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const builtin = @import("builtin");
const HwyTargets = @import("../targets.zig").Targets;
const linux = @import("linux.zig");
pub fn detect() i64 {
var t: HwyTargets = .{};
if (comptime builtin.os.tag != .linux) return @bitCast(t);
const AT_HWCAP: usize = 16;
const AT_HWCAP2: usize = 26;
const hwcap = linux.getauxval(AT_HWCAP);
const hwcap2 = linux.getauxval(AT_HWCAP2);
// From Linux arch/powerpc/include/uapi/asm/cputable.h
const PPC_FEATURE_HAS_ALTIVEC: usize = 0x10000000;
const PPC_FEATURE_HAS_VSX: usize = 0x00000080;
const PPC_FEATURE2_ARCH_2_07: usize = 0x80000000; // POWER8
const PPC_FEATURE2_VEC_CRYPTO: usize = 0x02000000;
const PPC_FEATURE2_ARCH_3_00: usize = 0x00800000; // POWER9
const PPC_FEATURE2_ARCH_3_1: usize = 0x00040000; // POWER10
const PPC_FEATURE2_MMA: usize = 0x00020000;
if (hwcap & PPC_FEATURE_HAS_ALTIVEC != 0 and
hwcap & PPC_FEATURE_HAS_VSX != 0 and
hwcap2 & PPC_FEATURE2_ARCH_2_07 != 0 and
hwcap2 & PPC_FEATURE2_VEC_CRYPTO != 0)
{
t.ppc8 = true;
if (hwcap2 & PPC_FEATURE2_ARCH_3_00 != 0) {
t.ppc9 = true;
if (hwcap2 & PPC_FEATURE2_ARCH_3_1 != 0 and
hwcap2 & PPC_FEATURE2_MMA != 0)
{
t.ppc10 = true;
}
}
}
return @bitCast(t);
}
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