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https://chromium.googlesource.com/libyuv/libyuv
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755de365c4
Short syntax is not supported by all compilers. Review URL: http://webrtc-codereview.appspot.com/265001 git-svn-id: http://libyuv.googlecode.com/svn/trunk@60 16f28f9a-4ce2-e073-06de-1de4eb20be90
558 lines
16 KiB
C++
558 lines
16 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 "libyuv/basic_types.h"
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namespace libyuv {
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#if defined(__ARM_NEON__) && !defined(COVERAGE_ENABLED)
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void ReverseLine_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 reversed
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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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"1:\n"
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"vld1.8 {q0}, [%0]!\n" // src += 16
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// reverse the bytes in the 64 bit segments. unable to reverse
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// the bytes in the entire 128 bits in one go.
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"vrev64.8 q0, q0\n"
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// because of the inability to reverse the entire 128 bits
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// reverse the writing out of the two 64 bit segments.
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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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static const uint8 vtbl_4x4_transpose[16] __attribute__((vector_size(16))) =
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{ 0, 4, 8, 12, 1, 5, 9, 13, 2, 6, 10, 14, 3, 7, 11, 15 };
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void TransposeWx8_NEON(const uint8* src, int src_stride,
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uint8* dst, int dst_stride,
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int width) {
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asm volatile(
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// loops are on blocks of 8. loop will stop when
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// counter gets to or below 0. starting the counter
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// at w-8 allow for this
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"sub %4, #8\n"
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// handle 8x8 blocks. this should be the majority of the plane
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"1:\n"
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"mov r9, %0\n"
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"vld1.8 {d0}, [r9], %1\n"
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"vld1.8 {d1}, [r9], %1\n"
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"vld1.8 {d2}, [r9], %1\n"
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"vld1.8 {d3}, [r9], %1\n"
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"vld1.8 {d4}, [r9], %1\n"
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"vld1.8 {d5}, [r9], %1\n"
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"vld1.8 {d6}, [r9], %1\n"
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"vld1.8 {d7}, [r9]\n"
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"vtrn.8 d1, d0\n"
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"vtrn.8 d3, d2\n"
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"vtrn.8 d5, d4\n"
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"vtrn.8 d7, d6\n"
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"vtrn.16 d1, d3\n"
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"vtrn.16 d0, d2\n"
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"vtrn.16 d5, d7\n"
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"vtrn.16 d4, d6\n"
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"vtrn.32 d1, d5\n"
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"vtrn.32 d0, d4\n"
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"vtrn.32 d3, d7\n"
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"vtrn.32 d2, d6\n"
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"vrev16.8 q0, q0\n"
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"vrev16.8 q1, q1\n"
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"vrev16.8 q2, q2\n"
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"vrev16.8 q3, q3\n"
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"mov r9, %2\n"
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"vst1.8 {d1}, [r9], %3\n"
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"vst1.8 {d0}, [r9], %3\n"
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"vst1.8 {d3}, [r9], %3\n"
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"vst1.8 {d2}, [r9], %3\n"
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"vst1.8 {d5}, [r9], %3\n"
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"vst1.8 {d4}, [r9], %3\n"
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"vst1.8 {d7}, [r9], %3\n"
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"vst1.8 {d6}, [r9]\n"
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"add %0, #8\n" // src += 8
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"add %2, %2, %3, lsl #3\n" // dst += 8 * dst_stride
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"subs %4, #8\n" // w -= 8
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"bge 1b\n"
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// add 8 back to counter. if the result is 0 there are
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// no residuals.
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"adds %4, #8\n"
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"beq 4f\n"
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// some residual, so between 1 and 7 lines left to transpose
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"cmp %4, #2\n"
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"blt 3f\n"
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"cmp %4, #4\n"
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"blt 2f\n"
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// 4x8 block
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"mov r9, %0\n"
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"vld1.32 {d0[0]}, [r9], %1\n"
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"vld1.32 {d0[1]}, [r9], %1\n"
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"vld1.32 {d1[0]}, [r9], %1\n"
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"vld1.32 {d1[1]}, [r9], %1\n"
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"vld1.32 {d2[0]}, [r9], %1\n"
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"vld1.32 {d2[1]}, [r9], %1\n"
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"vld1.32 {d3[0]}, [r9], %1\n"
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"vld1.32 {d3[1]}, [r9]\n"
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"mov r9, %2\n"
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"vld1.8 {q3}, [%5]\n"
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"vtbl.8 d4, {d0, d1}, d6\n"
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"vtbl.8 d5, {d0, d1}, d7\n"
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"vtbl.8 d0, {d2, d3}, d6\n"
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"vtbl.8 d1, {d2, d3}, d7\n"
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// TODO: rework shuffle above to write
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// out with 4 instead of 8 writes
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"vst1.32 {d4[0]}, [r9], %3\n"
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"vst1.32 {d4[1]}, [r9], %3\n"
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"vst1.32 {d5[0]}, [r9], %3\n"
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"vst1.32 {d5[1]}, [r9]\n"
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"add r9, %2, #4\n"
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"vst1.32 {d0[0]}, [r9], %3\n"
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"vst1.32 {d0[1]}, [r9], %3\n"
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"vst1.32 {d1[0]}, [r9], %3\n"
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"vst1.32 {d1[1]}, [r9]\n"
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"add %0, #4\n" // src += 4
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"add %2, %2, %3, lsl #2\n" // dst += 4 * dst_stride
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"subs %4, #4\n" // w -= 4
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"beq 4f\n"
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// some residual, check to see if it includes a 2x8 block,
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// or less
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"cmp %4, #2\n"
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"blt 3f\n"
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// 2x8 block
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"2:\n"
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"mov r9, %0\n"
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"vld1.16 {d0[0]}, [r9], %1\n"
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"vld1.16 {d1[0]}, [r9], %1\n"
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"vld1.16 {d0[1]}, [r9], %1\n"
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"vld1.16 {d1[1]}, [r9], %1\n"
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"vld1.16 {d0[2]}, [r9], %1\n"
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"vld1.16 {d1[2]}, [r9], %1\n"
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"vld1.16 {d0[3]}, [r9], %1\n"
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"vld1.16 {d1[3]}, [r9]\n"
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"vtrn.8 d0, d1\n"
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"mov r9, %2\n"
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"vst1.64 {d0}, [r9], %3\n"
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"vst1.64 {d1}, [r9]\n"
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"add %0, #2\n" // src += 2
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"add %2, %2, %3, lsl #1\n" // dst += 2 * dst_stride
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"subs %4, #2\n" // w -= 2
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"beq 4f\n"
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// 1x8 block
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"3:\n"
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"vld1.8 {d0[0]}, [%0], %1\n"
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"vld1.8 {d0[1]}, [%0], %1\n"
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"vld1.8 {d0[2]}, [%0], %1\n"
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"vld1.8 {d0[3]}, [%0], %1\n"
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"vld1.8 {d0[4]}, [%0], %1\n"
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"vld1.8 {d0[5]}, [%0], %1\n"
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"vld1.8 {d0[6]}, [%0], %1\n"
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"vld1.8 {d0[7]}, [%0]\n"
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"vst1.64 {d0}, [%2]\n"
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"4:\n"
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: "+r"(src), // %0
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"+r"(src_stride), // %1
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"+r"(dst), // %2
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"+r"(dst_stride), // %3
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"+r"(width) // %4
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: "r"(vtbl_4x4_transpose) // %5
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: "memory", "cc", "r9", "q0", "q1", "q2", "q3"
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);
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}
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void ReverseLineUV_NEON(const uint8* src,
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uint8* dst_a, uint8* dst_b,
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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 reversed
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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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"1:\n"
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"vld2.8 {d0, d1}, [%0]!\n" // src += 16
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// reverse the bytes in the 64 bit segments
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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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static const uint8 vtbl_4x4_transpose_di[16] __attribute__((vector_size(16))) =
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{ 0, 8, 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14, 7, 15 };
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void TransposeUVWx8_NEON(const uint8* src, int src_stride,
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uint8* dst_a, int dst_stride_a,
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uint8* dst_b, int dst_stride_b,
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int width) {
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asm volatile(
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// loops are on blocks of 8. loop will stop when
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// counter gets to or below 0. starting the counter
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// at w-8 allow for this
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"sub %6, #8\n"
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// handle 8x8 blocks. this should be the majority of the plane
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"1:\n"
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"mov r9, %0\n"
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"vld2.8 {d0, d1}, [r9], %1\n"
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"vld2.8 {d2, d3}, [r9], %1\n"
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"vld2.8 {d4, d5}, [r9], %1\n"
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"vld2.8 {d6, d7}, [r9], %1\n"
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"vld2.8 {d16, d17}, [r9], %1\n"
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"vld2.8 {d18, d19}, [r9], %1\n"
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"vld2.8 {d20, d21}, [r9], %1\n"
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"vld2.8 {d22, d23}, [r9]\n"
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"vtrn.8 q1, q0\n"
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"vtrn.8 q3, q2\n"
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"vtrn.8 q9, q8\n"
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"vtrn.8 q11, q10\n"
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"vtrn.16 q1, q3\n"
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"vtrn.16 q0, q2\n"
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"vtrn.16 q9, q11\n"
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"vtrn.16 q8, q10\n"
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"vtrn.32 q1, q9\n"
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"vtrn.32 q0, q8\n"
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"vtrn.32 q3, q11\n"
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"vtrn.32 q2, q10\n"
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"vrev16.8 q0, q0\n"
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"vrev16.8 q1, q1\n"
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"vrev16.8 q2, q2\n"
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"vrev16.8 q3, q3\n"
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"vrev16.8 q8, q8\n"
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"vrev16.8 q9, q9\n"
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"vrev16.8 q10, q10\n"
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"vrev16.8 q11, q11\n"
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"mov r9, %2\n"
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"vst1.8 {d2}, [r9], %3\n"
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"vst1.8 {d0}, [r9], %3\n"
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"vst1.8 {d6}, [r9], %3\n"
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"vst1.8 {d4}, [r9], %3\n"
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"vst1.8 {d18}, [r9], %3\n"
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"vst1.8 {d16}, [r9], %3\n"
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"vst1.8 {d22}, [r9], %3\n"
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"vst1.8 {d20}, [r9]\n"
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"mov r9, %4\n"
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"vst1.8 {d3}, [r9], %5\n"
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"vst1.8 {d1}, [r9], %5\n"
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"vst1.8 {d7}, [r9], %5\n"
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"vst1.8 {d5}, [r9], %5\n"
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"vst1.8 {d19}, [r9], %5\n"
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"vst1.8 {d17}, [r9], %5\n"
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"vst1.8 {d23}, [r9], %5\n"
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"vst1.8 {d21}, [r9]\n"
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"add %0, #8*2\n" // src += 8*2
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"add %2, %2, %3, lsl #3\n" // dst_a += 8 * dst_stride_a
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"add %4, %4, %5, lsl #3\n" // dst_b += 8 * dst_stride_b
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"subs %6, #8\n" // w -= 8
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"bge 1b\n"
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// add 8 back to counter. if the result is 0 there are
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// no residuals.
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"adds %6, #8\n"
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"beq 4f\n"
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// some residual, so between 1 and 7 lines left to transpose
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"cmp %6, #2\n"
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"blt 3f\n"
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"cmp %6, #4\n"
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"blt 2f\n"
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//TODO(frkoenig) : clean this up
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// 4x8 block
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"mov r9, %0\n"
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"vld1.64 {d0}, [r9], %1\n"
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"vld1.64 {d1}, [r9], %1\n"
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"vld1.64 {d2}, [r9], %1\n"
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"vld1.64 {d3}, [r9], %1\n"
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"vld1.64 {d4}, [r9], %1\n"
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"vld1.64 {d5}, [r9], %1\n"
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"vld1.64 {d6}, [r9], %1\n"
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"vld1.64 {d7}, [r9]\n"
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"vld1.8 {q15}, [%7]\n"
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"vtrn.8 q0, q1\n"
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"vtrn.8 q2, q3\n"
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"vtbl.8 d16, {d0, d1}, d30\n"
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"vtbl.8 d17, {d0, d1}, d31\n"
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"vtbl.8 d18, {d2, d3}, d30\n"
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"vtbl.8 d19, {d2, d3}, d31\n"
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"vtbl.8 d20, {d4, d5}, d30\n"
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"vtbl.8 d21, {d4, d5}, d31\n"
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"vtbl.8 d22, {d6, d7}, d30\n"
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"vtbl.8 d23, {d6, d7}, d31\n"
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"mov r9, %2\n"
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"vst1.32 {d16[0]}, [r9], %3\n"
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"vst1.32 {d16[1]}, [r9], %3\n"
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"vst1.32 {d17[0]}, [r9], %3\n"
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"vst1.32 {d17[1]}, [r9], %3\n"
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|
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"add r9, %2, #4\n"
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"vst1.32 {d20[0]}, [r9], %3\n"
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"vst1.32 {d20[1]}, [r9], %3\n"
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"vst1.32 {d21[0]}, [r9], %3\n"
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"vst1.32 {d21[1]}, [r9]\n"
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|
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"mov r9, %4\n"
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|
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"vst1.32 {d18[0]}, [r9], %5\n"
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"vst1.32 {d18[1]}, [r9], %5\n"
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"vst1.32 {d19[0]}, [r9], %5\n"
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"vst1.32 {d19[1]}, [r9], %5\n"
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|
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"add r9, %4, #4\n"
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"vst1.32 {d22[0]}, [r9], %5\n"
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"vst1.32 {d22[1]}, [r9], %5\n"
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"vst1.32 {d23[0]}, [r9], %5\n"
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"vst1.32 {d23[1]}, [r9]\n"
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|
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"add %0, #4*2\n" // src += 4 * 2
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"add %2, %2, %3, lsl #2\n" // dst_a += 4 * dst_stride_a
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"add %4, %4, %5, lsl #2\n" // dst_b += 4 * dst_stride_b
|
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"subs %6, #4\n" // w -= 4
|
|
"beq 4f\n"
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|
|
|
// some residual, check to see if it includes a 2x8 block,
|
|
// or less
|
|
"cmp %6, #2\n"
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"blt 3f\n"
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|
|
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// 2x8 block
|
|
"2:\n"
|
|
"mov r9, %0\n"
|
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"vld2.16 {d0[0], d2[0]}, [r9], %1\n"
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"vld2.16 {d1[0], d3[0]}, [r9], %1\n"
|
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"vld2.16 {d0[1], d2[1]}, [r9], %1\n"
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|
"vld2.16 {d1[1], d3[1]}, [r9], %1\n"
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"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"
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|
|
|
"vtrn.8 d0, d1\n"
|
|
"vtrn.8 d2, d3\n"
|
|
|
|
"mov r9, %2\n"
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|
|
|
"vst1.64 {d0}, [r9], %3\n"
|
|
"vst1.64 {d2}, [r9]\n"
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|
|
|
"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"(vtbl_4x4_transpose_di)// %7
|
|
: "memory", "cc", "r9",
|
|
"q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11"
|
|
);
|
|
}
|
|
#endif
|
|
}
|