add literals limit test

src/include/migraphx/migraphx_float8.hpp

@@ -500,6 +500,17 @@ class NumericLimits<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::fp8>>
     {
         return migraphx_fp8::F8_Lowest<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::fp8>>();
     }
+
+    static MIGRAPHX_HIP_HOST_DEVICE migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::fp8> infinity()
+    {
+        if constexpr(MIGRAPHX_FP8_FNUZ)
+        {
+            return static_cast<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::fp8>>(
+                static_cast<uint8_t>(0x80));
+        }
+        return static_cast<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::fp8>>(
+            static_cast<uint8_t>(0x78));
+    }
 };
 
 template <>
@@ -532,6 +543,17 @@ class NumericLimits<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::bf8>>
     {
         return migraphx_fp8::F8_Lowest<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::bf8>>();
     }
+
+    static MIGRAPHX_HIP_HOST_DEVICE migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::bf8> infinity()
+    {
+        if constexpr(MIGRAPHX_FP8_FNUZ)
+        {
+            return static_cast<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::bf8>>(
+                static_cast<uint8_t>(0x80));
+        }
+        return static_cast<migraphx_fp8::hip_f8<migraphx_fp8::hip_f8_type::bf8>>(
+            static_cast<uint8_t>(0x7c));
+    }
 };
 /*
 // Use h/w intrinsic and optimized version when __gfx940__

src/include/migraphx/migraphx_hip_f8_impl.hpp

@@ -251,7 +251,7 @@ MIGRAPHX_HIP_HOST_DEVICE constexpr T cast_from_f8(uint8_t x)
     uint32_t ifNegInf = 0xFF800000;
     uint32_t ifNaN    = 0x7F800001;
     uint32_t ifNeg0   = 0x80000000;
-    // TODO: need to change T for half but right now it would never be called with half
+    // TODO: need to change T for half but right now it would never  called with half
     fInf    = detail::bit_cast<float>(ifInf);
     fNegInf = detail::bit_cast<float>(ifNegInf);
     fNaN    = detail::bit_cast<float>(ifNaN);

test/verify/test_literal_limits.cpp

@@ -22,6 +22,7 @@
  * THE SOFTWARE.
  */
 
+#include "migraphx/migraphx_float8.hpp"
 #include "verify_program.hpp"
 #include <migraphx/program.hpp>
 #include <migraphx/make_op.hpp>
@@ -52,3 +53,4 @@ template struct test_literal_limits<migraphx::shape::double_type, double>;
 template struct test_literal_limits<migraphx::shape::half_type, migraphx::half>;
 template struct test_literal_limits<migraphx::shape::int32_type, int32_t>;
 template struct test_literal_limits<migraphx::shape::int8_type, int8_t>;
+template struct test_literal_limits<migraphx::shape::float8_type, migraphx_fp8::fp8e4m3fnuz>;