Commit 1abc9252922f242b801fe88533b482a18724237d | zig

author	Ben Noordhuis <info@bnoordhuis.nl> 2018-06-30 01:44:54+02:00
committer	Ben Noordhuis <info@bnoordhuis.nl> 2018-06-30 01:58:17+02:00
log	1abc9252922f242b801fe88533b482a18724237d
tree	67ca4e88d72dc60dbcafa2a47ca652e83d4dada3
parent	f36b095b5ff2176f357d84a9924740324b069765

refs #1122

1 files changed, 19 insertions(+), 0 deletions(-)

std/math/fabs.zig+19

...	...	@@ -10,12 +10,19 @@ const assert = std.debug.assert;
10	10	pub fn fabs(x: var) @typeOf(x) {
11	11	const T = @typeOf(x);
12	12	return switch (T) {
	13	f16 => fabs16(x),
13	14	f32 => fabs32(x),
14	15	f64 => fabs64(x),
15	16	else => @compileError("fabs not implemented for " ++ @typeName(T)),
16	17	};
17	18	}
18	19
	20	fn fabs16(x: f16) f16 {
	21	var u = @bitCast(u16, x);
	22	u &= 0x7FFF;
	23	return @bitCast(f16, u);
	24	}
	25
19	26	fn fabs32(x: f32) f32 {
20	27	var u = @bitCast(u32, x);
21	28	u &= 0x7FFFFFFF;
...	...	@@ -29,10 +36,16 @@ fn fabs64(x: f64) f64 {
29	36	}
30	37
31	38	test "math.fabs" {
	39	assert(fabs(f16(1.0)) == fabs16(1.0));
32	40	assert(fabs(f32(1.0)) == fabs32(1.0));
33	41	assert(fabs(f64(1.0)) == fabs64(1.0));
34	42	}
35	43
	44	test "math.fabs16" {
	45	assert(fabs16(1.0) == 1.0);
	46	assert(fabs16(-1.0) == 1.0);
	47	}
	48
36	49	test "math.fabs32" {
37	50	assert(fabs32(1.0) == 1.0);
38	51	assert(fabs32(-1.0) == 1.0);
...	...	@@ -43,6 +56,12 @@ test "math.fabs64" {
43	56	assert(fabs64(-1.0) == 1.0);
44	57	}
45	58
	59	test "math.fabs16.special" {
	60	assert(math.isPositiveInf(fabs(math.inf(f16))));
	61	assert(math.isPositiveInf(fabs(-math.inf(f16))));
	62	assert(math.isNan(fabs(math.nan(f16))));
	63	}
	64
46	65	test "math.fabs32.special" {
47	66	assert(math.isPositiveInf(fabs(math.inf(f32))));
48	67	assert(math.isPositiveInf(fabs(-math.inf(f32))));