Save 3 gas on swap1 (#132)

huff-language · Jul 10, 2023 · e1e98c1 · e1e98c1
1 parent 5b34c49
commit e1e98c1
Showing 1 changed file with 2 additions and 3 deletions.
diff --git a/src/tokens/ERC20.huff b/src/tokens/ERC20.huff
@@ -235,9 +235,8 @@
 /// @notice Transfers an amount of tokens from one address to another.
 #define macro _TRANSFER_GIVE_TO() = takes (3) returns (3) {
     // input stack: [value, from, to]
-    dup3                                                // [to, value, from, to]
-    dup2                                                // [value, to, value, from, to]
-    swap1                                               // [to, value, value, from, to]
+    dup1                                                // [value, value, from, to]
+    dup4                                                // [to, value, value, from, to]
     [BALANCE_SLOT] LOAD_ELEMENT_FROM_KEYS(0x00)         // [balance, value, value, from, to]
     add                                                 // [balance + value, value, from, to]
     dup4                                                // [to, balance + value, value, from, to]