zig

commit a7f3e12d23aa59ef3a6d78b1eb10a2a0d688906a (tree)
parent 792cf925ec170ddcb42a2d78ab8f464642e92b17
Author: LemonBoy <thatlemon@gmail.com>
Date:   Sun,  2 May 2021 18:52:08 +0200

std: Add fallback on pre-v6 ARM targets

Thanks xackus for noticing the missing else branch.

Diffstat:
M
lib/std/Thread.zig
 | 
4
+++-

1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/lib/std/Thread.zig b/lib/std/Thread.zig
@@ -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");