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Skip 128-bit cmpxchg test if CMPXCHG16B is not supported

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This commit is contained in:
FnControlOption 2021-08-08 09:21:30 -07:00
parent d19e1709b3
commit f91782c6d1
1 changed files with 20 additions and 12 deletions
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32
test/behavior/atomics.zig
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@ -75,20 +75,28 @@ test "cmpxchg with ptr" {
}
test "128-bit cmpxchg" {
var x: u128 = 1234;
if (@cmpxchgWeak(u128, &x, 99, 5678, .SeqCst, .SeqCst)) |x1| {
try expect(x1 == 1234);
} else {
@panic("cmpxchg should have failed");
}
try test_u128_cmpxchg();
comptime try test_u128_cmpxchg();
}
while (@cmpxchgWeak(u128, &x, 1234, 5678, .SeqCst, .SeqCst)) |x1| {
try expect(x1 == 1234);
}
try expect(x == 5678);
fn test_u128_cmpxchg() !void {
if (std.Target.current.cpu.arch != .x86_64) return error.SkipZigTest;
if (comptime !std.Target.x86.featureSetHas(std.Target.current.cpu.features, .cx16)) return error.SkipZigTest;
try expect(@cmpxchgStrong(u128, &x, 5678, 42, .SeqCst, .SeqCst) == null);
try expect(x == 42);
var x: u128 = 1234;
if (@cmpxchgWeak(u128, &x, 99, 5678, .SeqCst, .SeqCst)) |x1| {
try expect(x1 == 1234);
} else {
@panic("cmpxchg should have failed");
}
while (@cmpxchgWeak(u128, &x, 1234, 5678, .SeqCst, .SeqCst)) |x1| {
try expect(x1 == 1234);
}
try expect(x == 5678);
try expect(@cmpxchgStrong(u128, &x, 5678, 42, .SeqCst, .SeqCst) == null);
try expect(x == 42);
}
test "cmpxchg with ignored result" {