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https://codeberg.org/ziglang/zig.git
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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`.
21 lines
665 B
Zig
21 lines
665 B
Zig
const common = @import("./common.zig");
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pub const panic = common.panic;
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comptime {
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if (common.want_aeabi) {
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@export(__aeabi_fsub, .{ .name = "__aeabi_fsub", .linkage = common.linkage, .visibility = common.visibility });
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} else {
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@export(__subsf3, .{ .name = "__subsf3", .linkage = common.linkage, .visibility = common.visibility });
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}
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}
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fn __subsf3(a: f32, b: f32) callconv(.C) f32 {
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const neg_b = @bitCast(f32, @bitCast(u32, b) ^ (@as(u32, 1) << 31));
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return a + neg_b;
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}
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fn __aeabi_fsub(a: f32, b: f32) callconv(.AAPCS) f32 {
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const neg_b = @bitCast(f32, @bitCast(u32, b) ^ (@as(u32, 1) << 31));
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return a + neg_b;
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}
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