diff options
Diffstat (limited to 'intern/cycles/util/util_math_fast.h')
| -rw-r--r-- | intern/cycles/util/util_math_fast.h | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/intern/cycles/util/util_math_fast.h b/intern/cycles/util/util_math_fast.h index c1a1be603f4..deb2013daae 100644 --- a/intern/cycles/util/util_math_fast.h +++ b/intern/cycles/util/util_math_fast.h @@ -47,7 +47,6 @@ CCL_NAMESPACE_BEGIN -/* TODO(sergey): Make sure it does not conflict with SSE intrinsics. */ ccl_device_inline float madd(const float a, const float b, const float c) { /* NOTE: In the future we may want to explicitly ask for a fused @@ -248,7 +247,7 @@ ccl_device float fast_sinpif(float x) * The basic idea of this approximation starts with the coarse approximation: * sin(pi*x) ~= f(x) = 4 * (x - x * abs(x)) * - * This approximation always _over_ estimates the target. On the otherhand, + * This approximation always _over_ estimates the target. On the other hand, * the curve: * sin(pi*x) ~= f(x) * abs(f(x)) / 4 * @@ -314,8 +313,7 @@ ccl_device float fast_atanf(float x) float r = s * madd(0.43157974f, t, 1.0f) / madd(madd(0.05831938f, t, 0.76443945f), t, 1.0f); if(a > 1.0f) { - /* TODO(sergey): Is it M_PI_2_F? */ - r = 1.570796326794896557998982f - r; + r = M_PI_2_F - r; } return copysignf(r, x); } @@ -341,8 +339,7 @@ ccl_device float fast_atan2f(float y, float x) if(b > a) { /* Account for arg reduction. */ - /* TODO(sergey): Is it M_PI_2_F? */ - r = 1.570796326794896557998982f - r; + r = M_PI_2_F - r; } /* Test sign bit of x. */ if(__float_as_uint(x) & 0x80000000u) { @@ -536,7 +533,7 @@ ccl_device float fast_safe_powf(float x, float y) } /* TODO(sergey): Check speed with our erf functions implementation from - * bsdf_microfaset.h. + * bsdf_microfacet.h. */ ccl_device_inline float fast_erff(float x) |