AuroraSupport/AuroraRuntime
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[*] Count discontiguous bits in the win32 processor map

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This commit is contained in:
Reece Wilson 2021-10-16 00:15:13 +01:00
parent 5e0cc1ccfa
commit 586ec565e1
1 changed files with 15 additions and 4 deletions
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19
Source/HWInfo/CpuInfo.cpp
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@ -435,11 +435,22 @@ namespace Aurora::HWInfo
if (sysinfo[i].Relationship == RelationProcessorCore) if (sysinfo[i].Relationship == RelationProcessorCore)
{ {
gCpuInfo.cores++; gCpuInfo.cores++;
auto mask = sysinfo[i].ProcessorMask; auto mask = sysinfo[i].ProcessorMask;
unsigned long offset, count; unsigned long offset {}, tmp;
BitScanForward(&offset, mask); while (offset != (sizeof(offset) * 8 - 1))
BitScanForward(&count, ~(mask >> offset)); {
gCpuInfo.threads += count; // Count the index to a 1
if (BitScanForward(&tmp, mask >> offset) == 0) break; // mask was zero, end of scan
offset += tmp;
// Count the 1's by inverting the bitmap and counting to 1
BitScanForward(&tmp, ~(mask >> offset));
offset += tmp;
// Increment threads by the bits set in
gCpuInfo.threads += tmp;
}
} }
else if (sysinfo[i].Relationship == RelationProcessorPackage) else if (sysinfo[i].Relationship == RelationProcessorPackage)
{ {