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loongarch: add __clear_cache builtin implementation (#21008)

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YANG Xudong 2024-08-10 16:24:01 +08:00 committed by GitHub
parent 54151428e5
commit 6d54f20c47
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1 changed files with 10 additions and 0 deletions
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lib/compiler_rt/clear_cache.zig
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@ -28,6 +28,10 @@ fn clear_cache(start: usize, end: usize) callconv(.C) void {
.aarch64, .aarch64_be => true,
else => false,
};
const loongarch64 = switch (arch) {
.loongarch64 => true,
else => false,
};
const mips = switch (arch) {
.mips, .mipsel, .mips64, .mips64el => true,
else => false,
@ -159,6 +163,12 @@ fn clear_cache(start: usize, end: usize) callconv(.C) void {
// On Darwin, sys_icache_invalidate() provides this functionality
sys_icache_invalidate(start, end - start);
exportIt();
} else if (os == .linux and loongarch64) {
// See: https://github.com/llvm/llvm-project/blob/cf54cae26b65fc3201eff7200ffb9b0c9e8f9a13/compiler-rt/lib/builtins/clear_cache.c#L94-L95
asm volatile (
\\ ibar 0
);
exportIt();
}
}