pub unsafe fn vrnd32zq_f32(a: float32x4_t) -> float32x4_t {
     vrnd32zq_f32_(a)
 }
 
+/// Floating-point round to 32-bit integer toward zero
+///
+/// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd32zq_f64)
+#[inline]
+#[target_feature(enable = "neon,frintts")]
+#[cfg_attr(test, assert_instr(frint32z))]
+pub unsafe fn vrnd32zq_f64(a: float64x2_t) -> float64x2_t {
+    #[allow(improper_ctypes)]
+    extern "unadjusted" {
+        #[cfg_attr(target_arch = "aarch64", link_name = "llvm.aarch64.neon.frint32z.v2f64")]
+        fn vrnd32zq_f64_(a: float64x2_t) -> float64x2_t;
+    }
+    vrnd32zq_f64_(a)
+}
+
 /// Floating-point round to 64-bit integer, using current rounding mode
 ///
 /// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd64x_f32)
@@ -15357,6 +15387,21 @@ pub unsafe fn vrnd64xq_f32(a: float32x4_t) -> float32x4_t {
     vrnd64xq_f32_(a)
 }
 
+/// Floating-point round to 64-bit integer, using current rounding mode
+///
+/// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd64xq_f64)
+#[inline]
+#[target_feature(enable = "neon,frintts")]
+#[cfg_attr(test, assert_instr(frint64x))]
+pub unsafe fn vrnd64xq_f64(a: float64x2_t) -> float64x2_t {
+    #[allow(improper_ctypes)]
+    extern "unadjusted" {
+        #[cfg_attr(target_arch = "aarch64", link_name = "llvm.aarch64.neon.frint64x.v2f64")]
+        fn vrnd64xq_f64_(a: float64x2_t) -> float64x2_t;
+    }
+    vrnd64xq_f64_(a)
+}
+
 /// Floating-point round to 64-bit integer toward zero
 ///
 /// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd64z_f32)
@@ -15387,6 +15432,21 @@ pub unsafe fn vrnd64zq_f32(a: float32x4_t) -> float32x4_t {
     vrnd64zq_f32_(a)
 }
 
+/// Floating-point round to 64-bit integer toward zero
+///
+/// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vrnd64zq_f64)
+#[inline]
+#[target_feature(enable = "neon,frintts")]
+#[cfg_attr(test, assert_instr(frint64z))]
+pub unsafe fn vrnd64zq_f64(a: float64x2_t) -> float64x2_t {
+    #[allow(improper_ctypes)]
+    extern "unadjusted" {
+        #[cfg_attr(target_arch = "aarch64", link_name = "llvm.aarch64.neon.frint64z.v2f64")]
+        fn vrnd64zq_f64_(a: float64x2_t) -> float64x2_t;
+    }
+    vrnd64zq_f64_(a)
+}
+
 /// Transpose vectors
 ///
 /// [Arm's documentation](https://developer.arm.com/architectures/instruction-sets/intrinsics/vtrn1_s8)
@@ -26810,6 +26870,14 @@ mod test {
         assert_eq!(r, e);
     }
 
+    #[simd_test(enable = "neon,frintts")]
+    unsafe fn test_vrnd32xq_f64() {
+        let a: f64x2 = f64x2::new(1.1, 1.9);
+        let e: f64x2 = f64x2::new(1.0, 2.0);
+        let r: f64x2 = transmute(vrnd32xq_f64(transmute(a)));
+        assert_eq!(r, e);
+    }
+
     #[simd_test(enable = "neon,frintts")]
     unsafe fn test_vrnd32z_f32() {
         let a: f32x2 = f32x2::new(1.1, 1.9);
@@ -26826,6 +26894,14 @@ mod test {
         assert_eq!(r, e);
     }
 
+    #[simd_test(enable = "neon,frintts")]
+    unsafe fn test_vrnd32zq_f64() {
+        let a: f64x2 = f64x2::new(1.1, 1.9);
+        let e: f64x2 = f64x2::new(1.0, 1.0);
+        let r: f64x2 = transmute(vrnd32zq_f64(transmute(a)));
+        assert_eq!(r, e);
+    }
+
     #[simd_test(enable = "neon,frintts")]
     unsafe fn test_vrnd64x_f32() {
         let a: f32x2 = f32x2::new(1.1, 1.9);
@@ -26842,6 +26918,14 @@ mod test {
         assert_eq!(r, e);
     }
 
+    #[simd_test(enable = "neon,frintts")]
+    unsafe fn test_vrnd64xq_f64() {
+        let a: f64x2 = f64x2::new(1.1, 1.9);
+        let e: f64x2 = f64x2::new(1.0, 2.0);
+        let r: f64x2 = transmute(vrnd64xq_f64(transmute(a)));
+        assert_eq!(r, e);
+    }
+
     #[simd_test(enable = "neon,frintts")]
     unsafe fn test_vrnd64z_f32() {
         let a: f32x2 = f32x2::new(1.1, 1.9);
@@ -26858,6 +26942,14 @@ mod test {
         assert_eq!(r, e);
     }
 
+    #[simd_test(enable = "neon,frintts")]
+    unsafe fn test_vrnd64zq_f64() {
+        let a: f64x2 = f64x2::new(1.1, 1.9);
+        let e: f64x2 = f64x2::new(1.0, 1.0);
+        let r: f64x2 = transmute(vrnd64zq_f64(transmute(a)));
+        assert_eq!(r, e);
+    }
+
     #[simd_test(enable = "neon")]
     unsafe fn test_vtrn1_s8() {
         let a: i8x8 = i8x8::new(0, 2, 4, 6, 8, 10, 12, 14);
diff --git a/library/stdarch/crates/intrinsic-test/missing_aarch64.txt b/library/stdarch/crates/intrinsic-test/missing_aarch64.txt
index 85bdd6fb3934..33b7425d7c91 100644
--- a/library/stdarch/crates/intrinsic-test/missing_aarch64.txt
+++ b/library/stdarch/crates/intrinsic-test/missing_aarch64.txt
@@ -14,15 +14,16 @@ vbfmlaltq_laneq_f32
 vbfmmlaq_f32
 
 
-# Missing from both Clang and stdarch
-vrnd32x_f64
+# Implemented in stdarch, but missing in Clang.
 vrnd32xq_f64
-vrnd32z_f64
 vrnd32zq_f64
-vrnd64x_f64
 vrnd64xq_f64
-vrnd64z_f64
 vrnd64zq_f64
+# LLVM select error, and missing in Clang.
+vrnd32x_f64
+vrnd32z_f64
+vrnd64x_f64
+vrnd64z_f64
 
 # LLVM select error in debug builds
 #vqshlu_n_s16
diff --git a/library/stdarch/crates/stdarch-gen/neon.spec b/library/stdarch/crates/stdarch-gen/neon.spec
index b3ca359e6f99..9adc5829bf8b 100644
--- a/library/stdarch/crates/stdarch-gen/neon.spec
+++ b/library/stdarch/crates/stdarch-gen/neon.spec
@@ -7218,7 +7218,7 @@ target = frintts
 
 aarch64 = frint32x
 link-aarch64 = frint32x._EXT_
-generate float32x2_t, float32x4_t
+generate float32x2_t, float32x4_t, float64x2_t
 
 /// Floating-point round to 32-bit integer toward zero
 name = vrnd32z
@@ -7228,7 +7228,7 @@ target = frintts
 
 aarch64 = frint32z
 link-aarch64 = frint32z._EXT_
-generate float32x2_t, float32x4_t
+generate float32x2_t, float32x4_t, float64x2_t
 
 /// Floating-point round to 64-bit integer, using current rounding mode
 name = vrnd64x
@@ -7238,7 +7238,7 @@ target = frintts
 
 aarch64 = frint64x
 link-aarch64 = frint64x._EXT_
-generate float32x2_t, float32x4_t
+generate float32x2_t, float32x4_t, float64x2_t
 
 /// Floating-point round to 64-bit integer toward zero
 name = vrnd64z
@@ -7248,7 +7248,7 @@ target = frintts
 
 aarch64 = frint64z
 link-aarch64 = frint64z._EXT_
-generate float32x2_t, float32x4_t
+generate float32x2_t, float32x4_t, float64x2_t
 
 /// Transpose elements
 name = vtrn