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better extract musl lib

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Brendan Hansknecht 2023-06-01 21:09:28 -07:00
parent 159f95aad1
commit 77624f627b
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GPG key ID: 0EA784685083E75B
5 changed files with 65 additions and 31 deletions
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12
crates/compiler/builtins/bitcode/src/libc.zig
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@ -1,7 +1,7 @@
const std = @import("std");
const builtin = @import("builtin");
const arch = builtin.cpu.arch;
const musl_memcpy = @import("libc/musl/memcpy.zig");
const musl = @import("libc/musl.zig");
const cpuid = @import("libc/cpuid.zig");
comptime {
@ -14,7 +14,7 @@ const Memcpy = fn (noalias [*]u8, noalias [*]const u8, len: usize) callconv(.C)
pub var memcpy_target: Memcpy = switch (arch) {
// TODO(): Switch to dispatch_memcpy once the surgical linker can support it.
// .x86_64 => dispatch_memcpy,
.x86_64 => musl_memcpy.musl_memcpy,
.x86_64 => musl.memcpy,
else => unreachable,
};
@ -47,9 +47,13 @@ fn dispatch_memcpy(noalias dest: [*]u8, noalias src: [*]const u8, len: usize) ca
switch (arch) {
.x86_64 => {
if (cpuid.supports_avx2()) {
memcpy_target = musl_memcpy.musl_memcpy;
if (cpuid.supports_prefetchw()) {
memcpy_target = musl.memcpy;
} else {
memcpy_target = musl.memcpy;
}
} else {
memcpy_target = musl_memcpy.musl_memcpy;
memcpy_target = musl.memcpy;
}
},
else => unreachable,