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Reverted bad optimization -- (unsigned)Cluster2 may have the high 4 bits set 

with LONG_LAST_CLUSTER.


git-svn-id: https://svn.code.sf.net/p/freedos/svn/kernel/trunk@902 6ac86273-5f31-0410-b378-82cca8765d1b
This commit is contained in:
Bart Oldeman 2004-04-26 21:23:26 +00:00
parent 82e66852ee
commit bb7f10fafc
1 changed files with 3 additions and 1 deletions
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4
kernel/fattab.c
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@ -206,7 +206,9 @@ unsigned link_fat(struct dpb FAR * dpbp, CLUSTER Cluster1,
else
{
*fbp0 = (UBYTE)Cluster2;
*fbp1 = (*fbp1 & 0xf0) | (UBYTE)((unsigned)Cluster2 >> 8);
/* Cluster2 may be set to LONG_LAST_CLUSTER == 0x0FFFFFFFUL or 0xFFFF */
/* -- please don't optimize to (UBYTE)((unsigned)Cluster2 >> 8)! */
*fbp1 = (*fbp1 & 0xf0) | ((UBYTE)((unsigned)Cluster2 >> 8) & 0x0f);
}
}
else if (ISFAT16(dpbp))