mirror of
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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`.
51 lines
2.2 KiB
Zig
51 lines
2.2 KiB
Zig
///! The quoted behavior definitions are from
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///! https://gcc.gnu.org/onlinedocs/gcc-12.1.0/gccint/Soft-float-library-routines.html#Soft-float-library-routines
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const common = @import("./common.zig");
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const comparef = @import("./comparef.zig");
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pub const panic = common.panic;
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comptime {
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@export(__eqhf2, .{ .name = "__eqhf2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__nehf2, .{ .name = "__nehf2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__lehf2, .{ .name = "__lehf2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__cmphf2, .{ .name = "__cmphf2", .linkage = common.linkage, .visibility = common.visibility });
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@export(__lthf2, .{ .name = "__lthf2", .linkage = common.linkage, .visibility = common.visibility });
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}
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/// "These functions calculate a <=> b. That is, if a is less than b, they return -1;
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/// if a is greater than b, they return 1; and if a and b are equal they return 0.
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/// If either argument is NaN they return 1..."
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///
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/// Note that this matches the definition of `__lehf2`, `__eqhf2`, `__nehf2`, `__cmphf2`,
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/// and `__lthf2`.
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fn __cmphf2(a: f16, b: f16) callconv(.C) i32 {
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return @enumToInt(comparef.cmpf2(f16, comparef.LE, a, b));
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}
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/// "These functions return a value less than or equal to zero if neither argument is NaN,
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/// and a is less than or equal to b."
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pub fn __lehf2(a: f16, b: f16) callconv(.C) i32 {
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return __cmphf2(a, b);
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}
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/// "These functions return zero if neither argument is NaN, and a and b are equal."
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/// Note that due to some kind of historical accident, __eqhf2 and __nehf2 are defined
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/// to have the same return value.
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pub fn __eqhf2(a: f16, b: f16) callconv(.C) i32 {
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return __cmphf2(a, b);
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}
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/// "These functions return a nonzero value if either argument is NaN, or if a and b are unequal."
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/// Note that due to some kind of historical accident, __eqhf2 and __nehf2 are defined
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/// to have the same return value.
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pub fn __nehf2(a: f16, b: f16) callconv(.C) i32 {
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return __cmphf2(a, b);
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}
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/// "These functions return a value less than zero if neither argument is NaN, and a
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/// is strictly less than b."
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pub fn __lthf2(a: f16, b: f16) callconv(.C) i32 {
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return __cmphf2(a, b);
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}
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