kraid: Implement nir_op_iadd

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/41841>

src/panfrost/compiler/kraid/nir.rs

@@ -349,6 +349,14 @@ impl<'a> ShaderFromNir<'a> {
                     accum_op: CmpAccumOp::None,
                 });
             }
+            nir_op_iadd => {
+                b.push_op(OpIAdd {
+                    dst: dst.into(),
+                    dst_type: dst_type(NumericType::UnsignedInteger),
+                    saturate: false,
+                    srcs: [srcs(0), srcs(1)],
+                });
+            }
             _ => panic!("Unsupported ALU instruction: {}", alu.info().name()),
         }
     }

src/panfrost/compiler/kraid/ops.rs

@@ -179,6 +179,27 @@ impl fmt::Display for OpFCmp {
     }
 }
 
+#[repr(C)]
+#[derive(Clone, Opcode)]
+#[variants(dst_type in [S16, U16, V2S16, V2U16, S32, U32])]
+pub struct OpIAdd {
+    pub dst: Dst,
+    pub dst_type: DataType,
+    pub saturate: bool,
+    pub srcs: [Src; 2],
+}
+
+impl fmt::Display for OpIAdd {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let sat = if self.saturate { ".sat" } else { "" };
+        write!(
+            f,
+            "{} = IADD.{}{sat} {} {}",
+            &self.dst, self.dst_type, &self.srcs[0], &self.srcs[1],
+        )
+    }
+}
+
 #[repr(C)]
 #[derive(Clone, Opcode)]
 pub struct OpMkVecV2I8 {
@@ -244,6 +265,7 @@ pub enum Op {
     End(OpEnd),
     FAdd(OpFAdd),
     FCmp(OpFCmp),
+    IAdd(OpIAdd),
     MkVecV2I8(OpMkVecV2I8),
     MkVecV4I8(OpMkVecV4I8),
     Mov(OpMov),