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early-access version 2835

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This commit is contained in:
pineappleEA
2022-07-15 04:00:50 +02:00
parent 5c0ee5eba6
commit 0e7aef7e36
1173 changed files with 55320 additions and 18881 deletions
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16
src/common/x64/cpu_detect.cpp
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@@ -161,6 +161,22 @@ static CPUCaps Detect() {
caps.invariant_tsc = Common::Bit<8>(cpu_id[3]);
}
if (max_std_fn >= 0x15) {
__cpuid(cpu_id, 0x15);
caps.tsc_crystal_ratio_denominator = cpu_id[0];
caps.tsc_crystal_ratio_numerator = cpu_id[1];
caps.crystal_frequency = cpu_id[2];
// Some CPU models might not return a crystal frequency.
// The CPU model can be detected to use the values from turbostat
// https://github.com/torvalds/linux/blob/master/tools/power/x86/turbostat/turbostat.c#L5569
// but it's easier to just estimate the TSC tick rate for these cases.
if (caps.tsc_crystal_ratio_denominator) {
caps.tsc_frequency = static_cast<u64>(caps.crystal_frequency) *
caps.tsc_crystal_ratio_numerator /
caps.tsc_crystal_ratio_denominator;
}
}
if (max_std_fn >= 0x16) {
__cpuid(cpu_id, 0x16);
caps.base_frequency = cpu_id[0];

5
src/common/x64/cpu_detect.h
View File

@@ -30,6 +30,11 @@ struct CPUCaps {
u32 max_frequency;
u32 bus_frequency;
u32 tsc_crystal_ratio_denominator;
u32 tsc_crystal_ratio_numerator;
u32 crystal_frequency;
u64 tsc_frequency; // Derived from the above three values
bool sse : 1;
bool sse2 : 1;
bool sse3 : 1;