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Fixed OP_BLOCK_COPY implementation based on ioquake3 code.

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This commit is contained in:
Artem Kharytoniuk 2016-07-05 00:05:49 +03:00
parent ee7b1bc5ad
commit e2e32bca15
1 changed files with 17 additions and 23 deletions
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40
code/qcommon/vm_interpreted.c
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@ -465,31 +465,25 @@ nextInstruction2:
programCounter += 1;
goto nextInstruction;
case OP_BLOCK_COPY:
{
int *src, *dest;
int i, count, srci, desti;
case OP_BLOCK_COPY:
{
int src = r0;
int dest = r1;
size_t n = r2;
count = r2;
// MrE: copy range check
srci = r0 & dataMask;
desti = r1 & dataMask;
count = ((srci + count) & dataMask) - srci;
count = ((desti + count) & dataMask) - desti;
if ((dest & dataMask) != dest
|| (src & dataMask) != src
|| ((dest + n) & dataMask) != dest + n
|| ((src + n) & dataMask) != src + n)
{
Com_Error(ERR_DROP, "OP_BLOCK_COPY out of range!");
}
src = (int *)&image[ r0&dataMask ];
dest = (int *)&image[ r1&dataMask ];
if ( ( (intptr_t)src | (intptr_t)dest | count ) & 3 ) {
Com_Error( ERR_DROP, "OP_BLOCK_COPY not dword aligned" );
}
count >>= 2;
for ( i = count-1 ; i>= 0 ; i-- ) {
dest[i] = src[i];
}
programCounter += 4;
opStack -= 2;
}
goto nextInstruction;
Com_Memcpy(vm->dataBase + dest, vm->dataBase + src, n);
programCounter += 4;
opStack -= 2;
}
goto nextInstruction;
case OP_CALL:
// save current program counter