ref: e436930c39acaf71fed5ca830dcac6878de95b9d
dir: /third_party/libyuv/source/rotate_neon.cc/
/*
* 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"
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_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 %5, #8 \n"
// handle 8x8 blocks. this should be the majority of the plane
"1: \n"
"mov %0, %1 \n"
"vld1.8 {d0}, [%0], %2 \n"
"vld1.8 {d1}, [%0], %2 \n"
"vld1.8 {d2}, [%0], %2 \n"
"vld1.8 {d3}, [%0], %2 \n"
"vld1.8 {d4}, [%0], %2 \n"
"vld1.8 {d5}, [%0], %2 \n"
"vld1.8 {d6}, [%0], %2 \n"
"vld1.8 {d7}, [%0] \n"
"vtrn.8 d1, d0 \n"
"vtrn.8 d3, d2 \n"
"vtrn.8 d5, d4 \n"
"vtrn.8 d7, d6 \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 %0, %3 \n"
"vst1.8 {d1}, [%0], %4 \n"
"vst1.8 {d0}, [%0], %4 \n"
"vst1.8 {d3}, [%0], %4 \n"
"vst1.8 {d2}, [%0], %4 \n"
"vst1.8 {d5}, [%0], %4 \n"
"vst1.8 {d4}, [%0], %4 \n"
"vst1.8 {d7}, [%0], %4 \n"
"vst1.8 {d6}, [%0] \n"
"add %1, #8 \n" // src += 8
"add %3, %3, %4, lsl #3 \n" // dst += 8 * dst_stride
"subs %5, #8 \n" // w -= 8
"bge 1b \n"
// add 8 back to counter. if the result is 0 there are
// no residuals.
"adds %5, #8 \n"
"beq 4f \n"
// some residual, so between 1 and 7 lines left to transpose
"cmp %5, #2 \n"
"blt 3f \n"
"cmp %5, #4 \n"
"blt 2f \n"
// 4x8 block
"mov %0, %1 \n"
"vld1.32 {d0[0]}, [%0], %2 \n"
"vld1.32 {d0[1]}, [%0], %2 \n"
"vld1.32 {d1[0]}, [%0], %2 \n"
"vld1.32 {d1[1]}, [%0], %2 \n"
"vld1.32 {d2[0]}, [%0], %2 \n"
"vld1.32 {d2[1]}, [%0], %2 \n"
"vld1.32 {d3[0]}, [%0], %2 \n"
"vld1.32 {d3[1]}, [%0] \n"
"mov %0, %3 \n"
"vld1.8 {q3}, [%6] \n"
"vtbl.8 d4, {d0, d1}, d6 \n"
"vtbl.8 d5, {d0, d1}, d7 \n"
"vtbl.8 d0, {d2, d3}, d6 \n"
"vtbl.8 d1, {d2, d3}, d7 \n"
// TODO(frkoenig): Rework shuffle above to
// write out with 4 instead of 8 writes.
"vst1.32 {d4[0]}, [%0], %4 \n"
"vst1.32 {d4[1]}, [%0], %4 \n"
"vst1.32 {d5[0]}, [%0], %4 \n"
"vst1.32 {d5[1]}, [%0] \n"
"add %0, %3, #4 \n"
"vst1.32 {d0[0]}, [%0], %4 \n"
"vst1.32 {d0[1]}, [%0], %4 \n"
"vst1.32 {d1[0]}, [%0], %4 \n"
"vst1.32 {d1[1]}, [%0] \n"
"add %1, #4 \n" // src += 4
"add %3, %3, %4, lsl #2 \n" // dst += 4 * dst_stride
"subs %5, #4 \n" // w -= 4
"beq 4f \n"
// some residual, check to see if it includes a 2x8 block,
// or less
"cmp %5, #2 \n"
"blt 3f \n"
// 2x8 block
"2: \n"
"mov %0, %1 \n"
"vld1.16 {d0[0]}, [%0], %2 \n"
"vld1.16 {d1[0]}, [%0], %2 \n"
"vld1.16 {d0[1]}, [%0], %2 \n"
"vld1.16 {d1[1]}, [%0], %2 \n"
"vld1.16 {d0[2]}, [%0], %2 \n"
"vld1.16 {d1[2]}, [%0], %2 \n"
"vld1.16 {d0[3]}, [%0], %2 \n"
"vld1.16 {d1[3]}, [%0] \n"
"vtrn.8 d0, d1 \n"
"mov %0, %3 \n"
"vst1.64 {d0}, [%0], %4 \n"
"vst1.64 {d1}, [%0] \n"
"add %1, #2 \n" // src += 2
"add %3, %3, %4, lsl #1 \n" // dst += 2 * dst_stride
"subs %5, #2 \n" // w -= 2
"beq 4f \n"
// 1x8 block
"3: \n"
"vld1.8 {d0[0]}, [%1], %2 \n"
"vld1.8 {d0[1]}, [%1], %2 \n"
"vld1.8 {d0[2]}, [%1], %2 \n"
"vld1.8 {d0[3]}, [%1], %2 \n"
"vld1.8 {d0[4]}, [%1], %2 \n"
"vld1.8 {d0[5]}, [%1], %2 \n"
"vld1.8 {d0[6]}, [%1], %2 \n"
"vld1.8 {d0[7]}, [%1] \n"
"vst1.64 {d0}, [%3] \n"
"4: \n"
: "=&r"(src_temp), // %0
"+r"(src), // %1
"+r"(src_stride), // %2
"+r"(dst), // %3
"+r"(dst_stride), // %4
"+r"(width) // %5
: "r"(&kVTbl4x4Transpose) // %6
: "memory", "cc", "q0", "q1", "q2", "q3");
}
static const uvec8 kVTbl4x4TransposeDi = {0, 8, 1, 9, 2, 10, 3, 11,
4, 12, 5, 13, 6, 14, 7, 15};
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 %7, #8 \n"
// handle 8x8 blocks. this should be the majority of the plane
"1: \n"
"mov %0, %1 \n"
"vld2.8 {d0, d1}, [%0], %2 \n"
"vld2.8 {d2, d3}, [%0], %2 \n"
"vld2.8 {d4, d5}, [%0], %2 \n"
"vld2.8 {d6, d7}, [%0], %2 \n"
"vld2.8 {d16, d17}, [%0], %2 \n"
"vld2.8 {d18, d19}, [%0], %2 \n"
"vld2.8 {d20, d21}, [%0], %2 \n"
"vld2.8 {d22, d23}, [%0] \n"
"vtrn.8 q1, q0 \n"
"vtrn.8 q3, q2 \n"
"vtrn.8 q9, q8 \n"
"vtrn.8 q11, q10 \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 %0, %3 \n"
"vst1.8 {d2}, [%0], %4 \n"
"vst1.8 {d0}, [%0], %4 \n"
"vst1.8 {d6}, [%0], %4 \n"
"vst1.8 {d4}, [%0], %4 \n"
"vst1.8 {d18}, [%0], %4 \n"
"vst1.8 {d16}, [%0], %4 \n"
"vst1.8 {d22}, [%0], %4 \n"
"vst1.8 {d20}, [%0] \n"
"mov %0, %5 \n"
"vst1.8 {d3}, [%0], %6 \n"
"vst1.8 {d1}, [%0], %6 \n"
"vst1.8 {d7}, [%0], %6 \n"
"vst1.8 {d5}, [%0], %6 \n"
"vst1.8 {d19}, [%0], %6 \n"
"vst1.8 {d17}, [%0], %6 \n"
"vst1.8 {d23}, [%0], %6 \n"
"vst1.8 {d21}, [%0] \n"
"add %1, #8*2 \n" // src += 8*2
"add %3, %3, %4, lsl #3 \n" // dst_a += 8 * dst_stride_a
"add %5, %5, %6, lsl #3 \n" // dst_b += 8 * dst_stride_b
"subs %7, #8 \n" // w -= 8
"bge 1b \n"
// add 8 back to counter. if the result is 0 there are
// no residuals.
"adds %7, #8 \n"
"beq 4f \n"
// some residual, so between 1 and 7 lines left to transpose
"cmp %7, #2 \n"
"blt 3f \n"
"cmp %7, #4 \n"
"blt 2f \n"
// TODO(frkoenig): Clean this up
// 4x8 block
"mov %0, %1 \n"
"vld1.64 {d0}, [%0], %2 \n"
"vld1.64 {d1}, [%0], %2 \n"
"vld1.64 {d2}, [%0], %2 \n"
"vld1.64 {d3}, [%0], %2 \n"
"vld1.64 {d4}, [%0], %2 \n"
"vld1.64 {d5}, [%0], %2 \n"
"vld1.64 {d6}, [%0], %2 \n"
"vld1.64 {d7}, [%0] \n"
"vld1.8 {q15}, [%8] \n"
"vtrn.8 q0, q1 \n"
"vtrn.8 q2, q3 \n"
"vtbl.8 d16, {d0, d1}, d30 \n"
"vtbl.8 d17, {d0, d1}, d31 \n"
"vtbl.8 d18, {d2, d3}, d30 \n"
"vtbl.8 d19, {d2, d3}, d31 \n"
"vtbl.8 d20, {d4, d5}, d30 \n"
"vtbl.8 d21, {d4, d5}, d31 \n"
"vtbl.8 d22, {d6, d7}, d30 \n"
"vtbl.8 d23, {d6, d7}, d31 \n"
"mov %0, %3 \n"
"vst1.32 {d16[0]}, [%0], %4 \n"
"vst1.32 {d16[1]}, [%0], %4 \n"
"vst1.32 {d17[0]}, [%0], %4 \n"
"vst1.32 {d17[1]}, [%0], %4 \n"
"add %0, %3, #4 \n"
"vst1.32 {d20[0]}, [%0], %4 \n"
"vst1.32 {d20[1]}, [%0], %4 \n"
"vst1.32 {d21[0]}, [%0], %4 \n"
"vst1.32 {d21[1]}, [%0] \n"
"mov %0, %5 \n"
"vst1.32 {d18[0]}, [%0], %6 \n"
"vst1.32 {d18[1]}, [%0], %6 \n"
"vst1.32 {d19[0]}, [%0], %6 \n"
"vst1.32 {d19[1]}, [%0], %6 \n"
"add %0, %5, #4 \n"
"vst1.32 {d22[0]}, [%0], %6 \n"
"vst1.32 {d22[1]}, [%0], %6 \n"
"vst1.32 {d23[0]}, [%0], %6 \n"
"vst1.32 {d23[1]}, [%0] \n"
"add %1, #4*2 \n" // src += 4 * 2
"add %3, %3, %4, lsl #2 \n" // dst_a += 4 *
// dst_stride_a
"add %5, %5, %6, lsl #2 \n" // dst_b += 4 *
// dst_stride_b
"subs %7, #4 \n" // w -= 4
"beq 4f \n"
// some residual, check to see if it includes a 2x8 block,
// or less
"cmp %7, #2 \n"
"blt 3f \n"
// 2x8 block
"2: \n"
"mov %0, %1 \n"
"vld2.16 {d0[0], d2[0]}, [%0], %2 \n"
"vld2.16 {d1[0], d3[0]}, [%0], %2 \n"
"vld2.16 {d0[1], d2[1]}, [%0], %2 \n"
"vld2.16 {d1[1], d3[1]}, [%0], %2 \n"
"vld2.16 {d0[2], d2[2]}, [%0], %2 \n"
"vld2.16 {d1[2], d3[2]}, [%0], %2 \n"
"vld2.16 {d0[3], d2[3]}, [%0], %2 \n"
"vld2.16 {d1[3], d3[3]}, [%0] \n"
"vtrn.8 d0, d1 \n"
"vtrn.8 d2, d3 \n"
"mov %0, %3 \n"
"vst1.64 {d0}, [%0], %4 \n"
"vst1.64 {d2}, [%0] \n"
"mov %0, %5 \n"
"vst1.64 {d1}, [%0], %6 \n"
"vst1.64 {d3}, [%0] \n"
"add %1, #2*2 \n" // src += 2 * 2
"add %3, %3, %4, lsl #1 \n" // dst_a += 2 *
// dst_stride_a
"add %5, %5, %6, lsl #1 \n" // dst_b += 2 *
// dst_stride_b
"subs %7, #2 \n" // w -= 2
"beq 4f \n"
// 1x8 block
"3: \n"
"vld2.8 {d0[0], d1[0]}, [%1], %2 \n"
"vld2.8 {d0[1], d1[1]}, [%1], %2 \n"
"vld2.8 {d0[2], d1[2]}, [%1], %2 \n"
"vld2.8 {d0[3], d1[3]}, [%1], %2 \n"
"vld2.8 {d0[4], d1[4]}, [%1], %2 \n"
"vld2.8 {d0[5], d1[5]}, [%1], %2 \n"
"vld2.8 {d0[6], d1[6]}, [%1], %2 \n"
"vld2.8 {d0[7], d1[7]}, [%1] \n"
"vst1.64 {d0}, [%3] \n"
"vst1.64 {d1}, [%5] \n"
"4: \n"
: "=&r"(src_temp), // %0
"+r"(src), // %1
"+r"(src_stride), // %2
"+r"(dst_a), // %3
"+r"(dst_stride_a), // %4
"+r"(dst_b), // %5
"+r"(dst_stride_b), // %6
"+r"(width) // %7
: "r"(&kVTbl4x4TransposeDi) // %8
: "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11");
}
#endif // defined(__ARM_NEON__) && !defined(__aarch64__)
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif