tiny.simd.detectSpin

1pub fn detectSpin(disabled: u8) SpinType {2    if (comptime isX86()) {3        const leaf0 = cpuid(0, 0);4        if (comptime haveMonitorX()) {5            if (enabled(disabled, .monitor_x) and isAmd(leaf0)) {6                const extended = cpuid(0x8000_0000, 0);7                if (extended.eax >= 0x8000_0001) {8                    const features = cpuid(0x8000_0001, 0);9                    if (features.ecx & (@as(u32, 1) << 29) != 0) {10                        return .monitor_x;11                    }12                }13            }14        }15        if (comptime haveUMonitor()) {16            if (enabled(disabled, .u_monitor) and leaf0.eax >= 7) {17                const features = cpuid(7, 0);18                if (features.ecx & (@as(u32, 1) << 5) != 0) {19                    return .u_monitor;20                }21            }22        }23    }24    return .pause;25}

1pub const detectSpin = thread.detectSpin;