diff --git a/scripts/test_rustc_tests.sh b/scripts/test_rustc_tests.sh
index 7697571da95..9e5aefb7753 100755
--- a/scripts/test_rustc_tests.sh
+++ b/scripts/test_rustc_tests.sh
@@ -48,7 +48,6 @@ rm tests/ui/proc-macro/allowed-signatures.rs
 rm tests/ui/sse2.rs # cpuid not supported, so sse2 not detected
 rm tests/ui/intrinsics/const-eval-select-x86_64.rs # requires x86_64 vendor intrinsics
 rm tests/ui/simd/array-type.rs # "Index argument for `simd_insert` is not a constant"
-rm tests/ui/simd/intrinsic/float-math-pass.rs # simd_fcos unimplemented
 
 # exotic linkages
 rm tests/ui/issues/issue-33992.rs # unsupported linkages
diff --git a/src/intrinsics/simd.rs b/src/intrinsics/simd.rs
index a0ccf291c42..6741362e8b6 100644
--- a/src/intrinsics/simd.rs
+++ b/src/intrinsics/simd.rs
@@ -434,8 +434,36 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
             });
         }
 
-        sym::simd_round => {
-            intrinsic_args!(fx, args => (a); intrinsic);
+        sym::simd_fpow => {
+            intrinsic_args!(fx, args => (a, b); intrinsic);
+
+            if !a.layout().ty.is_simd() {
+                report_simd_type_validation_error(fx, intrinsic, span, a.layout().ty);
+                return;
+            }
+
+            simd_pair_for_each_lane(fx, a, b, ret, &|fx, lane_ty, _ret_lane_ty, a_lane, b_lane| {
+                match lane_ty.kind() {
+                    ty::Float(FloatTy::F32) => fx.lib_call(
+                        "powf",
+                        vec![AbiParam::new(types::F32), AbiParam::new(types::F32)],
+                        vec![AbiParam::new(types::F32)],
+                        &[a_lane, b_lane],
+                    )[0],
+                    ty::Float(FloatTy::F64) => fx.lib_call(
+                        "pow",
+                        vec![AbiParam::new(types::F64), AbiParam::new(types::F64)],
+                        vec![AbiParam::new(types::F64)],
+                        &[a_lane, b_lane],
+                    )[0],
+                    _ => unreachable!("{:?}", lane_ty),
+                }
+            });
+        }
+
+        sym::simd_fpowi => {
+            intrinsic_args!(fx, args => (a, exp); intrinsic);
+            let exp = exp.load_scalar(fx);
 
             if !a.layout().ty.is_simd() {
                 report_simd_type_validation_error(fx, intrinsic, span, a.layout().ty);
@@ -448,22 +476,71 @@ pub(super) fn codegen_simd_intrinsic_call<'tcx>(
                 ret,
                 &|fx, lane_ty, _ret_lane_ty, lane| match lane_ty.kind() {
                     ty::Float(FloatTy::F32) => fx.lib_call(
-                        "roundf",
+                        "__powisf2", // compiler-builtins
+                        vec![AbiParam::new(types::F32), AbiParam::new(types::I32)],
                         vec![AbiParam::new(types::F32)],
-                        vec![AbiParam::new(types::F32)],
-                        &[lane],
+                        &[lane, exp],
                     )[0],
                     ty::Float(FloatTy::F64) => fx.lib_call(
-                        "round",
+                        "__powidf2", // compiler-builtins
+                        vec![AbiParam::new(types::F64), AbiParam::new(types::I32)],
                         vec![AbiParam::new(types::F64)],
-                        vec![AbiParam::new(types::F64)],
-                        &[lane],
+                        &[lane, exp],
                     )[0],
                     _ => unreachable!("{:?}", lane_ty),
                 },
             );
         }
 
+        sym::simd_fsin
+        | sym::simd_fcos
+        | sym::simd_fexp
+        | sym::simd_fexp2
+        | sym::simd_flog
+        | sym::simd_flog10
+        | sym::simd_flog2
+        | sym::simd_round => {
+            intrinsic_args!(fx, args => (a); intrinsic);
+
+            if !a.layout().ty.is_simd() {
+                report_simd_type_validation_error(fx, intrinsic, span, a.layout().ty);
+                return;
+            }
+
+            simd_for_each_lane(fx, a, ret, &|fx, lane_ty, _ret_lane_ty, lane| {
+                let lane_ty = match lane_ty.kind() {
+                    ty::Float(FloatTy::F32) => types::F32,
+                    ty::Float(FloatTy::F64) => types::F64,
+                    _ => unreachable!("{:?}", lane_ty),
+                };
+                let name = match (intrinsic, lane_ty) {
+                    (sym::simd_fsin, types::F32) => "sinf",
+                    (sym::simd_fsin, types::F64) => "sin",
+                    (sym::simd_fcos, types::F32) => "cosf",
+                    (sym::simd_fcos, types::F64) => "cos",
+                    (sym::simd_fexp, types::F32) => "expf",
+                    (sym::simd_fexp, types::F64) => "exp",
+                    (sym::simd_fexp2, types::F32) => "exp2f",
+                    (sym::simd_fexp2, types::F64) => "exp2",
+                    (sym::simd_flog, types::F32) => "logf",
+                    (sym::simd_flog, types::F64) => "log",
+                    (sym::simd_flog10, types::F32) => "log10f",
+                    (sym::simd_flog10, types::F64) => "log10",
+                    (sym::simd_flog2, types::F32) => "log2f",
+                    (sym::simd_flog2, types::F64) => "log2",
+                    (sym::simd_round, types::F32) => "roundf",
+                    (sym::simd_round, types::F64) => "round",
+                    _ => unreachable!("{:?}", intrinsic),
+                };
+                fx.lib_call(
+                    name,
+                    vec![AbiParam::new(lane_ty)],
+                    vec![AbiParam::new(lane_ty)],
+                    &[lane],
+                )[0]
+            });
+        }
+
         sym::simd_fabs | sym::simd_fsqrt | sym::simd_ceil | sym::simd_floor | sym::simd_trunc => {
             intrinsic_args!(fx, args => (a); intrinsic);