From 18c9a8b8905304cf5f8fc15825769046a3144866 Mon Sep 17 00:00:00 2001 From: Sebastiano Tronto Date: Sun, 18 Aug 2024 14:26:45 +0200 Subject: Reorganized folder structure --- src/arch/avx2.h | 319 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 319 insertions(+) create mode 100644 src/arch/avx2.h (limited to 'src/arch/avx2.h') diff --git a/src/arch/avx2.h b/src/arch/avx2.h new file mode 100644 index 0000000..59a0d6c --- /dev/null +++ b/src/arch/avx2.h @@ -0,0 +1,319 @@ +#define _co2_avx2 _mm256_set_epi64x(0, 0, 0, INT64_C(0x6060606060606060)) +#define _cocw_avx2 _mm256_set_epi64x(0, 0, 0, INT64_C(0x2020202020202020)) +#define _cp_avx2 _mm256_set_epi64x(0, 0, 0, INT64_C(0x0707070707070707)) +#define _ep_avx2 \ + _mm256_set_epi64x(INT64_C(0x0F0F0F0F), INT64_C(0x0F0F0F0F0F0F0F0F), 0, 0) +#define _eo_avx2 \ + _mm256_set_epi64x(INT64_C(0x10101010), INT64_C(0x1010101010101010), 0, 0) + +#define static_cube(c_ufr, c_ubl, c_dfl, c_dbr, c_ufl, c_ubr, c_dfr, c_dbl, \ + e_uf, e_ub, e_db, e_df, e_ur, e_ul, e_dl, e_dr, e_fr, e_fl, e_bl, e_br) \ + _mm256_set_epi8(0, 0, 0, 0, e_br, e_bl, e_fl, e_fr, \ + e_dr, e_dl, e_ul, e_ur, e_df, e_db, e_ub, e_uf, \ + 0, 0, 0, 0, 0, 0, 0, 0, \ + c_dbl, c_dfr, c_ubr, c_ufl, c_dbr, c_dfl, c_ubl, c_ufr) +#define zero _mm256_set_epi64x(0, 0, 0, 0) +#define solved static_cube( \ + 0, 1, 2, 3, 4, 5, 6, 7, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11) + +_static void +pieces(cube_t *cube, uint8_t c[static 8], uint8_t e[static 12]) +{ + uint8_t aux[32]; + + _mm256_storeu_si256((__m256i_u *)aux, *cube); + memcpy(c, aux, 8); + memcpy(e, aux+16, 12); +} + +_static_inline bool +equal(cube_t c1, cube_t c2) +{ + int32_t mask; + __m256i cmp; + + cmp = _mm256_cmpeq_epi8(c1, c2); + mask = _mm256_movemask_epi8(cmp); + + return mask == ~0; +} + +_static_inline cube_t +invertco(cube_t c) +{ + cube_t co, shleft, shright, summed, newco, cleanco, ret; + + co = _mm256_and_si256(c, _co2_avx2); + shleft = _mm256_slli_epi32(co, 1); + shright = _mm256_srli_epi32(co, 1); + summed = _mm256_or_si256(shleft, shright); + newco = _mm256_and_si256(summed, _co2_avx2); + cleanco = _mm256_xor_si256(c, co); + ret = _mm256_or_si256(cleanco, newco); + + return ret; +} + +_static_inline cube_t +compose_epcpeo(cube_t c1, cube_t c2) +{ + cube_t b, s, eo2; + + /* Permute and clean unused bits */ + s = _mm256_shuffle_epi8(c1, c2); + b = _mm256_set_epi8( + ~0, ~0, ~0, ~0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0, 0, 0, 0, 0, 0, 0, 0 + ); + s = _mm256_andnot_si256(b, s); + + /* Change EO */ + eo2 = _mm256_and_si256(c2, _eo_avx2); + s = _mm256_xor_si256(s, eo2); + + return s; +} + +_static_inline cube_t +compose_edges(cube_t c1, cube_t c2) +{ + return compose_epcpeo(c1, c2); +} + +_static_inline cube_t +compose_corners(cube_t c1, cube_t c2) +{ + /* + * We do a full compose. Minor optimizations are possible, like + * saving one instruction by not doing EO, but it should not + * be significant. + */ + return compose(c1, c2); +} + +_static_inline cube_t +compose(cube_t c1, cube_t c2) +{ + cube_t s, co1, co2, aux, auy1, auy2, auz1, auz2; + + s = compose_epcpeo(c1, c2); + + /* Change CO */ + co1 = _mm256_and_si256(s, _co2_avx2); + co2 = _mm256_and_si256(c2, _co2_avx2); + aux = _mm256_add_epi8(co1, co2); + auy1 = _mm256_add_epi8(aux, _cocw_avx2); + auy2 = _mm256_srli_epi32(auy1, 2); + auz1 = _mm256_add_epi8(aux, auy2); + auz2 = _mm256_and_si256(auz1, _co2_avx2); + + /* Put together */ + s = _mm256_andnot_si256(_co2_avx2, s); + s = _mm256_or_si256(s, auz2); + + return s; +} + +_static_inline cube_t +cleanaftershuffle(cube_t c) +{ + __m256i b; + + b = _mm256_set_epi8( + ~0, ~0, ~0, ~0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + ~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0, 0, 0, 0, 0, 0, 0, 0 + ); + + return _mm256_andnot_si256(b, c); +} + +_static_inline cube_t +inverse(cube_t c) +{ + /* Method taken from Andrew Skalski's vcube[1]. The addition sequence + * was generated using [2]. + * [1] https://github.com/Voltara/vcube + * [2] http://wwwhomes.uni-bielefeld.de/achim/addition_chain.html + */ + cube_t v3, vi, vo, vp, ret; + + v3 = _mm256_shuffle_epi8(c, c); + v3 = _mm256_shuffle_epi8(v3, c); + vi = _mm256_shuffle_epi8(v3, v3); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, v3); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, c); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, v3); + vi = _mm256_shuffle_epi8(vi, vi); + vi = _mm256_shuffle_epi8(vi, c); + + vo = _mm256_and_si256(c, _mm256_or_si256(_eo_avx2, _co2_avx2)); + vo = _mm256_shuffle_epi8(vo, vi); + vp = _mm256_andnot_si256(_mm256_or_si256(_eo_avx2, _co2_avx2), vi); + ret = _mm256_or_si256(vp, vo); + ret = cleanaftershuffle(ret); + + return invertco(ret); +} + +_static_inline int64_t +coord_co(cube_t c) +{ + cube_t co; + int64_t mem[4], ret, i, p; + + co = _mm256_and_si256(c, _co2_avx2); + _mm256_storeu_si256((__m256i *)mem, co); + + mem[0] >>= 5; + for (i = 0, ret = 0, p = 1; i < 7; i++, mem[0] >>= 8, p *= 3) + ret += (mem[0] & 3) * p; + + return ret; +} + +_static_inline int64_t +coord_csep(cube_t c) +{ + cube_t cp, shifted; + int64_t mask; + + cp = _mm256_and_si256(c, _cp_avx2); + shifted = _mm256_slli_epi32(cp, 5); + mask = _mm256_movemask_epi8(shifted); + + return mask & 0x7F; +} + +_static_inline int64_t +coord_cocsep(cube_t c) +{ + return (coord_co(c) << 7) + coord_csep(c); +} + +_static_inline int64_t +coord_eo(cube_t c) +{ + cube_t eo, shifted; + int64_t mask; + + eo = _mm256_and_si256(c, _eo_avx2); + shifted = _mm256_slli_epi32(eo, 3); + mask = _mm256_movemask_epi8(shifted); + + return mask >> 17; +} + +_static_inline int64_t +coord_esep(cube_t c) +{ + cube_t ep; + int64_t e, mem[4], i, j, jj, k, l, ret1, ret2, bit1, bit2, is1; + + ep = _mm256_and_si256(c, _ep_avx2); + _mm256_storeu_si256((__m256i *)mem, ep); + + mem[3] <<= 8; + ret1 = ret2 = 0; + k = l = 4; + for (i = 0, j = 0; i < 12; i++, mem[i/8 + 2] >>= 8) { + e = mem[i/8 + 2]; + + bit1 = (e & _esepbit1) >> 2; + bit2 = (e & _esepbit2) >> 3; + is1 = (1 - bit2) * bit1; + + ret1 += bit2 * binomial[11-i][k]; + k -= bit2; + + jj = j < 8; + ret2 += jj * is1 * binomial[7-(j*jj)][l]; + l -= is1; + j += (1-bit2); + } + + return ret1 * 70 + ret2; +} + +_static_inline void +copy_corners(cube_t *dest, cube_t src) +{ + *dest = _mm256_blend_epi32(*dest, src, 0x0F); +} + +_static_inline void +copy_edges(cube_t *dest, cube_t src) +{ + *dest = _mm256_blend_epi32(*dest, src, 0xF0); +} + +_static_inline void +set_eo(cube_t *cube, int64_t eo) +{ + int64_t eo12, eotop, eobot; + __m256i veo; + + eo12 = (eo << 1) + (_mm_popcnt_u64(eo) % 2); + eotop = (eo12 & (1 << 11)) << 17 | + (eo12 & (1 << 10)) << 10 | + (eo12 & (1 << 9)) << 3 | + (eo12 & (1 << 8)) >> 4; + eobot = (eo12 & (1 << 7)) << 53 | + (eo12 & (1 << 6)) << 46 | + (eo12 & (1 << 5)) << 39 | + (eo12 & (1 << 4)) << 32 | + (eo12 & (1 << 3)) << 25 | + (eo12 & (1 << 2)) << 18 | + (eo12 & (1 << 1)) << 11 | + (eo12 & 1) << 4; + veo = _mm256_set_epi64x(eotop, eobot, 0, 0); + + *cube = _mm256_andnot_si256(_eo_avx2, *cube); + *cube = _mm256_or_si256(*cube, veo); +} + +_static_inline cube_t +invcoord_esep(int64_t esep) +{ + cube_t eee, ret; + int64_t bit1, bit2, i, j, jj, k, l, s, v, w, is1, set1, set2; + uint8_t mem[32]; + uint8_t slice[3] = {0}; + + set1 = esep % 70; + set2 = esep / 70; + + for (i = 0, j = 0, k = 4, l = 4; i < 12; i++) { + v = binomial[11-i][k]; + jj = j < 8; + w = jj * binomial[7-(j*jj)][l]; + bit2 = set2 >= v; + bit1 = set1 >= w; + is1 = (1 - bit2) * bit1; + + set2 -= bit2 * v; + k -= bit2; + set1 -= is1 * w; + l -= is1; + j += (1-bit2); + s = 2*bit2 + (1-bit2)*bit1; + + mem[i+16] = (slice[s]++) | (uint8_t)(s << 2); + } + + ret = solved; + eee = _mm256_loadu_si256((__m256i_u *)&mem); + copy_edges(&ret, eee); + + return ret; +} -- cgit v1.3