| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkJumper_vectors_DEFINED |
| #define SkJumper_vectors_DEFINED |
| |
| #include "SkJumper.h" |
| #include "SkJumper_misc.h" |
| |
| // This file contains vector types that SkJumper_stages.cpp uses to define stages. |
| |
| // Every function in this file should be marked static and inline using SI (see SkJumper_misc.h). |
| |
| #if !defined(JUMPER) |
| // This path should lead to portable code that can be compiled directly into Skia. |
| // (All other paths are compiled offline by Clang into SkJumper_generated.S.) |
| #include <math.h> |
| |
| using F = float ; |
| using I32 = int32_t; |
| using U64 = uint64_t; |
| using U32 = uint32_t; |
| using U16 = uint16_t; |
| using U8 = uint8_t ; |
| |
| SI F mad(F f, F m, F a) { return f*m+a; } |
| SI F min(F a, F b) { return fminf(a,b); } |
| SI F max(F a, F b) { return fmaxf(a,b); } |
| SI F abs_ (F v) { return fabsf(v); } |
| SI F floor_(F v) { return floorf(v); } |
| SI F rcp (F v) { return 1.0f / v; } |
| SI F rsqrt (F v) { return 1.0f / sqrtf(v); } |
| SI U32 round (F v, F scale) { return (uint32_t)lrintf(v*scale); } |
| SI U16 pack(U32 v) { return (U16)v; } |
| SI U8 pack(U16 v) { return (U8)v; } |
| |
| SI F if_then_else(I32 c, F t, F e) { return c ? t : e; } |
| |
| template <typename T> |
| SI T gather(const T* p, U32 ix) { return p[ix]; } |
| |
| SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { |
| *r = ptr[0]; |
| *g = ptr[1]; |
| *b = ptr[2]; |
| } |
| SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { |
| *r = ptr[0]; |
| *g = ptr[1]; |
| *b = ptr[2]; |
| *a = ptr[3]; |
| } |
| SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { |
| ptr[0] = r; |
| ptr[1] = g; |
| ptr[2] = b; |
| ptr[3] = a; |
| } |
| |
| SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { |
| *r = ptr[0]; |
| *g = ptr[1]; |
| *b = ptr[2]; |
| *a = ptr[3]; |
| } |
| SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { |
| ptr[0] = r; |
| ptr[1] = g; |
| ptr[2] = b; |
| ptr[3] = a; |
| } |
| |
| #elif defined(__aarch64__) |
| #include <arm_neon.h> |
| |
| // Since we know we're using Clang, we can use its vector extensions. |
| template <typename T> using V = T __attribute__((ext_vector_type(4))); |
| using F = V<float >; |
| using I32 = V< int32_t>; |
| using U64 = V<uint64_t>; |
| using U32 = V<uint32_t>; |
| using U16 = V<uint16_t>; |
| using U8 = V<uint8_t >; |
| |
| // We polyfill a few routines that Clang doesn't build into ext_vector_types. |
| SI F mad(F f, F m, F a) { return vfmaq_f32(a,f,m); } |
| SI F min(F a, F b) { return vminq_f32(a,b); } |
| SI F max(F a, F b) { return vmaxq_f32(a,b); } |
| SI F abs_ (F v) { return vabsq_f32(v); } |
| SI F floor_(F v) { return vrndmq_f32(v); } |
| SI F rcp (F v) { auto e = vrecpeq_f32 (v); return vrecpsq_f32 (v,e ) * e; } |
| SI F rsqrt (F v) { auto e = vrsqrteq_f32(v); return vrsqrtsq_f32(v,e*e) * e; } |
| SI U32 round (F v, F scale) { return vcvtnq_u32_f32(v*scale); } |
| SI U16 pack(U32 v) { return __builtin_convertvector(v, U16); } |
| SI U8 pack(U16 v) { return __builtin_convertvector(v, U8); } |
| |
| SI F if_then_else(I32 c, F t, F e) { return vbslq_f32((U32)c,t,e); } |
| |
| template <typename T> |
| SI V<T> gather(const T* p, U32 ix) { |
| return {p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]]}; |
| } |
| |
| SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { |
| uint16x4x3_t rgb = vld3_u16(ptr); |
| *r = rgb.val[0]; |
| *g = rgb.val[1]; |
| *b = rgb.val[2]; |
| } |
| SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { |
| uint16x4x4_t rgba = vld4_u16(ptr); |
| *r = rgba.val[0]; |
| *g = rgba.val[1]; |
| *b = rgba.val[2]; |
| *a = rgba.val[3]; |
| } |
| SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { |
| vst4_u16(ptr, (uint16x4x4_t{{r,g,b,a}})); |
| } |
| |
| SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { |
| float32x4x4_t rgba = vld4q_f32(ptr); |
| *r = rgba.val[0]; |
| *g = rgba.val[1]; |
| *b = rgba.val[2]; |
| *a = rgba.val[3]; |
| } |
| SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { |
| vst4q_f32(ptr, (float32x4x4_t{{r,g,b,a}})); |
| } |
| |
| #elif defined(__arm__) |
| #if defined(__thumb2__) || !defined(__ARM_ARCH_7A__) || !defined(__ARM_VFPV4__) |
| #error On ARMv7, compile with -march=armv7-a -mfpu=neon-vfp4, without -mthumb. |
| #endif |
| #include <arm_neon.h> |
| |
| // We can pass {s0-s15} as arguments under AAPCS-VFP. We'll slice that as 8 d-registers. |
| template <typename T> using V = T __attribute__((ext_vector_type(2))); |
| using F = V<float >; |
| using I32 = V< int32_t>; |
| using U64 = V<uint64_t>; |
| using U32 = V<uint32_t>; |
| using U16 = V<uint16_t>; |
| using U8 = V<uint8_t >; |
| |
| SI F mad(F f, F m, F a) { return vfma_f32(a,f,m); } |
| SI F min(F a, F b) { return vmin_f32(a,b); } |
| SI F max(F a, F b) { return vmax_f32(a,b); } |
| SI F abs_ (F v) { return vabs_f32(v); } |
| SI F rcp (F v) { auto e = vrecpe_f32 (v); return vrecps_f32 (v,e ) * e; } |
| SI F rsqrt(F v) { auto e = vrsqrte_f32(v); return vrsqrts_f32(v,e*e) * e; } |
| SI U32 round(F v, F scale) { return vcvt_u32_f32(mad(v,scale,0.5f)); } |
| SI U16 pack(U32 v) { return __builtin_convertvector(v, U16); } |
| SI U8 pack(U16 v) { return __builtin_convertvector(v, U8); } |
| |
| SI F if_then_else(I32 c, F t, F e) { return vbsl_f32((U32)c,t,e); } |
| |
| SI F floor_(F v) { |
| F roundtrip = vcvt_f32_s32(vcvt_s32_f32(v)); |
| return roundtrip - if_then_else(roundtrip > v, 1.0_f, 0); |
| } |
| |
| template <typename T> |
| SI V<T> gather(const T* p, U32 ix) { |
| return {p[ix[0]], p[ix[1]]}; |
| } |
| |
| SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { |
| uint16x4x3_t rgb; |
| rgb = vld3_lane_u16(ptr + 0, rgb, 0); |
| rgb = vld3_lane_u16(ptr + 3, rgb, 1); |
| *r = unaligned_load<U16>(rgb.val+0); |
| *g = unaligned_load<U16>(rgb.val+1); |
| *b = unaligned_load<U16>(rgb.val+2); |
| } |
| SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { |
| uint16x4x4_t rgba; |
| rgba = vld4_lane_u16(ptr + 0, rgba, 0); |
| rgba = vld4_lane_u16(ptr + 4, rgba, 1); |
| *r = unaligned_load<U16>(rgba.val+0); |
| *g = unaligned_load<U16>(rgba.val+1); |
| *b = unaligned_load<U16>(rgba.val+2); |
| *a = unaligned_load<U16>(rgba.val+3); |
| } |
| SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { |
| uint16x4x4_t rgba = {{ |
| widen_cast<uint16x4_t>(r), |
| widen_cast<uint16x4_t>(g), |
| widen_cast<uint16x4_t>(b), |
| widen_cast<uint16x4_t>(a), |
| }}; |
| vst4_lane_u16(ptr + 0, rgba, 0); |
| vst4_lane_u16(ptr + 4, rgba, 1); |
| } |
| |
| SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { |
| float32x2x4_t rgba = vld4_f32(ptr); |
| *r = rgba.val[0]; |
| *g = rgba.val[1]; |
| *b = rgba.val[2]; |
| *a = rgba.val[3]; |
| } |
| SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { |
| vst4_f32(ptr, (float32x2x4_t{{r,g,b,a}})); |
| } |
| |
| |
| #elif defined(__AVX__) |
| #include <immintrin.h> |
| |
| // These are __m256 and __m256i, but friendlier and strongly-typed. |
| template <typename T> using V = T __attribute__((ext_vector_type(8))); |
| using F = V<float >; |
| using I32 = V< int32_t>; |
| using U64 = V<uint64_t>; |
| using U32 = V<uint32_t>; |
| using U16 = V<uint16_t>; |
| using U8 = V<uint8_t >; |
| |
| SI F mad(F f, F m, F a) { |
| #if defined(__FMA__) |
| return _mm256_fmadd_ps(f,m,a); |
| #else |
| return f*m+a; |
| #endif |
| } |
| |
| SI F min(F a, F b) { return _mm256_min_ps(a,b); } |
| SI F max(F a, F b) { return _mm256_max_ps(a,b); } |
| SI F abs_ (F v) { return _mm256_and_ps(v, 0-v); } |
| SI F floor_(F v) { return _mm256_floor_ps(v); } |
| SI F rcp (F v) { return _mm256_rcp_ps (v); } |
| SI F rsqrt (F v) { return _mm256_rsqrt_ps(v); } |
| SI U32 round (F v, F scale) { return _mm256_cvtps_epi32(v*scale); } |
| |
| SI U16 pack(U32 v) { |
| return _mm_packus_epi32(_mm256_extractf128_si256(v, 0), |
| _mm256_extractf128_si256(v, 1)); |
| } |
| SI U8 pack(U16 v) { |
| auto r = _mm_packus_epi16(v,v); |
| return unaligned_load<U8>(&r); |
| } |
| |
| SI F if_then_else(I32 c, F t, F e) { return _mm256_blendv_ps(e,t,c); } |
| |
| template <typename T> |
| SI V<T> gather(const T* p, U32 ix) { |
| return { p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]], |
| p[ix[4]], p[ix[5]], p[ix[6]], p[ix[7]], }; |
| } |
| #if defined(__AVX2__) |
| SI F gather(const float* p, U32 ix) { return _mm256_i32gather_ps (p, ix, 4); } |
| SI U32 gather(const uint32_t* p, U32 ix) { return _mm256_i32gather_epi32(p, ix, 4); } |
| SI U64 gather(const uint64_t* p, U32 ix) { |
| __m256i parts[] = { |
| _mm256_i32gather_epi64(p, _mm256_extracti128_si256(ix,0), 8), |
| _mm256_i32gather_epi64(p, _mm256_extracti128_si256(ix,1), 8), |
| }; |
| return bit_cast<U64>(parts); |
| } |
| #endif |
| |
| SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { |
| __m128i _0,_1,_2,_3,_4,_5,_6,_7; |
| if (__builtin_expect(tail,0)) { |
| auto load_rgb = [](const uint16_t* src) { |
| auto v = _mm_cvtsi32_si128(*(const uint32_t*)src); |
| return _mm_insert_epi16(v, src[2], 2); |
| }; |
| if (tail > 0) { _0 = load_rgb(ptr + 0); } |
| if (tail > 1) { _1 = load_rgb(ptr + 3); } |
| if (tail > 2) { _2 = load_rgb(ptr + 6); } |
| if (tail > 3) { _3 = load_rgb(ptr + 9); } |
| if (tail > 4) { _4 = load_rgb(ptr + 12); } |
| if (tail > 5) { _5 = load_rgb(ptr + 15); } |
| if (tail > 6) { _6 = load_rgb(ptr + 18); } |
| } else { |
| // Load 0+1, 2+3, 4+5 normally, and 6+7 backed up 4 bytes so we don't run over. |
| auto _01 = _mm_loadu_si128((const __m128i*)(ptr + 0)) ; |
| auto _23 = _mm_loadu_si128((const __m128i*)(ptr + 6)) ; |
| auto _45 = _mm_loadu_si128((const __m128i*)(ptr + 12)) ; |
| auto _67 = _mm_srli_si128(_mm_loadu_si128((const __m128i*)(ptr + 16)), 4); |
| _0 = _01; _1 = _mm_srli_si128(_01, 6), |
| _2 = _23; _3 = _mm_srli_si128(_23, 6), |
| _4 = _45; _5 = _mm_srli_si128(_45, 6), |
| _6 = _67; _7 = _mm_srli_si128(_67, 6); |
| } |
| |
| auto _02 = _mm_unpacklo_epi16(_0, _2), // r0 r2 g0 g2 b0 b2 xx xx |
| _13 = _mm_unpacklo_epi16(_1, _3), |
| _46 = _mm_unpacklo_epi16(_4, _6), |
| _57 = _mm_unpacklo_epi16(_5, _7); |
| |
| auto rg0123 = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 |
| bx0123 = _mm_unpackhi_epi16(_02, _13), // b0 b1 b2 b3 xx xx xx xx |
| rg4567 = _mm_unpacklo_epi16(_46, _57), |
| bx4567 = _mm_unpackhi_epi16(_46, _57); |
| |
| *r = _mm_unpacklo_epi64(rg0123, rg4567); |
| *g = _mm_unpackhi_epi64(rg0123, rg4567); |
| *b = _mm_unpacklo_epi64(bx0123, bx4567); |
| } |
| SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { |
| __m128i _01, _23, _45, _67; |
| if (__builtin_expect(tail,0)) { |
| auto src = (const double*)ptr; |
| _01 = _23 = _45 = _67 = _mm_setzero_si128(); |
| if (tail > 0) { _01 = _mm_loadl_pd(_01, src+0); } |
| if (tail > 1) { _01 = _mm_loadh_pd(_01, src+1); } |
| if (tail > 2) { _23 = _mm_loadl_pd(_23, src+2); } |
| if (tail > 3) { _23 = _mm_loadh_pd(_23, src+3); } |
| if (tail > 4) { _45 = _mm_loadl_pd(_45, src+4); } |
| if (tail > 5) { _45 = _mm_loadh_pd(_45, src+5); } |
| if (tail > 6) { _67 = _mm_loadl_pd(_67, src+6); } |
| } else { |
| _01 = _mm_loadu_si128(((__m128i*)ptr) + 0); |
| _23 = _mm_loadu_si128(((__m128i*)ptr) + 1); |
| _45 = _mm_loadu_si128(((__m128i*)ptr) + 2); |
| _67 = _mm_loadu_si128(((__m128i*)ptr) + 3); |
| } |
| |
| auto _02 = _mm_unpacklo_epi16(_01, _23), // r0 r2 g0 g2 b0 b2 a0 a2 |
| _13 = _mm_unpackhi_epi16(_01, _23), // r1 r3 g1 g3 b1 b3 a1 a3 |
| _46 = _mm_unpacklo_epi16(_45, _67), |
| _57 = _mm_unpackhi_epi16(_45, _67); |
| |
| auto rg0123 = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 |
| ba0123 = _mm_unpackhi_epi16(_02, _13), // b0 b1 b2 b3 a0 a1 a2 a3 |
| rg4567 = _mm_unpacklo_epi16(_46, _57), |
| ba4567 = _mm_unpackhi_epi16(_46, _57); |
| |
| *r = _mm_unpacklo_epi64(rg0123, rg4567); |
| *g = _mm_unpackhi_epi64(rg0123, rg4567); |
| *b = _mm_unpacklo_epi64(ba0123, ba4567); |
| *a = _mm_unpackhi_epi64(ba0123, ba4567); |
| } |
| SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { |
| auto rg0123 = _mm_unpacklo_epi16(r, g), // r0 g0 r1 g1 r2 g2 r3 g3 |
| rg4567 = _mm_unpackhi_epi16(r, g), // r4 g4 r5 g5 r6 g6 r7 g7 |
| ba0123 = _mm_unpacklo_epi16(b, a), |
| ba4567 = _mm_unpackhi_epi16(b, a); |
| |
| auto _01 = _mm_unpacklo_epi32(rg0123, ba0123), |
| _23 = _mm_unpackhi_epi32(rg0123, ba0123), |
| _45 = _mm_unpacklo_epi32(rg4567, ba4567), |
| _67 = _mm_unpackhi_epi32(rg4567, ba4567); |
| |
| if (__builtin_expect(tail,0)) { |
| auto dst = (double*)ptr; |
| if (tail > 0) { _mm_storel_pd(dst+0, _01); } |
| if (tail > 1) { _mm_storeh_pd(dst+1, _01); } |
| if (tail > 2) { _mm_storel_pd(dst+2, _23); } |
| if (tail > 3) { _mm_storeh_pd(dst+3, _23); } |
| if (tail > 4) { _mm_storel_pd(dst+4, _45); } |
| if (tail > 5) { _mm_storeh_pd(dst+5, _45); } |
| if (tail > 6) { _mm_storel_pd(dst+6, _67); } |
| } else { |
| _mm_storeu_si128((__m128i*)ptr + 0, _01); |
| _mm_storeu_si128((__m128i*)ptr + 1, _23); |
| _mm_storeu_si128((__m128i*)ptr + 2, _45); |
| _mm_storeu_si128((__m128i*)ptr + 3, _67); |
| } |
| } |
| |
| SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { |
| F _04, _15, _26, _37; |
| |
| switch (tail) { |
| case 0: _37 = _mm256_insertf128_ps(_37, _mm_loadu_ps(ptr+28), 1); |
| case 7: _26 = _mm256_insertf128_ps(_26, _mm_loadu_ps(ptr+24), 1); |
| case 6: _15 = _mm256_insertf128_ps(_15, _mm_loadu_ps(ptr+20), 1); |
| case 5: _04 = _mm256_insertf128_ps(_04, _mm_loadu_ps(ptr+16), 1); |
| case 4: _37 = _mm256_insertf128_ps(_37, _mm_loadu_ps(ptr+12), 0); |
| case 3: _26 = _mm256_insertf128_ps(_26, _mm_loadu_ps(ptr+ 8), 0); |
| case 2: _15 = _mm256_insertf128_ps(_15, _mm_loadu_ps(ptr+ 4), 0); |
| case 1: _04 = _mm256_insertf128_ps(_04, _mm_loadu_ps(ptr+ 0), 0); |
| } |
| |
| F rg0145 = _mm256_unpacklo_ps(_04,_15), // r0 r1 g0 g1 | r4 r5 g4 g5 |
| ba0145 = _mm256_unpackhi_ps(_04,_15), |
| rg2367 = _mm256_unpacklo_ps(_26,_37), |
| ba2367 = _mm256_unpackhi_ps(_26,_37); |
| |
| *r = _mm256_unpacklo_pd(rg0145, rg2367); |
| *g = _mm256_unpackhi_pd(rg0145, rg2367); |
| *b = _mm256_unpacklo_pd(ba0145, ba2367); |
| *a = _mm256_unpackhi_pd(ba0145, ba2367); |
| } |
| SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { |
| F rg0145 = _mm256_unpacklo_ps(r, g), // r0 g0 r1 g1 | r4 g4 r5 g5 |
| rg2367 = _mm256_unpackhi_ps(r, g), // r2 ... | r6 ... |
| ba0145 = _mm256_unpacklo_ps(b, a), // b0 a0 b1 a1 | b4 a4 b5 a5 |
| ba2367 = _mm256_unpackhi_ps(b, a); // b2 ... | b6 ... |
| |
| F _04 = _mm256_unpacklo_pd(rg0145, ba0145), // r0 g0 b0 a0 | r4 g4 b4 a4 |
| _15 = _mm256_unpackhi_pd(rg0145, ba0145), // r1 ... | r5 ... |
| _26 = _mm256_unpacklo_pd(rg2367, ba2367), // r2 ... | r6 ... |
| _37 = _mm256_unpackhi_pd(rg2367, ba2367); // r3 ... | r7 ... |
| |
| if (__builtin_expect(tail, 0)) { |
| if (tail > 0) { _mm_storeu_ps(ptr+ 0, _mm256_extractf128_ps(_04, 0)); } |
| if (tail > 1) { _mm_storeu_ps(ptr+ 4, _mm256_extractf128_ps(_15, 0)); } |
| if (tail > 2) { _mm_storeu_ps(ptr+ 8, _mm256_extractf128_ps(_26, 0)); } |
| if (tail > 3) { _mm_storeu_ps(ptr+12, _mm256_extractf128_ps(_37, 0)); } |
| if (tail > 4) { _mm_storeu_ps(ptr+16, _mm256_extractf128_ps(_04, 1)); } |
| if (tail > 5) { _mm_storeu_ps(ptr+20, _mm256_extractf128_ps(_15, 1)); } |
| if (tail > 6) { _mm_storeu_ps(ptr+24, _mm256_extractf128_ps(_26, 1)); } |
| } else { |
| F _01 = _mm256_permute2f128_ps(_04, _15, 32), // 32 == 0010 0000 == lo, lo |
| _23 = _mm256_permute2f128_ps(_26, _37, 32), |
| _45 = _mm256_permute2f128_ps(_04, _15, 49), // 49 == 0011 0001 == hi, hi |
| _67 = _mm256_permute2f128_ps(_26, _37, 49); |
| _mm256_storeu_ps(ptr+ 0, _01); |
| _mm256_storeu_ps(ptr+ 8, _23); |
| _mm256_storeu_ps(ptr+16, _45); |
| _mm256_storeu_ps(ptr+24, _67); |
| } |
| } |
| |
| #elif defined(__SSE2__) |
| #include <immintrin.h> |
| |
| template <typename T> using V = T __attribute__((ext_vector_type(4))); |
| using F = V<float >; |
| using I32 = V< int32_t>; |
| using U64 = V<uint64_t>; |
| using U32 = V<uint32_t>; |
| using U16 = V<uint16_t>; |
| using U8 = V<uint8_t >; |
| |
| SI F mad(F f, F m, F a) { return f*m+a; } |
| SI F min(F a, F b) { return _mm_min_ps(a,b); } |
| SI F max(F a, F b) { return _mm_max_ps(a,b); } |
| SI F abs_(F v) { return _mm_and_ps(v, 0-v); } |
| SI F rcp (F v) { return _mm_rcp_ps (v); } |
| SI F rsqrt(F v) { return _mm_rsqrt_ps(v); } |
| SI U32 round(F v, F scale) { return _mm_cvtps_epi32(v*scale); } |
| |
| SI U16 pack(U32 v) { |
| #if defined(__SSE4_1__) |
| auto p = _mm_packus_epi32(v,v); |
| #else |
| // Sign extend so that _mm_packs_epi32() does the pack we want. |
| auto p = _mm_srai_epi32(_mm_slli_epi32(v, 16), 16); |
| p = _mm_packs_epi32(p,p); |
| #endif |
| return unaligned_load<U16>(&p); // We have two copies. Return (the lower) one. |
| } |
| SI U8 pack(U16 v) { |
| auto r = widen_cast<__m128i>(v); |
| r = _mm_packus_epi16(r,r); |
| return unaligned_load<U8>(&r); |
| } |
| |
| SI F if_then_else(I32 c, F t, F e) { |
| return _mm_or_ps(_mm_and_ps(c, t), _mm_andnot_ps(c, e)); |
| } |
| |
| SI F floor_(F v) { |
| #if defined(__SSE4_1__) |
| return _mm_floor_ps(v); |
| #else |
| F roundtrip = _mm_cvtepi32_ps(_mm_cvttps_epi32(v)); |
| return roundtrip - if_then_else(roundtrip > v, 1.0_f, 0); |
| #endif |
| } |
| |
| template <typename T> |
| SI V<T> gather(const T* p, U32 ix) { |
| return {p[ix[0]], p[ix[1]], p[ix[2]], p[ix[3]]}; |
| } |
| |
| SI void load3(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b) { |
| // Load slightly weirdly to make sure we don't load past the end of 4x48 bits. |
| auto _01 = _mm_loadu_si128((const __m128i*)(ptr + 0)) , |
| _23 = _mm_srli_si128(_mm_loadu_si128((const __m128i*)(ptr + 4)), 4); |
| |
| // Each _N holds R,G,B for pixel N in its lower 3 lanes (upper 5 are ignored). |
| auto _0 = _01, _1 = _mm_srli_si128(_01, 6), |
| _2 = _23, _3 = _mm_srli_si128(_23, 6); |
| |
| // De-interlace to R,G,B. |
| auto _02 = _mm_unpacklo_epi16(_0, _2), // r0 r2 g0 g2 b0 b2 xx xx |
| _13 = _mm_unpacklo_epi16(_1, _3); // r1 r3 g1 g3 b1 b3 xx xx |
| |
| auto R = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 |
| G = _mm_srli_si128(R, 8), |
| B = _mm_unpackhi_epi16(_02, _13); // b0 b1 b2 b3 xx xx xx xx |
| |
| *r = unaligned_load<U16>(&R); |
| *g = unaligned_load<U16>(&G); |
| *b = unaligned_load<U16>(&B); |
| } |
| SI void load4(const uint16_t* ptr, size_t tail, U16* r, U16* g, U16* b, U16* a) { |
| auto _01 = _mm_loadu_si128(((__m128i*)ptr) + 0), |
| _23 = _mm_loadu_si128(((__m128i*)ptr) + 1); |
| |
| auto _02 = _mm_unpacklo_epi16(_01, _23), // r0 r2 g0 g2 b0 b2 a0 a2 |
| _13 = _mm_unpackhi_epi16(_01, _23); // r1 r3 g1 g3 b1 b3 a1 a3 |
| |
| auto rg = _mm_unpacklo_epi16(_02, _13), // r0 r1 r2 r3 g0 g1 g2 g3 |
| ba = _mm_unpackhi_epi16(_02, _13); // b0 b1 b2 b3 a0 a1 a2 a3 |
| |
| *r = unaligned_load<U16>((uint16_t*)&rg + 0); |
| *g = unaligned_load<U16>((uint16_t*)&rg + 4); |
| *b = unaligned_load<U16>((uint16_t*)&ba + 0); |
| *a = unaligned_load<U16>((uint16_t*)&ba + 4); |
| } |
| SI void store4(uint16_t* ptr, size_t tail, U16 r, U16 g, U16 b, U16 a) { |
| auto rg = _mm_unpacklo_epi16(widen_cast<__m128i>(r), widen_cast<__m128i>(g)), |
| ba = _mm_unpacklo_epi16(widen_cast<__m128i>(b), widen_cast<__m128i>(a)); |
| _mm_storeu_si128((__m128i*)ptr + 0, _mm_unpacklo_epi32(rg, ba)); |
| _mm_storeu_si128((__m128i*)ptr + 1, _mm_unpackhi_epi32(rg, ba)); |
| } |
| |
| SI void load4(const float* ptr, size_t tail, F* r, F* g, F* b, F* a) { |
| auto _0 = _mm_loadu_ps(ptr+ 0), |
| _1 = _mm_loadu_ps(ptr+ 4), |
| _2 = _mm_loadu_ps(ptr+ 8), |
| _3 = _mm_loadu_ps(ptr+12); |
| _MM_TRANSPOSE4_PS(_0,_1,_2,_3); |
| *r = _0; |
| *g = _1; |
| *b = _2; |
| *a = _3; |
| } |
| SI void store4(float* ptr, size_t tail, F r, F g, F b, F a) { |
| _MM_TRANSPOSE4_PS(r,g,b,a); |
| _mm_storeu_ps(ptr+ 0, r); |
| _mm_storeu_ps(ptr+ 4, g); |
| _mm_storeu_ps(ptr+ 8, b); |
| _mm_storeu_ps(ptr+12, a); |
| } |
| #endif |
| |
| // We need to be a careful with casts. |
| // (F)x means cast x to float in the portable path, but bit_cast x to float in the others. |
| // These named casts and bit_cast() are always what they seem to be. |
| #if defined(JUMPER) |
| SI F cast (U32 v) { return __builtin_convertvector((I32)v, F); } |
| SI U32 trunc_(F v) { return (U32)__builtin_convertvector( v, I32); } |
| SI U32 expand(U16 v) { return __builtin_convertvector( v, U32); } |
| SI U32 expand(U8 v) { return __builtin_convertvector( v, U32); } |
| #else |
| SI F cast (U32 v) { return (F)v; } |
| SI U32 trunc_(F v) { return (U32)v; } |
| SI U32 expand(U16 v) { return (U32)v; } |
| SI U32 expand(U8 v) { return (U32)v; } |
| #endif |
| |
| template <typename V> |
| SI V if_then_else(I32 c, V t, V e) { |
| return bit_cast<V>(if_then_else(c, bit_cast<F>(t), bit_cast<F>(e))); |
| } |
| |
| SI U16 bswap(U16 x) { |
| #if defined(JUMPER) && defined(__SSE2__) && !defined(__AVX__) |
| // Somewhat inexplicably Clang decides to do (x<<8) | (x>>8) in 32-bit lanes |
| // when generating code for SSE2 and SSE4.1. We'll do it manually... |
| auto v = widen_cast<__m128i>(x); |
| v = _mm_slli_epi16(v,8) | _mm_srli_epi16(v,8); |
| return unaligned_load<U16>(&v); |
| #else |
| return (x<<8) | (x>>8); |
| #endif |
| } |
| |
| SI F fract(F v) { return v - floor_(v); } |
| |
| // See http://www.machinedlearnings.com/2011/06/fast-approximate-logarithm-exponential.html. |
| SI F approx_log2(F x) { |
| // e - 127 is a fair approximation of log2(x) in its own right... |
| F e = cast(bit_cast<U32>(x)) * C(1.0f / (1<<23)); |
| |
| // ... but using the mantissa to refine its error is _much_ better. |
| F m = bit_cast<F>((bit_cast<U32>(x) & 0x007fffff_i) | 0x3f000000_i); |
| return e |
| - 124.225514990_f |
| - 1.498030302_f * m |
| - 1.725879990_f / (0.3520887068_f + m); |
| } |
| SI F approx_pow2(F x) { |
| F f = fract(x); |
| return bit_cast<F>(round(C(1.0f * (1<<23)), |
| x + 121.274057500_f |
| - 1.490129070_f * f |
| + 27.728023300_f / (4.84252568_f - f))); |
| } |
| |
| SI F approx_powf(F x, F y) { |
| return approx_pow2(approx_log2(x) * y); |
| } |
| |
| SI F from_half(U16 h) { |
| #if defined(JUMPER) && defined(__aarch64__) |
| return vcvt_f32_f16(h); |
| |
| #elif defined(JUMPER) && defined(__arm__) |
| auto v = widen_cast<uint16x4_t>(h); |
| return vget_low_f32(vcvt_f32_f16(v)); |
| |
| #elif defined(JUMPER) && defined(__AVX2__) |
| return _mm256_cvtph_ps(h); |
| |
| #else |
| // Remember, a half is 1-5-10 (sign-exponent-mantissa) with 15 exponent bias. |
| U32 sem = expand(h), |
| s = sem & 0x8000_i, |
| em = sem ^ s; |
| |
| // Convert to 1-8-23 float with 127 bias, flushing denorm halfs (including zero) to zero. |
| auto denorm = (I32)em < 0x0400_i; // I32 comparison is often quicker, and always safe here. |
| return if_then_else(denorm, F(0) |
| , bit_cast<F>( (s<<16) + (em<<13) + C((127-15)<<23) )); |
| #endif |
| } |
| |
| SI U16 to_half(F f) { |
| #if defined(JUMPER) && defined(__aarch64__) |
| return vcvt_f16_f32(f); |
| |
| #elif defined(JUMPER) && defined(__arm__) |
| auto v = widen_cast<float32x4_t>(f); |
| uint16x4_t h = vcvt_f16_f32(v); |
| return unaligned_load<U16>(&h); |
| |
| #elif defined(JUMPER) && defined(__AVX2__) |
| return _mm256_cvtps_ph(f, _MM_FROUND_CUR_DIRECTION); |
| |
| #else |
| // Remember, a float is 1-8-23 (sign-exponent-mantissa) with 127 exponent bias. |
| U32 sem = bit_cast<U32>(f), |
| s = sem & 0x80000000_i, |
| em = sem ^ s; |
| |
| // Convert to 1-5-10 half with 15 bias, flushing denorm halfs (including zero) to zero. |
| auto denorm = (I32)em < 0x38800000_i; // I32 comparison is often quicker, and always safe here. |
| return pack(if_then_else(denorm, U32(0) |
| , (s>>16) + (em>>13) - C((127-15)<<10))); |
| #endif |
| } |
| |
| |
| |
| #endif//SkJumper_vectors_DEFINED |
