[AMD] Skip fp8 data type tests on RDNA3 for test_conversions (#9895)

Navi3 does not support fp8 data type. This PR skip all the fp8 tests in
test_conversions for RDNA3.

---------

Co-authored-by: root <saeidrostami.github@gmail.com>

Author: saeid-rostami

python/test/unit/language/test_conversions.py

@@ -7,7 +7,9 @@
 import triton
 import triton.language as tl
 
-from triton._internal_testing import is_cuda, is_hip, is_hip_cdna2, is_hip_cdna3, is_hip_cdna4, is_hip_rdna4
+from triton._internal_testing import is_cuda, is_hip, is_hip_cdna2, is_hip_cdna3, is_hip_cdna4, is_hip_rdna3, is_hip_rdna4
+
+FP8_DTYPES = ('float8e5', 'float8e4b15', 'float8e4nv', 'float8e4b8', 'float8e5b16')
 
 
 def matching_int(dtype):
@@ -283,6 +285,8 @@ def test_typeconvert_upcast(src_dtype, dst_dtype, device):
                 launch_exhaustive_populate(getattr(tl, src_dtype), 0, 65536, False, 8, 0x7f, device=device)
             return
     elif is_hip():
+        if src_dtype in FP8_DTYPES and is_hip_rdna3():
+            pytest.skip(f"{src_dtype} is not supported on AMDGPU RDNA3")
         if  (src_dtype == 'float8e4nv' and not (is_hip_cdna3() or is_hip_cdna4())):
             pytest.skip(f"upcasting {src_dtype} to {dst_dtype} not supported in this architecture")
         if  src_dtype == 'float8e4b15':
@@ -343,6 +347,8 @@ def test_typeconvert_downcast(src_dtype, dst_dtype, rounding, max_repr, device):
             pytest.skip(f"{dst_dtype} downcast with RTNE rounding tests only supported on AMDGPU CDNA3")
 
     if is_hip():
+        if dst_dtype in FP8_DTYPES and is_hip_rdna3():
+            pytest.skip(f"{dst_dtype} is not supported on AMDGPU RDNA3")
         if dst_dtype in ('float8e4b8', 'float8e5b16') and (is_hip_cdna2() or is_hip_rdna4()):
             pytest.skip(f"{dst_dtype} is not supported on AMDGPU CDNA2 and RDNA4")
 
@@ -373,6 +379,9 @@ def test_typeconvert_downcast_clamping(src_dtype, dst_dtype, mode, device, round
         if dst_dtype in ('float8e5', 'float8e4nv') and rounding == 'rtne' and torch.cuda.get_device_capability(0) < (9, 0):
             pytest.skip(f"{dst_dtype} downcast with RTNE rounding tests only supported on NVGPU with compute capability 9.0+")
 
+    if dst_dtype in FP8_DTYPES and is_hip_rdna3():
+        pytest.skip(f"{dst_dtype} is not supported on AMDGPU RDNA3")
+
     if mode in ('inf', '-inf') and is_hip_rdna4():
         pytest.skip(f"clamping from `{mode}` is not supported on AMDGPU GFX12")