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Merge pull request #9535 from FnControlOption/128-bit-cmpxchg-test

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Re-enable 128-bit cmpxchg test
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Jakub Konka 2021-08-12 16:42:37 +02:00 committed by GitHub
commit 394d287778
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1 changed files with 24 additions and 20 deletions
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44
test/behavior/atomics.zig
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@ -74,26 +74,30 @@ test "cmpxchg with ptr" {
try expect(x == &data2);
}
// TODO this test is disabled until this issue is resolved:
// https://github.com/ziglang/zig/issues/2883
// otherwise cross compiling will result in:
// lld: error: undefined symbol: __sync_val_compare_and_swap_16
//test "128-bit cmpxchg" {
// var x: u128 align(16) = 1234; // TODO: https://github.com/ziglang/zig/issues/2987
// 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 "128-bit cmpxchg" {
try test_u128_cmpxchg();
comptime try test_u128_cmpxchg();
}
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;
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" {
var x: i32 = 1234;