diff --git a/src/etc/platform-intrinsics/powerpc.json b/src/etc/platform-intrinsics/powerpc.json
index 34a4dea7744..32648c96e4c 100644
--- a/src/etc/platform-intrinsics/powerpc.json
+++ b/src/etc/platform-intrinsics/powerpc.json
@@ -4,7 +4,8 @@
     "llvm_prefix": "llvm.ppc.altivec.",
     "number_info": {
         "unsigned": {},
-        "signed": {}
+        "signed": {},
+        "float": {}
     },
     "width_info": {
         "128": { "width": "" }
@@ -23,6 +24,13 @@
             "llvm": "vmhraddshs",
             "ret": "s16",
             "args": ["0", "0", "0"]
+        },
+        {
+            "intrinsic": "cmpb",
+            "width": [128],
+            "llvm": "vcmpbfp",
+            "ret": "s32",
+            "args": ["f32", "f32"]
         }
     ]
 }
diff --git a/src/librustc_platform_intrinsics/powerpc.rs b/src/librustc_platform_intrinsics/powerpc.rs
index 90e95ec6ae1..e2c5a203495 100644
--- a/src/librustc_platform_intrinsics/powerpc.rs
+++ b/src/librustc_platform_intrinsics/powerpc.rs
@@ -32,6 +32,11 @@ pub fn find(name: &str) -> Option<Intrinsic> {
             output: &::I16x8,
             definition: Named("llvm.ppc.altivec.vmhraddshs")
         },
+        "_vec_cmpb" => Intrinsic {
+            inputs: { static INPUTS: [&'static Type; 2] = [&::F32x4, &::F32x4]; &INPUTS },
+            output: &::I32x4,
+            definition: Named("llvm.ppc.altivec.vcmpbfp")
+        },
         _ => return None,
     })
 }