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Remove stack dependency.

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This commit is contained in:
Bartosz Taudul 2020-02-09 17:13:44 +01:00
parent 78c2f68649
commit 99f2734d28
1 changed files with 25 additions and 6 deletions
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31
common/tracy_lz4.cpp
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@ -367,16 +367,35 @@ LZ4_memcpy_using_offset(BYTE* dstPtr, const BYTE* srcPtr, BYTE* dstEnd, const si
BYTE v[8];
switch(offset) {
case 1:
memset(v, *srcPtr, 8);
if(sizeof(void*) == 8) {
U64 m = *srcPtr * 0x0101010101010101;
memcpy(v, &m, 8);
} else {
memset(v, *srcPtr, 8);
}
goto copy_loop;
case 2:
memcpy(v, srcPtr, 2);
memcpy(&v[2], srcPtr, 2);
memcpy(&v[4], &v[0], 4);
if(sizeof(void*) == 8) {
U16 m;
memcpy(&m, srcPtr, 2);
U64 n = m * 0x0001000100010001;
memcpy(v, &n, 8);
} else {
memcpy(v, srcPtr, 2);
memcpy(&v[2], srcPtr, 2);
memcpy(&v[4], &v[0], 4);
}
goto copy_loop;
case 4:
memcpy(v, srcPtr, 4);
memcpy(&v[4], srcPtr, 4);
if(sizeof(void*) == 8) {
U32 m;
memcpy(&m, srcPtr, 4);
U64 n = m | (U64(m) << 32);
memcpy(v, &n, 8);
} else {
memcpy(v, srcPtr, 4);
memcpy(&v[4], srcPtr, 4);
}
goto copy_loop;
default:
LZ4_memcpy_using_offset_base(dstPtr, srcPtr, dstEnd, offset);