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loongarch: add __clear_cache builtin implementation #21008

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merged 8 commits into from
Aug 10, 2024
Merged

loongarch: add __clear_cache builtin implementation #21008

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e7776a9
loongarch: 16 bit float is not supported on LLVM 18.
yxd-ym Aug 9, 2024
fe14f10
add clear cache.
yxd-ym Aug 9, 2024
d1a461a
add comment
yxd-ym Aug 9, 2024
944644b
disable lto for loongarch
yxd-ym Aug 9, 2024
58de99d
Add comment.
yxd-ym Aug 9, 2024
52b53b7
remove lto related logic
yxd-ym Aug 9, 2024
7e615f8
remove unneeded f16 related fix.
yxd-ym Aug 9, 2024
5b6ffff
fmt it.
yxd-ym Aug 10, 2024
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10 changes: 10 additions & 0 deletions lib/compiler_rt/clear_cache.zig
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Original file line number Diff line number Diff line change
Expand Up @@ -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,
Expand Down Expand Up @@ -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();
}
}

Expand Down