| ... | ... | @@ -4,6 +4,7 @@ |
| 4 | 4 | // - expm1(-inf) = -1 |
| 5 | 5 | // - expm1(nan) = nan |
| 6 | 6 | |
| 7 | const builtin = @import("builtin"); |
| 7 | 8 | const std = @import("../index.zig"); |
| 8 | 9 | const math = std.math; |
| 9 | 10 | const assert = std.debug.assert; |
| ... | ... | @@ -18,6 +19,7 @@ pub fn expm1(x: var) -> @typeOf(x) { |
| 18 | 19 | } |
| 19 | 20 | |
| 20 | 21 | fn expm1_32(x_: f32) -> f32 { |
| 22 | @setFloatMode(this, builtin.FloatMode.Strict); |
| 21 | 23 | const o_threshold: f32 = 8.8721679688e+01; |
| 22 | 24 | const ln2_hi: f32 = 6.9313812256e-01; |
| 23 | 25 | const ln2_lo: f32 = 9.0580006145e-06; |
| ... | ... | @@ -122,7 +124,7 @@ fn expm1_32(x_: f32) -> f32 { |
| 122 | 124 | } |
| 123 | 125 | } |
| 124 | 126 | |
| 125 | | const twopk = @bitCast(f32, u32((0x7F + k) << 23)); |
| 127 | const twopk = @bitCast(f32, u32((0x7F +% k) << 23)); |
| 126 | 128 | |
| 127 | 129 | if (k < 0 or k > 56) { |
| 128 | 130 | var y = x - e + 1.0; |
| ... | ... | @@ -135,7 +137,7 @@ fn expm1_32(x_: f32) -> f32 { |
| 135 | 137 | return y - 1.0; |
| 136 | 138 | } |
| 137 | 139 | |
| 138 | | const uf = @bitCast(f32, u32(0x7F - k) << 23); |
| 140 | const uf = @bitCast(f32, u32(0x7F -% k) << 23); |
| 139 | 141 | if (k < 23) { |
| 140 | 142 | return (x - e + (1 - uf)) * twopk; |
| 141 | 143 | } else { |
| ... | ... | @@ -144,6 +146,7 @@ fn expm1_32(x_: f32) -> f32 { |
| 144 | 146 | } |
| 145 | 147 | |
| 146 | 148 | fn expm1_64(x_: f64) -> f64 { |
| 149 | @setFloatMode(this, builtin.FloatMode.Strict); |
| 147 | 150 | const o_threshold: f64 = 7.09782712893383973096e+02; |
| 148 | 151 | const ln2_hi: f64 = 6.93147180369123816490e-01; |
| 149 | 152 | const ln2_lo: f64 = 1.90821492927058770002e-10; |
| ... | ... | @@ -251,7 +254,7 @@ fn expm1_64(x_: f64) -> f64 { |
| 251 | 254 | } |
| 252 | 255 | } |
| 253 | 256 | |
| 254 | | const twopk = @bitCast(f64, u64(0x3FF + k) << 52); |
| 257 | const twopk = @bitCast(f64, u64(0x3FF +% k) << 52); |
| 255 | 258 | |
| 256 | 259 | if (k < 0 or k > 56) { |
| 257 | 260 | var y = x - e + 1.0; |
| ... | ... | @@ -264,7 +267,7 @@ fn expm1_64(x_: f64) -> f64 { |
| 264 | 267 | return y - 1.0; |
| 265 | 268 | } |
| 266 | 269 | |
| 267 | | const uf = @bitCast(f64, u64(0x3FF - k) << 52); |
| 270 | const uf = @bitCast(f64, u64(0x3FF -% k) << 52); |
| 268 | 271 | if (k < 20) { |
| 269 | 272 | return (x - e + (1 - uf)) * twopk; |
| 270 | 273 | } else { |
Andrew Kelley <andrew@ziglang.org> 2018-01-06 02:58:45-05:00
std