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`.
70 lines
2.0 KiB
Zig
70 lines
2.0 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const is_test = builtin.is_test;
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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(__cmpsi2, .{ .name = "__cmpsi2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__cmpdi2, .{ .name = "__cmpdi2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__cmpti2, .{ .name = "__cmpti2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__ucmpsi2, .{ .name = "__ucmpsi2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__ucmpdi2, .{ .name = "__ucmpdi2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__ucmpti2, .{ .name = "__ucmpti2", .linkage = common.linkage, .visibility = common.visibility });
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}
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// cmp - signed compare
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// - cmpXi2_generic for unoptimized little and big endian
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// ucmp - unsigned compare
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// - ucmpXi2_generic for unoptimized little and big endian
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// a < b => 0
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// a == b => 1
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// a > b => 2
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inline fn XcmpXi2(comptime T: type, a: T, b: T) i32 {
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var cmp1: i32 = 0;
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var cmp2: i32 = 0;
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if (a > b)
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cmp1 = 1;
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if (a < b)
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cmp2 = 1;
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return cmp1 - cmp2 + 1;
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}
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pub fn __cmpsi2(a: i32, b: i32) callconv(.C) i32 {
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return XcmpXi2(i32, a, b);
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}
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pub fn __cmpdi2(a: i64, b: i64) callconv(.C) i32 {
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return XcmpXi2(i64, a, b);
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}
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pub fn __cmpti2(a: i128, b: i128) callconv(.C) i32 {
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return XcmpXi2(i128, a, b);
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}
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pub fn __ucmpsi2(a: u32, b: u32) callconv(.C) i32 {
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return XcmpXi2(u32, a, b);
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}
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pub fn __ucmpdi2(a: u64, b: u64) callconv(.C) i32 {
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return XcmpXi2(u64, a, b);
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}
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pub fn __ucmpti2(a: u128, b: u128) callconv(.C) i32 {
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return XcmpXi2(u128, a, b);
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}
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test {
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_ = @import("cmpsi2_test.zig");
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_ = @import("cmpdi2_test.zig");
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_ = @import("cmpti2_test.zig");
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_ = @import("ucmpsi2_test.zig");
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_ = @import("ucmpdi2_test.zig");
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_ = @import("ucmpti2_test.zig");
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}
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