diff --git a/src/compiler/nir/nir_builder.h b/src/compiler/nir/nir_builder.h
index bfe27164539..b1051726663 100644
--- a/src/compiler/nir/nir_builder.h
+++ b/src/compiler/nir/nir_builder.h
@@ -740,6 +740,13 @@ nir_iand_imm(nir_builder *build, nir_ssa_def *x, uint64_t y)
    }
 }
 
+static inline nir_ssa_def *
+nir_test_mask(nir_builder *build, nir_ssa_def *x, uint64_t mask)
+{
+   assert(mask <= BITFIELD64_MASK(x->bit_size));
+   return nir_ine_imm(build, nir_iand_imm(build, x, mask), 0);
+}
+
 static inline nir_ssa_def *
 nir_ior_imm(nir_builder *build, nir_ssa_def *x, uint64_t y)
 {