50 lines
1.8 KiB
Zig
50 lines
1.8 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 compiler_rt = @import("../compiler_rt.zig");
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const symbol = compiler_rt.symbol;
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const comparef = @import("./comparef.zig");
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comptime {
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symbol(&__eqxf2, "__eqxf2");
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symbol(&__nexf2, "__nexf2");
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symbol(&__lexf2, "__lexf2");
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symbol(&__cmpxf2, "__cmpxf2");
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symbol(&__ltxf2, "__ltxf2");
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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 `__lexf2`, `__eqxf2`, `__nexf2`, `__cmpxf2`,
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/// and `__ltxf2`.
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fn __cmpxf2(a: f80, b: f80) callconv(.c) i32 {
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return @intFromEnum(comparef.cmp_f80(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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fn __lexf2(a: f80, b: f80) callconv(.c) i32 {
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return __cmpxf2(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, __eqxf2 and __nexf2 are defined
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/// to have the same return value.
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fn __eqxf2(a: f80, b: f80) callconv(.c) i32 {
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return __cmpxf2(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, __eqxf2 and __nexf2 are defined
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/// to have the same return value.
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fn __nexf2(a: f80, b: f80) callconv(.c) i32 {
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return __cmpxf2(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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fn __ltxf2(a: f80, b: f80) callconv(.c) i32 {
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return __cmpxf2(a, b);
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}
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