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libyuv/source/rotate_neon.cc
Frank Barchard 0c781f87b8 [libyuv] Keep LIBYUV_API in basic_types.h and remove legacy types and bool macros 
Reduces include/libyuv/basic_types.h to only define LIBYUV_API.
Directly includes <stdint.h> and <stddef.h> where needed in public
headers.
Replaces LIBYUV_BOOL, LIBYUV_FALSE, and LIBYUV_TRUE with C++ bool,
true, and false in C++ code (MJpegDecoder, unit tests) and int (0, 1)
for C API functions.
Updates documentation and unit tests.

Test: ninja -C out/Release libyuv_unittest && ./out/Release/libyuv_unittest --gtest_filter=*
Change-Id: I2d58e872f0f976263bcda546dcc3b1b5f7e53d58
TAG=agy
CONV=2730bc56-93ff-48ed-b615-dcde1b834394
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/8280662
Commit-Queue: Wan-Teh Chang <wtc@google.com>
Reviewed-by: Wan-Teh Chang <wtc@google.com>
2026-08-28 08:32:19 -07:00

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/*
* Copyright 2011 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"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \
!defined(__aarch64__)
void TransposeWx8_NEON(const uint8_t* src,
int src_stride,
uint8_t* dst,
int dst_stride,
int width) {
const uint8_t* 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 %[width], #8 \n"
"1: \n"
"mov %[temp], %[src] \n"
"vld1.8 {d0}, [%[temp]], %[src_stride] \n"
"vld1.8 {d1}, [%[temp]], %[src_stride] \n"
"vld1.8 {d2}, [%[temp]], %[src_stride] \n"
"vld1.8 {d3}, [%[temp]], %[src_stride] \n"
"vld1.8 {d4}, [%[temp]], %[src_stride] \n"
"vld1.8 {d5}, [%[temp]], %[src_stride] \n"
"vld1.8 {d6}, [%[temp]], %[src_stride] \n"
"vld1.8 {d7}, [%[temp]] \n"
"add %[src], #8 \n"
"vtrn.8 d1, d0 \n"
"vtrn.8 d3, d2 \n"
"vtrn.8 d5, d4 \n"
"vtrn.8 d7, d6 \n"
"subs %[width], #8 \n"
"vtrn.16 d1, d3 \n"
"vtrn.16 d0, d2 \n"
"vtrn.16 d5, d7 \n"
"vtrn.16 d4, d6 \n"
"vtrn.32 d1, d5 \n"
"vtrn.32 d0, d4 \n"
"vtrn.32 d3, d7 \n"
"vtrn.32 d2, d6 \n"
"vrev16.8 q0, q0 \n"
"vrev16.8 q1, q1 \n"
"vrev16.8 q2, q2 \n"
"vrev16.8 q3, q3 \n"
"mov %[temp], %[dst] \n"
"vst1.8 {d1}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d0}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d3}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d2}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d5}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d4}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d7}, [%[temp]], %[dst_stride] \n"
"vst1.8 {d6}, [%[temp]] \n"
"add %[dst], %[dst], %[dst_stride], lsl #3 \n"
"bge 1b \n"
: [temp] "=&r"(temp), // %[temp]
[src] "+r"(src), // %[src]
[dst] "+r"(dst), // %[dst]
[width] "+r"(width) // %[width]
: [src_stride] "r"(src_stride), // %[src_stride]
[dst_stride] "r"(dst_stride) // %[dst_stride]
: "memory", "cc", "q0", "q1", "q2", "q3");
}
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* 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 %[width], #8 \n"
"1: \n"
"mov %[temp], %[src] \n"
"vld2.8 {d0, d1}, [%[temp]], %[src_stride] \n"
"vld2.8 {d2, d3}, [%[temp]], %[src_stride] \n"
"vld2.8 {d4, d5}, [%[temp]], %[src_stride] \n"
"vld2.8 {d6, d7}, [%[temp]], %[src_stride] \n"
"vld2.8 {d16, d17}, [%[temp]], %[src_stride] \n"
"vld2.8 {d18, d19}, [%[temp]], %[src_stride] \n"
"vld2.8 {d20, d21}, [%[temp]], %[src_stride] \n"
"vld2.8 {d22, d23}, [%[temp]] \n"
"add %[src], #8*2 \n"
"vtrn.8 q1, q0 \n"
"vtrn.8 q3, q2 \n"
"vtrn.8 q9, q8 \n"
"vtrn.8 q11, q10 \n"
"subs %[width], #8 \n"
"vtrn.16 q1, q3 \n"
"vtrn.16 q0, q2 \n"
"vtrn.16 q9, q11 \n"
"vtrn.16 q8, q10 \n"
"vtrn.32 q1, q9 \n"
"vtrn.32 q0, q8 \n"
"vtrn.32 q3, q11 \n"
"vtrn.32 q2, q10 \n"
"vrev16.8 q0, q0 \n"
"vrev16.8 q1, q1 \n"
"vrev16.8 q2, q2 \n"
"vrev16.8 q3, q3 \n"
"vrev16.8 q8, q8 \n"
"vrev16.8 q9, q9 \n"
"vrev16.8 q10, q10 \n"
"vrev16.8 q11, q11 \n"
"mov %[temp], %[dst_a] \n"
"vst1.8 {d2}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d0}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d6}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d4}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d18}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d16}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d22}, [%[temp]], %[dst_stride_a] \n"
"vst1.8 {d20}, [%[temp]] \n"
"add %[dst_a], %[dst_a], %[dst_stride_a], lsl #3 \n"
"mov %[temp], %[dst_b] \n"
"vst1.8 {d3}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d1}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d7}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d5}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d19}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d17}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d23}, [%[temp]], %[dst_stride_b] \n"
"vst1.8 {d21}, [%[temp]] \n"
"add %[dst_b], %[dst_b], %[dst_stride_b], lsl #3 \n"
"bge 1b \n"
: [temp] "=&r"(temp), // %[temp]
[src] "+r"(src), // %[src]
[dst_a] "+r"(dst_a), // %[dst_a]
[dst_b] "+r"(dst_b), // %[dst_b]
[width] "+r"(width) // %[width]
: [src_stride] "r"(src_stride), // %[src_stride]
[dst_stride_a] "r"(dst_stride_a), // %[dst_stride_a]
[dst_stride_b] "r"(dst_stride_b) // %[dst_stride_b]
: "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11");
}
// Transpose 32 bit values (ARGB)
void Transpose4x4_32_NEON(const uint8_t* src,
int src_stride,
uint8_t* dst,
int dst_stride,
int width) {
const uint8_t* src1 = src + src_stride;
const uint8_t* src2 = src1 + src_stride;
const uint8_t* src3 = src2 + src_stride;
uint8_t* dst1 = dst + dst_stride;
uint8_t* dst2 = dst1 + dst_stride;
uint8_t* dst3 = dst2 + dst_stride;
asm volatile(
// Main loop transpose 4x4. Read a column, write a row.
"1: \n"
"vld4.32 {d0[0], d2[0], d4[0], d6[0]}, [%0], %9 \n"
"vld4.32 {d0[1], d2[1], d4[1], d6[1]}, [%1], %9 \n"
"vld4.32 {d1[0], d3[0], d5[0], d7[0]}, [%2], %9 \n"
"vld4.32 {d1[1], d3[1], d5[1], d7[1]}, [%3], %9 \n"
"subs %8, %8, #4 \n" // w -= 4
"vst1.8 {q0}, [%4]! \n"
"vst1.8 {q1}, [%5]! \n"
"vst1.8 {q2}, [%6]! \n"
"vst1.8 {q3}, [%7]! \n"
"bgt 1b \n"
: "+r"(src), // %0
"+r"(src1), // %1
"+r"(src2), // %2
"+r"(src3), // %3
"+r"(dst), // %4
"+r"(dst1), // %5
"+r"(dst2), // %6
"+r"(dst3), // %7
"+r"(width) // %8
: "r"((ptrdiff_t)src_stride * 4) // %9
: "memory", "cc", "q0", "q1", "q2", "q3");
}
#endif // defined(__ARM_NEON__) && !defined(__aarch64__)
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
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