zig/lib/compiler_rt/subdf3.zig
mlugg f26dda2117 all: migrate code to new cast builtin syntax
Most of this migration was performed automatically with `zig fmt`. There
were a few exceptions which I had to manually fix:

* `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten
* `@truncate`'s fixup is incorrect for vectors
* Test cases are not formatted, and their error locations change
2023-06-24 16:56:39 -07:00

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685 B
Zig

const common = @import("./common.zig");
pub const panic = common.panic;
comptime {
if (common.want_aeabi) {
@export(__aeabi_dsub, .{ .name = "__aeabi_dsub", .linkage = common.linkage, .visibility = common.visibility });
} else {
@export(__subdf3, .{ .name = "__subdf3", .linkage = common.linkage, .visibility = common.visibility });
}
}
fn __subdf3(a: f64, b: f64) callconv(.C) f64 {
const neg_b = @as(f64, @bitCast(@as(u64, @bitCast(b)) ^ (@as(u64, 1) << 63)));
return a + neg_b;
}
fn __aeabi_dsub(a: f64, b: f64) callconv(.AAPCS) f64 {
const neg_b = @as(f64, @bitCast(@as(u64, @bitCast(b)) ^ (@as(u64, 1) << 63)));
return a + neg_b;
}