ShuriZma
/
xenia-canary
mirror of https://github.com/xenia-canary/xenia-canary.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fixed 8-bit and 16-bit xe::lzcnt.

This commit is contained in:
gibbed 2015-05-28 12:16:19 -05:00
parent d1dbee2052
commit 3300945660
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
src/xenia/base/math.h
View File

@ -75,13 +75,13 @@ inline uint8_t lzcnt(uint8_t v) {
DWORD index; DWORD index;
DWORD mask = v; DWORD mask = v;
BOOLEAN is_nonzero = _BitScanReverse(&index, mask); BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
return static_cast<uint8_t>(is_nonzero ? int8_t(index - 24) ^ 0x7 : 8); return static_cast<uint8_t>(is_nonzero ? int8_t(index) ^ 0x7 : 8);
} }
inline uint8_t lzcnt(uint16_t v) { inline uint8_t lzcnt(uint16_t v) {
DWORD index; DWORD index;
DWORD mask = v; DWORD mask = v;
BOOLEAN is_nonzero = _BitScanReverse(&index, mask); BOOLEAN is_nonzero = _BitScanReverse(&index, mask);
return static_cast<uint8_t>(is_nonzero ? int8_t(index - 16) ^ 0xF : 16); return static_cast<uint8_t>(is_nonzero ? int8_t(index) ^ 0xF : 16);
} }
inline uint8_t lzcnt(uint32_t v) { inline uint8_t lzcnt(uint32_t v) {
DWORD index; DWORD index;