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fix: dispatch hashtree at runtime on every x86_64 target #13

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Merged
wemeetagain merged 1 commit into from
Sep 30, 2026
Merged

fix: dispatch hashtree at runtime on every x86_64 target #13

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8 changes: 5 additions & 3 deletions src/root.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -21,9 +21,11 @@ fn isSupported() bool {
return true;
}

if (builtin.cpu.arch == .x86_64 and (std.Target.x86.featureSetHasAll(builtin.cpu.features, .{ .avx512f, .avx512vl }) or
std.Target.x86.featureSetHasAll(builtin.cpu.features, .{ .avx2, .bmi2 }) or
std.Target.x86.featureSetHasAll(builtin.cpu.features, .{ .sha, .avx })))
// hashtree_hash selects SHA-NI, AVX-512, AVX2, AVX, SSE or generic C at runtime, so this must not depend on the
// compile-time CPU. The x86 backends are assembled on the same targets as in build.zig.
if (builtin.cpu.arch == .x86_64 and
builtin.os.tag != .macos and
!(builtin.os.tag == .windows and builtin.abi == .msvc))
{
return true;
}
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