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std: Add fallback on pre-v6 ARM targets

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Thanks xackus for noticing the missing else branch.
This commit is contained in:
LemonBoy 2021-05-02 18:52:08 +02:00
parent 792cf925ec
commit a7f3e12d23
1 changed files with 3 additions and 1 deletions
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4
lib/std/Thread.zig
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@ -76,7 +76,9 @@ pub fn spinLoopHint() callconv(.Inline) void {
.arm, .armeb, .thumb, .thumbeb => {
// `yield` was introduced in v6k but are also available on v6m.
const can_yield = comptime std.Target.arm.featureSetHasAny(std.Target.current.cpu.features, .{ .has_v6k, .has_v6m });
if (can_yield) asm volatile ("yield" ::: "memory");
if (can_yield) asm volatile ("yield" ::: "memory")
// Fallback.
else asm volatile ("" ::: "memory");
},
.aarch64, .aarch64_be, .aarch64_32 => {
asm volatile ("isb" ::: "memory");