ref: 17eed992af381d05e0a3af811aa4320d5b2cbbda
dir: /codec/processing/src/arm64/adaptive_quantization_aarch64_neon.S/
/*! * \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