| // Copyright (c) Facebook, Inc. and its affiliates. |
| // All rights reserved. |
| // |
| // Copyright 2019 Google LLC |
| // |
| // This source code is licensed under the BSD-style license found in the |
| // LICENSE file in the root directory of this source tree. |
| |
| #include <assert.h> |
| |
| #include <immintrin.h> |
| |
| #include <xnnpack/gemm.h> |
| #include <xnnpack/math.h> |
| |
| |
| static inline __m128i sse_reduce4_i32(__m128i x, __m128i y, __m128i z, __m128i w) { |
| #if defined(__SSSE3__) && !defined(__ANDROID__) |
| // xxyy = ( y2 + y3, y0 + y1, x2 + x3, x0 + x1 ) |
| const __m128i xxyy = _mm_hadd_epi32(x, y); |
| // zzww = ( w2 + w3, w0 + w1, z2 + z3, z0 + z1 ) |
| const __m128i zzww = _mm_hadd_epi32(z, w); |
| // xyzw = ( w0 + w1 + w2 + w3, y0 + y1 + y2 + y3, z0 + z1 + z2 + z3, x0 + x1 + x2 + x3 ) |
| return _mm_hadd_epi32(xxyy, zzww); |
| #else |
| // xzxz = ( z1 + z3, x1 + x3, z0 + z2, x0 + x2 ) |
| const __m128i xzxz = _mm_add_epi32(_mm_unpacklo_epi32(x, z), _mm_unpackhi_epi32(x, z)); |
| // ywyw = ( w1 + w3, y1 + y3, w0 + w2, y0 + y2 ) |
| const __m128i ywyw = _mm_add_epi32(_mm_unpacklo_epi32(y, w), _mm_unpackhi_epi32(y, w)); |
| // xyzw = ( w0 + w2 + w1 + w3, y0 + y2 + y1 + y3, z0 + z2 + z1 + z3, x0 + x2 + x1 + x3 ) |
| return _mm_add_epi32(_mm_unpacklo_epi32(xzxz, ywyw), _mm_unpackhi_epi32(xzxz, ywyw)); |
| #endif |
| } |
| |
| void xnn_qu8_gemm_minmax_ukernel_2x4c8__sse2( |
| size_t mr, |
| size_t nc, |
| size_t kc, |
| const uint8_t* restrict a, |
| size_t a_stride, |
| const void* restrict w, |
| uint8_t* restrict c, |
| size_t cm_stride, |
| size_t cn_stride, |
| const union xnn_qu8_gemm_params params[restrict XNN_MIN_ELEMENTS(1)]) XNN_DISABLE_TSAN |
| { |
| assert(mr != 0); |
| assert(mr <= 2); |
| assert(nc != 0); |
| assert(kc != 0); |
| assert(kc % sizeof(int8_t) == 0); |
| assert(a != NULL); |
| assert(w != NULL); |
| assert(c != NULL); |
| |
| kc = round_up_po2(kc, 8); |
| const uint8_t* a0 = a; |
| uint8_t* c0 = c; |
| const uint8_t* a1 = (const uint8_t*) ((uintptr_t) a0 + a_stride); |
| uint8_t* c1 = (uint8_t*) ((uintptr_t) c0 + cm_stride); |
| if (mr != 2) { |
| a1 = a0; |
| c1 = c0; |
| } |
| |
| const __m128i vb_zero_point = _mm_load_si128((const __m128i*) params->sse2.kernel_zero_point); |
| |
| do { |
| __m128i vacc00 = _mm_cvtsi32_si128((int) ((const int32_t*) w)[0]); |
| __m128i vacc01 = _mm_cvtsi32_si128((int) ((const int32_t*) w)[1]); |
| __m128i vacc02 = _mm_cvtsi32_si128((int) ((const int32_t*) w)[2]); |
| __m128i vacc03 = _mm_cvtsi32_si128((int) ((const int32_t*) w)[3]); |
| __m128i vacc10 = vacc00; |
| __m128i vacc11 = vacc01; |
| __m128i vacc12 = vacc02; |
| __m128i vacc13 = vacc03; |
| w = (const void*) ((uintptr_t) w + 16); |
| |
| const __m128i vzero = _mm_setzero_si128(); |
| for (size_t k = 0; k < kc; k += 8 * sizeof(uint8_t)) { |
| const __m128i va0 = _mm_loadl_epi64((const __m128i*) a0); |
| const __m128i vxa0 = _mm_unpacklo_epi8(va0, vzero); |
| a0 += 8; |
| const __m128i va1 = _mm_loadl_epi64((const __m128i*) a1); |
| const __m128i vxa1 = _mm_unpacklo_epi8(va1, vzero); |
| a1 += 8; |
| |
| const __m128i vb0 = _mm_loadl_epi64((const __m128i*) w); |
| const __m128i vxb0 = _mm_sub_epi16(_mm_unpacklo_epi8(vb0, vzero), vb_zero_point); |
| const __m128i vb1 = _mm_loadl_epi64((const __m128i*) ((uintptr_t) w + 8)); |
| const __m128i vxb1 = _mm_sub_epi16(_mm_unpacklo_epi8(vb1, vzero), vb_zero_point); |
| const __m128i vb2 = _mm_loadl_epi64((const __m128i*) ((uintptr_t) w + 16)); |
| const __m128i vxb2 = _mm_sub_epi16(_mm_unpacklo_epi8(vb2, vzero), vb_zero_point); |
| const __m128i vb3 = _mm_loadl_epi64((const __m128i*) ((uintptr_t) w + 24)); |
| const __m128i vxb3 = _mm_sub_epi16(_mm_unpacklo_epi8(vb3, vzero), vb_zero_point); |
| w = (const void*) ((uintptr_t) w + 32); |
| |
| vacc00 = _mm_add_epi32(vacc00, _mm_madd_epi16(vxa0, vxb0)); |
| vacc01 = _mm_add_epi32(vacc01, _mm_madd_epi16(vxa0, vxb1)); |
| vacc02 = _mm_add_epi32(vacc02, _mm_madd_epi16(vxa0, vxb2)); |
| vacc03 = _mm_add_epi32(vacc03, _mm_madd_epi16(vxa0, vxb3)); |
| vacc10 = _mm_add_epi32(vacc10, _mm_madd_epi16(vxa1, vxb0)); |
| vacc11 = _mm_add_epi32(vacc11, _mm_madd_epi16(vxa1, vxb1)); |
| vacc12 = _mm_add_epi32(vacc12, _mm_madd_epi16(vxa1, vxb2)); |
| vacc13 = _mm_add_epi32(vacc13, _mm_madd_epi16(vxa1, vxb3)); |
| } |
| |
| __m128i vacc0x0123 = sse_reduce4_i32(vacc00, vacc01, vacc02, vacc03); |
| __m128i vacc1x0123 = sse_reduce4_i32(vacc10, vacc11, vacc12, vacc13); |
| |
| const __m128i vmultiplier = _mm_load_si128((const __m128i*) params->sse2.multiplier); |
| const __m128i vrounding = _mm_load_si128((const __m128i*) params->sse2.rounding); |
| |
| const __m128i vnmask0x0123 = _mm_cmpgt_epi32(_mm_setzero_si128(), vacc0x0123); |
| const __m128i vnmask1x0123 = _mm_cmpgt_epi32(_mm_setzero_si128(), vacc1x0123); |
| |
| const __m128i vabsacc0x0123 = _mm_sub_epi32(_mm_xor_si128(vacc0x0123, vnmask0x0123), vnmask0x0123); |
| const __m128i vabsacc1x0123 = _mm_sub_epi32(_mm_xor_si128(vacc1x0123, vnmask1x0123), vnmask1x0123); |
| |
| const __m128i vabsacc0x1032 = _mm_shuffle_epi32(vabsacc0x0123, _MM_SHUFFLE(2, 3, 0, 1)); |
| const __m128i vabsacc1x1032 = _mm_shuffle_epi32(vabsacc1x0123, _MM_SHUFFLE(2, 3, 0, 1)); |
| |
| const __m128i vabsprod0x02 = _mm_mul_epu32(vabsacc0x0123, vmultiplier); |
| const __m128i vabsprod1x02 = _mm_mul_epu32(vabsacc1x0123, vmultiplier); |
| |
| const __m128i vnmask0x02 = _mm_shuffle_epi32(vnmask0x0123, _MM_SHUFFLE(2, 2, 0, 0)); |
| const __m128i vnmask1x02 = _mm_shuffle_epi32(vnmask1x0123, _MM_SHUFFLE(2, 2, 0, 0)); |
| |
| const __m128i vprod0x02 = _mm_sub_epi64(_mm_xor_si128(vabsprod0x02, vnmask0x02), vnmask0x02); |
| const __m128i vprod1x02 = _mm_sub_epi64(_mm_xor_si128(vabsprod1x02, vnmask1x02), vnmask1x02); |
| |
| const __m128i vq31prod0x02 = _mm_srli_epi64(_mm_add_epi64(vprod0x02, vrounding), 31); |
| const __m128i vq31prod1x02 = _mm_srli_epi64(_mm_add_epi64(vprod1x02, vrounding), 31); |
| |
| const __m128i vabsprod0x13 = _mm_mul_epu32(vabsacc0x1032, vmultiplier); |
| const __m128i vabsprod1x13 = _mm_mul_epu32(vabsacc1x1032, vmultiplier); |
| |
| const __m128i vnmask0x13 = _mm_shuffle_epi32(vnmask0x0123, _MM_SHUFFLE(3, 3, 1, 1)); |
| const __m128i vnmask1x13 = _mm_shuffle_epi32(vnmask1x0123, _MM_SHUFFLE(3, 3, 1, 1)); |
| |
| const __m128i vprod0x13 = _mm_sub_epi64(_mm_xor_si128(vabsprod0x13, vnmask0x13), vnmask0x13); |
| const __m128i vprod1x13 = _mm_sub_epi64(_mm_xor_si128(vabsprod1x13, vnmask1x13), vnmask1x13); |
| |
| const __m128i vq31prod0x13 = _mm_srli_epi64(_mm_add_epi64(vprod0x13, vrounding), 31); |
| const __m128i vq31prod1x13 = _mm_srli_epi64(_mm_add_epi64(vprod1x13, vrounding), 31); |
| |
| const __m128i vq31prod0x0213 = _mm_castps_si128(_mm_shuffle_ps( |
| _mm_castsi128_ps(vq31prod0x02), _mm_castsi128_ps(vq31prod0x13), _MM_SHUFFLE(2, 0, 2, 0))); |
| const __m128i vq31prod1x0213 = _mm_castps_si128(_mm_shuffle_ps( |
| _mm_castsi128_ps(vq31prod1x02), _mm_castsi128_ps(vq31prod1x13), _MM_SHUFFLE(2, 0, 2, 0))); |
| |
| const __m128i vq31prod0x0123 = _mm_shuffle_epi32(vq31prod0x0213, _MM_SHUFFLE(3, 1, 2, 0)); |
| const __m128i vq31prod1x0123 = _mm_shuffle_epi32(vq31prod1x0213, _MM_SHUFFLE(3, 1, 2, 0)); |
| |
| const __m128i vremainder_mask = _mm_load_si128((const __m128i*) params->sse2.remainder_mask); |
| |
| const __m128i vrem0x0123 = |
| _mm_add_epi32(_mm_and_si128(vq31prod0x0123, vremainder_mask), _mm_cmpgt_epi32(_mm_setzero_si128(), vq31prod0x0123)); |
| const __m128i vrem1x0123 = |
| _mm_add_epi32(_mm_and_si128(vq31prod1x0123, vremainder_mask), _mm_cmpgt_epi32(_mm_setzero_si128(), vq31prod1x0123)); |
| |
| const __m128i vremainder_threshold = _mm_load_si128((const __m128i*) params->sse2.remainder_threshold); |
| const __m128i vshift = _mm_load_si128((const __m128i*) params->sse2.shift); |
| |
| vacc0x0123 = |
| _mm_sub_epi32(_mm_sra_epi32(vq31prod0x0123, vshift), _mm_cmpgt_epi32(vrem0x0123, vremainder_threshold)); |
| vacc1x0123 = |
| _mm_sub_epi32(_mm_sra_epi32(vq31prod1x0123, vshift), _mm_cmpgt_epi32(vrem1x0123, vremainder_threshold)); |
| |
| const __m128i voutput_zero_point = _mm_load_si128((const __m128i*) params->sse2.output_zero_point); |
| const __m128i vacc01x0123 = _mm_adds_epi16(_mm_packs_epi32(vacc0x0123, vacc1x0123), voutput_zero_point); |
| __m128i vout = _mm_packus_epi16(vacc01x0123, vacc01x0123); |
| vout = _mm_min_epu8(vout, _mm_load_si128((const __m128i*) params->sse2.output_max)); |
| vout = _mm_max_epu8(vout, _mm_load_si128((const __m128i*) params->sse2.output_min)); |
| |
| if (nc >= 4) { |
| *((uint32_t*) c0) = (uint32_t) _mm_cvtsi128_si32(vout); |
| *((uint32_t*) c1) = (uint32_t) _mm_cvtsi128_si32(_mm_srli_epi64(vout, 32)); |
| |
| a0 = (const uint8_t*) ((uintptr_t) a0 - kc); |
| a1 = (const uint8_t*) ((uintptr_t) a1 - kc); |
| |
| c0 = (uint8_t*) ((uintptr_t) c0 + cn_stride); |
| c1 = (uint8_t*) ((uintptr_t) c1 + cn_stride); |
| |
| nc -= 4; |
| } else { |
| if (nc & 2) { |
| *((uint16_t*) c0) = (uint16_t) _mm_extract_epi16(vout, 0); |
| c0 += 2; |
| *((uint16_t*) c1) = (uint16_t) _mm_extract_epi16(vout, 2); |
| c1 += 2; |
| vout = _mm_srli_epi32(vout, 16); |
| } |
| if (nc & 1) { |
| *((uint8_t*) c0) = (uint8_t) _mm_cvtsi128_si32(vout); |
| *((uint8_t*) c1) = (uint8_t) _mm_extract_epi16(vout, 2); |
| } |
| |
| nc = 0; |
| } |
| } while (nc != 0); |
| } |