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Diffstat (limited to 'intern/cycles/util/util_ssef.h')
| -rw-r--r-- | intern/cycles/util/util_ssef.h | 588 |
1 files changed, 588 insertions, 0 deletions
diff --git a/intern/cycles/util/util_ssef.h b/intern/cycles/util/util_ssef.h new file mode 100644 index 00000000000..f4236cc616e --- /dev/null +++ b/intern/cycles/util/util_ssef.h @@ -0,0 +1,588 @@ +/* + * 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_SSEF_H__ +#define __UTIL_SSEF_H__ + +CCL_NAMESPACE_BEGIN + +#ifdef __KERNEL_SSE2__ + +/*! 4-wide SSE float type. */ +struct ssef +{ + typedef sseb Mask; // mask type + typedef ssei Int; // int type + typedef ssef Float; // float type + + enum { size = 4 }; // number of SIMD elements + union { __m128 m128; float f[4]; int i[4]; }; // data + + //////////////////////////////////////////////////////////////////////////////// + /// Constructors, Assignment & Cast Operators + //////////////////////////////////////////////////////////////////////////////// + + __forceinline ssef () {} + __forceinline ssef (const ssef& other) { m128 = other.m128; } + __forceinline ssef& operator=(const ssef& other) { m128 = other.m128; return *this; } + + __forceinline ssef(const __m128 a) : m128(a) {} + __forceinline operator const __m128&(void) const { return m128; } + __forceinline operator __m128&(void) { return m128; } + + __forceinline ssef (float a) : m128(_mm_set1_ps(a)) {} + __forceinline ssef (float a, float b, float c, float d) : m128(_mm_setr_ps(a, b, c, d)) {} + + __forceinline explicit ssef(const __m128i a) : m128(_mm_cvtepi32_ps(a)) {} + + //////////////////////////////////////////////////////////////////////////////// + /// Loads and Stores + //////////////////////////////////////////////////////////////////////////////// + +#if defined(__KERNEL_AVX__) + static __forceinline ssef broadcast(const void* const a) { return _mm_broadcast_ss((float*)a); } +#else + static __forceinline ssef broadcast(const void* const a) { return _mm_set1_ps(*(float*)a); } +#endif + + //////////////////////////////////////////////////////////////////////////////// + /// Array Access + //////////////////////////////////////////////////////////////////////////////// + + __forceinline const float& operator [](const size_t i) const { assert(i < 4); return f[i]; } + __forceinline float& operator [](const size_t i) { assert(i < 4); return f[i]; } +}; + + +//////////////////////////////////////////////////////////////////////////////// +/// Unary Operators +//////////////////////////////////////////////////////////////////////////////// + +__forceinline const ssef cast (const __m128i& a) { return _mm_castsi128_ps(a); } +__forceinline const ssef operator +(const ssef& a) { return a; } +__forceinline const ssef operator -(const ssef& a) { return _mm_xor_ps(a.m128, _mm_castsi128_ps(_mm_set1_epi32(0x80000000))); } +__forceinline const ssef abs (const ssef& a) { return _mm_and_ps(a.m128, _mm_castsi128_ps(_mm_set1_epi32(0x7fffffff))); } +#if defined(__KERNEL_SSE41__) +__forceinline const ssef sign (const ssef& a) { return _mm_blendv_ps(ssef(1.0f), -ssef(1.0f), _mm_cmplt_ps(a,ssef(0.0f))); } +#endif +__forceinline const ssef signmsk (const ssef& a) { return _mm_and_ps(a.m128,_mm_castsi128_ps(_mm_set1_epi32(0x80000000))); } + +__forceinline const ssef rcp (const ssef& a) { + const ssef r = _mm_rcp_ps(a.m128); + return _mm_sub_ps(_mm_add_ps(r, r), _mm_mul_ps(_mm_mul_ps(r, r), a)); +} +__forceinline const ssef sqr (const ssef& a) { return _mm_mul_ps(a,a); } +__forceinline const ssef mm_sqrt(const ssef& a) { return _mm_sqrt_ps(a.m128); } +__forceinline const ssef rsqrt(const ssef& a) { + const ssef r = _mm_rsqrt_ps(a.m128); + return _mm_add_ps(_mm_mul_ps(_mm_set_ps(1.5f, 1.5f, 1.5f, 1.5f), r), + _mm_mul_ps(_mm_mul_ps(_mm_mul_ps(a, _mm_set_ps(-0.5f, -0.5f, -0.5f, -0.5f)), r), _mm_mul_ps(r, r))); +} + +//////////////////////////////////////////////////////////////////////////////// +/// Binary Operators +//////////////////////////////////////////////////////////////////////////////// + +__forceinline const ssef operator +(const ssef& a, const ssef& b) { return _mm_add_ps(a.m128, b.m128); } +__forceinline const ssef operator +(const ssef& a, const float& b) { return a + ssef(b); } +__forceinline const ssef operator +(const float& a, const ssef& b) { return ssef(a) + b; } + +__forceinline const ssef operator -(const ssef& a, const ssef& b) { return _mm_sub_ps(a.m128, b.m128); } +__forceinline const ssef operator -(const ssef& a, const float& b) { return a - ssef(b); } +__forceinline const ssef operator -(const float& a, const ssef& b) { return ssef(a) - b; } + +__forceinline const ssef operator *(const ssef& a, const ssef& b) { return _mm_mul_ps(a.m128, b.m128); } +__forceinline const ssef operator *(const ssef& a, const float& b) { return a * ssef(b); } +__forceinline const ssef operator *(const float& a, const ssef& b) { return ssef(a) * b; } + +__forceinline const ssef operator /(const ssef& a, const ssef& b) { return _mm_div_ps(a.m128,b.m128); } +__forceinline const ssef operator /(const ssef& a, const float& b) { return a/ssef(b); } +__forceinline const ssef operator /(const float& a, const ssef& b) { return ssef(a)/b; } + +__forceinline const ssef operator^(const ssef& a, const ssef& b) { return _mm_xor_ps(a.m128,b.m128); } +__forceinline const ssef operator^(const ssef& a, const ssei& b) { return _mm_xor_ps(a.m128,_mm_castsi128_ps(b.m128)); } + +__forceinline const ssef operator&(const ssef& a, const ssef& b) { return _mm_and_ps(a.m128,b.m128); } +__forceinline const ssef operator&(const ssef& a, const ssei& b) { return _mm_and_ps(a.m128,_mm_castsi128_ps(b.m128)); } + +__forceinline const ssef andnot(const ssef& a, const ssef& b) { return _mm_andnot_ps(a.m128,b.m128); } + +__forceinline const ssef min(const ssef& a, const ssef& b) { return _mm_min_ps(a.m128,b.m128); } +__forceinline const ssef min(const ssef& a, const float& b) { return _mm_min_ps(a.m128,ssef(b)); } +__forceinline const ssef min(const float& a, const ssef& b) { return _mm_min_ps(ssef(a),b.m128); } + +__forceinline const ssef max(const ssef& a, const ssef& b) { return _mm_max_ps(a.m128,b.m128); } +__forceinline const ssef max(const ssef& a, const float& b) { return _mm_max_ps(a.m128,ssef(b)); } +__forceinline const ssef max(const float& a, const ssef& b) { return _mm_max_ps(ssef(a),b.m128); } + +#if defined(__KERNEL_SSE41__) +__forceinline ssef mini(const ssef& a, const ssef& b) { + const ssei ai = _mm_castps_si128(a); + const ssei bi = _mm_castps_si128(b); + const ssei ci = _mm_min_epi32(ai,bi); + return _mm_castsi128_ps(ci); +} +#endif + +#if defined(__KERNEL_SSE41__) +__forceinline ssef maxi(const ssef& a, const ssef& b) { + const ssei ai = _mm_castps_si128(a); + const ssei bi = _mm_castps_si128(b); + const ssei ci = _mm_max_epi32(ai,bi); + return _mm_castsi128_ps(ci); +} +#endif + +//////////////////////////////////////////////////////////////////////////////// +/// Ternary Operators +//////////////////////////////////////////////////////////////////////////////// + +#if defined(__KERNEL_AVX2__) +__forceinline const ssef madd (const ssef& a, const ssef& b, const ssef& c) { return _mm_fmadd_ps(a,b,c); } +__forceinline const ssef msub (const ssef& a, const ssef& b, const ssef& c) { return _mm_fmsub_ps(a,b,c); } +__forceinline const ssef nmadd(const ssef& a, const ssef& b, const ssef& c) { return _mm_fnmadd_ps(a,b,c); } +__forceinline const ssef nmsub(const ssef& a, const ssef& b, const ssef& c) { return _mm_fnmsub_ps(a,b,c); } +#else +__forceinline const ssef madd (const ssef& a, const ssef& b, const ssef& c) { return a*b+c; } +__forceinline const ssef msub (const ssef& a, const ssef& b, const ssef& c) { return a*b-c; } +__forceinline const ssef nmadd(const ssef& a, const ssef& b, const ssef& c) { return -a*b-c;} +__forceinline const ssef nmsub(const ssef& a, const ssef& b, const ssef& c) { return c-a*b; } +#endif + +//////////////////////////////////////////////////////////////////////////////// +/// Assignment Operators +//////////////////////////////////////////////////////////////////////////////// + +__forceinline ssef& operator +=(ssef& a, const ssef& b) { return a = a + b; } +__forceinline ssef& operator +=(ssef& a, const float& b) { return a = a + b; } + +__forceinline ssef& operator -=(ssef& a, const ssef& b) { return a = a - b; } +__forceinline ssef& operator -=(ssef& a, const float& b) { return a = a - b; } + +__forceinline ssef& operator *=(ssef& a, const ssef& b) { return a = a * b; } +__forceinline ssef& operator *=(ssef& a, const float& b) { return a = a * b; } + +__forceinline ssef& operator /=(ssef& a, const ssef& b) { return a = a / b; } +__forceinline ssef& operator /=(ssef& a, const float& b) { return a = a / b; } + +//////////////////////////////////////////////////////////////////////////////// +/// Comparison Operators + Select +//////////////////////////////////////////////////////////////////////////////// + +__forceinline const sseb operator ==(const ssef& a, const ssef& b) { return _mm_cmpeq_ps(a.m128, b.m128); } +__forceinline const sseb operator ==(const ssef& a, const float& b) { return a == ssef(b); } +__forceinline const sseb operator ==(const float& a, const ssef& b) { return ssef(a) == b; } + +__forceinline const sseb operator !=(const ssef& a, const ssef& b) { return _mm_cmpneq_ps(a.m128, b.m128); } +__forceinline const sseb operator !=(const ssef& a, const float& b) { return a != ssef(b); } +__forceinline const sseb operator !=(const float& a, const ssef& b) { return ssef(a) != b; } + +__forceinline const sseb operator <(const ssef& a, const ssef& b) { return _mm_cmplt_ps(a.m128, b.m128); } +__forceinline const sseb operator <(const ssef& a, const float& b) { return a < ssef(b); } +__forceinline const sseb operator <(const float& a, const ssef& b) { return ssef(a) < b; } + +__forceinline const sseb operator >=(const ssef& a, const ssef& b) { return _mm_cmpnlt_ps(a.m128, b.m128); } +__forceinline const sseb operator >=(const ssef& a, const float& b) { return a >= ssef(b); } +__forceinline const sseb operator >=(const float& a, const ssef& b) { return ssef(a) >= b; } + +__forceinline const sseb operator >(const ssef& a, const ssef& b) { return _mm_cmpnle_ps(a.m128, b.m128); } +__forceinline const sseb operator >(const ssef& a, const float& b) { return a > ssef(b); } +__forceinline const sseb operator >(const float& a, const ssef& b) { return ssef(a) > b; } + +__forceinline const sseb operator <=(const ssef& a, const ssef& b) { return _mm_cmple_ps(a.m128, b.m128); } +__forceinline const sseb operator <=(const ssef& a, const float& b) { return a <= ssef(b); } +__forceinline const sseb operator <=(const float& a, const ssef& b) { return ssef(a) <= b; } + +__forceinline const ssef select(const sseb& m, const ssef& t, const ssef& f) { +#ifdef __KERNEL_SSE41__ + return _mm_blendv_ps(f, t, m); +#else + return _mm_or_ps(_mm_and_ps(m, t), _mm_andnot_ps(m, f)); +#endif +} + +__forceinline const ssef select(const ssef& m, const ssef& t, const ssef& f) { +#ifdef __KERNEL_SSE41__ + return _mm_blendv_ps(f, t, m); +#else + return _mm_or_ps(_mm_and_ps(m, t), _mm_andnot_ps(m, f)); +#endif +} + +__forceinline const ssef select(const int mask, const ssef& t, const ssef& f) { +#if defined(__KERNEL_SSE41__) && ((!defined(__clang__) && !defined(_MSC_VER)) || defined(__INTEL_COMPILER)) + return _mm_blend_ps(f, t, mask); +#else + return select(sseb(mask),t,f); +#endif +} + +//////////////////////////////////////////////////////////////////////////////// +/// Rounding Functions +//////////////////////////////////////////////////////////////////////////////// + +#if defined(__KERNEL_SSE41__) +__forceinline const ssef round_even(const ssef& a) { return _mm_round_ps(a, _MM_FROUND_TO_NEAREST_INT); } +__forceinline const ssef round_down(const ssef& a) { return _mm_round_ps(a, _MM_FROUND_TO_NEG_INF ); } +__forceinline const ssef round_up (const ssef& a) { return _mm_round_ps(a, _MM_FROUND_TO_POS_INF ); } +__forceinline const ssef round_zero(const ssef& a) { return _mm_round_ps(a, _MM_FROUND_TO_ZERO ); } +__forceinline const ssef floor (const ssef& a) { return _mm_round_ps(a, _MM_FROUND_TO_NEG_INF ); } +__forceinline const ssef ceil (const ssef& a) { return _mm_round_ps(a, _MM_FROUND_TO_POS_INF ); } +#endif + +__forceinline ssei truncatei(const ssef& a) { + return _mm_cvttps_epi32(a.m128); +} + +__forceinline ssei floori(const ssef& a) { +#if defined(__KERNEL_SSE41__) + return ssei(floor(a)); +#else + return ssei(a-ssef(0.5f)); +#endif +} + +//////////////////////////////////////////////////////////////////////////////// +/// Movement/Shifting/Shuffling Functions +//////////////////////////////////////////////////////////////////////////////// + +__forceinline ssef unpacklo(const ssef& a, const ssef& b) { return _mm_unpacklo_ps(a.m128, b.m128); } +__forceinline ssef unpackhi(const ssef& a, const ssef& b) { return _mm_unpackhi_ps(a.m128, b.m128); } + +template<size_t i0, size_t i1, size_t i2, size_t i3> __forceinline const ssef shuffle(const ssef& b) { + return _mm_castsi128_ps(_mm_shuffle_epi32(_mm_castps_si128(b), _MM_SHUFFLE(i3, i2, i1, i0))); +} + +template<size_t i0, size_t i1, size_t i2, size_t i3> __forceinline const ssef shuffle(const ssef& a, const ssef& b) { + return _mm_shuffle_ps(a, b, _MM_SHUFFLE(i3, i2, i1, i0)); +} + +#if defined(__KERNEL_SSSE3__) +__forceinline const ssef shuffle8(const ssef& a, const ssei& shuf) { + return _mm_castsi128_ps(_mm_shuffle_epi8(_mm_castps_si128(a), shuf)); +} +#endif + +#if defined(__KERNEL_SSE3__) +template<> __forceinline const ssef shuffle<0, 0, 2, 2>(const ssef& b) { return _mm_moveldup_ps(b); } +template<> __forceinline const ssef shuffle<1, 1, 3, 3>(const ssef& b) { return _mm_movehdup_ps(b); } +template<> __forceinline const ssef shuffle<0, 1, 0, 1>(const ssef& b) { return _mm_castpd_ps(_mm_movedup_pd(_mm_castps_pd(b))); } +#endif + +template<size_t i0> __forceinline const ssef shuffle(const ssef& b) { + return shuffle<i0,i0,i0,i0>(b); +} + +#if defined(__KERNEL_SSE41__) && !defined(__GNUC__) +template<size_t i> __forceinline float extract (const ssef& a) { return _mm_cvtss_f32(_mm_extract_ps(a,i)); } +#else +template<size_t i> __forceinline float extract (const ssef& a) { return _mm_cvtss_f32(shuffle<i,i,i,i>(a)); } +#endif +template<> __forceinline float extract<0>(const ssef& a) { return _mm_cvtss_f32(a); } + +#if defined(__KERNEL_SSE41__) +template<size_t dst, size_t src, size_t clr> __forceinline const ssef insert(const ssef& a, const ssef& b) { return _mm_insert_ps(a, b,(dst << 4) |(src << 6) | clr); } +template<size_t dst, size_t src> __forceinline const ssef insert(const ssef& a, const ssef& b) { return insert<dst, src, 0>(a, b); } +template<size_t dst> __forceinline const ssef insert(const ssef& a, const float b) { return insert<dst, 0>(a, _mm_set_ss(b)); } +#else +template<size_t dst> __forceinline const ssef insert(const ssef& a, const float b) { ssef c = a; c[dst] = b; return c; } +#endif + +//////////////////////////////////////////////////////////////////////////////// +/// Transpose +//////////////////////////////////////////////////////////////////////////////// + +__forceinline void transpose(const ssef& r0, const ssef& r1, const ssef& r2, const ssef& r3, ssef& c0, ssef& c1, ssef& c2, ssef& c3) +{ + ssef l02 = unpacklo(r0,r2); + ssef h02 = unpackhi(r0,r2); + ssef l13 = unpacklo(r1,r3); + ssef h13 = unpackhi(r1,r3); + c0 = unpacklo(l02,l13); + c1 = unpackhi(l02,l13); + c2 = unpacklo(h02,h13); + c3 = unpackhi(h02,h13); +} + +__forceinline void transpose(const ssef& r0, const ssef& r1, const ssef& r2, const ssef& r3, ssef& c0, ssef& c1, ssef& c2) +{ + ssef l02 = unpacklo(r0,r2); + ssef h02 = unpackhi(r0,r2); + ssef l13 = unpacklo(r1,r3); + ssef h13 = unpackhi(r1,r3); + c0 = unpacklo(l02,l13); + c1 = unpackhi(l02,l13); + c2 = unpacklo(h02,h13); +} + +//////////////////////////////////////////////////////////////////////////////// +/// Reductions +//////////////////////////////////////////////////////////////////////////////// + +__forceinline const ssef vreduce_min(const ssef& v) { ssef h = min(shuffle<1,0,3,2>(v),v); return min(shuffle<2,3,0,1>(h),h); } +__forceinline const ssef vreduce_max(const ssef& v) { ssef h = max(shuffle<1,0,3,2>(v),v); return max(shuffle<2,3,0,1>(h),h); } +__forceinline const ssef vreduce_add(const ssef& v) { ssef h = shuffle<1,0,3,2>(v) + v ; return shuffle<2,3,0,1>(h) + h ; } + +__forceinline float reduce_min(const ssef& v) { return _mm_cvtss_f32(vreduce_min(v)); } +__forceinline float reduce_max(const ssef& v) { return _mm_cvtss_f32(vreduce_max(v)); } +__forceinline float reduce_add(const ssef& v) { return _mm_cvtss_f32(vreduce_add(v)); } + +__forceinline size_t select_min(const ssef& v) { return __bsf(movemask(v == vreduce_min(v))); } +__forceinline size_t select_max(const ssef& v) { return __bsf(movemask(v == vreduce_max(v))); } + +__forceinline size_t select_min(const sseb& valid, const ssef& v) { const ssef a = select(valid,v,ssef(pos_inf)); return __bsf(movemask(valid &(a == vreduce_min(a)))); } +__forceinline size_t select_max(const sseb& valid, const ssef& v) { const ssef a = select(valid,v,ssef(neg_inf)); return __bsf(movemask(valid &(a == vreduce_max(a)))); } + +//////////////////////////////////////////////////////////////////////////////// +/// Memory load and store operations +//////////////////////////////////////////////////////////////////////////////// + +__forceinline ssef load4f(const float4& a) { +#ifdef __KERNEL_WITH_SSE_ALIGN__ + return _mm_load_ps(&a.x); +#else + return _mm_loadu_ps(&a.x); +#endif +} + +__forceinline ssef load4f(const float3& a) { +#ifdef __KERNEL_WITH_SSE_ALIGN__ + return _mm_load_ps(&a.x); +#else + return _mm_loadu_ps(&a.x); +#endif +} + +__forceinline ssef load4f(const void* const a) { + return _mm_load_ps((float*)a); +} + +__forceinline ssef load1f_first(const float a) { + return _mm_set_ss(a); +} + +__forceinline void store4f(void* ptr, const ssef& v) { + _mm_store_ps((float*)ptr,v); +} + +__forceinline ssef loadu4f(const void* const a) { + return _mm_loadu_ps((float*)a); +} + +__forceinline void storeu4f(void* ptr, const ssef& v) { + _mm_storeu_ps((float*)ptr,v); +} + +__forceinline void store4f(const sseb& mask, void* ptr, const ssef& f) { +#if defined(__KERNEL_AVX__) + _mm_maskstore_ps((float*)ptr,(__m128i)mask,f); +#else + *(ssef*)ptr = select(mask,f,*(ssef*)ptr); +#endif +} + +__forceinline ssef load4f_nt(void* ptr) { +#if defined(__KERNEL_SSE41__) + return _mm_castsi128_ps(_mm_stream_load_si128((__m128i*)ptr)); +#else + return _mm_load_ps((float*)ptr); +#endif +} + +__forceinline void store4f_nt(void* ptr, const ssef& v) { +#if defined(__KERNEL_SSE41__) + _mm_stream_ps((float*)ptr,v); +#else + _mm_store_ps((float*)ptr,v); +#endif +} + +//////////////////////////////////////////////////////////////////////////////// +/// Euclidian Space Operators +//////////////////////////////////////////////////////////////////////////////// + +__forceinline float dot(const ssef& a, const ssef& b) { + return reduce_add(a*b); +} + +/* calculate shuffled cross product, useful when order of components does not matter */ +__forceinline ssef cross_zxy(const ssef& a, const ssef& b) +{ + const ssef a0 = a; + const ssef b0 = shuffle<1,2,0,3>(b); + const ssef a1 = shuffle<1,2,0,3>(a); + const ssef b1 = b; + return msub(a0,b0,a1*b1); +} + +__forceinline ssef cross(const ssef& a, const ssef& b) +{ + return shuffle<1,2,0,3>(cross_zxy(a, b)); +} + +ccl_device_inline const ssef dot3_splat(const ssef& a, const ssef& b) +{ +#ifdef __KERNEL_SSE41__ + return _mm_dp_ps(a.m128, b.m128, 0x7f); +#else + ssef t = a * b; + return ssef(((float*)&t)[0] + ((float*)&t)[1] + ((float*)&t)[2]); +#endif +} + +/* squared length taking only specified axes into account */ +template<size_t X, size_t Y, size_t Z, size_t W> +ccl_device_inline float len_squared(const ssef& a) +{ +#ifndef __KERNEL_SSE41__ + float4& t = (float4 &)a; + return (X ? t.x * t.x : 0.0f) + (Y ? t.y * t.y : 0.0f) + (Z ? t.z * t.z : 0.0f) + (W ? t.w * t.w : 0.0f); +#else + return extract<0>(ssef(_mm_dp_ps(a.m128, a.m128, (X << 4) | (Y << 5) | (Z << 6) | (W << 7) | 0xf))); +#endif +} + +ccl_device_inline float dot3(const ssef& a, const ssef& b) +{ +#ifdef __KERNEL_SSE41__ + return extract<0>(ssef(_mm_dp_ps(a.m128, b.m128, 0x7f))); +#else + ssef t = a * b; + return ((float*)&t)[0] + ((float*)&t)[1] + ((float*)&t)[2]; +#endif +} + +ccl_device_inline const ssef len3_squared_splat(const ssef& a) +{ + return dot3_splat(a, a); +} + +ccl_device_inline float len3_squared(const ssef& a) +{ + return dot3(a, a); +} + +ccl_device_inline float len3(const ssef& a) +{ + return extract<0>(mm_sqrt(dot3_splat(a, a))); +} + +/* SSE shuffle utility functions */ + +#ifdef __KERNEL_SSSE3__ + +/* faster version for SSSE3 */ +typedef ssei shuffle_swap_t; + +ccl_device_inline const shuffle_swap_t shuffle_swap_identity(void) +{ + return _mm_set_epi8(15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0); +} + +ccl_device_inline const shuffle_swap_t shuffle_swap_swap(void) +{ + return _mm_set_epi8(7, 6, 5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8); +} + +ccl_device_inline const ssef shuffle_swap(const ssef& a, const shuffle_swap_t& shuf) +{ + return cast(_mm_shuffle_epi8(cast(a), shuf)); +} + +#else + +/* somewhat slower version for SSE2 */ +typedef int shuffle_swap_t; + +ccl_device_inline const shuffle_swap_t shuffle_swap_identity(void) +{ + return 0; +} + +ccl_device_inline const shuffle_swap_t shuffle_swap_swap(void) +{ + return 1; +} + +ccl_device_inline const ssef shuffle_swap(const ssef& a, shuffle_swap_t shuf) +{ + /* shuffle value must be a constant, so we need to branch */ + if(shuf) + return ssef(_mm_shuffle_ps(a.m128, a.m128, _MM_SHUFFLE(1, 0, 3, 2))); + else + return ssef(_mm_shuffle_ps(a.m128, a.m128, _MM_SHUFFLE(3, 2, 1, 0))); +} + +#endif + +#ifdef __KERNEL_SSE41__ + +ccl_device_inline void gen_idirsplat_swap(const ssef &pn, const shuffle_swap_t &shuf_identity, const shuffle_swap_t &shuf_swap, + const float3& idir, ssef idirsplat[3], shuffle_swap_t shufflexyz[3]) +{ + const __m128 idirsplat_raw[] = { _mm_set_ps1(idir.x), _mm_set_ps1(idir.y), _mm_set_ps1(idir.z) }; + idirsplat[0] = _mm_xor_ps(idirsplat_raw[0], pn); + idirsplat[1] = _mm_xor_ps(idirsplat_raw[1], pn); + idirsplat[2] = _mm_xor_ps(idirsplat_raw[2], pn); + + const ssef signmask = cast(ssei(0x80000000)); + const ssef shuf_identity_f = cast(shuf_identity); + const ssef shuf_swap_f = cast(shuf_swap); + + shufflexyz[0] = _mm_castps_si128(_mm_blendv_ps(shuf_identity_f, shuf_swap_f, _mm_and_ps(idirsplat_raw[0], signmask))); + shufflexyz[1] = _mm_castps_si128(_mm_blendv_ps(shuf_identity_f, shuf_swap_f, _mm_and_ps(idirsplat_raw[1], signmask))); + shufflexyz[2] = _mm_castps_si128(_mm_blendv_ps(shuf_identity_f, shuf_swap_f, _mm_and_ps(idirsplat_raw[2], signmask))); +} + +#else + +ccl_device_inline void gen_idirsplat_swap(const ssef &pn, const shuffle_swap_t &shuf_identity, const shuffle_swap_t &shuf_swap, + const float3& idir, ssef idirsplat[3], shuffle_swap_t shufflexyz[3]) +{ + idirsplat[0] = ssef(idir.x) ^ pn; + idirsplat[1] = ssef(idir.y) ^ pn; + idirsplat[2] = ssef(idir.z) ^ pn; + + shufflexyz[0] = (idir.x >= 0)? shuf_identity: shuf_swap; + shufflexyz[1] = (idir.y >= 0)? shuf_identity: shuf_swap; + shufflexyz[2] = (idir.z >= 0)? shuf_identity: shuf_swap; +} + +#endif + +ccl_device_inline const ssef uint32_to_float(const ssei &in) +{ + ssei a = _mm_srli_epi32(in, 16); + ssei b = _mm_and_si128(in, _mm_set1_epi32(0x0000ffff)); + ssei c = _mm_or_si128(a, _mm_set1_epi32(0x53000000)); + ssef d = _mm_cvtepi32_ps(b); + ssef e = _mm_sub_ps(_mm_castsi128_ps(c), _mm_castsi128_ps(_mm_set1_epi32(0x53000000))); + return _mm_add_ps(e, d); +} + +template<size_t S1, size_t S2, size_t S3, size_t S4> +ccl_device_inline const ssef set_sign_bit(const ssef &a) +{ + return a ^ cast(ssei(S1 << 31, S2 << 31, S3 << 31, S4 << 31)); +} + +#endif + +CCL_NAMESPACE_END + +#endif + |