Commit 951ab802a38ede9f5329aeae1fed00161321d558 | zig | Meg's Mirrors

author	alice <hi@dnydxn.moe> 2022-05-17 22:04:12+01:00
committer	alice <hi@dnydxn.moe> 2022-05-17 22:04:12+01:00
log	951ab802a38ede9f5329aeae1fed00161321d558
tree	b72445012f44c57c5e4670ebfc9e675777958fc4
parent	70b6b98e91fb9d1d5575da4d59c5c523864a8f0e
signature	Commit is signed but in an unrecognized format.

std.math: simpler error handling

4 files changed, 4 insertions(+), 16 deletions(-)

lib
- std
  - math
    isfinite.zig
    isinf.zig
    isnormal.zig
    ldexp.zig

lib/std/math/isfinite.zig+1-4

...	...	@@ -5,10 +5,7 @@ const expect = std.testing.expect;
5	5	/// Returns whether x is a finite value.
6	6	pub fn isFinite(x: anytype) bool {
7	7	const T = @TypeOf(x);
8		const TBits = std.meta.Int(.unsigned, @bitSizeOf(T));
9		if (@typeInfo(T) != .Float) {
10		@compileError("isFinite not implemented for " ++ @typeName(T));
11		}
	8	const TBits = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
12	9	const remove_sign = ~@as(TBits, 0) >> 1;
13	10	return @bitCast(TBits, x) & remove_sign < @bitCast(TBits, math.inf(T));
14	11	}

lib/std/math/isinf.zig+1-4

...	...	@@ -5,10 +5,7 @@ const expect = std.testing.expect;
5	5	/// Returns whether x is an infinity, ignoring sign.
6	6	pub fn isInf(x: anytype) bool {
7	7	const T = @TypeOf(x);
8		const TBits = std.meta.Int(.unsigned, @bitSizeOf(T));
9		if (@typeInfo(T) != .Float) {
10		@compileError("isInf not implemented for " ++ @typeName(T));
11		}
	8	const TBits = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
12	9	const remove_sign = ~@as(TBits, 0) >> 1;
13	10	return @bitCast(TBits, x) & remove_sign == @bitCast(TBits, math.inf(T));
14	11	}

lib/std/math/isnormal.zig+1-4

...	...	@@ -5,10 +5,7 @@ const expect = std.testing.expect;
5	5	/// Returns whether x is neither zero, subnormal, infinity, or NaN.
6	6	pub fn isNormal(x: anytype) bool {
7	7	const T = @TypeOf(x);
8		const TBits = std.meta.Int(.unsigned, @bitSizeOf(T));
9		if (@typeInfo(T) != .Float) {
10		@compileError("isNormal not implemented for " ++ @typeName(T));
11		}
	8	const TBits = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
12	9
13	10	const increment_exp = 1 << math.floatMantissaBits(T);
14	11	const remove_sign = ~@as(TBits, 0) >> 1;

lib/std/math/ldexp.zig+1-4

...	...	@@ -15,10 +15,7 @@ pub fn ldexp(x: anytype, n: i32) @TypeOf(x) {
15	15	var shift = n;
16	16
17	17	const T = @TypeOf(base);
18		const TBits = std.meta.Int(.unsigned, @bitSizeOf(T));
19		if (@typeInfo(T) != .Float) {
20		@compileError("ldexp not implemented for " ++ @typeName(T));
21		}
	18	const TBits = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
22	19
23	20	const mantissa_bits = math.floatMantissaBits(T);
24	21	const exponent_min = math.floatExponentMin(T);