Commit 9f6edfd2016177883c952cd72bbcfab87025703c | zig

author	LemonBoy <thatlemon@gmail.com> 2021-03-23 09:17:57+01:00
committer	LemonBoy <thatlemon@gmail.com> 2021-05-01 16:28:03+02:00
log	9f6edfd2016177883c952cd72bbcfab87025703c
tree	2d9d1f50a195d7970e03b1fdae763b2a1963c540
parent	718b43504eae6af063f8b9cf5803a82758c7e37b

1 files changed, 12 insertions(+), 0 deletions(-)

lib/std/math/signbit.zig+12

...	...	@@ -14,6 +14,7 @@ pub fn signbit(x: anytype) bool {
14	14	f16 => signbit16(x),
15	15	f32 => signbit32(x),
16	16	f64 => signbit64(x),
	17	f128 => signbit128(x),
17	18	else => @compileError("signbit not implemented for " ++ @typeName(T)),
18	19	};
19	20	}
...	...	@@ -33,10 +34,16 @@ fn signbit64(x: f64) bool {
33	34	return bits >> 63 != 0;
34	35	}
35	36
	37	fn signbit128(x: f128) bool {
	38	const bits = @bitCast(u128, x);
	39	return bits >> 127 != 0;
	40	}
	41
36	42	test "math.signbit" {
37	43	expect(signbit(@as(f16, 4.0)) == signbit16(4.0));
38	44	expect(signbit(@as(f32, 4.0)) == signbit32(4.0));
39	45	expect(signbit(@as(f64, 4.0)) == signbit64(4.0));
	46	expect(signbit(@as(f128, 4.0)) == signbit128(4.0));
40	47	}
41	48
42	49	test "math.signbit16" {
...	...	@@ -53,3 +60,8 @@ test "math.signbit64" {
53	60	expect(!signbit64(4.0));
54	61	expect(signbit64(-3.0));
55	62	}
	63
	64	test "math.signbit128" {
	65	expect(!signbit128(4.0));
	66	expect(signbit128(-3.0));
	67	}