zig/lib/compiler_rt/subtf3.zig
Andrew Kelley 74608293af compiler_rt: common -> compiler_rt
use the "symbol" helper function in all exports

move all declarations from common.zig to compiler_rt.zig

flatten the tree structure somewhat (move contents of tiny files into
parent files)

No functional changes.
2026-02-09 20:03:15 -08:00

25 lines
685 B
Zig

const compiler_rt = @import("../compiler_rt.zig");
const symbol = compiler_rt.symbol;
const addf3 = @import("./addf3.zig").addf3;
comptime {
if (compiler_rt.want_ppc_abi) {
symbol(&__subtf3, "__subkf3");
} else if (compiler_rt.want_sparc_abi) {
symbol(&_Qp_sub, "_Qp_sub");
}
symbol(&__subtf3, "__subtf3");
}
pub fn __subtf3(a: f128, b: f128) callconv(.c) f128 {
return sub(a, b);
}
fn _Qp_sub(c: *f128, a: *const f128, b: *const f128) callconv(.c) void {
c.* = sub(a.*, b.*);
}
inline fn sub(a: f128, b: f128) f128 {
const neg_b = @as(f128, @bitCast(@as(u128, @bitCast(b)) ^ (@as(u128, 1) << 127)));
return addf3(f128, a, neg_b);
}