[clang] [llvm] [NVPTX] Add builtins and intrinsics for conversions of new FP types (PR #134345)

[Alex MacLean via cfe-commits]

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@@ -1944,6 +1944,62 @@ def : Pat<(int_nvvm_e5m2x2_to_f16x2_rn Int16Regs:$a),
 def : Pat<(int_nvvm_e5m2x2_to_f16x2_rn_relu Int16Regs:$a),
           (CVT_f16x2_e5m2x2 $a, CvtRN_RELU)>;
 
+def : Pat<(int_nvvm_ff_to_e2m3x2_rn f32:$a, f32:$b),
+          (CVT_e2m3x2_f32 $a, $b, CvtRN)>,
+      Requires<[hasPTX<86>, hasSM<100>, hasArchAccelFeatures]>;
+def : Pat<(int_nvvm_ff_to_e2m3x2_rn_relu f32:$a, f32:$b),
+          (CVT_e2m3x2_f32 $a, $b, CvtRN_RELU)>,
+      Requires<[hasPTX<86>, hasSM<100>, hasArchAccelFeatures]>;
+def : Pat<(int_nvvm_ff_to_e3m2x2_rn f32:$a, f32:$b),
+          (CVT_e3m2x2_f32 $a, $b, CvtRN)>,
+      Requires<[hasPTX<86>, hasSM<100>, hasArchAccelFeatures]>;
+def : Pat<(int_nvvm_ff_to_e3m2x2_rn_relu f32:$a, f32:$b),
+          (CVT_e3m2x2_f32 $a, $b, CvtRN_RELU)>,
+      Requires<[hasPTX<86>, hasSM<100>, hasArchAccelFeatures]>;
+
+def : Pat<(int_nvvm_e2m3x2_to_f16x2_rn Int16Regs:$a),
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AlexMaclean wrote:

Instead of using a Register class in the input pattern, use whatever type we expect this to be, in this case `i16` I assume.

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