[AMD] Support libdevice.round (#7139)

Fixes triton-lang/triton#7135

Author: knwng

third_party/amd/language/hip/libdevice.py

@@ -473,3 +473,12 @@ def ilogb(arg0, _semantic=None):
             (core.dtype("fp32"), ): ("__ocml_ilogb_f32", core.dtype("int32")),
             (core.dtype("fp64"), ): ("__ocml_ilogb_f64", core.dtype("int32")),
         }, is_pure=True, _semantic=_semantic)
+
+
+@core.extern
+def round(arg0, _semantic=None):
+    return core.extern_elementwise(
+        "", "", [arg0], {
+            (core.dtype("fp32"), ): ("__ocml_round_f32", core.dtype("fp32")),
+            (core.dtype("fp64"), ): ("__ocml_round_f64", core.dtype("fp64")),
+        }, is_pure=True, _semantic=_semantic)