diff --git a/build_system/src/test.rs b/build_system/src/test.rs
index df4ac85233b..5ad75384e5e 100644
--- a/build_system/src/test.rs
+++ b/build_system/src/test.rs
@@ -680,7 +680,15 @@ fn test_libcore(env: &Env, args: &TestArg) -> Result<(), String> {
     println!("[TEST] libcore");
     let path = get_sysroot_dir().join("sysroot_src/library/coretests");
     let _ = remove_dir_all(path.join("target"));
-    run_cargo_command(&[&"test"], Some(&path), env, args)?;
+    // TODO(antoyo): run in release mode when we fix the failures.
+    // TODO(antoyo): remove the --skip f16::test_total_cmp when this issue is fixed:
+    // https://github.com/rust-lang/rust/issues/141503
+    run_cargo_command(
+        &[&"test", &"--", &"--skip", &"f16::test_total_cmp"],
+        Some(&path),
+        env,
+        args,
+    )?;
     Ok(())
 }
 
diff --git a/libgccjit.version b/libgccjit.version
index d06646dacc3..f62154968d3 100644
--- a/libgccjit.version
+++ b/libgccjit.version
@@ -1 +1 @@
-8b194529188f9d3a98cc211caa805a5355bfa8f0
+04ce66d8c918de9273bd7101638ad8724edf5e21
diff --git a/patches/0001-Pin-compiler_builtins-to-0.1.160.patch b/patches/0001-Pin-compiler_builtins-to-0.1.160.patch
new file mode 100644
index 00000000000..39266e081ed
--- /dev/null
+++ b/patches/0001-Pin-compiler_builtins-to-0.1.160.patch
@@ -0,0 +1,39 @@
+From cdb3d407740e4f15c3746051f8ba89b8e74e99d3 Mon Sep 17 00:00:00 2001
+From: None <none@example.com>
+Date: Fri, 30 May 2025 13:46:22 -0400
+Subject: [PATCH] Pin compiler_builtins to 0.1.160
+
+---
+ library/alloc/Cargo.toml | 2 +-
+ library/std/Cargo.toml   | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/library/alloc/Cargo.toml b/library/alloc/Cargo.toml
+index 9d0d957..365c9dc 100644
+--- a/library/alloc/Cargo.toml
++++ b/library/alloc/Cargo.toml
+@@ -16,7 +16,7 @@ bench = false
+ 
+ [dependencies]
+ core = { path = "../core", public = true }
+-compiler_builtins = { version = "=0.1.159", features = ['rustc-dep-of-std'] }
++compiler_builtins = { version = "=0.1.160", features = ['rustc-dep-of-std'] }
+ 
+ [features]
+ compiler-builtins-mem = ['compiler_builtins/mem']
+diff --git a/library/std/Cargo.toml b/library/std/Cargo.toml
+index 4ff4895..31371f0 100644
+--- a/library/std/Cargo.toml
++++ b/library/std/Cargo.toml
+@@ -18,7 +18,7 @@ cfg-if = { version = "1.0", features = ['rustc-dep-of-std'] }
+ panic_unwind = { path = "../panic_unwind", optional = true }
+ panic_abort = { path = "../panic_abort" }
+ core = { path = "../core", public = true }
+-compiler_builtins = { version = "=0.1.159" }
++compiler_builtins = { version = "=0.1.160" }
+ unwind = { path = "../unwind" }
+ hashbrown = { version = "0.15", default-features = false, features = [
+     'rustc-dep-of-std',
+-- 
+2.49.0
+
diff --git a/rust-toolchain b/rust-toolchain
index a8cda28688c..bafe497a2a2 100644
--- a/rust-toolchain
+++ b/rust-toolchain
@@ -1,3 +1,3 @@
 [toolchain]
-channel = "nightly-2025-05-12"
+channel = "nightly-2025-05-21"
 components = ["rust-src", "rustc-dev", "llvm-tools-preview"]
diff --git a/src/attributes.rs b/src/attributes.rs
index 8779bb47ef0..bf0927dc590 100644
--- a/src/attributes.rs
+++ b/src/attributes.rs
@@ -2,8 +2,8 @@
 use gccjit::FnAttribute;
 use gccjit::Function;
 #[cfg(feature = "master")]
-use rustc_attr_parsing::InlineAttr;
-use rustc_attr_parsing::InstructionSetAttr;
+use rustc_attr_data_structures::InlineAttr;
+use rustc_attr_data_structures::InstructionSetAttr;
 #[cfg(feature = "master")]
 use rustc_middle::middle::codegen_fn_attrs::CodegenFnAttrFlags;
 #[cfg(feature = "master")]
diff --git a/src/builder.rs b/src/builder.rs
index 4e2163201fd..c7900ebcd6f 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -4,8 +4,8 @@ use std::convert::TryFrom;
 use std::ops::Deref;
 
 use gccjit::{
-    BinaryOp, Block, ComparisonOp, Context, Function, LValue, Location, RValue, ToRValue, Type,
-    UnaryOp,
+    BinaryOp, Block, ComparisonOp, Context, Function, FunctionType, LValue, Location, RValue,
+    ToRValue, Type, UnaryOp,
 };
 use rustc_abi as abi;
 use rustc_abi::{Align, HasDataLayout, Size, TargetDataLayout, WrappingRange};
@@ -765,7 +765,15 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
 
         #[cfg(feature = "master")]
         match self.cx.type_kind(a_type) {
-            TypeKind::Half | TypeKind::Float => {
+            TypeKind::Half => {
+                let fmodf = self.context.get_builtin_function("fmodf");
+                let f32_type = self.type_f32();
+                let a = self.context.new_cast(self.location, a, f32_type);
+                let b = self.context.new_cast(self.location, b, f32_type);
+                let result = self.context.new_call(self.location, fmodf, &[a, b]);
+                return self.context.new_cast(self.location, result, a_type);
+            }
+            TypeKind::Float => {
                 let fmodf = self.context.get_builtin_function("fmodf");
                 return self.context.new_call(self.location, fmodf, &[a, b]);
             }
@@ -774,8 +782,19 @@ impl<'a, 'gcc, 'tcx> BuilderMethods<'a, 'tcx> for Builder<'a, 'gcc, 'tcx> {
                 return self.context.new_call(self.location, fmod, &[a, b]);
             }
             TypeKind::FP128 => {
-                let fmodl = self.context.get_builtin_function("fmodl");
-                return self.context.new_call(self.location, fmodl, &[a, b]);
+                let f128_type = self.type_f128();
+                let fmodf128 = self.context.new_function(
+                    None,
+                    FunctionType::Extern,
+                    f128_type,
+                    &[
+                        self.context.new_parameter(None, f128_type, "a"),
+                        self.context.new_parameter(None, f128_type, "b"),
+                    ],
+                    "fmodf128",
+                    false,
+                );
+                return self.context.new_call(self.location, fmodf128, &[a, b]);
             }
             _ => (),
         }
diff --git a/src/callee.rs b/src/callee.rs
index c133ae4fcdd..c8130b7c010 100644
--- a/src/callee.rs
+++ b/src/callee.rs
@@ -106,7 +106,7 @@ pub fn get_fn<'gcc, 'tcx>(cx: &CodegenCx<'gcc, 'tcx>, instance: Instance<'tcx>)
                 // This is a monomorphization of a generic function.
                 if !(cx.tcx.sess.opts.share_generics()
                     || tcx.codegen_fn_attrs(instance_def_id).inline
-                        == rustc_attr_parsing::InlineAttr::Never)
+                        == rustc_attr_data_structures::InlineAttr::Never)
                 {
                     // When not sharing generics, all instances are in the same
                     // crate and have hidden visibility.
diff --git a/src/common.rs b/src/common.rs
index cfa951ddf4b..65f4788d902 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -237,14 +237,15 @@ impl<'gcc, 'tcx> ConstCodegenMethods for CodegenCx<'gcc, 'tcx> {
 
                 // FIXME(antoyo): there's some issues with using the u128 code that follows, so hard-code
                 // the paths for floating-point values.
-                if ty == self.float_type {
+                // TODO: Remove this code?
+                /*if ty == self.float_type {
                     return self
                         .context
                         .new_rvalue_from_double(ty, f32::from_bits(data as u32) as f64);
                 }
                 if ty == self.double_type {
                     return self.context.new_rvalue_from_double(ty, f64::from_bits(data as u64));
-                }
+                }*/
 
                 let value = self.const_uint_big(self.type_ix(bitsize), data);
                 let bytesize = layout.size(self).bytes();
diff --git a/src/int.rs b/src/int.rs
index 9b5b0fde6e2..fed96e5eb8c 100644
--- a/src/int.rs
+++ b/src/int.rs
@@ -915,7 +915,7 @@ impl<'gcc, 'tcx> CodegenCx<'gcc, 'tcx> {
         let name_suffix = match self.type_kind(dest_typ) {
             TypeKind::Float => "tisf",
             TypeKind::Double => "tidf",
-            TypeKind::FP128 => "tixf",
+            TypeKind::FP128 => "titf",
             kind => panic!("cannot cast a non-native integer to type {:?}", kind),
         };
         let sign = if signed { "" } else { "un" };
diff --git a/src/intrinsic/mod.rs b/src/intrinsic/mod.rs
index 4e5018ae011..acecab35d72 100644
--- a/src/intrinsic/mod.rs
+++ b/src/intrinsic/mod.rs
@@ -160,6 +160,95 @@ fn get_simple_function<'gcc, 'tcx>(
     ))
 }
 
+fn get_simple_function_f128<'gcc, 'tcx>(
+    cx: &CodegenCx<'gcc, 'tcx>,
+    name: Symbol,
+) -> Option<Function<'gcc>> {
+    if !cx.supports_f128_type {
+        return None;
+    }
+
+    let f128_type = cx.type_f128();
+    let func_name = match name {
+        sym::ceilf128 => "ceilf128",
+        sym::floorf128 => "floorf128",
+        sym::truncf128 => "truncf128",
+        sym::roundf128 => "roundf128",
+        sym::round_ties_even_f128 => "roundevenf128",
+        sym::sqrtf128 => "sqrtf128",
+        _ => return None,
+    };
+    Some(cx.context.new_function(
+        None,
+        FunctionType::Extern,
+        f128_type,
+        &[cx.context.new_parameter(None, f128_type, "a")],
+        func_name,
+        false,
+    ))
+}
+
+fn get_simple_function_f128_2args<'gcc, 'tcx>(
+    cx: &CodegenCx<'gcc, 'tcx>,
+    name: Symbol,
+) -> Option<Function<'gcc>> {
+    if !cx.supports_f128_type {
+        return None;
+    }
+
+    let f128_type = cx.type_f128();
+    let func_name = match name {
+        sym::maxnumf128 => "fmaxf128",
+        sym::minnumf128 => "fminf128",
+        _ => return None,
+    };
+    Some(cx.context.new_function(
+        None,
+        FunctionType::Extern,
+        f128_type,
+        &[
+            cx.context.new_parameter(None, f128_type, "a"),
+            cx.context.new_parameter(None, f128_type, "b"),
+        ],
+        func_name,
+        false,
+    ))
+}
+
+fn f16_builtin<'gcc, 'tcx>(
+    cx: &CodegenCx<'gcc, 'tcx>,
+    name: Symbol,
+    args: &[OperandRef<'tcx, RValue<'gcc>>],
+) -> RValue<'gcc> {
+    let f32_type = cx.type_f32();
+    let builtin_name = match name {
+        sym::ceilf16 => "__builtin_ceilf",
+        sym::floorf16 => "__builtin_floorf",
+        sym::fmaf16 => "fmaf",
+        sym::maxnumf16 => "__builtin_fmaxf",
+        sym::minnumf16 => "__builtin_fminf",
+        sym::powf16 => "__builtin_powf",
+        sym::powif16 => {
+            let func = cx.context.get_builtin_function("__builtin_powif");
+            let arg0 = cx.context.new_cast(None, args[0].immediate(), f32_type);
+            let args = [arg0, args[1].immediate()];
+            let result = cx.context.new_call(None, func, &args);
+            return cx.context.new_cast(None, result, cx.type_f16());
+        }
+        sym::roundf16 => "__builtin_roundf",
+        sym::round_ties_even_f16 => "__builtin_rintf",
+        sym::sqrtf16 => "__builtin_sqrtf",
+        sym::truncf16 => "__builtin_truncf",
+        _ => unreachable!(),
+    };
+
+    let func = cx.context.get_builtin_function(builtin_name);
+    let args: Vec<_> =
+        args.iter().map(|arg| cx.context.new_cast(None, arg.immediate(), f32_type)).collect();
+    let result = cx.context.new_call(None, func, &args);
+    cx.context.new_cast(None, result, cx.type_f16())
+}
+
 impl<'a, 'gcc, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tcx> {
     fn codegen_intrinsic_call(
         &mut self,
@@ -188,7 +277,9 @@ impl<'a, 'gcc, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tc
         let result = PlaceRef::new_sized(llresult, fn_abi.ret.layout);
 
         let simple = get_simple_intrinsic(self, name);
-        let simple_func = get_simple_function(self, name);
+        let simple_func = get_simple_function(self, name)
+            .or_else(|| get_simple_function_f128(self, name))
+            .or_else(|| get_simple_function_f128_2args(self, name));
 
         // FIXME(tempdragon): Re-enable `clippy::suspicious_else_formatting` if the following issue is solved:
         // https://github.com/rust-lang/rust-clippy/issues/12497
@@ -211,17 +302,55 @@ impl<'a, 'gcc, 'tcx> IntrinsicCallBuilderMethods<'tcx> for Builder<'a, 'gcc, 'tc
                     &args.iter().map(|arg| arg.immediate()).collect::<Vec<_>>(),
                 )
             }
-            sym::fmaf16 => {
-                // TODO(antoyo): use the correct builtin for f16.
-                let func = self.cx.context.get_builtin_function("fmaf");
-                let args: Vec<_> = args
-                    .iter()
-                    .map(|arg| {
-                        self.cx.context.new_cast(self.location, arg.immediate(), self.cx.type_f32())
-                    })
-                    .collect();
-                let result = self.cx.context.new_call(self.location, func, &args);
-                self.cx.context.new_cast(self.location, result, self.cx.type_f16())
+            sym::ceilf16
+            | sym::floorf16
+            | sym::fmaf16
+            | sym::maxnumf16
+            | sym::minnumf16
+            | sym::powf16
+            | sym::powif16
+            | sym::roundf16
+            | sym::round_ties_even_f16
+            | sym::sqrtf16
+            | sym::truncf16 => f16_builtin(self, name, args),
+            sym::fmaf128 => {
+                let f128_type = self.cx.type_f128();
+                let func = self.cx.context.new_function(
+                    None,
+                    FunctionType::Extern,
+                    f128_type,
+                    &[
+                        self.cx.context.new_parameter(None, f128_type, "a"),
+                        self.cx.context.new_parameter(None, f128_type, "b"),
+                        self.cx.context.new_parameter(None, f128_type, "c"),
+                    ],
+                    "fmaf128",
+                    false,
+                );
+                self.cx.context.new_call(
+                    self.location,
+                    func,
+                    &args.iter().map(|arg| arg.immediate()).collect::<Vec<_>>(),
+                )
+            }
+            sym::powif128 => {
+                let f128_type = self.cx.type_f128();
+                let func = self.cx.context.new_function(
+                    None,
+                    FunctionType::Extern,
+                    f128_type,
+                    &[
+                        self.cx.context.new_parameter(None, f128_type, "a"),
+                        self.cx.context.new_parameter(None, self.int_type, "b"),
+                    ],
+                    "__powitf2",
+                    false,
+                );
+                self.cx.context.new_call(
+                    self.location,
+                    func,
+                    &args.iter().map(|arg| arg.immediate()).collect::<Vec<_>>(),
+                )
             }
             sym::is_val_statically_known => {
                 let a = args[0].immediate();
diff --git a/src/lib.rs b/src/lib.rs
index 6e2a50d745a..66e9ce4627c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -37,7 +37,7 @@ extern crate tracing;
 extern crate rustc_abi;
 extern crate rustc_apfloat;
 extern crate rustc_ast;
-extern crate rustc_attr_parsing;
+extern crate rustc_attr_data_structures;
 extern crate rustc_codegen_ssa;
 extern crate rustc_data_structures;
 extern crate rustc_errors;
@@ -521,13 +521,16 @@ fn target_config(sess: &Session, target_info: &LockedTargetInfo) -> TargetConfig
     let target_features = f(false);
     let unstable_target_features = f(true);
 
+    let has_reliable_f16 = target_info.supports_target_dependent_type(CType::Float16);
+    let has_reliable_f128 = target_info.supports_target_dependent_type(CType::Float128);
+
     TargetConfig {
         target_features,
         unstable_target_features,
         // There are no known bugs with GCC support for f16 or f128
-        has_reliable_f16: true,
-        has_reliable_f16_math: true,
-        has_reliable_f128: true,
-        has_reliable_f128_math: true,
+        has_reliable_f16,
+        has_reliable_f16_math: has_reliable_f16,
+        has_reliable_f128,
+        has_reliable_f128_math: has_reliable_f128,
     }
 }