69 lines
2.8 KiB
Zig
69 lines
2.8 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 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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if (common.want_aeabi) {
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@export(__aeabi_dcmpeq, .{ .name = "__aeabi_dcmpeq", .linkage = common.linkage });
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@export(__aeabi_dcmplt, .{ .name = "__aeabi_dcmplt", .linkage = common.linkage });
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@export(__aeabi_dcmple, .{ .name = "__aeabi_dcmple", .linkage = common.linkage });
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} else {
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@export(__eqdf2, .{ .name = "__eqdf2", .linkage = common.linkage });
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@export(__nedf2, .{ .name = "__nedf2", .linkage = common.linkage });
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@export(__ledf2, .{ .name = "__ledf2", .linkage = common.linkage });
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@export(__cmpdf2, .{ .name = "__cmpdf2", .linkage = common.linkage });
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@export(__ltdf2, .{ .name = "__ltdf2", .linkage = common.linkage });
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}
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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 `__ledf2`, `__eqdf2`, `__nedf2`, `__cmpdf2`,
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/// and `__ltdf2`.
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fn __cmpdf2(a: f64, b: f64) callconv(.C) i32 {
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return @enumToInt(comparef.cmpf2(f64, 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 __ledf2(a: f64, b: f64) callconv(.C) i32 {
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return __cmpdf2(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, __eqdf2 and __nedf2 are defined
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/// to have the same return value.
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pub fn __eqdf2(a: f64, b: f64) callconv(.C) i32 {
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return __cmpdf2(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, __eqdf2 and __nedf2 are defined
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/// to have the same return value.
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pub fn __nedf2(a: f64, b: f64) callconv(.C) i32 {
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return __cmpdf2(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 __ltdf2(a: f64, b: f64) callconv(.C) i32 {
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return __cmpdf2(a, b);
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}
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fn __aeabi_dcmpeq(a: f64, b: f64) callconv(.AAPCS) i32 {
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return @boolToInt(comparef.cmpf2(f64, comparef.LE, a, b) == .Equal);
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}
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fn __aeabi_dcmplt(a: f64, b: f64) callconv(.AAPCS) i32 {
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return @boolToInt(comparef.cmpf2(f64, comparef.LE, a, b) == .Less);
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}
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fn __aeabi_dcmple(a: f64, b: f64) callconv(.AAPCS) i32 {
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return @boolToInt(comparef.cmpf2(f64, comparef.LE, a, b) != .Greater);
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}
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