mirror of
https://github.com/ziglang/zig.git
synced 2024-11-27 23:52:31 +00:00
c50f33b111
The Zig LLVM backend emits calls to softfloat methods with the "standard compiler-rt" names. Rather than add complexity to the backend and have to synchronize the naming scheme across all targets, the simplest fix is just to export these symbols under both the "standard" and the platform-specific naming convention.
72 lines
2.2 KiB
Zig
72 lines
2.2 KiB
Zig
const std = @import("std");
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const builtin = @import("builtin");
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const math = std.math;
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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(__fminh, .{ .name = "__fminh", .linkage = common.linkage });
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@export(fminf, .{ .name = "fminf", .linkage = common.linkage });
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@export(fmin, .{ .name = "fmin", .linkage = common.linkage });
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@export(__fminx, .{ .name = "__fminx", .linkage = common.linkage });
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if (common.want_ppc_abi) {
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@export(fminq, .{ .name = "fminf128", .linkage = common.linkage });
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}
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@export(fminq, .{ .name = "fminq", .linkage = common.linkage });
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@export(fminl, .{ .name = "fminl", .linkage = common.linkage });
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}
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pub fn __fminh(x: f16, y: f16) callconv(.C) f16 {
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return generic_fmin(f16, x, y);
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}
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pub fn fminf(x: f32, y: f32) callconv(.C) f32 {
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return generic_fmin(f32, x, y);
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}
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pub fn fmin(x: f64, y: f64) callconv(.C) f64 {
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return generic_fmin(f64, x, y);
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}
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pub fn __fminx(x: f80, y: f80) callconv(.C) f80 {
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return generic_fmin(f80, x, y);
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}
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pub fn fminq(x: f128, y: f128) callconv(.C) f128 {
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return generic_fmin(f128, x, y);
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}
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pub fn fminl(x: c_longdouble, y: c_longdouble) callconv(.C) c_longdouble {
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switch (@typeInfo(c_longdouble).Float.bits) {
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16 => return __fminh(x, y),
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32 => return fminf(x, y),
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64 => return fmin(x, y),
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80 => return __fminx(x, y),
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128 => return fminq(x, y),
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else => @compileError("unreachable"),
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}
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}
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inline fn generic_fmin(comptime T: type, x: T, y: T) T {
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if (math.isNan(x))
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return y;
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if (math.isNan(y))
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return x;
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return if (x < y) x else y;
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}
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test "generic_fmin" {
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inline for ([_]type{ f32, f64, c_longdouble, f80, f128 }) |T| {
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const nan_val = math.nan(T);
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try std.testing.expect(math.isNan(generic_fmin(T, nan_val, nan_val)));
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try std.testing.expectEqual(@as(T, 1.0), generic_fmin(T, nan_val, 1.0));
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try std.testing.expectEqual(@as(T, 1.0), generic_fmin(T, 1.0, nan_val));
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try std.testing.expectEqual(@as(T, 1.0), generic_fmin(T, 1.0, 10.0));
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try std.testing.expectEqual(@as(T, -1.0), generic_fmin(T, 1.0, -1.0));
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}
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}
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