bs3-cmn-MemCpy.c

Timestamp:

Mar 18, 2016 12:07:33 AM (9 years ago)

Author:

vboxsync

Message:

bs3kit: updates.

File:

trunk/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-MemCpy.c

-              r58666
+              r60088
 BS3_DECL(void BS3_FAR *) BS3_CMN_NM(Bs3MemCpy)(void BS3_FAR *pvDst, const void BS3_FAR *pvSrc, size_t cbToCopy)
+{
+#if 1
+    const size_t BS3_FAR   *pBigSrc = (const size_t BS3_FAR *)pvSrc;
+    size_t BS3_FAR         *pBigDst = (size_t *)pvDst;
+    size_t                  cBig = cbToCopy / sizeof(size_t);
+    while (cBig-- > 0)
+        *pBigDst++ = *pBigSrc++;
+    switch (cbToCopy % sizeof(size_t))
+    {
+#if TMPL_BITS >= 64
+        case 7: ((uint8_t BS3_FAR *)pBigDst)[6] = ((const uint8_t BS3_FAR *)pBigSrc)[6];
+        case 6: ((uint8_t BS3_FAR *)pBigDst)[5] = ((const uint8_t BS3_FAR *)pBigSrc)[5];
+        case 5: ((uint8_t BS3_FAR *)pBigDst)[4] = ((const uint8_t BS3_FAR *)pBigSrc)[4];
+        case 4: ((uint8_t BS3_FAR *)pBigDst)[3] = ((const uint8_t BS3_FAR *)pBigSrc)[3];
+#endif
+#if TMPL_BITS >= 32
+        case 3: ((uint8_t BS3_FAR *)pBigDst)[2] = ((const uint8_t BS3_FAR *)pBigSrc)[2];
+        case 2: ((uint8_t BS3_FAR *)pBigDst)[1] = ((const uint8_t BS3_FAR *)pBigSrc)[1];
+#endif
+        case 1: ((uint8_t BS3_FAR *)pBigDst)[0] = ((const uint8_t BS3_FAR *)pBigSrc)[0];
+        case 0:
+            break;
+    }
+#else
     size_t          cLargeRounds;
     BS3CPTRUNION    uSrc;
 …
         *uDst.pb++ = *uSrc.pb++;
+#endif
     return pvDst;
+}

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