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30f2bb8464
When we're compiling compiler_rt for any WebAssembly target, we do not want to expose all the compiler-rt functions to the host runtime. By setting the visibility of all exports to `hidden`, we allow the linker to resolve the symbols during linktime, while not expose the functions to the host runtime. This also means the linker can properly garbage collect any compiler-rt function that does not get resolved. The symbol visibility for all target remains the same as before: `default`.
16 lines
403 B
Zig
16 lines
403 B
Zig
const std = @import("std");
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const common = @import("./common.zig");
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pub const panic = common.panic;
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comptime {
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@export(__subxf3, .{ .name = "__subxf3", .linkage = common.linkage, .visibility = common.visibility });
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}
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fn __subxf3(a: f80, b: f80) callconv(.C) f80 {
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var b_rep = std.math.break_f80(b);
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b_rep.exp ^= 0x8000;
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const neg_b = std.math.make_f80(b_rep);
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return a + neg_b;
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}
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