Transpile 7bce2b72

contracts/utils/math/SignedMathUpgradeable.sol

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: MIT
+// OpenZeppelin Contracts (last updated v4.5.0-rc.0) (utils/math/SignedMath.sol)
+
+pragma solidity ^0.8.0;
+
+/**
+ * @dev Standard signed math utilities missing in the Solidity language.
+ */
+library SignedMathUpgradeable {
+    /**
+     * @dev Returns the largest of two signed numbers.
+     */
+    function max(int256 a, int256 b) internal pure returns (int256) {
+        return a >= b ? a : b;
+    }
+
+    /**
+     * @dev Returns the smallest of two signed numbers.
+     */
+    function min(int256 a, int256 b) internal pure returns (int256) {
+        return a < b ? a : b;
+    }
+
+    /**
+     * @dev Returns the average of two signed numbers without overflow.
+     * The result is rounded towards zero.
+     */
+    function average(int256 a, int256 b) internal pure returns (int256) {
+        // Formula from the book "Hacker's Delight"
+        int256 x = (a & b) + ((a ^ b) >> 1);
+        return x + (int256(uint256(x) >> 255) & (a ^ b));
+    }
+}