/*! * \copy *     Copyright (c)  2013, Cisco Systems *     All rights reserved. * *     Redistribution and use in source and binary forms, with or without *     modification, are permitted provided that the following conditions *     are met: * *        * Redistributions of source code must retain the above copyright *          notice, this list of conditions and the following disclaimer. * *        * Redistributions in binary form must reproduce the above copyright *          notice, this list of conditions and the following disclaimer in *          the documentation and/or other materials provided with the *          distribution. * *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *     "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT *     LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE *     COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, *     INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, *     BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER *     CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT *     LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN *     ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE *     POSSIBILITY OF SUCH DAMAGE. * */ #ifdef HAVE_NEON_AARCH64#include "arm_arch64_common_macro.S"WELS_ASM_AARCH64_FUNC_BEGIN SampleVariance16x16_AArch64_neon    SIGN_EXTENSION x1, w1    SIGN_EXTENSION x3, w3    ld1   {v1.16b}, [x0], x1 //save the ref data (16bytes)    ld1   {v0.16b}, [x2], x3 //save the src data (16bytes)    uabd  v2.16b, v0.16b, v1.16b    umull  v3.8h, v2.8b, v2.8b    umull2 v4.8h, v2.16b, v2.16b    uaddlp v4.4s, v4.8h    uadalp v4.4s, v3.8h //sqr    uaddlp v2.8h, v2.16b //sum     uaddlp v1.8h, v0.16b //sum_cur     umull  v3.8h, v0.8b, v0.8b    umull2 v5.8h, v0.16b, v0.16b    uaddlp v3.4s, v3.8h    uadalp v3.4s, v5.8h //sqr_cur.rept 15    ld1   {v5.16b}, [x0], x1 //save the ref data (16bytes)    ld1   {v0.16b}, [x2], x3 //save the src data (16bytes)     uabd  v6.16b, v0.16b, v5.16b     //v1 save sum_cur    uadalp v1.8h, v0.16b     //v4 save sqr    umull  v5.8h, v6.8b, v6.8b    umull2 v7.8h, v6.16b, v6.16b    uadalp v4.4s, v5.8h //sqr    uadalp v4.4s, v7.8h //sqr     //v2 save sum    uadalp v2.8h, v6.16b     //v3 save sqr_cur    umull  v5.8h, v0.8b, v0.8b    umull2 v7.8h, v0.16b, v0.16b    uadalp v3.4s, v5.8h //sqr_cur    uadalp v3.4s, v7.8h //sqr_cur.endr    uaddlv s2, v2.8h //sum    uaddlv s1, v1.8h //sum_cur    ins    v2.s[1], v1.s[0] // sum, sum_cur    shrn   v2.4h, v2.4s, #8 // sum, sum_cur>>8    mul    v2.4h, v2.4h, v2.4h//// sum*sum, sum_cur*sum_cur    uaddlv d4, v4.4s //sqr    uaddlv d3, v3.4s //sqr_cur    ins    v4.s[1], v3.s[0] // sqr, sqr_cur    shrn   v4.4h, v4.4s, #8 // sqr, sqr_cur>>8    sub    v4.4h, v4.4h, v2.4h    st1  {v4.s}[0], [x4]WELS_ASM_AARCH64_FUNC_END#endif