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https://chromium.googlesource.com/libyuv/libyuv
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2b9c210803
BUG=none TEST=gcl lint lintfix2 Review URL: https://webrtc-codereview.appspot.com/458003 git-svn-id: http://libyuv.googlecode.com/svn/trunk@220 16f28f9a-4ce2-e073-06de-1de4eb20be90
336 lines
14 KiB
C++
336 lines
14 KiB
C++
/*
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* Copyright (c) 2011 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 "source/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(__ARM_NEON__) && !defined(YUV_DISABLE_ASM)
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#define YUVTORGB \
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"vld1.u8 {d0}, [%0]! \n" \
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"vld1.u32 {d2[0]}, [%1]! \n" \
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"vld1.u32 {d2[1]}, [%2]! \n" \
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"veor.u8 d2, d26 \n"/*subtract 128 from u and v*/\
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"vmull.s8 q8, d2, d24 \n"/* u/v B/R component */\
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"vmull.s8 q9, d2, d25 \n"/* u/v G component */\
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"vmov.u8 d1, #0 \n"/* split odd/even y apart */\
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"vtrn.u8 d0, d1 \n" \
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"vsub.s16 q0, q0, q15 \n"/* offset y */\
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"vmul.s16 q0, q0, q14 \n" \
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"vadd.s16 d18, d19 \n" \
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"vqadd.s16 d20, d0, d16 \n" \
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"vqadd.s16 d21, d1, d16 \n" \
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"vqadd.s16 d22, d0, d17 \n" \
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"vqadd.s16 d23, d1, d17 \n" \
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"vqadd.s16 d16, d0, d18 \n" \
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"vqadd.s16 d17, d1, d18 \n" \
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"vqrshrun.s16 d0, q10, #6 \n" \
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"vqrshrun.s16 d1, q11, #6 \n" \
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"vqrshrun.s16 d2, q8, #6 \n" \
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"vmovl.u8 q10, d0 \n"/* set up for reinterleave*/\
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"vmovl.u8 q11, d1 \n" \
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"vmovl.u8 q8, d2 \n" \
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"vtrn.u8 d20, d21 \n" \
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"vtrn.u8 d22, d23 \n" \
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"vtrn.u8 d16, d17 \n" \
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#if defined(HAS_I420TOARGBROW_NEON) || \
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defined(HAS_I420TOBGRAROW_NEON) || \
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defined(HAS_I420TOABGRROW_NEON)
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static const vec8 kUVToRB = { 127, 127, 127, 127, 102, 102, 102, 102,
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0, 0, 0, 0, 0, 0, 0, 0 };
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static const vec8 kUVToG = { -25, -25, -25, -25, -52, -52, -52, -52,
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0, 0, 0, 0, 0, 0, 0, 0 };
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#endif
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#ifdef HAS_I420TOARGBROW_NEON
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void I420ToARGBRow_NEON(const uint8* y_buf,
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const uint8* u_buf,
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const uint8* v_buf,
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uint8* rgb_buf,
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int width) {
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asm volatile(
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"vld1.u8 {d24}, [%5] \n"
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"vld1.u8 {d25}, [%6] \n"
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"vmov.u8 d26, #128 \n"
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"vmov.u16 q14, #74 \n"
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"vmov.u16 q15, #16 \n"
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"1: \n"
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YUVTORGB
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"vmov.u8 d21, d16 \n"
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"vmov.u8 d23, #255 \n"
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"vst4.u8 {d20, d21, d22, d23}, [%3]! \n"
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"subs %4, %4, #8 \n"
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"bgt 1b \n"
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: "+r"(y_buf), // %0
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"+r"(u_buf), // %1
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"+r"(v_buf), // %2
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"+r"(rgb_buf), // %3
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"+r"(width) // %4
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: "r"(kUVToRB), // %5
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"r"(kUVToG) // %6
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: "cc", "memory", "q0", "q1", "q2", "q3", "q8", "q9",
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"q10", "q11", "q12", "q13", "q14", "q15"
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);
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}
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#endif
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#ifdef HAS_I420TOBGRAROW_NEON
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void I420ToBGRARow_NEON(const uint8* y_buf,
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const uint8* u_buf,
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const uint8* v_buf,
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uint8* rgb_buf,
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int width) {
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asm volatile(
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"vld1.u8 {d24}, [%5] \n"
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"vld1.u8 {d25}, [%6] \n"
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"vmov.u8 d26, #128 \n"
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"vmov.u16 q14, #74 \n"
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"vmov.u16 q15, #16 \n"
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"1: \n"
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YUVTORGB
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"vswp.u8 d20, d22 \n"
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"vmov.u8 d21, d16 \n"
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"vmov.u8 d19, #255 \n"
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"vst4.u8 {d19, d20, d21, d22}, [%3]! \n"
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"subs %4, %4, #8 \n"
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"bgt 1b \n"
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: "+r"(y_buf), // %0
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"+r"(u_buf), // %1
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"+r"(v_buf), // %2
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"+r"(rgb_buf), // %3
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"+r"(width) // %4
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: "r"(kUVToRB), // %5
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"r"(kUVToG) // %6
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: "cc", "memory", "q0", "q1", "q2", "q3", "q8", "q9",
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"q10", "q11", "q12", "q13", "q14", "q15"
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);
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}
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#endif
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#ifdef HAS_I420TOABGRROW_NEON
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void I420ToABGRRow_NEON(const uint8* y_buf,
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const uint8* u_buf,
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const uint8* v_buf,
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uint8* rgb_buf,
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int width) {
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asm volatile(
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"vld1.u8 {d24}, [%5] \n"
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"vld1.u8 {d25}, [%6] \n"
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"vmov.u8 d26, #128 \n"
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"vmov.u16 q14, #74 \n"
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"vmov.u16 q15, #16 \n"
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"1: \n"
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YUVTORGB
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"vswp.u8 d20, d22 \n"
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"vmov.u8 d21, d16 \n"
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"vmov.u8 d23, #255 \n"
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"vst4.u8 {d20, d21, d22, d23}, [%3]! \n"
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"subs %4, %4, #8 \n"
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"bgt 1b \n"
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: "+r"(y_buf), // %0
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"+r"(u_buf), // %1
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"+r"(v_buf), // %2
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"+r"(rgb_buf), // %3
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"+r"(width) // %4
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: "r"(kUVToRB), // %5
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"r"(kUVToG) // %6
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: "cc", "memory", "q0", "q1", "q2", "q3", "q8", "q9",
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"q10", "q11", "q12", "q13", "q14", "q15"
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);
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}
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#endif
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#ifdef HAS_SPLITUV_NEON
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// Reads 16 pairs of UV and write even values to dst_u and odd to dst_v
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// Alignment requirement: 16 bytes for pointers, and multiple of 16 pixels.
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void SplitUV_NEON(const uint8* src_uv, uint8* dst_u, uint8* dst_v, int width) {
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asm volatile(
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"1: \n"
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"vld2.u8 {q0,q1}, [%0]! \n" // load 16 pairs of UV
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"subs %3, %3, #16 \n" // 16 processed per loop
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"vst1.u8 {q0}, [%1]! \n" // store U
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"vst1.u8 {q1}, [%2]! \n" // Store V
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"bgt 1b \n"
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: "+r"(src_uv), // %0
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"+r"(dst_u), // %1
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"+r"(dst_v), // %2
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"+r"(width) // %3 // Output registers
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: // Input registers
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: "memory", "cc", "q0", "q1" // Clobber List
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);
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}
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#endif
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#ifdef HAS_COPYROW_NEON
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// Copy multiple of 64
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void CopyRow_NEON(const uint8* src, uint8* dst, int count) {
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asm volatile(
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"1: \n"
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"pld [%0, #0xC0] \n" // preload
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"vldm %0!,{q0,q1,q2,q3} \n" // load 64
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"subs %2, %2, #64 \n" // 64 processed per loop
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"vstm %1!,{q0,q1,q2,q3} \n" // store 64
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"bgt 1b \n"
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: "+r"(src), // %0
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"+r"(dst), // %1
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"+r"(count) // %2 // Output registers
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: // Input registers
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: "memory", "cc", "q0", "q1", "q2", "q3" // Clobber List
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);
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}
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#endif // HAS_COPYROW_NEON
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#ifdef HAS_MIRRORROW_NEON
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void MirrorRow_NEON(const uint8* src, uint8* dst, int width) {
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asm volatile(
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// compute where to start writing destination
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"add %1, %2 \n"
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// work on segments that are multiples of 16
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"lsrs r3, %2, #4 \n"
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// the output is written in two block. 8 bytes followed
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// by another 8. reading is done sequentially, from left to
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// right. writing is done from right to left in block sizes
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// %1, the destination pointer is incremented after writing
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// the first of the two blocks. need to subtract that 8 off
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// along with 16 to get the next location.
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"mov r3, #-24 \n"
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"beq 2f \n"
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// back of destination by the size of the register that is
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// going to be mirrored
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"sub %1, #16 \n"
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// the loop needs to run on blocks of 16. what will be left
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// over is either a negative number, the residuals that need
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// to be done, or 0. if this isn't subtracted off here the
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// loop will run one extra time.
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"sub %2, #16 \n"
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// mirror the bytes in the 64 bit segments. unable to mirror
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// the bytes in the entire 128 bits in one go.
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// because of the inability to mirror the entire 128 bits
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// mirror the writing out of the two 64 bit segments.
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"1: \n"
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"vld1.8 {q0}, [%0]! \n" // src += 16
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"vrev64.8 q0, q0 \n"
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"vst1.8 {d1}, [%1]! \n"
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"vst1.8 {d0}, [%1], r3 \n" // dst -= 16
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"subs %2, #16 \n"
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"bge 1b \n"
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// add 16 back to the counter. if the result is 0 there is no
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// residuals so jump past
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"adds %2, #16 \n"
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"beq 5f \n"
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"add %1, #16 \n"
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"2: \n"
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"mov r3, #-3 \n"
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"sub %1, #2 \n"
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"subs %2, #2 \n"
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// check for 16*n+1 scenarios where segments_of_2 should not
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// be run, but there is something left over.
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"blt 4f \n"
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// do this in neon registers as per
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// http://blogs.arm.com/software-enablement/196-coding-for-neon-part-2-dealing-with-leftovers/
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"3: \n"
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"vld2.8 {d0[0], d1[0]}, [%0]! \n" // src += 2
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"vst1.8 {d1[0]}, [%1]! \n"
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"vst1.8 {d0[0]}, [%1], r3 \n" // dst -= 2
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"subs %2, #2 \n"
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"bge 3b \n"
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"adds %2, #2 \n"
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"beq 5f \n"
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"4: \n"
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"add %1, #1 \n"
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"vld1.8 {d0[0]}, [%0] \n"
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"vst1.8 {d0[0]}, [%1] \n"
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"5: \n"
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: "+r"(src), // %0
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"+r"(dst), // %1
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"+r"(width) // %2
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:
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: "memory", "cc", "r3", "q0"
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);
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}
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#endif
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#ifdef HAS_MIRRORROWUV_NEON
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void MirrorRowUV_NEON(const uint8* src, uint8* dst_a, uint8* dst_b, int width) {
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asm volatile(
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// compute where to start writing destination
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"add %1, %3 \n" // dst_a + width
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"add %2, %3 \n" // dst_b + width
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// work on input segments that are multiples of 16, but
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// width that has been passed is output segments, half
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// the size of input.
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"lsrs r12, %3, #3 \n"
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"beq 2f \n"
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// the output is written in to two blocks.
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"mov r12, #-8 \n"
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// back of destination by the size of the register that is
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// going to be mirrord
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"sub %1, #8 \n"
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"sub %2, #8 \n"
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// the loop needs to run on blocks of 8. what will be left
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// over is either a negative number, the residuals that need
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// to be done, or 0. if this isn't subtracted off here the
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// loop will run one extra time.
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"sub %3, #8 \n"
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// mirror the bytes in the 64 bit segments
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"1: \n"
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"vld2.8 {d0, d1}, [%0]! \n" // src += 16
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"vrev64.8 q0, q0 \n"
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"vst1.8 {d0}, [%1], r12 \n" // dst_a -= 8
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"vst1.8 {d1}, [%2], r12 \n" // dst_b -= 8
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"subs %3, #8 \n"
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"bge 1b \n"
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// add 8 back to the counter. if the result is 0 there is no
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// residuals so return
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"adds %3, #8 \n"
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"beq 4f \n"
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"add %1, #8 \n"
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"add %2, #8 \n"
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"2: \n"
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"mov r12, #-1 \n"
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"sub %1, #1 \n"
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"sub %2, #1 \n"
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"3: \n"
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"vld2.8 {d0[0], d1[0]}, [%0]! \n" // src += 2
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"vst1.8 {d0[0]}, [%1], r12 \n" // dst_a -= 1
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"vst1.8 {d1[0]}, [%2], r12 \n" // dst_b -= 1
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"subs %3, %3, #1 \n"
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"bgt 3b \n"
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"4: \n"
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: "+r"(src), // %0
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"+r"(dst_a), // %1
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"+r"(dst_b), // %2
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"+r"(width) // %3
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:
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: "memory", "cc", "r12", "q0"
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);
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}
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#endif
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#endif // __ARM_NEON__
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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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