zig/lib/compiler_rt/fixtfei.zig
Jacob Young b31a91bbef compiler-rt: compute correct integer sizes from bits at runtime
Also, accepting `align(1)` pointers ensures that the alignment is safety
checked rather than assumed.
2025-04-11 07:06:01 -04:00

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564 B
Zig

const std = @import("std");
const builtin = @import("builtin");
const common = @import("common.zig");
const bigIntFromFloat = @import("int_from_float.zig").bigIntFromFloat;
pub const panic = common.panic;
comptime {
@export(&__fixtfei, .{ .name = "__fixtfei", .linkage = common.linkage, .visibility = common.visibility });
}
pub fn __fixtfei(r: [*]u8, bits: usize, a: f128) callconv(.c) void {
const byte_size = std.zig.target.intByteSize(builtin.target, @intCast(bits));
return bigIntFromFloat(.signed, @ptrCast(@alignCast(r[0..byte_size])), a);
}