shadps4-emu/ext-cryptopp
1
0
Fork 0
mirror of https://github.com/shadps4-emu/ext-cryptopp.git synced 2024-11-26 19:30:21 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Cleanup xorbuf and VerifyBufsEqual (GH #1020)

Browse Source
This commit is contained in:
Jeffrey Walton 2021-03-17 17:38:54 -04:00
parent 17a1e8ade4
commit d4975aa608
No known key found for this signature in database
GPG Key ID: B36AB348921B1838
1 changed files with 30 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
misc.cpp
View File

@ -94,8 +94,23 @@ void xorbuf(byte *buf, const byte *mask, size_t count)
if (count == 0) return;
#endif
#if CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64
// word64 and stride of 8 slows things down on x86_64.
// word64 and stride of 8 makes no difference on ARM.
// word64 and stride of 16 benefits PowerPC.
while (count >= 16)
{
word64 r[2], b[2], m[2];
memcpy(&b, buf, 16); memcpy(&m, mask, 16);
r[0] = b[0] ^ m[0];
r[1] = b[1] ^ m[1];
memcpy(buf, &r, 16);
buf += 16; mask += 16; count -= 16;
}
#endif
while (count >= 4)
{
word32 r, b, m;
@ -152,8 +167,23 @@ void xorbuf(byte *output, const byte *input, const byte *mask, size_t count)
if (count == 0) return;
#endif
#if CRYPTOPP_BOOL_PPC32 || CRYPTOPP_BOOL_PPC64
// word64 and stride of 8 slows things down on x86_64.
// word64 and stride of 8 makes no difference on ARM.
// word64 and stride of 16 benefits PowerPC.
while (count >= 16)
{
word64 b[2], m[2], r[2];
memcpy(&b, input, 16); memcpy(&m, mask, 16);
r[0] = b[0] ^ m[0];
r[1] = b[1] ^ m[1];
memcpy(output, &r, 16);
output += 16; input += 16; mask += 16; count -= 16;
}
#endif
while (count >= 4)
{
word32 b, m, r;