blender/intern/cycles/util/util_avxb.h
OmarSquircleArt f047d47e24 Cycles: AVX implantation of Perlin noise.
This patch adds an AVX implementation of Perlin noise in Cycles.
An avxi type was also added as a utility based on the respective
type in Intel Embree.

Only 3D and 4D noise were implemented, there is no benefit for
utilizing AVX in 1D and 2D noise. The SSE trilinear interpolation
function was used in the AVX implementation because there is no
benefit from using AVX in interpolating the last three dimensions.

Differential Revision: https://developer.blender.org/D6680
2020-04-01 14:48:01 +02:00

244 lines
6.6 KiB
C

/*
* Copyright 2011-2013 Intel Corporation
* Modifications Copyright 2014, Blender Foundation.
*
* Licensed under the Apache License, Version 2.0(the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __UTIL_AVXB_H__
#define __UTIL_AVXB_H__
CCL_NAMESPACE_BEGIN
struct avxf;
/*! 4-wide SSE bool type. */
struct avxb {
typedef avxb Mask; // mask type
typedef avxf Float; // float type
enum { size = 8 }; // number of SIMD elements
union {
__m256 m256;
int32_t v[8];
}; // data
////////////////////////////////////////////////////////////////////////////////
/// Constructors, Assignment & Cast Operators
////////////////////////////////////////////////////////////////////////////////
__forceinline avxb()
{
}
__forceinline avxb(const avxb &other)
{
m256 = other.m256;
}
__forceinline avxb &operator=(const avxb &other)
{
m256 = other.m256;
return *this;
}
__forceinline avxb(const __m256 input) : m256(input)
{
}
__forceinline avxb(const __m128 &a, const __m128 &b)
: m256(_mm256_insertf128_ps(_mm256_castps128_ps256(a), b, 1))
{
}
__forceinline operator const __m256 &(void)const
{
return m256;
}
__forceinline operator const __m256i(void) const
{
return _mm256_castps_si256(m256);
}
__forceinline operator const __m256d(void) const
{
return _mm256_castps_pd(m256);
}
////////////////////////////////////////////////////////////////////////////////
/// Constants
////////////////////////////////////////////////////////////////////////////////
__forceinline avxb(FalseTy) : m256(_mm256_setzero_ps())
{
}
__forceinline avxb(TrueTy) : m256(_mm256_castsi256_ps(_mm256_set1_epi32(-1)))
{
}
////////////////////////////////////////////////////////////////////////////////
/// Array Access
////////////////////////////////////////////////////////////////////////////////
__forceinline bool operator[](const size_t i) const
{
assert(i < 8);
return (_mm256_movemask_ps(m256) >> i) & 1;
}
__forceinline int32_t &operator[](const size_t i)
{
assert(i < 8);
return v[i];
}
};
////////////////////////////////////////////////////////////////////////////////
/// Unary Operators
////////////////////////////////////////////////////////////////////////////////
__forceinline const avxb operator!(const avxb &a)
{
return _mm256_xor_ps(a, avxb(True));
}
////////////////////////////////////////////////////////////////////////////////
/// Binary Operators
////////////////////////////////////////////////////////////////////////////////
__forceinline const avxb operator&(const avxb &a, const avxb &b)
{
return _mm256_and_ps(a, b);
}
__forceinline const avxb operator|(const avxb &a, const avxb &b)
{
return _mm256_or_ps(a, b);
}
__forceinline const avxb operator^(const avxb &a, const avxb &b)
{
return _mm256_xor_ps(a, b);
}
////////////////////////////////////////////////////////////////////////////////
/// Assignment Operators
////////////////////////////////////////////////////////////////////////////////
__forceinline const avxb operator&=(avxb &a, const avxb &b)
{
return a = a & b;
}
__forceinline const avxb operator|=(avxb &a, const avxb &b)
{
return a = a | b;
}
__forceinline const avxb operator^=(avxb &a, const avxb &b)
{
return a = a ^ b;
}
////////////////////////////////////////////////////////////////////////////////
/// Comparison Operators + Select
////////////////////////////////////////////////////////////////////////////////
__forceinline const avxb operator!=(const avxb &a, const avxb &b)
{
return _mm256_xor_ps(a, b);
}
__forceinline const avxb operator==(const avxb &a, const avxb &b)
{
#ifdef __KERNEL_AVX2__
return _mm256_castsi256_ps(_mm256_cmpeq_epi32(a, b));
#else
__m128i a_lo = _mm_castps_si128(_mm256_extractf128_ps(a, 0));
__m128i a_hi = _mm_castps_si128(_mm256_extractf128_ps(a, 1));
__m128i b_lo = _mm_castps_si128(_mm256_extractf128_ps(b, 0));
__m128i b_hi = _mm_castps_si128(_mm256_extractf128_ps(b, 1));
__m128i c_lo = _mm_cmpeq_epi32(a_lo, b_lo);
__m128i c_hi = _mm_cmpeq_epi32(a_hi, b_hi);
__m256i result = _mm256_insertf128_si256(_mm256_castsi128_si256(c_lo), c_hi, 1);
return _mm256_castsi256_ps(result);
#endif
}
__forceinline const avxb select(const avxb &m, const avxb &t, const avxb &f)
{
#if defined(__KERNEL_SSE41__)
return _mm256_blendv_ps(f, t, m);
#else
return _mm256_or_ps(_mm256_and_ps(m, t), _mm256_andnot_ps(m, f));
#endif
}
////////////////////////////////////////////////////////////////////////////////
/// Movement/Shifting/Shuffling Functions
////////////////////////////////////////////////////////////////////////////////
__forceinline const avxb unpacklo(const avxb &a, const avxb &b)
{
return _mm256_unpacklo_ps(a, b);
}
__forceinline const avxb unpackhi(const avxb &a, const avxb &b)
{
return _mm256_unpackhi_ps(a, b);
}
////////////////////////////////////////////////////////////////////////////////
/// Reduction Operations
////////////////////////////////////////////////////////////////////////////////
#if defined(__KERNEL_SSE41__)
__forceinline size_t popcnt(const avxb &a)
{
return __popcnt(_mm256_movemask_ps(a));
}
#else
__forceinline size_t popcnt(const avxb &a)
{
return bool(a[0]) + bool(a[1]) + bool(a[2]) + bool(a[3]) + bool(a[4]) + bool(a[5]) + bool(a[6]) +
bool(a[7]);
}
#endif
__forceinline bool reduce_and(const avxb &a)
{
return _mm256_movemask_ps(a) == 0xf;
}
__forceinline bool reduce_or(const avxb &a)
{
return _mm256_movemask_ps(a) != 0x0;
}
__forceinline bool all(const avxb &b)
{
return _mm256_movemask_ps(b) == 0xf;
}
__forceinline bool any(const avxb &b)
{
return _mm256_movemask_ps(b) != 0x0;
}
__forceinline bool none(const avxb &b)
{
return _mm256_movemask_ps(b) == 0x0;
}
__forceinline size_t movemask(const avxb &a)
{
return _mm256_movemask_ps(a);
}
////////////////////////////////////////////////////////////////////////////////
/// Debug Functions
////////////////////////////////////////////////////////////////////////////////
ccl_device_inline void print_avxb(const char *label, const avxb &a)
{
printf("%s: %d %d %d %d %d %d %d %d\n", label, a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7]);
}
CCL_NAMESPACE_END
#endif