790 lines
30 KiB
C++
790 lines
30 KiB
C++
/*
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* Copyright 2014 The LibYuv Project Authors. All rights reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "libyuv/row.h"
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#ifdef __cplusplus
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namespace libyuv {
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extern "C" {
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#endif
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// This module is for GCC Neon.
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#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
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#ifdef HAS_SCALEROWDOWN2_NEON
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// Read 32x1 throw away even pixels, and write 16x1.
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void ScaleRowDown2_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
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uint8* dst, int dst_width) {
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asm volatile (
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"1: \n"
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// load even pixels into v0, odd into v1
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MEMACCESS(0)
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"ld2 {v0.16b, v1.16b}, [%0], #32 \n"
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"subs %2, %2, #16 \n" // 16 processed per loop
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MEMACCESS(1)
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"st1 {v1.16b}, [%1], #16 \n" // store odd pixels
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst), // %1
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"+r"(dst_width) // %2
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:
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: "v0", "v1" // Clobber List
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);
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}
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#endif //HAS_SCALEROWDOWN2_NEON
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#ifdef HAS_SCALEROWDOWN2_NEON
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// Read 32x2 average down and write 16x1.
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void ScaleRowDown2Box_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
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uint8* dst, int dst_width) {
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asm volatile (
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// change the stride to row 2 pointer
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"add %1, %1, %0 \n"
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"1: \n"
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MEMACCESS(0)
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"ld1 {v0.16b, v1.16b}, [%0], #32 \n" // load row 1 and post inc
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MEMACCESS(1)
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"ld1 {v2.16b, v3.16b}, [%1], #32 \n" // load row 2 and post inc
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"subs %3, %3, #16 \n" // 16 processed per loop
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"uaddlp v0.8h, v0.16b \n" // row 1 add adjacent
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"uaddlp v1.8h, v1.16b \n"
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"uadalp v0.8h, v2.16b \n" // row 2 add adjacent + row1
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"uadalp v1.8h, v3.16b \n"
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"rshrn v0.8b, v0.8h, #2 \n" // downshift, round and pack
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"rshrn2 v0.16b, v1.8h, #2 \n"
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MEMACCESS(2)
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"st1 {v0.16b}, [%2], #16 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(src_stride), // %1
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"+r"(dst), // %2
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"+r"(dst_width) // %3
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:
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: "v0", "v1", "v2", "v3" // Clobber List
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);
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}
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#endif //HAS_SCALEROWDOWN2_NEON
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#ifdef HAS_SCALEROWDOWN4_NEON
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void ScaleRowDown4_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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asm volatile (
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"1: \n"
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MEMACCESS(0)
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"ld4 {v0.8b-3.8b}, [%0], #32 \n" // src line 0
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"subs %2, %2, #8 \n" // 8 processed per loop
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MEMACCESS(1)
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"st1 {v2.8b}, [%1], #8 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst_ptr), // %1
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"+r"(dst_width) // %2
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:
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: "v0", "v1", "v2", "v3", "memory", "cc"
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);
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}
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#endif //HAS_SCALEROWDOWN4_NEON
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#ifdef HAS_SCALEROWDOWN4_NEON
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void ScaleRowDown4Box_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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const uint8* src_ptr1 = src_ptr + src_stride;
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const uint8* src_ptr2 = src_ptr + src_stride * 2;
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const uint8* src_ptr3 = src_ptr + src_stride * 3;
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asm volatile (
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"1: \n"
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MEMACCESS(0)
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"ld1 {v0.16b}, [%0], #16 \n" // load up 16x4
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MEMACCESS(3)
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"ld1 {v1.16b}, [%3], #16 \n"
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MEMACCESS(4)
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"ld1 {v2.16b}, [%4], #16 \n"
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MEMACCESS(5)
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"ld1 {v3.16b}, [%5], #16 \n"
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"subs %2, %2, #4 \n"
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"uaddlp v0.8h, v0.16b \n"
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"uadalp v0.8h, v1.16b \n"
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"uadalp v0.8h, v2.16b \n"
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"uadalp v0.8h, v3.16b \n"
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"addp v0.8h, v0.8h, v0.8h \n"
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"rshrn v0.8b, v0.8h, #4 \n" // divide by 16 w/rounding
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MEMACCESS(1)
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"st1 {v0.s}[0], [%1], #4 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst_ptr), // %1
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"+r"(dst_width), // %2
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"+r"(src_ptr1), // %3
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"+r"(src_ptr2), // %4
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"+r"(src_ptr3) // %5
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:
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: "v0", "v1", "v2", "v3", "memory", "cc"
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);
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}
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#endif //HAS_SCALEROWDOWN4_NEON
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#ifdef HAS_SCALEROWDOWN34_NEON
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// Down scale from 4 to 3 pixels. Use the neon multilane read/write
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// to load up the every 4th pixel into a 4 different registers.
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// Point samples 32 pixels to 24 pixels.
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void ScaleRowDown34_NEON(const uint8* src_ptr,
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ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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asm volatile (
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"1: \n"
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MEMACCESS(0)
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"ld4 {v0.8b-v3.8b}, [%0], #32 \n" // src line 0
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"subs %2, %2, #24 \n"
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"mov v2.8b, v3.8b \n" // order v0, v1, v2
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MEMACCESS(1)
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"st3 {v0.8b-v2.8b}, [%1], #24 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst_ptr), // %1
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"+r"(dst_width) // %2
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:
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: "v0", "v1", "v2", "v3", "memory", "cc"
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);
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}
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#endif //HAS_SCALEROWDOWN34_NEON
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#ifdef HAS_SCALEROWDOWN34_NEON
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void ScaleRowDown34_0_Box_NEON(const uint8* src_ptr,
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ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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asm volatile (
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"movi v20.8b, #3 \n"
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"add %3, %3, %0 \n"
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"1: \n"
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MEMACCESS(0)
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"ld4 {v0.8b-v3.8b}, [%0], #32 \n" // src line 0
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MEMACCESS(3)
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"ld4 {v4.8b-v7.8b}, [%3], #32 \n" // src line 1
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"subs %2, %2, #24 \n"
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// filter src line 0 with src line 1
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// expand chars to shorts to allow for room
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// when adding lines together
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"ushll v16.8h, v4.8b, #0 \n"
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"ushll v17.8h, v5.8b, #0 \n"
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"ushll v18.8h, v6.8b, #0 \n"
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"ushll v19.8h, v7.8b, #0 \n"
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// 3 * line_0 + line_1
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"umlal v16.8h, v0.8b, v20.8b \n"
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"umlal v17.8h, v1.8b, v20.8b \n"
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"umlal v18.8h, v2.8b, v20.8b \n"
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"umlal v19.8h, v3.8b, v20.8b \n"
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// (3 * line_0 + line_1) >> 2
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"uqrshrn v0.8b, v16.8h, #2 \n"
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"uqrshrn v1.8b, v17.8h, #2 \n"
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"uqrshrn v2.8b, v18.8h, #2 \n"
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"uqrshrn v3.8b, v19.8h, #2 \n"
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// a0 = (src[0] * 3 + s[1] * 1) >> 2
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"ushll v16.8h, v1.8b, #0 \n"
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"umlal v16.8h, v0.8b, v20.8b \n"
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"uqrshrn v0.8b, v16.8h, #2 \n"
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// a1 = (src[1] * 1 + s[2] * 1) >> 1
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"urhadd v1.8b, v1.8b, v2.8b \n"
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// a2 = (src[2] * 1 + s[3] * 3) >> 2
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"ushll v16.8h, v2.8b, #0 \n"
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"umlal v16.8h, v3.8b, v20.8b \n"
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"uqrshrn v2.8b, v16.8h, #2 \n"
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MEMACCESS(1)
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"st3 {v0.8b-v2.8b}, [%1], #24 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst_ptr), // %1
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"+r"(dst_width), // %2
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"+r"(src_stride) // %3
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:
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: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16", "v17", "v18", "v19",
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"v20", "memory", "cc"
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);
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}
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#endif //ScaleRowDown34_0_Box_NEON
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#ifdef HAS_SCALEROWDOWN34_NEON
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void ScaleRowDown34_1_Box_NEON(const uint8* src_ptr,
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ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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asm volatile (
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"movi v20.8b, #3 \n"
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"add %3, %3, %0 \n"
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"1: \n"
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MEMACCESS(0)
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"ld4 {v0.8b-v3.8b}, [%0], #32 \n" // src line 0
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MEMACCESS(3)
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"ld4 {v4.8b-v7.8b}, [%3], #32 \n" // src line 1
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"subs %2, %2, #24 \n"
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// average src line 0 with src line 1
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"urhadd v0.8b, v0.8b, v4.8b \n"
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"urhadd v1.8b, v1.8b, v5.8b \n"
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"urhadd v2.8b, v2.8b, v6.8b \n"
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"urhadd v3.8b, v3.8b, v7.8b \n"
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// a0 = (src[0] * 3 + s[1] * 1) >> 2
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"ushll v4.8h, v1.8b, #0 \n"
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"umlal v4.8h, v0.8b, v20.8b \n"
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"uqrshrn v0.8b, v4.8h, #2 \n"
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// a1 = (src[1] * 1 + s[2] * 1) >> 1
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"urhadd v1.8b, v1.8b, v2.8b \n"
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// a2 = (src[2] * 1 + s[3] * 3) >> 2
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"ushll v4.8h, v2.8b, #0 \n"
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"umlal v4.8h, v3.8b, v20.8b \n"
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"uqrshrn v2.8b, v4.8h, #2 \n"
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MEMACCESS(1)
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"st3 {v0.8b-v2.8b}, [%1], #24 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst_ptr), // %1
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"+r"(dst_width), // %2
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"+r"(src_stride) // %3
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:
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: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20", "memory", "cc"
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);
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}
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#endif //HAS_SCALEROWDOWN34_NEON
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#ifdef HAS_SCALEROWDOWN38_NEON
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static uvec8 kShuf38 =
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{ 0, 3, 6, 8, 11, 14, 16, 19, 22, 24, 27, 30, 0, 0, 0, 0 };
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static uvec8 kShuf38_2 =
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{ 0, 16, 32, 2, 18, 33, 4, 20, 34, 6, 22, 35, 0, 0, 0, 0 };
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static vec16 kMult38_Div6 =
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{ 65536 / 12, 65536 / 12, 65536 / 12, 65536 / 12,
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65536 / 12, 65536 / 12, 65536 / 12, 65536 / 12 };
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static vec16 kMult38_Div9 =
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{ 65536 / 18, 65536 / 18, 65536 / 18, 65536 / 18,
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65536 / 18, 65536 / 18, 65536 / 18, 65536 / 18 };
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// 32 -> 12
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void ScaleRowDown38_NEON(const uint8* src_ptr,
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ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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asm volatile (
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MEMACCESS(3)
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"ld1 {v3.16b}, [%3] \n"
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"1: \n"
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MEMACCESS(0)
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"ld1 {v0.16b, v1.16b}, [%0], #32 \n"
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"subs %2, %2, #12 \n"
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"tbl v2.16b, {v0.16b, v1.16b}, v3.16b \n"
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MEMACCESS(1)
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"st1 {v2.8b}, [%1], #8 \n"
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MEMACCESS(1)
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"st1 {v2.s}[2], [%1], #4 \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst_ptr), // %1
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"+r"(dst_width) // %2
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: "r"(&kShuf38) // %3
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: "v0", "v1", "v2", "v3", "memory", "cc"
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);
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}
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#endif //HAS_SCALEROWDOWN38_NEON
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#ifdef HAS_SCALEROWDOWN38_NEON
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// 32x3 -> 12x1
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void OMITFP ScaleRowDown38_3_Box_NEON(const uint8* src_ptr,
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ptrdiff_t src_stride,
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uint8* dst_ptr, int dst_width) {
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const uint8* src_ptr1 = src_ptr + src_stride * 2;
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asm volatile (
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MEMACCESS(5)
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"ld1 {v29.8h}, [%5] \n"
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MEMACCESS(6)
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"ld1 {v30.16b}, [%6] \n"
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MEMACCESS(7)
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"ld1 {v31.8h}, [%7] \n"
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"add %3, %3, %0 \n"
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"1: \n"
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// 00 40 01 41 02 42 03 43
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// 10 50 11 51 12 52 13 53
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// 20 60 21 61 22 62 23 63
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// 30 70 31 71 32 72 33 73
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MEMACCESS(0)
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"ld4 {v0.8b-v3.8b}, [%0], #32 \n"
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MEMACCESS(3)
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"ld4 {v4.8b-v7.8b}, [%3], #32 \n"
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MEMACCESS(4)
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"ld4 {v16.8b-v19.8b}, [%4], #32 \n"
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"subs %2, %2, #12 \n"
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// Shuffle the input data around to get align the data
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// so adjacent data can be added. 0,1 - 2,3 - 4,5 - 6,7
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// 00 10 01 11 02 12 03 13
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// 40 50 41 51 42 52 43 53
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"trn1 v20.8b, v0.8b, v1.8b \n"
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"trn2 v21.8b, v0.8b, v1.8b \n"
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"trn1 v22.8b, v4.8b, v5.8b \n"
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"trn2 v23.8b, v4.8b, v5.8b \n"
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"trn1 v24.8b, v16.8b, v17.8b \n"
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"trn2 v25.8b, v16.8b, v17.8b \n"
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// 20 30 21 31 22 32 23 33
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// 60 70 61 71 62 72 63 73
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"trn1 v0.8b, v2.8b, v3.8b \n"
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"trn2 v1.8b, v2.8b, v3.8b \n"
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"trn1 v4.8b, v6.8b, v7.8b \n"
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"trn2 v5.8b, v6.8b, v7.8b \n"
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"trn1 v16.8b, v18.8b, v19.8b \n"
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"trn2 v17.8b, v18.8b, v19.8b \n"
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// 00+10 01+11 02+12 03+13
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// 40+50 41+51 42+52 43+53
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"uaddlp v20.4h, v20.8b \n"
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"uaddlp v21.4h, v21.8b \n"
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"uaddlp v22.4h, v22.8b \n"
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"uaddlp v23.4h, v23.8b \n"
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"uaddlp v24.4h, v24.8b \n"
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"uaddlp v25.4h, v25.8b \n"
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// 60+70 61+71 62+72 63+73
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"uaddlp v1.4h, v1.8b \n"
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"uaddlp v5.4h, v5.8b \n"
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"uaddlp v17.4h, v17.8b \n"
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// combine source lines
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"add v20.4h, v20.4h, v22.4h \n"
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"add v21.4h, v21.4h, v23.4h \n"
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"add v20.4h, v20.4h, v24.4h \n"
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"add v21.4h, v21.4h, v25.4h \n"
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"add v2.4h, v1.4h, v5.4h \n"
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"add v2.4h, v2.4h, v17.4h \n"
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// dst_ptr[3] = (s[6 + st * 0] + s[7 + st * 0]
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// + s[6 + st * 1] + s[7 + st * 1]
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// + s[6 + st * 2] + s[7 + st * 2]) / 6
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"sqrdmulh v2.8h, v2.8h, v29.8h \n"
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"xtn v2.8b, v2.8h \n"
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// Shuffle 2,3 reg around so that 2 can be added to the
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// 0,1 reg and 3 can be added to the 4,5 reg. This
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// requires expanding from u8 to u16 as the 0,1 and 4,5
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// registers are already expanded. Then do transposes
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// to get aligned.
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// xx 20 xx 30 xx 21 xx 31 xx 22 xx 32 xx 23 xx 33
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"ushll v16.8h, v16.8b, #0 \n"
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"uaddl v0.8h, v0.8b, v4.8b \n"
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// combine source lines
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"add v0.8h, v0.8h, v16.8h \n"
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// xx 20 xx 21 xx 22 xx 23
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// xx 30 xx 31 xx 32 xx 33
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|
"trn1 v1.8h, v0.8h, v0.8h \n"
|
|
"trn2 v4.8h, v0.8h, v0.8h \n"
|
|
"xtn v0.4h, v1.4s \n"
|
|
"xtn v4.4h, v4.4s \n"
|
|
|
|
// 0+1+2, 3+4+5
|
|
"add v20.8h, v20.8h, v0.8h \n"
|
|
"add v21.8h, v21.8h, v4.8h \n"
|
|
|
|
// Need to divide, but can't downshift as the the value
|
|
// isn't a power of 2. So multiply by 65536 / n
|
|
// and take the upper 16 bits.
|
|
"sqrdmulh v0.8h, v20.8h, v31.8h \n"
|
|
"sqrdmulh v1.8h, v21.8h, v31.8h \n"
|
|
|
|
// Align for table lookup, vtbl requires registers to
|
|
// be adjacent
|
|
"tbl v3.16b, {v0.16b, v1.16b, v2.16b}, v30.16b \n"
|
|
|
|
MEMACCESS(1)
|
|
"st1 {v3.8b}, [%1], #8 \n"
|
|
MEMACCESS(1)
|
|
"st1 {v3.s}[2], [%1], #4 \n"
|
|
"bgt 1b \n"
|
|
: "+r"(src_ptr), // %0
|
|
"+r"(dst_ptr), // %1
|
|
"+r"(dst_width), // %2
|
|
"+r"(src_stride), // %3
|
|
"+r"(src_ptr1) // %4
|
|
: "r"(&kMult38_Div6), // %5
|
|
"r"(&kShuf38_2), // %6
|
|
"r"(&kMult38_Div9) // %7
|
|
: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16", "v17",
|
|
"v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v29",
|
|
"v30", "v31", "memory", "cc"
|
|
);
|
|
}
|
|
#endif //HAS_SCALEROWDOWN38_NEON
|
|
|
|
#ifdef HAS_SCALEROWDOWN38_NEON
|
|
// 32x2 -> 12x1
|
|
void ScaleRowDown38_2_Box_NEON(const uint8* src_ptr,
|
|
ptrdiff_t src_stride,
|
|
uint8* dst_ptr, int dst_width) {
|
|
asm volatile (
|
|
MEMACCESS(4)
|
|
"ld1 {v30.8h}, [%4] \n"
|
|
MEMACCESS(5)
|
|
"ld1 {v31.16b}, [%5] \n"
|
|
"add %3, %3, %0 \n"
|
|
"1: \n"
|
|
|
|
// 00 40 01 41 02 42 03 43
|
|
// 10 50 11 51 12 52 13 53
|
|
// 20 60 21 61 22 62 23 63
|
|
// 30 70 31 71 32 72 33 73
|
|
MEMACCESS(0)
|
|
"ld4 {v0.8b-v3.8b}, [%0], #32 \n"
|
|
MEMACCESS(3)
|
|
"ld4 {v4.8b-v7.8b}, [%3], #32 \n"
|
|
"subs %2, %2, #12 \n"
|
|
|
|
// Shuffle the input data around to get align the data
|
|
// so adjacent data can be added. 0,1 - 2,3 - 4,5 - 6,7
|
|
// 00 10 01 11 02 12 03 13
|
|
// 40 50 41 51 42 52 43 53
|
|
"trn1 v16.8b, v0.8b, v1.8b \n"
|
|
"trn2 v17.8b, v0.8b, v1.8b \n"
|
|
"trn1 v18.8b, v4.8b, v5.8b \n"
|
|
"trn2 v19.8b, v4.8b, v5.8b \n"
|
|
|
|
// 20 30 21 31 22 32 23 33
|
|
// 60 70 61 71 62 72 63 73
|
|
"trn1 v0.8b, v2.8b, v3.8b \n"
|
|
"trn2 v1.8b, v2.8b, v3.8b \n"
|
|
"trn1 v4.8b, v6.8b, v7.8b \n"
|
|
"trn2 v5.8b, v6.8b, v7.8b \n"
|
|
|
|
// 00+10 01+11 02+12 03+13
|
|
// 40+50 41+51 42+52 43+53
|
|
"uaddlp v16.4h, v16.8b \n"
|
|
"uaddlp v17.4h, v17.8b \n"
|
|
"uaddlp v18.4h, v18.8b \n"
|
|
"uaddlp v19.4h, v19.8b \n"
|
|
|
|
// 60+70 61+71 62+72 63+73
|
|
"uaddlp v1.4h, v1.8b \n"
|
|
"uaddlp v5.4h, v5.8b \n"
|
|
|
|
// combine source lines
|
|
"add v16.4h, v16.4h, v18.4h \n"
|
|
"add v17.4h, v17.4h, v19.4h \n"
|
|
"add v2.4h, v1.4h, v5.4h \n"
|
|
|
|
// dst_ptr[3] = (s[6] + s[7] + s[6+st] + s[7+st]) / 4
|
|
"uqrshrn v2.8b, v2.8h, #2 \n"
|
|
|
|
// Shuffle 2,3 reg around so that 2 can be added to the
|
|
// 0,1 reg and 3 can be added to the 4,5 reg. This
|
|
// requires expanding from u8 to u16 as the 0,1 and 4,5
|
|
// registers are already expanded. Then do transposes
|
|
// to get aligned.
|
|
// xx 20 xx 30 xx 21 xx 31 xx 22 xx 32 xx 23 xx 33
|
|
|
|
// combine source lines
|
|
"uaddl v0.8h, v0.8b, v4.8b \n"
|
|
|
|
// xx 20 xx 21 xx 22 xx 23
|
|
// xx 30 xx 31 xx 32 xx 33
|
|
"trn1 v1.8h, v0.8h, v0.8h \n"
|
|
"trn2 v4.8h, v0.8h, v0.8h \n"
|
|
"xtn v0.4h, v1.4s \n"
|
|
"xtn v4.4h, v4.4s \n"
|
|
|
|
// 0+1+2, 3+4+5
|
|
"add v16.8h, v16.8h, v0.8h \n"
|
|
"add v17.8h, v17.8h, v4.8h \n"
|
|
|
|
// Need to divide, but can't downshift as the the value
|
|
// isn't a power of 2. So multiply by 65536 / n
|
|
// and take the upper 16 bits.
|
|
"sqrdmulh v0.8h, v16.8h, v30.8h \n"
|
|
"sqrdmulh v1.8h, v17.8h, v30.8h \n"
|
|
|
|
// Align for table lookup, vtbl requires registers to
|
|
// be adjacent
|
|
|
|
"tbl v3.16b, {v0.16b, v1.16b, v2.16b}, v31.16b \n"
|
|
|
|
MEMACCESS(1)
|
|
"st1 {v3.8b}, [%1], #8 \n"
|
|
MEMACCESS(1)
|
|
"st1 {v3.s}[2], [%1], #4 \n"
|
|
"bgt 1b \n"
|
|
: "+r"(src_ptr), // %0
|
|
"+r"(dst_ptr), // %1
|
|
"+r"(dst_width), // %2
|
|
"+r"(src_stride) // %3
|
|
: "r"(&kMult38_Div6), // %4
|
|
"r"(&kShuf38_2) // %5
|
|
: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16", "v17",
|
|
"v18", "v19", "v30", "v31", "memory", "cc"
|
|
);
|
|
}
|
|
#endif //HAS_SCALEROWDOWN38_NEON
|
|
|
|
// 16x2 -> 16x1
|
|
void ScaleFilterRows_NEON(uint8* dst_ptr,
|
|
const uint8* src_ptr, ptrdiff_t src_stride,
|
|
int dst_width, int source_y_fraction) {
|
|
int y_fraction = 256 - source_y_fraction;
|
|
asm volatile (
|
|
"cmp %4, #0 \n"
|
|
"beq 100f \n"
|
|
"add %2, %2, %1 \n"
|
|
"cmp %4, #64 \n"
|
|
"beq 75f \n"
|
|
"cmp %4, #128 \n"
|
|
"beq 50f \n"
|
|
"cmp %4, #192 \n"
|
|
"beq 25f \n"
|
|
|
|
"dup v5.8b, %w4 \n"
|
|
"dup v4.8b, %w5 \n"
|
|
// General purpose row blend.
|
|
"1: \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v0.16b}, [%1], #16 \n"
|
|
MEMACCESS(2)
|
|
"ld1 {v1.16b}, [%2], #16 \n"
|
|
"subs %3, %3, #16 \n"
|
|
"umull v6.8h, v0.8b, v4.8b \n"
|
|
"umull2 v7.8h, v0.16b, v4.16b \n"
|
|
"umlal v6.8h, v1.8b, v5.8b \n"
|
|
"umlal2 v7.8h, v1.16b, v5.16b \n"
|
|
"rshrn v0.8b, v6.8h, #8 \n"
|
|
"rshrn2 v0.16b, v7.8h, #8 \n"
|
|
MEMACCESS(0)
|
|
"st1 {v0.16b}, [%0], #16 \n"
|
|
"bgt 1b \n"
|
|
"b 99f \n"
|
|
|
|
// Blend 25 / 75.
|
|
"25: \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v0.16b}, [%1], #16 \n"
|
|
MEMACCESS(2)
|
|
"ld1 {v1.16b}, [%2], #16 \n"
|
|
"subs %3, %3, #16 \n"
|
|
"urhadd v0.16b, v0.16b, v1.16b \n"
|
|
"urhadd v0.16b, v0.16b, v1.16b \n"
|
|
MEMACCESS(0)
|
|
"st1 {v0.16b}, [%0], #16 \n"
|
|
"bgt 25b \n"
|
|
"b 99f \n"
|
|
|
|
// Blend 50 / 50.
|
|
"50: \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v0.16b}, [%1], #16 \n"
|
|
MEMACCESS(2)
|
|
"ld1 {v1.16b}, [%2], #16 \n"
|
|
"subs %3, %3, #16 \n"
|
|
"urhadd v0.16b, v0.16b, v1.16b \n"
|
|
MEMACCESS(0)
|
|
"st1 {v0.16b}, [%0], #16 \n"
|
|
"bgt 50b \n"
|
|
"b 99f \n"
|
|
|
|
// Blend 75 / 25.
|
|
"75: \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v1.16b}, [%1], #16 \n"
|
|
MEMACCESS(2)
|
|
"ld1 {v0.16b}, [%2], #16 \n"
|
|
"subs %3, %3, #16 \n"
|
|
"urhadd v0.16b, v0.16b, v1.16b \n"
|
|
"urhadd v0.16b, v0.16b, v1.16b \n"
|
|
MEMACCESS(0)
|
|
"st1 {v0.16b}, [%0], #16 \n"
|
|
"bgt 75b \n"
|
|
"b 99f \n"
|
|
|
|
// Blend 100 / 0 - Copy row unchanged.
|
|
"100: \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v0.16b}, [%1], #16 \n"
|
|
"subs %3, %3, #16 \n"
|
|
MEMACCESS(0)
|
|
"st1 {v0.16b}, [%0], #16 \n"
|
|
"bgt 100b \n"
|
|
|
|
"99: \n"
|
|
MEMACCESS(0)
|
|
"st1 {v0.b}[15], [%0] \n"
|
|
: "+r"(dst_ptr), // %0
|
|
"+r"(src_ptr), // %1
|
|
"+r"(src_stride), // %2
|
|
"+r"(dst_width), // %3
|
|
"+r"(source_y_fraction),// %4
|
|
"+r"(y_fraction) // %5
|
|
:
|
|
: "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "memory", "cc"
|
|
);
|
|
}
|
|
|
|
#ifdef HAS_SCALEARGBROWDOWN2_NEON
|
|
void ScaleARGBRowDown2_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
|
|
uint8* dst, int dst_width) {
|
|
asm volatile (
|
|
"1: \n"
|
|
// load even pixels into q0, odd into q1
|
|
MEMACCESS (0)
|
|
"ld2 {v0.4s, v1.4s}, [%0], #32 \n"
|
|
MEMACCESS (0)
|
|
"ld2 {v2.4s, v3.4s}, [%0], #32 \n"
|
|
"subs %2, %2, #8 \n" // 8 processed per loop
|
|
MEMACCESS (1)
|
|
"st1 {v1.16b}, [%1], #16 \n" // store odd pixels
|
|
MEMACCESS (1)
|
|
"st1 {v3.16b}, [%1], #16 \n"
|
|
"bgt 1b \n"
|
|
: "+r" (src_ptr), // %0
|
|
"+r" (dst), // %1
|
|
"+r" (dst_width) // %2
|
|
:
|
|
: "memory", "cc", "v0", "v1", "v2", "v3" // Clobber List
|
|
);
|
|
}
|
|
#endif //HAS_SCALEARGBROWDOWN2_NEON
|
|
|
|
#ifdef HAS_SCALEARGBROWDOWN2_NEON
|
|
void ScaleARGBRowDown2Box_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
|
|
uint8* dst, int dst_width) {
|
|
asm volatile (
|
|
// change the stride to row 2 pointer
|
|
"add %1, %1, %0 \n"
|
|
"1: \n"
|
|
MEMACCESS (0)
|
|
"ld4 {v0.16b - v3.16b}, [%0], #64 \n" // load 8 ARGB pixels.
|
|
"subs %3, %3, #8 \n" // 8 processed per loop.
|
|
"uaddlp v0.8h, v0.16b \n" // B 16 bytes -> 8 shorts.
|
|
"uaddlp v1.8h, v1.16b \n" // G 16 bytes -> 8 shorts.
|
|
"uaddlp v2.8h, v2.16b \n" // R 16 bytes -> 8 shorts.
|
|
"uaddlp v3.8h, v3.16b \n" // A 16 bytes -> 8 shorts.
|
|
MEMACCESS (1)
|
|
"ld4 {v16.16b - v19.16b}, [%1], #64 \n" // load 8 more ARGB pixels.
|
|
"uadalp v0.8h, v16.16b \n" // B 16 bytes -> 8 shorts.
|
|
"uadalp v1.8h, v17.16b \n" // G 16 bytes -> 8 shorts.
|
|
"uadalp v2.8h, v18.16b \n" // R 16 bytes -> 8 shorts.
|
|
"uadalp v3.8h, v19.16b \n" // A 16 bytes -> 8 shorts.
|
|
"rshrn v0.8b, v0.8h, #2 \n" // downshift, round and pack
|
|
"rshrn v1.8b, v1.8h, #2 \n"
|
|
"rshrn v2.8b, v2.8h, #2 \n"
|
|
"rshrn v3.8b, v3.8h, #2 \n"
|
|
MEMACCESS (2)
|
|
"st4 {v0.8b - v3.8b}, [%2], #32 \n"
|
|
"bgt 1b \n"
|
|
: "+r" (src_ptr), // %0
|
|
"+r" (src_stride), // %1
|
|
"+r" (dst), // %2
|
|
"+r" (dst_width) // %3
|
|
:
|
|
: "memory", "cc", "v0", "v1", "v2", "v3", "v16", "v17", "v18", "v19"
|
|
);
|
|
}
|
|
#endif //HAS_SCALEARGBROWDOWN2_NEON
|
|
|
|
#ifdef HAS_SCALEARGBROWDOWNEVEN_NEON
|
|
// Reads 4 pixels at a time.
|
|
// Alignment requirement: src_argb 4 byte aligned.
|
|
void ScaleARGBRowDownEven_NEON(const uint8* src_argb, ptrdiff_t src_stride,
|
|
int src_stepx, uint8* dst_argb, int dst_width) {
|
|
asm volatile (
|
|
"1: \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.s}[0], [%0], %3 \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.s}[1], [%0], %3 \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.s}[2], [%0], %3 \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.s}[3], [%0], %3 \n"
|
|
"subs %2, %2, #4 \n" // 4 pixels per loop.
|
|
MEMACCESS(1)
|
|
"st1 {v0.16b}, [%1], #16 \n"
|
|
"bgt 1b \n"
|
|
: "+r"(src_argb), // %0
|
|
"+r"(dst_argb), // %1
|
|
"+r"(dst_width) // %2
|
|
: "r"(src_stepx * 4) // %3
|
|
: "memory", "cc", "v0"
|
|
);
|
|
}
|
|
#endif //HAS_SCALEARGBROWDOWNEVEN_NEON
|
|
|
|
#ifdef HAS_SCALEARGBROWDOWNEVEN_NEON
|
|
// Reads 4 pixels at a time.
|
|
// Alignment requirement: src_argb 4 byte aligned.
|
|
// TODO, might be worth another optimization pass in future.
|
|
// It could be upgraded to 8 pixels at a time to start with.
|
|
void ScaleARGBRowDownEvenBox_NEON(const uint8* src_argb, ptrdiff_t src_stride,
|
|
int src_stepx,
|
|
uint8* dst_argb, int dst_width) {
|
|
asm volatile (
|
|
"add %1, %1, %0 \n"
|
|
"1: \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v0.8b}, [%0], %4 \n" // Read 4 2x2 blocks -> 2x1
|
|
MEMACCESS(1)
|
|
"ld1 {v1.8b}, [%1], %4 \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v2.8b}, [%0], %4 \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v3.8b}, [%1], %4 \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v4.8b}, [%0], %4 \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v5.8b}, [%1], %4 \n"
|
|
MEMACCESS(0)
|
|
"ld1 {v6.8b}, [%0], %4 \n"
|
|
MEMACCESS(1)
|
|
"ld1 {v7.8b}, [%1], %4 \n"
|
|
"uaddl v0.8h, v0.8b, v1.8b \n"
|
|
"uaddl v2.8h, v2.8b, v3.8b \n"
|
|
"uaddl v4.8h, v4.8b, v5.8b \n"
|
|
"uaddl v6.8h, v6.8b, v7.8b \n"
|
|
"mov v16.d[1], v0.d[1] \n" // ab_cd -> ac_bd
|
|
"mov v0.d[1], v2.d[0] \n"
|
|
"mov v2.d[0], v16.d[1] \n"
|
|
"mov v16.d[1], v4.d[1] \n" // ef_gh -> eg_fh
|
|
"mov v4.d[1], v6.d[0] \n"
|
|
"mov v6.d[0], v16.d[1] \n"
|
|
"add v0.8h, v0.8h, v2.8h \n" // (a+b)_(c+d)
|
|
"add v4.8h, v4.8h, v6.8h \n" // (e+f)_(g+h)
|
|
"rshrn v0.8b, v0.8h, #2 \n" // first 2 pixels.
|
|
"rshrn2 v0.16b, v4.8h, #2 \n" // next 2 pixels.
|
|
"subs %3, %3, #4 \n" // 4 pixels per loop.
|
|
MEMACCESS(2)
|
|
"st1 {v0.16b}, [%2], #16 \n"
|
|
"bgt 1b \n"
|
|
: "+r"(src_argb), // %0
|
|
"+r"(src_stride), // %1
|
|
"+r"(dst_argb), // %2
|
|
"+r"(dst_width) // %3
|
|
: "r"(src_stepx * 4) // %4
|
|
: "memory", "cc", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16"
|
|
);
|
|
}
|
|
#endif // HAS_SCALEARGBROWDOWNEVEN_NEON
|
|
#endif // __aarch64__
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#ifdef __cplusplus
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} // extern "C"
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} // namespace libyuv
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#endif
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