diff options
| -rw-r--r-- | src/vendorcode/amd/pi/Lib/amdlib.c | 16 |
1 files changed, 11 insertions, 5 deletions
diff --git a/src/vendorcode/amd/pi/Lib/amdlib.c b/src/vendorcode/amd/pi/Lib/amdlib.c index 4c8a56dba8..03ca207987 100644 --- a/src/vendorcode/amd/pi/Lib/amdlib.c +++ b/src/vendorcode/amd/pi/Lib/amdlib.c @@ -381,11 +381,17 @@ LibAmdBitScanReverse ( IN UINT32 value ) { - UINTN Index; - for (Index = 31; Index >= 0; Index--){ - if (value & (1 << Index)) break; - } - return (UINT8) Index; + uint8_t bit = 31; + do { + if (value & (1 << 31)) + return bit; + + value <<= 1; + bit--; + + } while (value != 0); + + return 0xFF; /* Error code indicating no bit found */ } AMDLIB_OPTIMIZE |