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b5491759b4
BUG=none TEST=./libyuv_unittest --gtest_filter=*ARGBScale* Review URL: https://webrtc-codereview.appspot.com/964017 git-svn-id: http://libyuv.googlecode.com/svn/trunk@497 16f28f9a-4ce2-e073-06de-1de4eb20be90
229 lines
9.6 KiB
C++
229 lines
9.6 KiB
C++
/*
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* Copyright 2012 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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#include "libyuv/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(YUV_DISABLE_ASM) && defined(__ARM_NEON__)
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void ScaleARGBRowDown2_NEON(const uint8* src_ptr, ptrdiff_t /* src_stride */,
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uint8* dst, int dst_width) {
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asm volatile (
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"1: \n"
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// load even pixels into q0, odd into q1
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"vld2.u32 {q0, q1}, [%0]! \n"
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"vld2.u32 {q2, q3}, [%0]! \n"
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"subs %2, %2, #8 \n" // 8 processed per loop
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"vst1.u8 {q0}, [%1]! \n" // store even pixels
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"vst1.u8 {q2}, [%1]! \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(dst), // %1
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"+r"(dst_width) // %2
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:
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: "memory", "cc", "q0", "q1", "q2", "q3" // Clobber List
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);
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}
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void ScaleARGBRowDown2Int_NEON(const uint8* src_ptr, ptrdiff_t src_stride,
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uint8* dst, int dst_width) {
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asm volatile (
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// change the stride to row 2 pointer
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"add %1, %0 \n"
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"1: \n"
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"vld4.8 {d0, d2, d4, d6}, [%0]! \n" // load 8 ARGB pixels.
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"vld4.8 {d1, d3, d5, d7}, [%0]! \n" // load next 8 ARGB pixels.
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"subs %3, %3, #8 \n" // 8 processed per loop.
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"vpaddl.u8 q0, q0 \n" // B 16 bytes -> 8 shorts.
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"vpaddl.u8 q1, q1 \n" // G 16 bytes -> 8 shorts.
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"vpaddl.u8 q2, q2 \n" // R 16 bytes -> 8 shorts.
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"vpaddl.u8 q3, q3 \n" // A 16 bytes -> 8 shorts.
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"vld4.8 {d16, d18, d20, d22}, [%1]! \n" // load 8 more ARGB pixels.
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"vld4.8 {d17, d19, d21, d23}, [%1]! \n" // load last 8 ARGB pixels.
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"vpadal.u8 q0, q8 \n" // B 16 bytes -> 8 shorts.
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"vpadal.u8 q1, q9 \n" // G 16 bytes -> 8 shorts.
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"vpadal.u8 q2, q10 \n" // R 16 bytes -> 8 shorts.
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"vpadal.u8 q3, q11 \n" // A 16 bytes -> 8 shorts.
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"vrshrn.u16 d0, q0, #2 \n" // downshift, round and pack
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"vrshrn.u16 d1, q1, #2 \n"
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"vrshrn.u16 d2, q2, #2 \n"
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"vrshrn.u16 d3, q3, #2 \n"
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"vst4.u8 {d0, d1, d2, d3}, [%2]! \n"
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"bgt 1b \n"
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: "+r"(src_ptr), // %0
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"+r"(src_stride), // %1
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"+r"(dst), // %2
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"+r"(dst_width) // %3
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:
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: "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11"
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);
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}
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// Reads 4 pixels at a time.
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// Alignment requirement: src_argb 4 byte aligned.
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void ScaleARGBRowDownEven_NEON(const uint8* src_argb, ptrdiff_t,
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int src_stepx,
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uint8* dst_argb, int dst_width) {
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asm volatile (
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"mov r12, %3, lsl #2 \n"
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".p2align 2 \n"
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"1: \n"
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"vld1.32 {d0[0]}, [%0], r12 \n"
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"vld1.32 {d0[1]}, [%0], r12 \n"
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"vld1.32 {d1[0]}, [%0], r12 \n"
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"vld1.32 {d1[1]}, [%0], r12 \n"
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"subs %2, #4 \n" // 4 pixels per loop.
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"vst1.8 {q0}, [%1]! \n"
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"bgt 1b \n"
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: "+r"(src_argb), // %0
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"+r"(dst_argb), // %1
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"+r"(dst_width) // %2
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: "r"(src_stepx) // %3
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: "memory", "cc", "r12", "q0"
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);
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}
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// Reads 4 pixels at a time.
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// Alignment requirement: src_argb 4 byte aligned.
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void ScaleARGBRowDownEvenInt_NEON(const uint8* src_argb, ptrdiff_t src_stride,
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int src_stepx,
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uint8* dst_argb, int dst_width) {
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asm volatile (
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"mov r12, %4, lsl #2 \n"
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"add %1, %0 \n"
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".p2align 2 \n"
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"1: \n"
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"vld1.8 {d0}, [%0], r12 \n" // Read 4 2x2 blocks -> 2x1
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"vld1.8 {d1}, [%1], r12 \n"
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"vld1.8 {d2}, [%0], r12 \n"
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"vld1.8 {d3}, [%1], r12 \n"
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"vld1.8 {d4}, [%0], r12 \n"
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"vld1.8 {d5}, [%1], r12 \n"
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"vld1.8 {d6}, [%0], r12 \n"
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"vld1.8 {d7}, [%1], r12 \n"
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"vaddl.u8 q0, d0, d1 \n"
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"vaddl.u8 q1, d2, d3 \n"
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"vaddl.u8 q2, d4, d5 \n"
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"vaddl.u8 q3, d6, d7 \n"
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"vswp.8 d1, d2 \n" // ab_cd -> ac_bd
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"vswp.8 d5, d6 \n" // ef_gh -> eg_fh
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"vadd.u16 q0, q0, q1 \n" // (a+b)_(c+d)
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"vadd.u16 q2, q2, q3 \n" // (e+f)_(g+h)
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"vrshrn.u16 d0, q0, #2 \n" // first 2 pixels.
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"vrshrn.u16 d1, q2, #2 \n" // next 2 pixels.
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"subs %3, #4 \n" // 4 pixels per loop.
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"vst1.8 {q0}, [%2]! \n"
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"bgt 1b \n"
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: "+r"(src_argb), // %0
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"+r"(src_stride), // %1
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"+r"(dst_argb), // %2
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"+r"(dst_width) // %3
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: "r"(src_stepx) // %4
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: "memory", "cc", "r12", "q0", "q1", "q2", "q3"
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);
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}
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// 4x2 -> 4x1
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void ScaleARGBFilterRows_NEON(uint8* dst_ptr,
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const uint8* src_ptr, ptrdiff_t src_stride,
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int dst_width, int source_y_fraction) {
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asm volatile (
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"cmp %4, #0 \n"
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"beq 100f \n"
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"add %2, %1 \n"
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"cmp %4, #64 \n"
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"beq 75f \n"
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"cmp %4, #128 \n"
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"beq 50f \n"
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"cmp %4, #192 \n"
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"beq 25f \n"
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"vdup.8 d5, %4 \n"
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"rsb %4, #256 \n"
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"vdup.8 d4, %4 \n"
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// General purpose row blend.
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"1: \n"
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"vld1.u8 {q0}, [%1]! \n"
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"vld1.u8 {q1}, [%2]! \n"
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"subs %3, #4 \n"
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"vmull.u8 q13, d0, d4 \n"
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"vmull.u8 q14, d1, d4 \n"
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"vmlal.u8 q13, d2, d5 \n"
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"vmlal.u8 q14, d3, d5 \n"
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"vrshrn.u16 d0, q13, #8 \n"
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"vrshrn.u16 d1, q14, #8 \n"
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"vst1.u8 {q0}, [%0]! \n"
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"bgt 1b \n"
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"b 99f \n"
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// Blend 25 / 75.
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"25: \n"
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"vld1.u8 {q0}, [%1]! \n"
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"vld1.u8 {q1}, [%2]! \n"
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"subs %3, #4 \n"
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"vrhadd.u8 q0, q1 \n"
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"vrhadd.u8 q0, q1 \n"
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"vst1.u8 {q0}, [%0]! \n"
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"bgt 25b \n"
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"b 99f \n"
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// Blend 50 / 50.
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"50: \n"
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"vld1.u8 {q0}, [%1]! \n"
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"vld1.u8 {q1}, [%2]! \n"
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"subs %3, #4 \n"
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"vrhadd.u8 q0, q1 \n"
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"vst1.u8 {q0}, [%0]! \n"
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"bgt 50b \n"
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"b 99f \n"
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// Blend 75 / 25.
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"75: \n"
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"vld1.u8 {q1}, [%1]! \n"
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"vld1.u8 {q0}, [%2]! \n"
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"subs %3, #4 \n"
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"vrhadd.u8 q0, q1 \n"
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"vrhadd.u8 q0, q1 \n"
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"vst1.u8 {q0}, [%0]! \n"
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"bgt 75b \n"
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"b 99f \n"
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// Blend 100 / 0 - Copy row unchanged.
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"100: \n"
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"vld1.u8 {q0}, [%1]! \n"
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"subs %3, #4 \n"
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"vst1.u8 {q0}, [%0]! \n"
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"bgt 100b \n"
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"99: \n"
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"vst1.u32 {d1[1]}, [%0] \n"
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: "+r"(dst_ptr), // %0
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"+r"(src_ptr), // %1
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"+r"(src_stride), // %2
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"+r"(dst_width), // %3
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"+r"(source_y_fraction) // %4
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:
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: "q0", "q1", "d4", "d5", "q13", "q14", "memory", "cc"
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);
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}
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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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