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0556a2ba53
Finishes cleanups that I started in other commits in this branch. * Use common.linkage for all exports instead of redoing the logic in each file. * Remove pointless `@setRuntimeSafety` calls. * Avoid redundantly exporting multiple versions of functions. For example, if PPC wants `ceilf128` then don't also export `ceilq`; similarly if ARM wants `__aeabi_ddiv` then don't also export `__divdf3`. * Use `inline` for helper functions instead of making inline calls at callsites.
43 lines
1.2 KiB
Zig
43 lines
1.2 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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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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if (common.want_aeabi) {
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@export(__aeabi_fneg, .{ .name = "__aeabi_fneg", .linkage = common.linkage });
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@export(__aeabi_dneg, .{ .name = "__aeabi_dneg", .linkage = common.linkage });
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} else {
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@export(__negsf2, .{ .name = "__negsf2", .linkage = common.linkage });
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@export(__negdf2, .{ .name = "__negdf2", .linkage = common.linkage });
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}
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}
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pub fn __negsf2(a: f32) callconv(.C) f32 {
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return negXf2(f32, a);
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}
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fn __aeabi_fneg(a: f32) callconv(.AAPCS) f32 {
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return negXf2(f32, a);
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}
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pub fn __negdf2(a: f64) callconv(.C) f64 {
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return negXf2(f64, a);
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}
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fn __aeabi_dneg(a: f64) callconv(.AAPCS) f64 {
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return negXf2(f64, a);
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}
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inline fn negXf2(comptime T: type, a: T) T {
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const Z = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
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const significandBits = std.math.floatMantissaBits(T);
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const exponentBits = std.math.floatExponentBits(T);
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const signBit = (@as(Z, 1) << (significandBits + exponentBits));
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return @bitCast(T, @bitCast(Z, a) ^ signBit);
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}
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