儲存庫 vbox 的更動 62401

時間撮記:

2016-7-21 下午01:52:17 (8 年 以前)

作者:

vboxsync

訊息:

Added RTUInt128AssignNeg.

檔案:

• trunk/include/iprt/uint128.h (修改) (1 筆差異)

trunk/include/iprt/uint128.h

@@ -644 +644 @@
         pValue1Result->s.Hi--;
     pValue1Result->s.Hi -= pValue2->s.Hi;
+    return pValue1Result;
+}
+
+
+/**
+ * Negates a 128 number, storing the result in the input.
+ *
+ * @returns pValueResult.
+ * @param   pValueResult    The value to negate.
+ */
+DECLINLINE(PRTUINT128U) RTUInt128AssignNeg(PRTUINT128U pValueResult)
+{
+    /* result = 0 - value */
+    if (pValue1Result->s.Lo != 0)
+    {
+        pValue1Result->s.Lo = UINT64_C(0) - pValue1Result->s.Lo;
+        pValue1Result->s.Hi = UINT64_MAX  - pValue1Result->s.Hi;
+    }
+    else
+        pValue1Result->s.Hi = UINT64_C(0) - pValue1Result->s.Hi;
     return pValue1Result;
 }