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https://github.com/ziglang/zig.git
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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.
56 lines
1.6 KiB
Zig
56 lines
1.6 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const arch = builtin.cpu.arch;
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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(__fabsh, .{ .name = "__fabsh", .linkage = common.linkage });
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@export(fabsf, .{ .name = "fabsf", .linkage = common.linkage });
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@export(fabs, .{ .name = "fabs", .linkage = common.linkage });
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@export(__fabsx, .{ .name = "__fabsx", .linkage = common.linkage });
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const fabsq_sym_name = if (common.want_ppc_abi) "fabsf128" else "fabsq";
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@export(fabsq, .{ .name = fabsq_sym_name, .linkage = common.linkage });
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@export(fabsl, .{ .name = "fabsl", .linkage = common.linkage });
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}
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pub fn __fabsh(a: f16) callconv(.C) f16 {
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return generic_fabs(a);
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}
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pub fn fabsf(a: f32) callconv(.C) f32 {
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return generic_fabs(a);
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}
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pub fn fabs(a: f64) callconv(.C) f64 {
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return generic_fabs(a);
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}
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pub fn __fabsx(a: f80) callconv(.C) f80 {
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return generic_fabs(a);
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}
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pub fn fabsq(a: f128) callconv(.C) f128 {
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return generic_fabs(a);
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}
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pub fn fabsl(x: c_longdouble) callconv(.C) c_longdouble {
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switch (@typeInfo(c_longdouble).Float.bits) {
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16 => return __fabsh(x),
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32 => return fabsf(x),
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64 => return fabs(x),
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80 => return __fabsx(x),
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128 => return fabsq(x),
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else => @compileError("unreachable"),
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}
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}
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inline fn generic_fabs(x: anytype) @TypeOf(x) {
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const T = @TypeOf(x);
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const TBits = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
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const float_bits = @bitCast(TBits, x);
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const remove_sign = ~@as(TBits, 0) >> 1;
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return @bitCast(T, float_bits & remove_sign);
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}
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