[clang] [llvm] [NVPTX] Add intrinsics for cvt .f6x2 and .ue8m0x2 variants (PR #134345)

[Durgadoss R via llvm-commits]

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@@ -1548,6 +1548,45 @@ let TargetPrefix = "nvvm" in {
       Intrinsic<[llvm_v2f16_ty], [llvm_i16_ty], [IntrNoMem, IntrNoCallback]>;
   def int_nvvm_e5m2x2_to_f16x2_rn_relu : ClangBuiltin<"__nvvm_e5m2x2_to_f16x2_rn_relu">,
       Intrinsic<[llvm_v2f16_ty], [llvm_i16_ty], [IntrNoMem, IntrNoCallback]>;
+  
+  def int_nvvm_ff_to_e2m3x2_rn : ClangBuiltin<"__nvvm_ff_to_e2m3x2_rn">,
+      Intrinsic<[llvm_i16_ty], [llvm_float_ty, llvm_float_ty], [IntrNoMem, IntrNoCallback]>;
+  def int_nvvm_ff_to_e2m3x2_rn_relu : ClangBuiltin<"__nvvm_ff_to_e2m3x2_rn_relu">,
+      Intrinsic<[llvm_i16_ty], [llvm_float_ty, llvm_float_ty], [IntrNoMem, IntrNoCallback]>;
+  def int_nvvm_ff_to_e3m2x2_rn : ClangBuiltin<"__nvvm_ff_to_e3m2x2_rn">,
+     Intrinsic<[llvm_i16_ty], [llvm_float_ty, llvm_float_ty], [IntrNoMem, IntrNoCallback]>;
+  def int_nvvm_ff_to_e3m2x2_rn_relu : ClangBuiltin<"__nvvm_ff_to_e3m2x2_rn_relu">,
+      Intrinsic<[llvm_i16_ty], [llvm_float_ty, llvm_float_ty], [IntrNoMem, IntrNoCallback]>;
+
+  def int_nvvm_e2m3x2_to_f16x2_rn : ClangBuiltin<"__nvvm_e2m3x2_to_f16x2_rn">,
+      Intrinsic<[llvm_v2f16_ty], [llvm_i16_ty], [IntrNoMem, IntrNoCallback]>;
+  def int_nvvm_e2m3x2_to_f16x2_rn_relu : ClangBuiltin<"__nvvm_e2m3x2_to_f16x2_rn_relu">,
+      Intrinsic<[llvm_v2f16_ty], [llvm_i16_ty], [IntrNoMem, IntrNoCallback]>;
+  def int_nvvm_e3m2x2_to_f16x2_rn : ClangBuiltin<"__nvvm_e3m2x2_to_f16x2_rn">,
+      Intrinsic<[llvm_v2f16_ty], [llvm_i16_ty], [IntrNoMem, IntrNoCallback]>;
+  def int_nvvm_e3m2x2_to_f16x2_rn_relu : ClangBuiltin<"__nvvm_e3m2x2_to_f16x2_rn_relu">,
+      Intrinsic<[llvm_v2f16_ty], [llvm_i16_ty], [IntrNoMem, IntrNoCallback]>;
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durga4github wrote:

optional:
We may combine this chunk with the e4m3/e5m2 conversions above since they all take an i16 and return v2f16, to reduce the verbosity. But this can be a separate NFC change.

https://github.com/llvm/llvm-project/pull/134345