nv50/ir: print SHFL subops in debug mode

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>

src/gallium/drivers/nouveau/codegen/nv50_ir_print.cpp

@@ -210,6 +210,11 @@ static const char *subfmOpStr[] =
    "", "3d"
 };
 
+static const char *shflOpStr[] =
+{
+  "idx", "up", "down", "bfly"
+};
+
 static const char *DataTypeStr[] =
 {
    "-",
@@ -562,6 +567,10 @@ void Instruction::print() const
          if (subOp < ARRAY_SIZE(subfmOpStr))
             PRINT("%s ", subfmOpStr[subOp]);
          break;
+      case OP_SHFL:
+         if (subOp < ARRAY_SIZE(shflOpStr))
+            PRINT("%s ", shflOpStr[subOp]);
+         break;
       default:
          if (subOp)
             PRINT("(SUBOP:%u) ", subOp);