/*
* 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/row.h"
#include "libyuv/basic_types.h"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
#if !defined(YUV_DISABLE_ASM) && defined(__ARM_NEON__)
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* src, int src_stride,
uint8* dst, int dst_stride,
int width) {
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 %4, #8 \n"
// handle 8x8 blocks. this should be the majority of the plane
".p2align 4 \n"
"1: \n"
"mov r9, %0 \n"
"vld1.8 {d0}, [r9], %1 \n"
"vld1.8 {d1}, [r9], %1 \n"
"vld1.8 {d2}, [r9], %1 \n"
"vld1.8 {d3}, [r9], %1 \n"
"vld1.8 {d4}, [r9], %1 \n"
"vld1.8 {d5}, [r9], %1 \n"
"vld1.8 {d6}, [r9], %1 \n"
"vld1.8 {d7}, [r9] \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 r9, %2 \n"
"vst1.8 {d1}, [r9], %3 \n"
"vst1.8 {d0}, [r9], %3 \n"
"vst1.8 {d3}, [r9], %3 \n"
"vst1.8 {d2}, [r9], %3 \n"
"vst1.8 {d5}, [r9], %3 \n"
"vst1.8 {d4}, [r9], %3 \n"
"vst1.8 {d7}, [r9], %3 \n"
"vst1.8 {d6}, [r9] \n"
"add %0, #8 \n" // src += 8
"add %2, %2, %3, lsl #3 \n" // dst += 8 * dst_stride
"subs %4, #8 \n" // w -= 8
"bge 1b \n"
// add 8 back to counter. if the result is 0 there are
// no residuals.
"adds %4, #8 \n"
"beq 4f \n"
// some residual, so between 1 and 7 lines left to transpose
"cmp %4, #2 \n"
"blt 3f \n"
"cmp %4, #4 \n"
"blt 2f \n"
// 4x8 block
"mov r9, %0 \n"
"vld1.32 {d0[0]}, [r9], %1 \n"
"vld1.32 {d0[1]}, [r9], %1 \n"
"vld1.32 {d1[0]}, [r9], %1 \n"
"vld1.32 {d1[1]}, [r9], %1 \n"
"vld1.32 {d2[0]}, [r9], %1 \n"
"vld1.32 {d2[1]}, [r9], %1 \n"
"vld1.32 {d3[0]}, [r9], %1 \n"
"vld1.32 {d3[1]}, [r9] \n"
"mov r9, %2 \n"
"vld1.8 {q3}, [%5] \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: rework shuffle above to write
// out with 4 instead of 8 writes
"vst1.32 {d4[0]}, [r9], %3 \n"
"vst1.32 {d4[1]}, [r9], %3 \n"
"vst1.32 {d5[0]}, [r9], %3 \n"
"vst1.32 {d5[1]}, [r9] \n"
"add r9, %2, #4 \n"
"vst1.32 {d0[0]}, [r9], %3 \n"
"vst1.32 {d0[1]}, [r9], %3 \n"
"vst1.32 {d1[0]}, [r9], %3 \n"
"vst1.32 {d1[1]}, [r9] \n"
"add %0, #4 \n" // src += 4
"add %2, %2, %3, lsl #2 \n" // dst += 4 * dst_stride
"subs %4, #4 \n" // w -= 4
"beq 4f \n"
// some residual, check to see if it includes a 2x8 block,
// or less
"cmp %4, #2 \n"
"blt 3f \n"
// 2x8 block
"2: \n"
"mov r9, %0 \n"
"vld1.16 {d0[0]}, [r9], %1 \n"
"vld1.16 {d1[0]}, [r9], %1 \n"
"vld1.16 {d0[1]}, [r9], %1 \n"
"vld1.16 {d1[1]}, [r9], %1 \n"
"vld1.16 {d0[2]}, [r9], %1 \n"
"vld1.16 {d1[2]}, [r9], %1 \n"
"vld1.16 {d0[3]}, [r9], %1 \n"
"vld1.16 {d1[3]}, [r9] \n"
"vtrn.8 d0, d1 \n"
"mov r9, %2 \n"
"vst1.64 {d0}, [r9], %3 \n"
"vst1.64 {d1}, [r9] \n"
"add %0, #2 \n" // src += 2
"add %2, %2, %3, lsl #1 \n" // dst += 2 * dst_stride
"subs %4, #2 \n" // w -= 2
"beq 4f \n"
// 1x8 block
"3: \n"
"vld1.8 {d0[0]}, [%0], %1 \n"
"vld1.8 {d0[1]}, [%0], %1 \n"
"vld1.8 {d0[2]}, [%0], %1 \n"
"vld1.8 {d0[3]}, [%0], %1 \n"
"vld1.8 {d0[4]}, [%0], %1 \n"
"vld1.8 {d0[5]}, [%0], %1 \n"
"vld1.8 {d0[6]}, [%0], %1 \n"
"vld1.8 {d0[7]}, [%0] \n"
"vst1.64 {d0}, [%2] \n"
"4: \n"
: "+r"(src), // %0
"+r"(src_stride), // %1
"+r"(dst), // %2
"+r"(dst_stride), // %3
"+r"(width) // %4
: "r"(&kVTbl4x4Transpose) // %5
: "memory", "cc", "r9", "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* src, int src_stride,
uint8* dst_a, int dst_stride_a,
uint8* dst_b, int dst_stride_b,
int width) {
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 %6, #8 \n"
// handle 8x8 blocks. this should be the majority of the plane
".p2align 4 \n"
"1: \n"
"mov r9, %0 \n"
"vld2.8 {d0, d1}, [r9], %1 \n"
"vld2.8 {d2, d3}, [r9], %1 \n"
"vld2.8 {d4, d5}, [r9], %1 \n"
"vld2.8 {d6, d7}, [r9], %1 \n"
"vld2.8 {d16, d17}, [r9], %1 \n"
"vld2.8 {d18, d19}, [r9], %1 \n"
"vld2.8 {d20, d21}, [r9], %1 \n"
"vld2.8 {d22, d23}, [r9] \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 r9, %2 \n"
"vst1.8 {d2}, [r9], %3 \n"
"vst1.8 {d0}, [r9], %3 \n"
"vst1.8 {d6}, [r9], %3 \n"
"vst1.8 {d4}, [r9], %3 \n"
"vst1.8 {d18}, [r9], %3 \n"
"vst1.8 {d16}, [r9], %3 \n"
"vst1.8 {d22}, [r9], %3 \n"
"vst1.8 {d20}, [r9] \n"
"mov r9, %4 \n"
"vst1.8 {d3}, [r9], %5 \n"
"vst1.8 {d1}, [r9], %5 \n"
"vst1.8 {d7}, [r9], %5 \n"
"vst1.8 {d5}, [r9], %5 \n"
"vst1.8 {d19}, [r9], %5 \n"
"vst1.8 {d17}, [r9], %5 \n"
"vst1.8 {d23}, [r9], %5 \n"
"vst1.8 {d21}, [r9] \n"
"add %0, #8*2 \n" // src += 8*2
"add %2, %2, %3, lsl #3 \n" // dst_a += 8 * dst_stride_a
"add %4, %4, %5, lsl #3 \n" // dst_b += 8 * dst_stride_b
"subs %6, #8 \n" // w -= 8
"bge 1b \n"
// add 8 back to counter. if the result is 0 there are
// no residuals.
"adds %6, #8 \n"
"beq 4f \n"
// some residual, so between 1 and 7 lines left to transpose
"cmp %6, #2 \n"
"blt 3f \n"
"cmp %6, #4 \n"
"blt 2f \n"
//TODO(frkoenig) : clean this up
// 4x8 block
"mov r9, %0 \n"
"vld1.64 {d0}, [r9], %1 \n"
"vld1.64 {d1}, [r9], %1 \n"
"vld1.64 {d2}, [r9], %1 \n"
"vld1.64 {d3}, [r9], %1 \n"
"vld1.64 {d4}, [r9], %1 \n"
"vld1.64 {d5}, [r9], %1 \n"
"vld1.64 {d6}, [r9], %1 \n"
"vld1.64 {d7}, [r9] \n"
"vld1.8 {q15}, [%7] \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 r9, %2 \n"
"vst1.32 {d16[0]}, [r9], %3 \n"
"vst1.32 {d16[1]}, [r9], %3 \n"
"vst1.32 {d17[0]}, [r9], %3 \n"
"vst1.32 {d17[1]}, [r9], %3 \n"
"add r9, %2, #4 \n"
"vst1.32 {d20[0]}, [r9], %3 \n"
"vst1.32 {d20[1]}, [r9], %3 \n"
"vst1.32 {d21[0]}, [r9], %3 \n"
"vst1.32 {d21[1]}, [r9] \n"
"mov r9, %4 \n"
"vst1.32 {d18[0]}, [r9], %5 \n"
"vst1.32 {d18[1]}, [r9], %5 \n"
"vst1.32 {d19[0]}, [r9], %5 \n"
"vst1.32 {d19[1]}, [r9], %5 \n"
"add r9, %4, #4 \n"
"vst1.32 {d22[0]}, [r9], %5 \n"
"vst1.32 {d22[1]}, [r9], %5 \n"
"vst1.32 {d23[0]}, [r9], %5 \n"
"vst1.32 {d23[1]}, [r9] \n"
"add %0, #4*2 \n" // src += 4 * 2
"add %2, %2, %3, lsl #2 \n" // dst_a += 4 * dst_stride_a
"add %4, %4, %5, lsl #2 \n" // dst_b += 4 * dst_stride_b
"subs %6, #4 \n" // w -= 4
"beq 4f \n"
// some residual, check to see if it includes a 2x8 block,
// or less
"cmp %6, #2 \n"
"blt 3f \n"
// 2x8 block
"2: \n"
"mov r9, %0 \n"
"vld2.16 {d0[0], d2[0]}, [r9], %1 \n"
"vld2.16 {d1[0], d3[0]}, [r9], %1 \n"
"vld2.16 {d0[1], d2[1]}, [r9], %1 \n"
"vld2.16 {d1[1], d3[1]}, [r9], %1 \n"
"vld2.16 {d0[2], d2[2]}, [r9], %1 \n"
"vld2.16 {d1[2], d3[2]}, [r9], %1 \n"
"vld2.16 {d0[3], d2[3]}, [r9], %1 \n"
"vld2.16 {d1[3], d3[3]}, [r9] \n"
"vtrn.8 d0, d1 \n"
"vtrn.8 d2, d3 \n"
"mov r9, %2 \n"
"vst1.64 {d0}, [r9], %3 \n"
"vst1.64 {d2}, [r9] \n"
"mov r9, %4 \n"
"vst1.64 {d1}, [r9], %5 \n"
"vst1.64 {d3}, [r9] \n"
"add %0, #2*2 \n" // src += 2 * 2
"add %2, %2, %3, lsl #1 \n" // dst_a += 2 * dst_stride_a
"add %4, %4, %5, lsl #1 \n" // dst_b += 2 * dst_stride_b
"subs %6, #2 \n" // w -= 2
"beq 4f \n"
// 1x8 block
"3: \n"
"vld2.8 {d0[0], d1[0]}, [%0], %1 \n"
"vld2.8 {d0[1], d1[1]}, [%0], %1 \n"
"vld2.8 {d0[2], d1[2]}, [%0], %1 \n"
"vld2.8 {d0[3], d1[3]}, [%0], %1 \n"
"vld2.8 {d0[4], d1[4]}, [%0], %1 \n"
"vld2.8 {d0[5], d1[5]}, [%0], %1 \n"
"vld2.8 {d0[6], d1[6]}, [%0], %1 \n"
"vld2.8 {d0[7], d1[7]}, [%0] \n"
"vst1.64 {d0}, [%2] \n"
"vst1.64 {d1}, [%4] \n"
"4: \n"
: "+r"(src), // %0
"+r"(src_stride), // %1
"+r"(dst_a), // %2
"+r"(dst_stride_a), // %3
"+r"(dst_b), // %4
"+r"(dst_stride_b), // %5
"+r"(width) // %6
: "r"(&kVTbl4x4TransposeDi) // %7
: "memory", "cc", "r9",
"q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11"
);
}
#endif
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif