[ignition] Use absolute values for jump offsets

src/interpreter/bytecode-array-writer.cc

Index: src/interpreter/bytecode-array-writer.cc
diff --git a/src/interpreter/bytecode-array-writer.cc b/src/interpreter/bytecode-array-writer.cc
index dd91564b16e4d1d7ec8b975d211567fc468ed370..10c9cc1b940e092afc8b4c3cebf4a2457a0be3f3 100644
--- a/src/interpreter/bytecode-array-writer.cc
+++ b/src/interpreter/bytecode-array-writer.cc
@@ -282,15 +282,13 @@ void BytecodeArrayWriter::EmitJump(BytecodeNode* node, BytecodeLabel* label) {
 
   if (label->is_bound()) {
     CHECK_GE(current_offset, label->offset());
-    CHECK_LE(current_offset, static_cast<size_t>(kMaxInt));
+    CHECK_LE(current_offset, static_cast<size_t>(kMaxUInt32));
     // Label has been bound already so this is a backwards jump.
-    size_t abs_delta = current_offset - label->offset();
-    int delta = -static_cast<int>(abs_delta);
-    OperandScale operand_scale = Bytecodes::ScaleForSignedOperand(delta);
+    uint32_t delta = static_cast<uint32_t>(current_offset - label->offset());
+    OperandScale operand_scale = Bytecodes::ScaleForUnsignedOperand(delta);
     if (operand_scale > OperandScale::kSingle) {
       // Adjust for scaling byte prefix for wide jump offset.
-      DCHECK_LE(delta, 0);
-      delta -= 1;
+      delta += 1;
     }
     DCHECK_EQ(Bytecode::kJumpLoop, node->bytecode());
     node->update_operand0(delta);