mirror of
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ec95e00e28
stage2: change logic for detecting whether the main package is inside
the std package. Previously it relied on realpath() which is not portable.
This uses resolve() which is how imports already work.
* stage2: fix cleanup bug when creating Module
* flatten lib/std/special/* to lib/*
- this was motivated by making main_pkg_is_inside_std false for
compiler_rt & friends.
* rename "mini libc" to "universal libc"
36 lines
1.1 KiB
Zig
36 lines
1.1 KiB
Zig
const std = @import("std");
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const popcount = @import("popcount.zig");
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const testing = std.testing;
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fn popcountti2Naive(a: i128) i32 {
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var x = a;
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var r: i32 = 0;
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while (x != 0) : (x = @bitCast(i128, @bitCast(u128, x) >> 1)) {
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r += @intCast(i32, x & 1);
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}
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return r;
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}
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fn test__popcountti2(a: i128) !void {
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const x = popcount.__popcountti2(a);
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const expected = popcountti2Naive(a);
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try testing.expectEqual(expected, x);
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}
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test "popcountti2" {
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try test__popcountti2(0);
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try test__popcountti2(1);
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try test__popcountti2(2);
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try test__popcountti2(@bitCast(i128, @as(u128, 0xffffffff_ffffffff_ffffffff_fffffffd)));
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try test__popcountti2(@bitCast(i128, @as(u128, 0xffffffff_ffffffff_ffffffff_fffffffe)));
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try test__popcountti2(@bitCast(i128, @as(u128, 0xffffffff_ffffffff_ffffffff_ffffffff)));
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const RndGen = std.rand.DefaultPrng;
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var rnd = RndGen.init(42);
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var i: u32 = 0;
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while (i < 10_000) : (i += 1) {
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var rand_num = rnd.random().int(i128);
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try test__popcountti2(rand_num);
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}
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}
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