Power operator via runtime library implementation

Signed-off-by: Mel <mel@rnrd.eu>

1 files changed, 13 insertions, 0 deletions

diff --git a/boot/transpile.c b/boot/transpile.c
index 0627bcb..9c94706 100644
--- a/boot/transpile.c
+++ b/boot/transpile.c
@@ -406,6 +406,19 @@ transpile_visit_expression_binary_operation(struct Visit* visit, struct Expressi
     TRANSPILE_PREAMBLE
 
     enum Binary_Operation op = expression->value.binary_operator.operation;
+
+    // c has no built-in power operator.
+    // we route the operation via our own runtime library `pow_integer` function,
+    // which performs fast exponentiation by squaring.
+    if (op == BINARY_POWER) {
+        TRANSPILE_WRITE("pow_integer(");
+        transpile_emit_expression(visit, expression->value.binary_operator.left_operand, 0);
+        TRANSPILE_WRITE(", ");
+        transpile_emit_expression(visit, expression->value.binary_operator.right_operand, 0);
+        TRANSPILE_WRITE(")");
+        return;
+    }
+
     uint my_precedence = binary_operation_precedence(op);
     uint parent = transpiler->expression_parent_precedence;
     bool needs_parens = my_precedence < parent;