diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 048ce98646..2bb39f7a7d 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -40,6 +40,7 @@ jobs:
     name: Test
     runs-on: ${{ matrix.target.os }}
     strategy:
+      fail-fast: false
       matrix:
         profile:
         - dev
diff --git a/README.md b/README.md
index 50905b49e8..ffa0da8067 100644
--- a/README.md
+++ b/README.md
@@ -14,3 +14,4 @@ The `std::simd` component now lives in the
 This repository is linked to `rust-lang/rust` as a [josh](https://josh-project.github.io/josh/intro.html) subtree. You can use the [rustc-josh-sync](https://github.com/rust-lang/josh-sync) tool to perform synchronization.
 
 You can find a guide on how to perform the synchronization [here](https://rustc-dev-guide.rust-lang.org/external-repos.html#synchronizing-a-josh-subtree).
+
diff --git a/crates/core_arch/src/s390x/vector.rs b/crates/core_arch/src/s390x/vector.rs
index 0ce720a924..9927ff2c62 100644
--- a/crates/core_arch/src/s390x/vector.rs
+++ b/crates/core_arch/src/s390x/vector.rs
@@ -114,6 +114,9 @@ unsafe extern "unadjusted" {
     #[link_name = "llvm.s390.vsumqf"] fn vsumqf(a: vector_unsigned_int, b: vector_unsigned_int) -> u128;
     #[link_name = "llvm.s390.vsumqg"] fn vsumqg(a: vector_unsigned_long_long, b: vector_unsigned_long_long) -> u128;
 
+    #[link_name = "llvm.s390.vaccq"] fn vaccq(a: u128, b: u128) -> u128;
+    #[link_name = "llvm.s390.vacccq"] fn vacccq(a: u128, b: u128, c: u128) -> u128;
+
     #[link_name = "llvm.s390.vscbiq"] fn vscbiq(a: u128, b: u128) -> u128;
     #[link_name = "llvm.s390.vsbiq"] fn vsbiq(a: u128, b: u128, c: u128) -> u128;
     #[link_name = "llvm.s390.vsbcbiq"] fn vsbcbiq(a: u128, b: u128, c: u128) -> u128;
@@ -4694,7 +4697,9 @@ pub unsafe fn vec_addc_u128(
 ) -> vector_unsigned_char {
     let a: u128 = transmute(a);
     let b: u128 = transmute(b);
-    transmute(a.overflowing_add(b).1 as u128)
+    // FIXME(llvm) https://github.com/llvm/llvm-project/pull/153557
+    // transmute(a.overflowing_add(b).1 as u128)
+    transmute(vaccq(a, b))
 }
 
 /// Vector Add With Carry unsigned 128-bits
@@ -4729,8 +4734,10 @@ pub unsafe fn vec_addec_u128(
     let a: u128 = transmute(a);
     let b: u128 = transmute(b);
     let c: u128 = transmute(c);
-    let (_d, carry) = a.carrying_add(b, c & 1 != 0);
-    transmute(carry as u128)
+    // FIXME(llvm) https://github.com/llvm/llvm-project/pull/153557
+    // let (_d, carry) = a.carrying_add(b, c & 1 != 0);
+    // transmute(carry as u128)
+    transmute(vacccq(a, b, c))
 }
 
 /// Vector Subtract with Carryout