mirror of
https://github.com/ziglang/zig.git
synced 2024-11-27 15:42:49 +00:00
f26dda2117
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
42 lines
1.1 KiB
Zig
42 lines
1.1 KiB
Zig
const std = @import("std");
|
|
const builtin = @import("builtin");
|
|
const udivmod = @import("udivmod.zig").udivmod;
|
|
const arch = builtin.cpu.arch;
|
|
const common = @import("common.zig");
|
|
|
|
pub const panic = common.panic;
|
|
|
|
comptime {
|
|
if (common.want_windows_v2u64_abi) {
|
|
@export(__divti3_windows_x86_64, .{ .name = "__divti3", .linkage = common.linkage, .visibility = common.visibility });
|
|
} else {
|
|
@export(__divti3, .{ .name = "__divti3", .linkage = common.linkage, .visibility = common.visibility });
|
|
}
|
|
}
|
|
|
|
pub fn __divti3(a: i128, b: i128) callconv(.C) i128 {
|
|
return div(a, b);
|
|
}
|
|
|
|
const v128 = @Vector(2, u64);
|
|
|
|
fn __divti3_windows_x86_64(a: v128, b: v128) callconv(.C) v128 {
|
|
return @as(v128, @bitCast(div(@as(i128, @bitCast(a)), @as(i128, @bitCast(b)))));
|
|
}
|
|
|
|
inline fn div(a: i128, b: i128) i128 {
|
|
const s_a = a >> (128 - 1);
|
|
const s_b = b >> (128 - 1);
|
|
|
|
const an = (a ^ s_a) -% s_a;
|
|
const bn = (b ^ s_b) -% s_b;
|
|
|
|
const r = udivmod(u128, @as(u128, @bitCast(an)), @as(u128, @bitCast(bn)), null);
|
|
const s = s_a ^ s_b;
|
|
return (@as(i128, @bitCast(r)) ^ s) -% s;
|
|
}
|
|
|
|
test {
|
|
_ = @import("divti3_test.zig");
|
|
}
|