diff options
Diffstat (limited to 'intern/cycles/util/util_color.h')
| -rw-r--r-- | intern/cycles/util/util_color.h | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/intern/cycles/util/util_color.h b/intern/cycles/util/util_color.h index 203c0b289f6..40c2c431aca 100644 --- a/intern/cycles/util/util_color.h +++ b/intern/cycles/util/util_color.h @@ -223,12 +223,14 @@ ccl_device_inline ssef fastpow24(const ssef &arg) ssef x = fastpow<0x3F4CCCCD, 0x4F55A7FB>(arg); // error max = 0.17 avg = 0.0018 |avg| = 0.05 ssef arg2 = arg * arg; ssef arg4 = arg2 * arg2; - x = improve_5throot_solution(x, - arg4); /* error max = 0.018 avg = 0.0031 |avg| = 0.0031 */ - x = improve_5throot_solution(x, - arg4); /* error max = 0.00021 avg = 1.6e-05 |avg| = 1.6e-05 */ - x = improve_5throot_solution(x, - arg4); /* error max = 6.1e-07 avg = 5.2e-08 |avg| = 1.1e-07 */ + + /* error max = 0.018 avg = 0.0031 |avg| = 0.0031 */ + x = improve_5throot_solution(x, arg4); + /* error max = 0.00021 avg = 1.6e-05 |avg| = 1.6e-05 */ + x = improve_5throot_solution(x, arg4); + /* error max = 6.1e-07 avg = 5.2e-08 |avg| = 1.1e-07 */ + x = improve_5throot_solution(x, arg4); + return x * (x * x); } |