ref: 67aa6c8c23bc6ca90cfde756015f0aae61fe20f7
dir: /third_party/libyuv/source/rotate_neon64.cc/
/*
* Copyright 2014 The LibYuv Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "libyuv/rotate_row.h"
#include "libyuv/row.h"
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// This module is for GCC Neon armv8 64 bit.
#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
static const uvec8 kVTbl4x4Transpose = {0, 4, 8, 12, 1, 5, 9, 13,
2, 6, 10, 14, 3, 7, 11, 15};
void TransposeWx8_NEON(const uint8_t* src,
int src_stride,
uint8_t* dst,
int dst_stride,
int width) {
const uint8_t* src_temp;
asm volatile(
// loops are on blocks of 8. loop will stop when
// counter gets to or below 0. starting the counter
// at w-8 allow for this
"sub %w3, %w3, #8 \n"
// handle 8x8 blocks. this should be the majority of the plane
"1: \n"
"mov %0, %1 \n"
"ld1 {v0.8b}, [%0], %5 \n"
"ld1 {v1.8b}, [%0], %5 \n"
"ld1 {v2.8b}, [%0], %5 \n"
"ld1 {v3.8b}, [%0], %5 \n"
"ld1 {v4.8b}, [%0], %5 \n"
"ld1 {v5.8b}, [%0], %5 \n"
"ld1 {v6.8b}, [%0], %5 \n"
"ld1 {v7.8b}, [%0] \n"
"trn2 v16.8b, v0.8b, v1.8b \n"
"trn1 v17.8b, v0.8b, v1.8b \n"
"trn2 v18.8b, v2.8b, v3.8b \n"
"trn1 v19.8b, v2.8b, v3.8b \n"
"trn2 v20.8b, v4.8b, v5.8b \n"
"trn1 v21.8b, v4.8b, v5.8b \n"
"trn2 v22.8b, v6.8b, v7.8b \n"
"trn1 v23.8b, v6.8b, v7.8b \n"
"trn2 v3.4h, v17.4h, v19.4h \n"
"trn1 v1.4h, v17.4h, v19.4h \n"
"trn2 v2.4h, v16.4h, v18.4h \n"
"trn1 v0.4h, v16.4h, v18.4h \n"
"trn2 v7.4h, v21.4h, v23.4h \n"
"trn1 v5.4h, v21.4h, v23.4h \n"
"trn2 v6.4h, v20.4h, v22.4h \n"
"trn1 v4.4h, v20.4h, v22.4h \n"
"trn2 v21.2s, v1.2s, v5.2s \n"
"trn1 v17.2s, v1.2s, v5.2s \n"
"trn2 v20.2s, v0.2s, v4.2s \n"
"trn1 v16.2s, v0.2s, v4.2s \n"
"trn2 v23.2s, v3.2s, v7.2s \n"
"trn1 v19.2s, v3.2s, v7.2s \n"
"trn2 v22.2s, v2.2s, v6.2s \n"
"trn1 v18.2s, v2.2s, v6.2s \n"
"mov %0, %2 \n"
"st1 {v17.8b}, [%0], %6 \n"
"st1 {v16.8b}, [%0], %6 \n"
"st1 {v19.8b}, [%0], %6 \n"
"st1 {v18.8b}, [%0], %6 \n"
"st1 {v21.8b}, [%0], %6 \n"
"st1 {v20.8b}, [%0], %6 \n"
"st1 {v23.8b}, [%0], %6 \n"
"st1 {v22.8b}, [%0] \n"
"add %1, %1, #8 \n" // src += 8
"add %2, %2, %6, lsl #3 \n" // dst += 8 * dst_stride
"subs %w3, %w3, #8 \n" // w -= 8
"b.ge 1b \n"
// add 8 back to counter. if the result is 0 there are
// no residuals.
"adds %w3, %w3, #8 \n"
"b.eq 4f \n"
// some residual, so between 1 and 7 lines left to transpose
"cmp %w3, #2 \n"
"b.lt 3f \n"
"cmp %w3, #4 \n"
"b.lt 2f \n"
// 4x8 block
"mov %0, %1 \n"
"ld1 {v0.s}[0], [%0], %5 \n"
"ld1 {v0.s}[1], [%0], %5 \n"
"ld1 {v0.s}[2], [%0], %5 \n"
"ld1 {v0.s}[3], [%0], %5 \n"
"ld1 {v1.s}[0], [%0], %5 \n"
"ld1 {v1.s}[1], [%0], %5 \n"
"ld1 {v1.s}[2], [%0], %5 \n"
"ld1 {v1.s}[3], [%0] \n"
"mov %0, %2 \n"
"ld1 {v2.16b}, [%4] \n"
"tbl v3.16b, {v0.16b}, v2.16b \n"
"tbl v0.16b, {v1.16b}, v2.16b \n"
// TODO(frkoenig): Rework shuffle above to
// write out with 4 instead of 8 writes.
"st1 {v3.s}[0], [%0], %6 \n"
"st1 {v3.s}[1], [%0], %6 \n"
"st1 {v3.s}[2], [%0], %6 \n"
"st1 {v3.s}[3], [%0] \n"
"add %0, %2, #4 \n"
"st1 {v0.s}[0], [%0], %6 \n"
"st1 {v0.s}[1], [%0], %6 \n"
"st1 {v0.s}[2], [%0], %6 \n"
"st1 {v0.s}[3], [%0] \n"
"add %1, %1, #4 \n" // src += 4
"add %2, %2, %6, lsl #2 \n" // dst += 4 * dst_stride
"subs %w3, %w3, #4 \n" // w -= 4
"b.eq 4f \n"
// some residual, check to see if it includes a 2x8 block,
// or less
"cmp %w3, #2 \n"
"b.lt 3f \n"
// 2x8 block
"2: \n"
"mov %0, %1 \n"
"ld1 {v0.h}[0], [%0], %5 \n"
"ld1 {v1.h}[0], [%0], %5 \n"
"ld1 {v0.h}[1], [%0], %5 \n"
"ld1 {v1.h}[1], [%0], %5 \n"
"ld1 {v0.h}[2], [%0], %5 \n"
"ld1 {v1.h}[2], [%0], %5 \n"
"ld1 {v0.h}[3], [%0], %5 \n"
"ld1 {v1.h}[3], [%0] \n"
"trn2 v2.8b, v0.8b, v1.8b \n"
"trn1 v3.8b, v0.8b, v1.8b \n"
"mov %0, %2 \n"
"st1 {v3.8b}, [%0], %6 \n"
"st1 {v2.8b}, [%0] \n"
"add %1, %1, #2 \n" // src += 2
"add %2, %2, %6, lsl #1 \n" // dst += 2 * dst_stride
"subs %w3, %w3, #2 \n" // w -= 2
"b.eq 4f \n"
// 1x8 block
"3: \n"
"ld1 {v0.b}[0], [%1], %5 \n"
"ld1 {v0.b}[1], [%1], %5 \n"
"ld1 {v0.b}[2], [%1], %5 \n"
"ld1 {v0.b}[3], [%1], %5 \n"
"ld1 {v0.b}[4], [%1], %5 \n"
"ld1 {v0.b}[5], [%1], %5 \n"
"ld1 {v0.b}[6], [%1], %5 \n"
"ld1 {v0.b}[7], [%1] \n"
"st1 {v0.8b}, [%2] \n"
"4: \n"
: "=&r"(src_temp), // %0
"+r"(src), // %1
"+r"(dst), // %2
"+r"(width) // %3
: "r"(&kVTbl4x4Transpose), // %4
"r"(static_cast<ptrdiff_t>(src_stride)), // %5
"r"(static_cast<ptrdiff_t>(dst_stride)) // %6
: "memory", "cc", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16",
"v17", "v18", "v19", "v20", "v21", "v22", "v23");
}
static const uint8_t kVTbl4x4TransposeDi[32] = {
0, 16, 32, 48, 2, 18, 34, 50, 4, 20, 36, 52, 6, 22, 38, 54,
1, 17, 33, 49, 3, 19, 35, 51, 5, 21, 37, 53, 7, 23, 39, 55};
void TransposeUVWx8_NEON(const uint8_t* src,
int src_stride,
uint8_t* dst_a,
int dst_stride_a,
uint8_t* dst_b,
int dst_stride_b,
int width) {
const uint8_t* src_temp;
asm volatile(
// loops are on blocks of 8. loop will stop when
// counter gets to or below 0. starting the counter
// at w-8 allow for this
"sub %w4, %w4, #8 \n"
// handle 8x8 blocks. this should be the majority of the plane
"1: \n"
"mov %0, %1 \n"
"ld1 {v0.16b}, [%0], %5 \n"
"ld1 {v1.16b}, [%0], %5 \n"
"ld1 {v2.16b}, [%0], %5 \n"
"ld1 {v3.16b}, [%0], %5 \n"
"ld1 {v4.16b}, [%0], %5 \n"
"ld1 {v5.16b}, [%0], %5 \n"
"ld1 {v6.16b}, [%0], %5 \n"
"ld1 {v7.16b}, [%0] \n"
"trn1 v16.16b, v0.16b, v1.16b \n"
"trn2 v17.16b, v0.16b, v1.16b \n"
"trn1 v18.16b, v2.16b, v3.16b \n"
"trn2 v19.16b, v2.16b, v3.16b \n"
"trn1 v20.16b, v4.16b, v5.16b \n"
"trn2 v21.16b, v4.16b, v5.16b \n"
"trn1 v22.16b, v6.16b, v7.16b \n"
"trn2 v23.16b, v6.16b, v7.16b \n"
"trn1 v0.8h, v16.8h, v18.8h \n"
"trn2 v1.8h, v16.8h, v18.8h \n"
"trn1 v2.8h, v20.8h, v22.8h \n"
"trn2 v3.8h, v20.8h, v22.8h \n"
"trn1 v4.8h, v17.8h, v19.8h \n"
"trn2 v5.8h, v17.8h, v19.8h \n"
"trn1 v6.8h, v21.8h, v23.8h \n"
"trn2 v7.8h, v21.8h, v23.8h \n"
"trn1 v16.4s, v0.4s, v2.4s \n"
"trn2 v17.4s, v0.4s, v2.4s \n"
"trn1 v18.4s, v1.4s, v3.4s \n"
"trn2 v19.4s, v1.4s, v3.4s \n"
"trn1 v20.4s, v4.4s, v6.4s \n"
"trn2 v21.4s, v4.4s, v6.4s \n"
"trn1 v22.4s, v5.4s, v7.4s \n"
"trn2 v23.4s, v5.4s, v7.4s \n"
"mov %0, %2 \n"
"st1 {v16.d}[0], [%0], %6 \n"
"st1 {v18.d}[0], [%0], %6 \n"
"st1 {v17.d}[0], [%0], %6 \n"
"st1 {v19.d}[0], [%0], %6 \n"
"st1 {v16.d}[1], [%0], %6 \n"
"st1 {v18.d}[1], [%0], %6 \n"
"st1 {v17.d}[1], [%0], %6 \n"
"st1 {v19.d}[1], [%0] \n"
"mov %0, %3 \n"
"st1 {v20.d}[0], [%0], %7 \n"
"st1 {v22.d}[0], [%0], %7 \n"
"st1 {v21.d}[0], [%0], %7 \n"
"st1 {v23.d}[0], [%0], %7 \n"
"st1 {v20.d}[1], [%0], %7 \n"
"st1 {v22.d}[1], [%0], %7 \n"
"st1 {v21.d}[1], [%0], %7 \n"
"st1 {v23.d}[1], [%0] \n"
"add %1, %1, #16 \n" // src += 8*2
"add %2, %2, %6, lsl #3 \n" // dst_a += 8 *
// dst_stride_a
"add %3, %3, %7, lsl #3 \n" // dst_b += 8 *
// dst_stride_b
"subs %w4, %w4, #8 \n" // w -= 8
"b.ge 1b \n"
// add 8 back to counter. if the result is 0 there are
// no residuals.
"adds %w4, %w4, #8 \n"
"b.eq 4f \n"
// some residual, so between 1 and 7 lines left to transpose
"cmp %w4, #2 \n"
"b.lt 3f \n"
"cmp %w4, #4 \n"
"b.lt 2f \n"
// TODO(frkoenig): Clean this up
// 4x8 block
"mov %0, %1 \n"
"ld1 {v0.8b}, [%0], %5 \n"
"ld1 {v1.8b}, [%0], %5 \n"
"ld1 {v2.8b}, [%0], %5 \n"
"ld1 {v3.8b}, [%0], %5 \n"
"ld1 {v4.8b}, [%0], %5 \n"
"ld1 {v5.8b}, [%0], %5 \n"
"ld1 {v6.8b}, [%0], %5 \n"
"ld1 {v7.8b}, [%0] \n"
"ld1 {v30.16b}, [%8], #16 \n"
"ld1 {v31.16b}, [%8] \n"
"tbl v16.16b, {v0.16b, v1.16b, v2.16b, v3.16b}, v30.16b \n"
"tbl v17.16b, {v0.16b, v1.16b, v2.16b, v3.16b}, v31.16b \n"
"tbl v18.16b, {v4.16b, v5.16b, v6.16b, v7.16b}, v30.16b \n"
"tbl v19.16b, {v4.16b, v5.16b, v6.16b, v7.16b}, v31.16b \n"
"mov %0, %2 \n"
"st1 {v16.s}[0], [%0], %6 \n"
"st1 {v16.s}[1], [%0], %6 \n"
"st1 {v16.s}[2], [%0], %6 \n"
"st1 {v16.s}[3], [%0], %6 \n"
"add %0, %2, #4 \n"
"st1 {v18.s}[0], [%0], %6 \n"
"st1 {v18.s}[1], [%0], %6 \n"
"st1 {v18.s}[2], [%0], %6 \n"
"st1 {v18.s}[3], [%0] \n"
"mov %0, %3 \n"
"st1 {v17.s}[0], [%0], %7 \n"
"st1 {v17.s}[1], [%0], %7 \n"
"st1 {v17.s}[2], [%0], %7 \n"
"st1 {v17.s}[3], [%0], %7 \n"
"add %0, %3, #4 \n"
"st1 {v19.s}[0], [%0], %7 \n"
"st1 {v19.s}[1], [%0], %7 \n"
"st1 {v19.s}[2], [%0], %7 \n"
"st1 {v19.s}[3], [%0] \n"
"add %1, %1, #8 \n" // src += 4 * 2
"add %2, %2, %6, lsl #2 \n" // dst_a += 4 *
// dst_stride_a
"add %3, %3, %7, lsl #2 \n" // dst_b += 4 *
// dst_stride_b
"subs %w4, %w4, #4 \n" // w -= 4
"b.eq 4f \n"
// some residual, check to see if it includes a 2x8 block,
// or less
"cmp %w4, #2 \n"
"b.lt 3f \n"
// 2x8 block
"2: \n"
"mov %0, %1 \n"
"ld2 {v0.h, v1.h}[0], [%0], %5 \n"
"ld2 {v2.h, v3.h}[0], [%0], %5 \n"
"ld2 {v0.h, v1.h}[1], [%0], %5 \n"
"ld2 {v2.h, v3.h}[1], [%0], %5 \n"
"ld2 {v0.h, v1.h}[2], [%0], %5 \n"
"ld2 {v2.h, v3.h}[2], [%0], %5 \n"
"ld2 {v0.h, v1.h}[3], [%0], %5 \n"
"ld2 {v2.h, v3.h}[3], [%0] \n"
"trn1 v4.8b, v0.8b, v2.8b \n"
"trn2 v5.8b, v0.8b, v2.8b \n"
"trn1 v6.8b, v1.8b, v3.8b \n"
"trn2 v7.8b, v1.8b, v3.8b \n"
"mov %0, %2 \n"
"st1 {v4.d}[0], [%0], %6 \n"
"st1 {v6.d}[0], [%0] \n"
"mov %0, %3 \n"
"st1 {v5.d}[0], [%0], %7 \n"
"st1 {v7.d}[0], [%0] \n"
"add %1, %1, #4 \n" // src += 2 * 2
"add %2, %2, %6, lsl #1 \n" // dst_a += 2 *
// dst_stride_a
"add %3, %3, %7, lsl #1 \n" // dst_b += 2 *
// dst_stride_b
"subs %w4, %w4, #2 \n" // w -= 2
"b.eq 4f \n"
// 1x8 block
"3: \n"
"ld2 {v0.b, v1.b}[0], [%1], %5 \n"
"ld2 {v0.b, v1.b}[1], [%1], %5 \n"
"ld2 {v0.b, v1.b}[2], [%1], %5 \n"
"ld2 {v0.b, v1.b}[3], [%1], %5 \n"
"ld2 {v0.b, v1.b}[4], [%1], %5 \n"
"ld2 {v0.b, v1.b}[5], [%1], %5 \n"
"ld2 {v0.b, v1.b}[6], [%1], %5 \n"
"ld2 {v0.b, v1.b}[7], [%1] \n"
"st1 {v0.d}[0], [%2] \n"
"st1 {v1.d}[0], [%3] \n"
"4: \n"
: "=&r"(src_temp), // %0
"+r"(src), // %1
"+r"(dst_a), // %2
"+r"(dst_b), // %3
"+r"(width) // %4
: "r"(static_cast<ptrdiff_t>(src_stride)), // %5
"r"(static_cast<ptrdiff_t>(dst_stride_a)), // %6
"r"(static_cast<ptrdiff_t>(dst_stride_b)), // %7
"r"(&kVTbl4x4TransposeDi) // %8
: "memory", "cc", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16",
"v17", "v18", "v19", "v20", "v21", "v22", "v23", "v30", "v31");
}
#endif // !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif