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pjsip-pjproject/third_party/yuv/source/row_neon64.cc

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/*
* Copyright 2014 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"
#ifdef __cplusplus
namespace libyuv {
extern "C" {
#endif
// This module is for GCC Neon armv8 64 bit.
#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
// Read 8 Y, 4 U and 4 V from 422
#define READYUV422 \
"ld1 {v0.8b}, [%0], #8 \n" \
"ld1 {v1.s}[0], [%1], #4 \n" \
"ld1 {v1.s}[1], [%2], #4 \n"
// Read 8 Y, 8 U and 8 V from 444
#define READYUV444 \
"ld1 {v0.8b}, [%0], #8 \n" \
"ld1 {v1.d}[0], [%1], #8 \n" \
"ld1 {v1.d}[1], [%2], #8 \n" \
"uaddlp v1.8h, v1.16b \n" \
"rshrn v1.8b, v1.8h, #1 \n"
// Read 8 Y, and set 4 U and 4 V to 128
#define READYUV400 \
"ld1 {v0.8b}, [%0], #8 \n" \
"movi v1.8b , #128 \n"
// Read 8 Y and 4 UV from NV12
#define READNV12 \
"ld1 {v0.8b}, [%0], #8 \n" \
"ld1 {v2.8b}, [%1], #8 \n" \
"uzp1 v1.8b, v2.8b, v2.8b \n" \
"uzp2 v3.8b, v2.8b, v2.8b \n" \
"ins v1.s[1], v3.s[0] \n"
// Read 8 Y and 4 VU from NV21
#define READNV21 \
"ld1 {v0.8b}, [%0], #8 \n" \
"ld1 {v2.8b}, [%1], #8 \n" \
"uzp1 v3.8b, v2.8b, v2.8b \n" \
"uzp2 v1.8b, v2.8b, v2.8b \n" \
"ins v1.s[1], v3.s[0] \n"
// Read 8 YUY2
#define READYUY2 \
"ld2 {v0.8b, v1.8b}, [%0], #16 \n" \
"uzp2 v3.8b, v1.8b, v1.8b \n" \
"uzp1 v1.8b, v1.8b, v1.8b \n" \
"ins v1.s[1], v3.s[0] \n"
// Read 8 UYVY
#define READUYVY \
"ld2 {v2.8b, v3.8b}, [%0], #16 \n" \
"orr v0.8b, v3.8b, v3.8b \n" \
"uzp1 v1.8b, v2.8b, v2.8b \n" \
"uzp2 v3.8b, v2.8b, v2.8b \n" \
"ins v1.s[1], v3.s[0] \n"
#define YUVTORGB_SETUP \
"ld1r {v24.8h}, [%[kUVBiasBGR]], #2 \n" \
"ld1r {v25.8h}, [%[kUVBiasBGR]], #2 \n" \
"ld1r {v26.8h}, [%[kUVBiasBGR]] \n" \
"ld1r {v31.4s}, [%[kYToRgb]] \n" \
"ld2 {v27.8h, v28.8h}, [%[kUVToRB]] \n" \
"ld2 {v29.8h, v30.8h}, [%[kUVToG]] \n"
#define YUVTORGB(vR, vG, vB) \
"uxtl v0.8h, v0.8b \n" /* Extract Y */ \
"shll v2.8h, v1.8b, #8 \n" /* Replicate UV */ \
"ushll2 v3.4s, v0.8h, #0 \n" /* Y */ \
"ushll v0.4s, v0.4h, #0 \n" \
"mul v3.4s, v3.4s, v31.4s \n" \
"mul v0.4s, v0.4s, v31.4s \n" \
"sqshrun v0.4h, v0.4s, #16 \n" \
"sqshrun2 v0.8h, v3.4s, #16 \n" /* Y */ \
"uaddw v1.8h, v2.8h, v1.8b \n" /* Replicate UV */ \
"mov v2.d[0], v1.d[1] \n" /* Extract V */ \
"uxtl v2.8h, v2.8b \n" \
"uxtl v1.8h, v1.8b \n" /* Extract U */ \
"mul v3.8h, v1.8h, v27.8h \n" \
"mul v5.8h, v1.8h, v29.8h \n" \
"mul v6.8h, v2.8h, v30.8h \n" \
"mul v7.8h, v2.8h, v28.8h \n" \
"sqadd v6.8h, v6.8h, v5.8h \n" \
"sqadd " #vB \
".8h, v24.8h, v0.8h \n" /* B */ \
"sqadd " #vG \
".8h, v25.8h, v0.8h \n" /* G */ \
"sqadd " #vR \
".8h, v26.8h, v0.8h \n" /* R */ \
"sqadd " #vB ".8h, " #vB \
".8h, v3.8h \n" /* B */ \
"sqsub " #vG ".8h, " #vG \
".8h, v6.8h \n" /* G */ \
"sqadd " #vR ".8h, " #vR \
".8h, v7.8h \n" /* R */ \
"sqshrun " #vB ".8b, " #vB \
".8h, #6 \n" /* B */ \
"sqshrun " #vG ".8b, " #vG \
".8h, #6 \n" /* G */ \
"sqshrun " #vR ".8b, " #vR ".8h, #6 \n" /* R */
void I444ToARGBRow_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n" /* A */
"1: \n"
READYUV444
YUVTORGB(v22, v21, v20)
"subs %w4, %w4, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%3], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_argb), // %3
"+r"(width) // %4
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void I422ToARGBRow_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n" /* A */
"1: \n"
READYUV422
YUVTORGB(v22, v21, v20)
"subs %w4, %w4, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%3], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_argb), // %3
"+r"(width) // %4
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void I422AlphaToARGBRow_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
const uint8* src_a,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"1: \n"
READYUV422
YUVTORGB(v22, v21, v20)
"ld1 {v23.8b}, [%3], #8 \n"
"subs %w5, %w5, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%4], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(src_a), // %3
"+r"(dst_argb), // %4
"+r"(width) // %5
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void I422ToRGBARow_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_rgba,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v20.8b, #255 \n" /* A */
"1: \n"
READYUV422
YUVTORGB(v23, v22, v21)
"subs %w4, %w4, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%3], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_rgba), // %3
"+r"(width) // %4
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void I422ToRGB24Row_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_rgb24,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"1: \n"
READYUV422
YUVTORGB(v22, v21, v20)
"subs %w4, %w4, #8 \n"
"st3 {v20.8b,v21.8b,v22.8b}, [%3], #24 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_rgb24), // %3
"+r"(width) // %4
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
#define ARGBTORGB565 \
"shll v0.8h, v22.8b, #8 \n" /* R */ \
"shll v21.8h, v21.8b, #8 \n" /* G */ \
"shll v20.8h, v20.8b, #8 \n" /* B */ \
"sri v0.8h, v21.8h, #5 \n" /* RG */ \
"sri v0.8h, v20.8h, #11 \n" /* RGB */
void I422ToRGB565Row_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_rgb565,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile(
YUVTORGB_SETUP
"1: \n" READYUV422 YUVTORGB(
v22, v21,
v20) "subs %w4, %w4, #8 \n" ARGBTORGB565
"st1 {v0.8h}, [%3], #16 \n" // store 8 pixels
// RGB565.
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_rgb565), // %3
"+r"(width) // %4
: [kUVToRB] "r"(&yuvconstants->kUVToRB),
[kUVToG] "r"(&yuvconstants->kUVToG),
[kUVBiasBGR] "r"(&yuvconstants->kUVBiasBGR),
[kYToRgb] "r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30");
}
#define ARGBTOARGB1555 \
"shll v0.8h, v23.8b, #8 \n" /* A */ \
"shll v22.8h, v22.8b, #8 \n" /* R */ \
"shll v21.8h, v21.8b, #8 \n" /* G */ \
"shll v20.8h, v20.8b, #8 \n" /* B */ \
"sri v0.8h, v22.8h, #1 \n" /* AR */ \
"sri v0.8h, v21.8h, #6 \n" /* ARG */ \
"sri v0.8h, v20.8h, #11 \n" /* ARGB */
void I422ToARGB1555Row_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_argb1555,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile(
YUVTORGB_SETUP
"movi v23.8b, #255 \n"
"1: \n" READYUV422 YUVTORGB(
v22, v21,
v20) "subs %w4, %w4, #8 \n" ARGBTOARGB1555
"st1 {v0.8h}, [%3], #16 \n" // store 8 pixels
// RGB565.
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_argb1555), // %3
"+r"(width) // %4
: [kUVToRB] "r"(&yuvconstants->kUVToRB),
[kUVToG] "r"(&yuvconstants->kUVToG),
[kUVBiasBGR] "r"(&yuvconstants->kUVBiasBGR),
[kYToRgb] "r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30");
}
#define ARGBTOARGB4444 \
/* Input v20.8b<=B, v21.8b<=G, v22.8b<=R, v23.8b<=A, v4.8b<=0x0f */ \
"ushr v20.8b, v20.8b, #4 \n" /* B */ \
"bic v21.8b, v21.8b, v4.8b \n" /* G */ \
"ushr v22.8b, v22.8b, #4 \n" /* R */ \
"bic v23.8b, v23.8b, v4.8b \n" /* A */ \
"orr v0.8b, v20.8b, v21.8b \n" /* BG */ \
"orr v1.8b, v22.8b, v23.8b \n" /* RA */ \
"zip1 v0.16b, v0.16b, v1.16b \n" /* BGRA */
void I422ToARGB4444Row_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_argb4444,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v4.16b, #0x0f \n" // bits to clear with vbic.
"1: \n"
READYUV422
YUVTORGB(v22, v21, v20)
"subs %w4, %w4, #8 \n"
"movi v23.8b, #255 \n"
ARGBTOARGB4444
"st1 {v0.8h}, [%3], #16 \n" // store 8 pixels ARGB4444.
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_argb4444), // %3
"+r"(width) // %4
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void I400ToARGBRow_NEON(const uint8* src_y, uint8* dst_argb, int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n"
"1: \n"
READYUV400
YUVTORGB(v22, v21, v20)
"subs %w2, %w2, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%1], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
: [kUVToRB]"r"(&kYuvI601Constants.kUVToRB),
[kUVToG]"r"(&kYuvI601Constants.kUVToG),
[kUVBiasBGR]"r"(&kYuvI601Constants.kUVBiasBGR),
[kYToRgb]"r"(&kYuvI601Constants.kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void J400ToARGBRow_NEON(const uint8* src_y, uint8* dst_argb, int width) {
asm volatile(
"movi v23.8b, #255 \n"
"1: \n"
"ld1 {v20.8b}, [%0], #8 \n"
"orr v21.8b, v20.8b, v20.8b \n"
"orr v22.8b, v20.8b, v20.8b \n"
"subs %w2, %w2, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%1], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v20", "v21", "v22", "v23");
}
void NV12ToARGBRow_NEON(const uint8* src_y,
const uint8* src_uv,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n"
"1: \n"
READNV12
YUVTORGB(v22, v21, v20)
"subs %w3, %w3, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%2], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_uv), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void NV21ToARGBRow_NEON(const uint8* src_y,
const uint8* src_vu,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n"
"1: \n"
READNV21
YUVTORGB(v22, v21, v20)
"subs %w3, %w3, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%2], #32 \n"
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_vu), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void NV12ToRGB565Row_NEON(const uint8* src_y,
const uint8* src_uv,
uint8* dst_rgb565,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile(
YUVTORGB_SETUP
"1: \n" READNV12 YUVTORGB(
v22, v21,
v20) "subs %w3, %w3, #8 \n" ARGBTORGB565
"st1 {v0.8h}, [%2], 16 \n" // store 8 pixels
// RGB565.
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_uv), // %1
"+r"(dst_rgb565), // %2
"+r"(width) // %3
: [kUVToRB] "r"(&yuvconstants->kUVToRB),
[kUVToG] "r"(&yuvconstants->kUVToG),
[kUVBiasBGR] "r"(&yuvconstants->kUVBiasBGR),
[kYToRgb] "r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30");
}
void YUY2ToARGBRow_NEON(const uint8* src_yuy2,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n"
"1: \n"
READYUY2
YUVTORGB(v22, v21, v20)
"subs %w2, %w2, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%1], #32 \n"
"b.gt 1b \n"
: "+r"(src_yuy2), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
void UYVYToARGBRow_NEON(const uint8* src_uyvy,
uint8* dst_argb,
const struct YuvConstants* yuvconstants,
int width) {
asm volatile (
YUVTORGB_SETUP
"movi v23.8b, #255 \n"
"1: \n"
READUYVY
YUVTORGB(v22, v21, v20)
"subs %w2, %w2, #8 \n"
"st4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%1], 32 \n"
"b.gt 1b \n"
: "+r"(src_uyvy), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
: [kUVToRB]"r"(&yuvconstants->kUVToRB),
[kUVToG]"r"(&yuvconstants->kUVToG),
[kUVBiasBGR]"r"(&yuvconstants->kUVBiasBGR),
[kYToRgb]"r"(&yuvconstants->kYToRgb)
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v23", "v24", "v25", "v26", "v27", "v28", "v29", "v30"
);
}
// Reads 16 pairs of UV and write even values to dst_u and odd to dst_v.
void SplitUVRow_NEON(const uint8* src_uv,
uint8* dst_u,
uint8* dst_v,
int width) {
asm volatile(
"1: \n"
"ld2 {v0.16b,v1.16b}, [%0], #32 \n" // load 16 pairs of UV
"subs %w3, %w3, #16 \n" // 16 processed per loop
"st1 {v0.16b}, [%1], #16 \n" // store U
"st1 {v1.16b}, [%2], #16 \n" // store V
"b.gt 1b \n"
: "+r"(src_uv), // %0
"+r"(dst_u), // %1
"+r"(dst_v), // %2
"+r"(width) // %3 // Output registers
: // Input registers
: "cc", "memory", "v0", "v1" // Clobber List
);
}
// Reads 16 U's and V's and writes out 16 pairs of UV.
void MergeUVRow_NEON(const uint8* src_u,
const uint8* src_v,
uint8* dst_uv,
int width) {
asm volatile(
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load U
"ld1 {v1.16b}, [%1], #16 \n" // load V
"subs %w3, %w3, #16 \n" // 16 processed per loop
"st2 {v0.16b,v1.16b}, [%2], #32 \n" // store 16 pairs of UV
"b.gt 1b \n"
: "+r"(src_u), // %0
"+r"(src_v), // %1
"+r"(dst_uv), // %2
"+r"(width) // %3 // Output registers
: // Input registers
: "cc", "memory", "v0", "v1" // Clobber List
);
}
// Reads 16 packed RGB and write to planar dst_r, dst_g, dst_b.
void SplitRGBRow_NEON(const uint8* src_rgb,
uint8* dst_r,
uint8* dst_g,
uint8* dst_b,
int width) {
asm volatile(
"1: \n"
"ld3 {v0.16b,v1.16b,v2.16b}, [%0], #48 \n" // load 16 RGB
"subs %w4, %w4, #16 \n" // 16 processed per loop
"st1 {v0.16b}, [%1], #16 \n" // store R
"st1 {v1.16b}, [%2], #16 \n" // store G
"st1 {v2.16b}, [%3], #16 \n" // store B
"b.gt 1b \n"
: "+r"(src_rgb), // %0
"+r"(dst_r), // %1
"+r"(dst_g), // %2
"+r"(dst_b), // %3
"+r"(width) // %4
: // Input registers
: "cc", "memory", "v0", "v1", "v2" // Clobber List
);
}
// Reads 16 planar R's, G's and B's and writes out 16 packed RGB at a time
void MergeRGBRow_NEON(const uint8* src_r,
const uint8* src_g,
const uint8* src_b,
uint8* dst_rgb,
int width) {
asm volatile(
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load R
"ld1 {v1.16b}, [%1], #16 \n" // load G
"ld1 {v2.16b}, [%2], #16 \n" // load B
"subs %w4, %w4, #16 \n" // 16 processed per loop
"st3 {v0.16b,v1.16b,v2.16b}, [%3], #48 \n" // store 16 RGB
"b.gt 1b \n"
: "+r"(src_r), // %0
"+r"(src_g), // %1
"+r"(src_b), // %2
"+r"(dst_rgb), // %3
"+r"(width) // %4
: // Input registers
: "cc", "memory", "v0", "v1", "v2" // Clobber List
);
}
// Copy multiple of 32.
void CopyRow_NEON(const uint8* src, uint8* dst, int count) {
asm volatile(
"1: \n"
"ldp q0, q1, [%0], #32 \n"
"subs %w2, %w2, #32 \n" // 32 processed per loop
"stp q0, q1, [%1], #32 \n"
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(count) // %2 // Output registers
: // Input registers
: "cc", "memory", "v0", "v1" // Clobber List
);
}
// SetRow writes 'count' bytes using an 8 bit value repeated.
void SetRow_NEON(uint8* dst, uint8 v8, int count) {
asm volatile(
"dup v0.16b, %w2 \n" // duplicate 16 bytes
"1: \n"
"subs %w1, %w1, #16 \n" // 16 bytes per loop
"st1 {v0.16b}, [%0], #16 \n" // store
"b.gt 1b \n"
: "+r"(dst), // %0
"+r"(count) // %1
: "r"(v8) // %2
: "cc", "memory", "v0");
}
void ARGBSetRow_NEON(uint8* dst, uint32 v32, int count) {
asm volatile(
"dup v0.4s, %w2 \n" // duplicate 4 ints
"1: \n"
"subs %w1, %w1, #4 \n" // 4 ints per loop
"st1 {v0.16b}, [%0], #16 \n" // store
"b.gt 1b \n"
: "+r"(dst), // %0
"+r"(count) // %1
: "r"(v32) // %2
: "cc", "memory", "v0");
}
void MirrorRow_NEON(const uint8* src, uint8* dst, int width) {
asm volatile(
// Start at end of source row.
"add %0, %0, %w2, sxtw \n"
"sub %0, %0, #16 \n"
"1: \n"
"ld1 {v0.16b}, [%0], %3 \n" // src -= 16
"subs %w2, %w2, #16 \n" // 16 pixels per loop.
"rev64 v0.16b, v0.16b \n"
"st1 {v0.D}[1], [%1], #8 \n" // dst += 16
"st1 {v0.D}[0], [%1], #8 \n"
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width) // %2
: "r"((ptrdiff_t)-16) // %3
: "cc", "memory", "v0");
}
void MirrorUVRow_NEON(const uint8* src_uv,
uint8* dst_u,
uint8* dst_v,
int width) {
asm volatile(
// Start at end of source row.
"add %0, %0, %w3, sxtw #1 \n"
"sub %0, %0, #16 \n"
"1: \n"
"ld2 {v0.8b, v1.8b}, [%0], %4 \n" // src -= 16
"subs %w3, %w3, #8 \n" // 8 pixels per loop.
"rev64 v0.8b, v0.8b \n"
"rev64 v1.8b, v1.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // dst += 8
"st1 {v1.8b}, [%2], #8 \n"
"b.gt 1b \n"
: "+r"(src_uv), // %0
"+r"(dst_u), // %1
"+r"(dst_v), // %2
"+r"(width) // %3
: "r"((ptrdiff_t)-16) // %4
: "cc", "memory", "v0", "v1");
}
void ARGBMirrorRow_NEON(const uint8* src, uint8* dst, int width) {
asm volatile(
// Start at end of source row.
"add %0, %0, %w2, sxtw #2 \n"
"sub %0, %0, #16 \n"
"1: \n"
"ld1 {v0.16b}, [%0], %3 \n" // src -= 16
"subs %w2, %w2, #4 \n" // 4 pixels per loop.
"rev64 v0.4s, v0.4s \n"
"st1 {v0.D}[1], [%1], #8 \n" // dst += 16
"st1 {v0.D}[0], [%1], #8 \n"
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width) // %2
: "r"((ptrdiff_t)-16) // %3
: "cc", "memory", "v0");
}
void RGB24ToARGBRow_NEON(const uint8* src_rgb24, uint8* dst_argb, int width) {
asm volatile(
"movi v4.8b, #255 \n" // Alpha
"1: \n"
"ld3 {v1.8b,v2.8b,v3.8b}, [%0], #24 \n" // load 8 pixels of RGB24.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"st4 {v1.8b,v2.8b,v3.8b,v4.8b}, [%1], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_rgb24), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v1", "v2", "v3", "v4" // Clobber List
);
}
void RAWToARGBRow_NEON(const uint8* src_raw, uint8* dst_argb, int width) {
asm volatile(
"movi v5.8b, #255 \n" // Alpha
"1: \n"
"ld3 {v0.8b,v1.8b,v2.8b}, [%0], #24 \n" // read r g b
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"orr v3.8b, v1.8b, v1.8b \n" // move g
"orr v4.8b, v0.8b, v0.8b \n" // move r
"st4 {v2.8b,v3.8b,v4.8b,v5.8b}, [%1], #32 \n" // store b g r a
"b.gt 1b \n"
: "+r"(src_raw), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5" // Clobber List
);
}
void RAWToRGB24Row_NEON(const uint8* src_raw, uint8* dst_rgb24, int width) {
asm volatile(
"1: \n"
"ld3 {v0.8b,v1.8b,v2.8b}, [%0], #24 \n" // read r g b
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"orr v3.8b, v1.8b, v1.8b \n" // move g
"orr v4.8b, v0.8b, v0.8b \n" // move r
"st3 {v2.8b,v3.8b,v4.8b}, [%1], #24 \n" // store b g r
"b.gt 1b \n"
: "+r"(src_raw), // %0
"+r"(dst_rgb24), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4" // Clobber List
);
}
#define RGB565TOARGB \
"shrn v6.8b, v0.8h, #5 \n" /* G xxGGGGGG */ \
"shl v6.8b, v6.8b, #2 \n" /* G GGGGGG00 upper 6 */ \
"ushr v4.8b, v6.8b, #6 \n" /* G 000000GG lower 2 */ \
"orr v1.8b, v4.8b, v6.8b \n" /* G */ \
"xtn v2.8b, v0.8h \n" /* B xxxBBBBB */ \
"ushr v0.8h, v0.8h, #11 \n" /* R 000RRRRR */ \
"xtn2 v2.16b,v0.8h \n" /* R in upper part */ \
"shl v2.16b, v2.16b, #3 \n" /* R,B BBBBB000 upper 5 */ \
"ushr v0.16b, v2.16b, #5 \n" /* R,B 00000BBB lower 3 */ \
"orr v0.16b, v0.16b, v2.16b \n" /* R,B */ \
"dup v2.2D, v0.D[1] \n" /* R */
void RGB565ToARGBRow_NEON(const uint8* src_rgb565, uint8* dst_argb, int width) {
asm volatile(
"movi v3.8b, #255 \n" // Alpha
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 RGB565 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
RGB565TOARGB
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%1], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_rgb565), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v6" // Clobber List
);
}
#define ARGB1555TOARGB \
"ushr v2.8h, v0.8h, #10 \n" /* R xxxRRRRR */ \
"shl v2.8h, v2.8h, #3 \n" /* R RRRRR000 upper 5 */ \
"xtn v3.8b, v2.8h \n" /* RRRRR000 AAAAAAAA */ \
\
"sshr v2.8h, v0.8h, #15 \n" /* A AAAAAAAA */ \
"xtn2 v3.16b, v2.8h \n" \
\
"xtn v2.8b, v0.8h \n" /* B xxxBBBBB */ \
"shrn2 v2.16b,v0.8h, #5 \n" /* G xxxGGGGG */ \
\
"ushr v1.16b, v3.16b, #5 \n" /* R,A 00000RRR lower 3 */ \
"shl v0.16b, v2.16b, #3 \n" /* B,G BBBBB000 upper 5 */ \
"ushr v2.16b, v0.16b, #5 \n" /* B,G 00000BBB lower 3 */ \
\
"orr v0.16b, v0.16b, v2.16b \n" /* B,G */ \
"orr v2.16b, v1.16b, v3.16b \n" /* R,A */ \
"dup v1.2D, v0.D[1] \n" \
"dup v3.2D, v2.D[1] \n"
// RGB555TOARGB is same as ARGB1555TOARGB but ignores alpha.
#define RGB555TOARGB \
"ushr v2.8h, v0.8h, #10 \n" /* R xxxRRRRR */ \
"shl v2.8h, v2.8h, #3 \n" /* R RRRRR000 upper 5 */ \
"xtn v3.8b, v2.8h \n" /* RRRRR000 */ \
\
"xtn v2.8b, v0.8h \n" /* B xxxBBBBB */ \
"shrn2 v2.16b,v0.8h, #5 \n" /* G xxxGGGGG */ \
\
"ushr v1.16b, v3.16b, #5 \n" /* R 00000RRR lower 3 */ \
"shl v0.16b, v2.16b, #3 \n" /* B,G BBBBB000 upper 5 */ \
"ushr v2.16b, v0.16b, #5 \n" /* B,G 00000BBB lower 3 */ \
\
"orr v0.16b, v0.16b, v2.16b \n" /* B,G */ \
"orr v2.16b, v1.16b, v3.16b \n" /* R */ \
"dup v1.2D, v0.D[1] \n" /* G */
void ARGB1555ToARGBRow_NEON(const uint8* src_argb1555,
uint8* dst_argb,
int width) {
asm volatile(
"movi v3.8b, #255 \n" // Alpha
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 ARGB1555 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGB1555TOARGB
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%1], #32 \n" // store 8 ARGB
// pixels
"b.gt 1b \n"
: "+r"(src_argb1555), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
);
}
#define ARGB4444TOARGB \
"shrn v1.8b, v0.8h, #8 \n" /* v1(l) AR */ \
"xtn2 v1.16b, v0.8h \n" /* v1(h) GB */ \
"shl v2.16b, v1.16b, #4 \n" /* B,R BBBB0000 */ \
"ushr v3.16b, v1.16b, #4 \n" /* G,A 0000GGGG */ \
"ushr v0.16b, v2.16b, #4 \n" /* B,R 0000BBBB */ \
"shl v1.16b, v3.16b, #4 \n" /* G,A GGGG0000 */ \
"orr v2.16b, v0.16b, v2.16b \n" /* B,R BBBBBBBB */ \
"orr v3.16b, v1.16b, v3.16b \n" /* G,A GGGGGGGG */ \
"dup v0.2D, v2.D[1] \n" \
"dup v1.2D, v3.D[1] \n"
void ARGB4444ToARGBRow_NEON(const uint8* src_argb4444,
uint8* dst_argb,
int width) {
asm volatile(
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 ARGB4444 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGB4444TOARGB
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%1], #32 \n" // store 8 ARGB
// pixels
"b.gt 1b \n"
: "+r"(src_argb4444), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4" // Clobber List
);
}
void ARGBToRGB24Row_NEON(const uint8* src_argb, uint8* dst_rgb24, int width) {
asm volatile(
"1: \n"
"ld4 {v1.8b,v2.8b,v3.8b,v4.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"st3 {v1.8b,v2.8b,v3.8b}, [%1], #24 \n" // store 8 pixels of
// RGB24.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_rgb24), // %1
"+r"(width) // %2
:
: "cc", "memory", "v1", "v2", "v3", "v4" // Clobber List
);
}
void ARGBToRAWRow_NEON(const uint8* src_argb, uint8* dst_raw, int width) {
asm volatile(
"1: \n"
"ld4 {v1.8b,v2.8b,v3.8b,v4.8b}, [%0], #32 \n" // load b g r a
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"orr v4.8b, v2.8b, v2.8b \n" // mov g
"orr v5.8b, v1.8b, v1.8b \n" // mov b
"st3 {v3.8b,v4.8b,v5.8b}, [%1], #24 \n" // store r g b
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_raw), // %1
"+r"(width) // %2
:
: "cc", "memory", "v1", "v2", "v3", "v4", "v5" // Clobber List
);
}
void YUY2ToYRow_NEON(const uint8* src_yuy2, uint8* dst_y, int width) {
asm volatile(
"1: \n"
"ld2 {v0.16b,v1.16b}, [%0], #32 \n" // load 16 pixels of YUY2.
"subs %w2, %w2, #16 \n" // 16 processed per loop.
"st1 {v0.16b}, [%1], #16 \n" // store 16 pixels of Y.
"b.gt 1b \n"
: "+r"(src_yuy2), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1" // Clobber List
);
}
void UYVYToYRow_NEON(const uint8* src_uyvy, uint8* dst_y, int width) {
asm volatile(
"1: \n"
"ld2 {v0.16b,v1.16b}, [%0], #32 \n" // load 16 pixels of UYVY.
"subs %w2, %w2, #16 \n" // 16 processed per loop.
"st1 {v1.16b}, [%1], #16 \n" // store 16 pixels of Y.
"b.gt 1b \n"
: "+r"(src_uyvy), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1" // Clobber List
);
}
void YUY2ToUV422Row_NEON(const uint8* src_yuy2,
uint8* dst_u,
uint8* dst_v,
int width) {
asm volatile(
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 16 YUY2
"subs %w3, %w3, #16 \n" // 16 pixels = 8 UVs.
"st1 {v1.8b}, [%1], #8 \n" // store 8 U.
"st1 {v3.8b}, [%2], #8 \n" // store 8 V.
"b.gt 1b \n"
: "+r"(src_yuy2), // %0
"+r"(dst_u), // %1
"+r"(dst_v), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
);
}
void UYVYToUV422Row_NEON(const uint8* src_uyvy,
uint8* dst_u,
uint8* dst_v,
int width) {
asm volatile(
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 16 UYVY
"subs %w3, %w3, #16 \n" // 16 pixels = 8 UVs.
"st1 {v0.8b}, [%1], #8 \n" // store 8 U.
"st1 {v2.8b}, [%2], #8 \n" // store 8 V.
"b.gt 1b \n"
: "+r"(src_uyvy), // %0
"+r"(dst_u), // %1
"+r"(dst_v), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
);
}
void YUY2ToUVRow_NEON(const uint8* src_yuy2,
int stride_yuy2,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_yuy2b = src_yuy2 + stride_yuy2;
asm volatile(
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 16 pixels
"subs %w4, %w4, #16 \n" // 16 pixels = 8 UVs.
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // load next row
"urhadd v1.8b, v1.8b, v5.8b \n" // average rows of U
"urhadd v3.8b, v3.8b, v7.8b \n" // average rows of V
"st1 {v1.8b}, [%2], #8 \n" // store 8 U.
"st1 {v3.8b}, [%3], #8 \n" // store 8 V.
"b.gt 1b \n"
: "+r"(src_yuy2), // %0
"+r"(src_yuy2b), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6",
"v7" // Clobber List
);
}
void UYVYToUVRow_NEON(const uint8* src_uyvy,
int stride_uyvy,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_uyvyb = src_uyvy + stride_uyvy;
asm volatile(
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 16 pixels
"subs %w4, %w4, #16 \n" // 16 pixels = 8 UVs.
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // load next row
"urhadd v0.8b, v0.8b, v4.8b \n" // average rows of U
"urhadd v2.8b, v2.8b, v6.8b \n" // average rows of V
"st1 {v0.8b}, [%2], #8 \n" // store 8 U.
"st1 {v2.8b}, [%3], #8 \n" // store 8 V.
"b.gt 1b \n"
: "+r"(src_uyvy), // %0
"+r"(src_uyvyb), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6",
"v7" // Clobber List
);
}
// For BGRAToARGB, ABGRToARGB, RGBAToARGB, and ARGBToRGBA.
void ARGBShuffleRow_NEON(const uint8* src_argb,
uint8* dst_argb,
const uint8* shuffler,
int width) {
asm volatile(
"ld1 {v2.16b}, [%3] \n" // shuffler
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 4 pixels.
"subs %w2, %w2, #4 \n" // 4 processed per loop
"tbl v1.16b, {v0.16b}, v2.16b \n" // look up 4 pixels
"st1 {v1.16b}, [%1], #16 \n" // store 4.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
: "r"(shuffler) // %3
: "cc", "memory", "v0", "v1", "v2" // Clobber List
);
}
void I422ToYUY2Row_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_yuy2,
int width) {
asm volatile(
"1: \n"
"ld2 {v0.8b, v1.8b}, [%0], #16 \n" // load 16 Ys
"orr v2.8b, v1.8b, v1.8b \n"
"ld1 {v1.8b}, [%1], #8 \n" // load 8 Us
"ld1 {v3.8b}, [%2], #8 \n" // load 8 Vs
"subs %w4, %w4, #16 \n" // 16 pixels
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%3], #32 \n" // Store 16 pixels.
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_yuy2), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3");
}
void I422ToUYVYRow_NEON(const uint8* src_y,
const uint8* src_u,
const uint8* src_v,
uint8* dst_uyvy,
int width) {
asm volatile(
"1: \n"
"ld2 {v1.8b,v2.8b}, [%0], #16 \n" // load 16 Ys
"orr v3.8b, v2.8b, v2.8b \n"
"ld1 {v0.8b}, [%1], #8 \n" // load 8 Us
"ld1 {v2.8b}, [%2], #8 \n" // load 8 Vs
"subs %w4, %w4, #16 \n" // 16 pixels
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%3], #32 \n" // Store 16 pixels.
"b.gt 1b \n"
: "+r"(src_y), // %0
"+r"(src_u), // %1
"+r"(src_v), // %2
"+r"(dst_uyvy), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3");
}
void ARGBToRGB565Row_NEON(const uint8* src_argb, uint8* dst_rgb565, int width) {
asm volatile(
"1: \n"
"ld4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%0], #32 \n" // load 8 pixels
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGBTORGB565
"st1 {v0.16b}, [%1], #16 \n" // store 8 pixels RGB565.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_rgb565), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v20", "v21", "v22", "v23");
}
void ARGBToRGB565DitherRow_NEON(const uint8* src_argb,
uint8* dst_rgb,
const uint32 dither4,
int width) {
asm volatile(
"dup v1.4s, %w2 \n" // dither4
"1: \n"
"ld4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%1], #32 \n" // load 8 pixels
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"uqadd v20.8b, v20.8b, v1.8b \n"
"uqadd v21.8b, v21.8b, v1.8b \n"
"uqadd v22.8b, v22.8b, v1.8b \n" ARGBTORGB565
"st1 {v0.16b}, [%0], #16 \n" // store 8 pixels RGB565.
"b.gt 1b \n"
: "+r"(dst_rgb) // %0
: "r"(src_argb), // %1
"r"(dither4), // %2
"r"(width) // %3
: "cc", "memory", "v0", "v1", "v20", "v21", "v22", "v23");
}
void ARGBToARGB1555Row_NEON(const uint8* src_argb,
uint8* dst_argb1555,
int width) {
asm volatile(
"1: \n"
"ld4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%0], #32 \n" // load 8 pixels
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGBTOARGB1555
"st1 {v0.16b}, [%1], #16 \n" // store 8 pixels
// ARGB1555.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb1555), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v20", "v21", "v22", "v23");
}
void ARGBToARGB4444Row_NEON(const uint8* src_argb,
uint8* dst_argb4444,
int width) {
asm volatile(
"movi v4.16b, #0x0f \n" // bits to clear with
// vbic.
"1: \n"
"ld4 {v20.8b,v21.8b,v22.8b,v23.8b}, [%0], #32 \n" // load 8 pixels
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGBTOARGB4444
"st1 {v0.16b}, [%1], #16 \n" // store 8 pixels
// ARGB4444.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb4444), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v4", "v20", "v21", "v22", "v23");
}
void ARGBToYRow_NEON(const uint8* src_argb, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #13 \n" // B * 0.1016 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #33 \n" // R * 0.2578 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v3.8h, v0.8b, v4.8b \n" // B
"umlal v3.8h, v1.8b, v5.8b \n" // G
"umlal v3.8h, v2.8b, v6.8b \n" // R
"sqrshrun v0.8b, v3.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
}
void ARGBExtractAlphaRow_NEON(const uint8* src_argb, uint8* dst_a, int width) {
asm volatile(
"1: \n"
"ld4 {v0.16b,v1.16b,v2.16b,v3.16b}, [%0], #64 \n" // load row 16
// pixels
"subs %w2, %w2, #16 \n" // 16 processed per loop
"st1 {v3.16b}, [%1], #16 \n" // store 16 A's.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_a), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
);
}
void ARGBToYJRow_NEON(const uint8* src_argb, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #15 \n" // B * 0.11400 coefficient
"movi v5.8b, #75 \n" // G * 0.58700 coefficient
"movi v6.8b, #38 \n" // R * 0.29900 coefficient
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v3.8h, v0.8b, v4.8b \n" // B
"umlal v3.8h, v1.8b, v5.8b \n" // G
"umlal v3.8h, v2.8b, v6.8b \n" // R
"sqrshrun v0.8b, v3.8h, #7 \n" // 15 bit to 8 bit Y
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6");
}
// 8x1 pixels.
void ARGBToUV444Row_NEON(const uint8* src_argb,
uint8* dst_u,
uint8* dst_v,
int width) {
asm volatile(
"movi v24.8b, #112 \n" // UB / VR 0.875
// coefficient
"movi v25.8b, #74 \n" // UG -0.5781 coefficient
"movi v26.8b, #38 \n" // UR -0.2969 coefficient
"movi v27.8b, #18 \n" // VB -0.1406 coefficient
"movi v28.8b, #94 \n" // VG -0.7344 coefficient
"movi v29.16b,#0x80 \n" // 128.5
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
// pixels.
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"umull v4.8h, v0.8b, v24.8b \n" // B
"umlsl v4.8h, v1.8b, v25.8b \n" // G
"umlsl v4.8h, v2.8b, v26.8b \n" // R
"add v4.8h, v4.8h, v29.8h \n" // +128 -> unsigned
"umull v3.8h, v2.8b, v24.8b \n" // R
"umlsl v3.8h, v1.8b, v28.8b \n" // G
"umlsl v3.8h, v0.8b, v27.8b \n" // B
"add v3.8h, v3.8h, v29.8h \n" // +128 -> unsigned
"uqshrn v0.8b, v4.8h, #8 \n" // 16 bit to 8 bit U
"uqshrn v1.8b, v3.8h, #8 \n" // 16 bit to 8 bit V
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%2], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_u), // %1
"+r"(dst_v), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v24", "v25", "v26",
"v27", "v28", "v29");
}
#define RGBTOUV_SETUP_REG \
"movi v20.8h, #56, lsl #0 \n" /* UB/VR coefficient (0.875) / 2 */ \
"movi v21.8h, #37, lsl #0 \n" /* UG coefficient (-0.5781) / 2 */ \
"movi v22.8h, #19, lsl #0 \n" /* UR coefficient (-0.2969) / 2 */ \
"movi v23.8h, #9, lsl #0 \n" /* VB coefficient (-0.1406) / 2 */ \
"movi v24.8h, #47, lsl #0 \n" /* VG coefficient (-0.7344) / 2 */ \
"movi v25.16b, #0x80 \n" /* 128.5 (0x8080 in 16-bit) */
// 16x2 pixels -> 8x1. width is number of argb pixels. e.g. 16.
// clang-format off
#define RGBTOUV(QB, QG, QR) \
"mul v3.8h, " #QB ",v20.8h \n" /* B */ \
"mul v4.8h, " #QR ",v20.8h \n" /* R */ \
"mls v3.8h, " #QG ",v21.8h \n" /* G */ \
"mls v4.8h, " #QG ",v24.8h \n" /* G */ \
"mls v3.8h, " #QR ",v22.8h \n" /* R */ \
"mls v4.8h, " #QB ",v23.8h \n" /* B */ \
"add v3.8h, v3.8h, v25.8h \n" /* +128 -> unsigned */ \
"add v4.8h, v4.8h, v25.8h \n" /* +128 -> unsigned */ \
"uqshrn v0.8b, v3.8h, #8 \n" /* 16 bit to 8 bit U */ \
"uqshrn v1.8b, v4.8h, #8 \n" /* 16 bit to 8 bit V */
// clang-format on
// TODO(fbarchard): Consider vhadd vertical, then vpaddl horizontal, avoid shr.
// TODO(fbarchard): consider ptrdiff_t for all strides.
void ARGBToUVRow_NEON(const uint8* src_argb,
int src_stride_argb,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_argb_1 = src_argb + src_stride_argb;
asm volatile (
RGBTOUV_SETUP_REG
"1: \n"
"ld4 {v0.16b,v1.16b,v2.16b,v3.16b}, [%0], #64 \n" // load 16 pixels.
"uaddlp v0.8h, v0.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v1.8h, v1.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v2.8h, v2.16b \n" // R 16 bytes -> 8 shorts.
"ld4 {v4.16b,v5.16b,v6.16b,v7.16b}, [%1], #64 \n" // load next 16
"uadalp v0.8h, v4.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v1.8h, v5.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v2.8h, v6.16b \n" // R 16 bytes -> 8 shorts.
"urshr v0.8h, v0.8h, #1 \n" // 2x average
"urshr v1.8h, v1.8h, #1 \n"
"urshr v2.8h, v2.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v0.8h, v1.8h, v2.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(src_argb_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
// TODO(fbarchard): Subsample match C code.
void ARGBToUVJRow_NEON(const uint8* src_argb,
int src_stride_argb,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_argb_1 = src_argb + src_stride_argb;
asm volatile (
"movi v20.8h, #63, lsl #0 \n" // UB/VR coeff (0.500) / 2
"movi v21.8h, #42, lsl #0 \n" // UG coeff (-0.33126) / 2
"movi v22.8h, #21, lsl #0 \n" // UR coeff (-0.16874) / 2
"movi v23.8h, #10, lsl #0 \n" // VB coeff (-0.08131) / 2
"movi v24.8h, #53, lsl #0 \n" // VG coeff (-0.41869) / 2
"movi v25.16b, #0x80 \n" // 128.5 (0x8080 in 16-bit)
"1: \n"
"ld4 {v0.16b,v1.16b,v2.16b,v3.16b}, [%0], #64 \n" // load 16 pixels.
"uaddlp v0.8h, v0.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v1.8h, v1.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v2.8h, v2.16b \n" // R 16 bytes -> 8 shorts.
"ld4 {v4.16b,v5.16b,v6.16b,v7.16b}, [%1], #64 \n" // load next 16
"uadalp v0.8h, v4.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v1.8h, v5.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v2.8h, v6.16b \n" // R 16 bytes -> 8 shorts.
"urshr v0.8h, v0.8h, #1 \n" // 2x average
"urshr v1.8h, v1.8h, #1 \n"
"urshr v2.8h, v2.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v0.8h, v1.8h, v2.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(src_argb_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
void BGRAToUVRow_NEON(const uint8* src_bgra,
int src_stride_bgra,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_bgra_1 = src_bgra + src_stride_bgra;
asm volatile (
RGBTOUV_SETUP_REG
"1: \n"
"ld4 {v0.16b,v1.16b,v2.16b,v3.16b}, [%0], #64 \n" // load 16 pixels.
"uaddlp v0.8h, v3.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v3.8h, v2.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v2.8h, v1.16b \n" // R 16 bytes -> 8 shorts.
"ld4 {v4.16b,v5.16b,v6.16b,v7.16b}, [%1], #64 \n" // load 16 more
"uadalp v0.8h, v7.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v3.8h, v6.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v2.8h, v5.16b \n" // R 16 bytes -> 8 shorts.
"urshr v0.8h, v0.8h, #1 \n" // 2x average
"urshr v1.8h, v3.8h, #1 \n"
"urshr v2.8h, v2.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v0.8h, v1.8h, v2.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_bgra), // %0
"+r"(src_bgra_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
void ABGRToUVRow_NEON(const uint8* src_abgr,
int src_stride_abgr,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_abgr_1 = src_abgr + src_stride_abgr;
asm volatile (
RGBTOUV_SETUP_REG
"1: \n"
"ld4 {v0.16b,v1.16b,v2.16b,v3.16b}, [%0], #64 \n" // load 16 pixels.
"uaddlp v3.8h, v2.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v2.8h, v1.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v1.8h, v0.16b \n" // R 16 bytes -> 8 shorts.
"ld4 {v4.16b,v5.16b,v6.16b,v7.16b}, [%1], #64 \n" // load 16 more.
"uadalp v3.8h, v6.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v2.8h, v5.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v1.8h, v4.16b \n" // R 16 bytes -> 8 shorts.
"urshr v0.8h, v3.8h, #1 \n" // 2x average
"urshr v2.8h, v2.8h, #1 \n"
"urshr v1.8h, v1.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v0.8h, v2.8h, v1.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_abgr), // %0
"+r"(src_abgr_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
void RGBAToUVRow_NEON(const uint8* src_rgba,
int src_stride_rgba,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_rgba_1 = src_rgba + src_stride_rgba;
asm volatile (
RGBTOUV_SETUP_REG
"1: \n"
"ld4 {v0.16b,v1.16b,v2.16b,v3.16b}, [%0], #64 \n" // load 16 pixels.
"uaddlp v0.8h, v1.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v1.8h, v2.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v2.8h, v3.16b \n" // R 16 bytes -> 8 shorts.
"ld4 {v4.16b,v5.16b,v6.16b,v7.16b}, [%1], #64 \n" // load 16 more.
"uadalp v0.8h, v5.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v1.8h, v6.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v2.8h, v7.16b \n" // R 16 bytes -> 8 shorts.
"urshr v0.8h, v0.8h, #1 \n" // 2x average
"urshr v1.8h, v1.8h, #1 \n"
"urshr v2.8h, v2.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v0.8h, v1.8h, v2.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_rgba), // %0
"+r"(src_rgba_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
void RGB24ToUVRow_NEON(const uint8* src_rgb24,
int src_stride_rgb24,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_rgb24_1 = src_rgb24 + src_stride_rgb24;
asm volatile (
RGBTOUV_SETUP_REG
"1: \n"
"ld3 {v0.16b,v1.16b,v2.16b}, [%0], #48 \n" // load 16 pixels.
"uaddlp v0.8h, v0.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v1.8h, v1.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v2.8h, v2.16b \n" // R 16 bytes -> 8 shorts.
"ld3 {v4.16b,v5.16b,v6.16b}, [%1], #48 \n" // load 16 more.
"uadalp v0.8h, v4.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v1.8h, v5.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v2.8h, v6.16b \n" // R 16 bytes -> 8 shorts.
"urshr v0.8h, v0.8h, #1 \n" // 2x average
"urshr v1.8h, v1.8h, #1 \n"
"urshr v2.8h, v2.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v0.8h, v1.8h, v2.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_rgb24), // %0
"+r"(src_rgb24_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
void RAWToUVRow_NEON(const uint8* src_raw,
int src_stride_raw,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_raw_1 = src_raw + src_stride_raw;
asm volatile (
RGBTOUV_SETUP_REG
"1: \n"
"ld3 {v0.16b,v1.16b,v2.16b}, [%0], #48 \n" // load 8 RAW pixels.
"uaddlp v2.8h, v2.16b \n" // B 16 bytes -> 8 shorts.
"uaddlp v1.8h, v1.16b \n" // G 16 bytes -> 8 shorts.
"uaddlp v0.8h, v0.16b \n" // R 16 bytes -> 8 shorts.
"ld3 {v4.16b,v5.16b,v6.16b}, [%1], #48 \n" // load 8 more RAW pixels
"uadalp v2.8h, v6.16b \n" // B 16 bytes -> 8 shorts.
"uadalp v1.8h, v5.16b \n" // G 16 bytes -> 8 shorts.
"uadalp v0.8h, v4.16b \n" // R 16 bytes -> 8 shorts.
"urshr v2.8h, v2.8h, #1 \n" // 2x average
"urshr v1.8h, v1.8h, #1 \n"
"urshr v0.8h, v0.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 32 processed per loop.
RGBTOUV(v2.8h, v1.8h, v0.8h)
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_raw), // %0
"+r"(src_raw_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7",
"v20", "v21", "v22", "v23", "v24", "v25"
);
}
// 16x2 pixels -> 8x1. width is number of argb pixels. e.g. 16.
void RGB565ToUVRow_NEON(const uint8* src_rgb565,
int src_stride_rgb565,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_rgb565_1 = src_rgb565 + src_stride_rgb565;
asm volatile(
"movi v22.8h, #56, lsl #0 \n" // UB / VR coeff (0.875) /
// 2
"movi v23.8h, #37, lsl #0 \n" // UG coeff (-0.5781) / 2
"movi v24.8h, #19, lsl #0 \n" // UR coeff (-0.2969) / 2
"movi v25.8h, #9 , lsl #0 \n" // VB coeff (-0.1406) / 2
"movi v26.8h, #47, lsl #0 \n" // VG coeff (-0.7344) / 2
"movi v27.16b, #0x80 \n" // 128.5 0x8080 in 16bit
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 RGB565 pixels.
RGB565TOARGB
"uaddlp v16.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uaddlp v18.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uaddlp v20.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%0], #16 \n" // next 8 RGB565 pixels.
RGB565TOARGB
"uaddlp v17.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uaddlp v19.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uaddlp v21.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%1], #16 \n" // load 8 RGB565 pixels.
RGB565TOARGB
"uadalp v16.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uadalp v18.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uadalp v20.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%1], #16 \n" // next 8 RGB565 pixels.
RGB565TOARGB
"uadalp v17.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uadalp v19.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uadalp v21.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ins v16.D[1], v17.D[0] \n"
"ins v18.D[1], v19.D[0] \n"
"ins v20.D[1], v21.D[0] \n"
"urshr v4.8h, v16.8h, #1 \n" // 2x average
"urshr v5.8h, v18.8h, #1 \n"
"urshr v6.8h, v20.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 16 processed per loop.
"mul v16.8h, v4.8h, v22.8h \n" // B
"mls v16.8h, v5.8h, v23.8h \n" // G
"mls v16.8h, v6.8h, v24.8h \n" // R
"add v16.8h, v16.8h, v27.8h \n" // +128 -> unsigned
"mul v17.8h, v6.8h, v22.8h \n" // R
"mls v17.8h, v5.8h, v26.8h \n" // G
"mls v17.8h, v4.8h, v25.8h \n" // B
"add v17.8h, v17.8h, v27.8h \n" // +128 -> unsigned
"uqshrn v0.8b, v16.8h, #8 \n" // 16 bit to 8 bit U
"uqshrn v1.8b, v17.8h, #8 \n" // 16 bit to 8 bit V
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_rgb565), // %0
"+r"(src_rgb565_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16",
"v17", "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26",
"v27");
}
// 16x2 pixels -> 8x1. width is number of argb pixels. e.g. 16.
void ARGB1555ToUVRow_NEON(const uint8* src_argb1555,
int src_stride_argb1555,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_argb1555_1 = src_argb1555 + src_stride_argb1555;
asm volatile(
RGBTOUV_SETUP_REG
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 ARGB1555 pixels.
RGB555TOARGB
"uaddlp v16.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uaddlp v17.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uaddlp v18.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%0], #16 \n" // next 8 ARGB1555 pixels.
RGB555TOARGB
"uaddlp v26.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uaddlp v27.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uaddlp v28.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%1], #16 \n" // load 8 ARGB1555 pixels.
RGB555TOARGB
"uadalp v16.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uadalp v17.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uadalp v18.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%1], #16 \n" // next 8 ARGB1555 pixels.
RGB555TOARGB
"uadalp v26.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uadalp v27.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uadalp v28.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ins v16.D[1], v26.D[0] \n"
"ins v17.D[1], v27.D[0] \n"
"ins v18.D[1], v28.D[0] \n"
"urshr v4.8h, v16.8h, #1 \n" // 2x average
"urshr v5.8h, v17.8h, #1 \n"
"urshr v6.8h, v18.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 16 processed per loop.
"mul v2.8h, v4.8h, v20.8h \n" // B
"mls v2.8h, v5.8h, v21.8h \n" // G
"mls v2.8h, v6.8h, v22.8h \n" // R
"add v2.8h, v2.8h, v25.8h \n" // +128 -> unsigned
"mul v3.8h, v6.8h, v20.8h \n" // R
"mls v3.8h, v5.8h, v24.8h \n" // G
"mls v3.8h, v4.8h, v23.8h \n" // B
"add v3.8h, v3.8h, v25.8h \n" // +128 -> unsigned
"uqshrn v0.8b, v2.8h, #8 \n" // 16 bit to 8 bit U
"uqshrn v1.8b, v3.8h, #8 \n" // 16 bit to 8 bit V
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_argb1555), // %0
"+r"(src_argb1555_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v16", "v17",
"v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27",
"v28");
}
// 16x2 pixels -> 8x1. width is number of argb pixels. e.g. 16.
void ARGB4444ToUVRow_NEON(const uint8* src_argb4444,
int src_stride_argb4444,
uint8* dst_u,
uint8* dst_v,
int width) {
const uint8* src_argb4444_1 = src_argb4444 + src_stride_argb4444;
asm volatile(
RGBTOUV_SETUP_REG
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 ARGB4444 pixels.
ARGB4444TOARGB
"uaddlp v16.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uaddlp v17.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uaddlp v18.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%0], #16 \n" // next 8 ARGB4444 pixels.
ARGB4444TOARGB
"uaddlp v26.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uaddlp v27.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uaddlp v28.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%1], #16 \n" // load 8 ARGB4444 pixels.
ARGB4444TOARGB
"uadalp v16.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uadalp v17.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uadalp v18.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ld1 {v0.16b}, [%1], #16 \n" // next 8 ARGB4444 pixels.
ARGB4444TOARGB
"uadalp v26.4h, v0.8b \n" // B 8 bytes -> 4 shorts.
"uadalp v27.4h, v1.8b \n" // G 8 bytes -> 4 shorts.
"uadalp v28.4h, v2.8b \n" // R 8 bytes -> 4 shorts.
"ins v16.D[1], v26.D[0] \n"
"ins v17.D[1], v27.D[0] \n"
"ins v18.D[1], v28.D[0] \n"
"urshr v4.8h, v16.8h, #1 \n" // 2x average
"urshr v5.8h, v17.8h, #1 \n"
"urshr v6.8h, v18.8h, #1 \n"
"subs %w4, %w4, #16 \n" // 16 processed per loop.
"mul v2.8h, v4.8h, v20.8h \n" // B
"mls v2.8h, v5.8h, v21.8h \n" // G
"mls v2.8h, v6.8h, v22.8h \n" // R
"add v2.8h, v2.8h, v25.8h \n" // +128 -> unsigned
"mul v3.8h, v6.8h, v20.8h \n" // R
"mls v3.8h, v5.8h, v24.8h \n" // G
"mls v3.8h, v4.8h, v23.8h \n" // B
"add v3.8h, v3.8h, v25.8h \n" // +128 -> unsigned
"uqshrn v0.8b, v2.8h, #8 \n" // 16 bit to 8 bit U
"uqshrn v1.8b, v3.8h, #8 \n" // 16 bit to 8 bit V
"st1 {v0.8b}, [%2], #8 \n" // store 8 pixels U.
"st1 {v1.8b}, [%3], #8 \n" // store 8 pixels V.
"b.gt 1b \n"
: "+r"(src_argb4444), // %0
"+r"(src_argb4444_1), // %1
"+r"(dst_u), // %2
"+r"(dst_v), // %3
"+r"(width) // %4
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v16", "v17",
"v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v26", "v27",
"v28"
);
}
void RGB565ToYRow_NEON(const uint8* src_rgb565, uint8* dst_y, int width) {
asm volatile(
"movi v24.8b, #13 \n" // B * 0.1016 coefficient
"movi v25.8b, #65 \n" // G * 0.5078 coefficient
"movi v26.8b, #33 \n" // R * 0.2578 coefficient
"movi v27.8b, #16 \n" // Add 16 constant
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 RGB565 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
RGB565TOARGB
"umull v3.8h, v0.8b, v24.8b \n" // B
"umlal v3.8h, v1.8b, v25.8b \n" // G
"umlal v3.8h, v2.8b, v26.8b \n" // R
"sqrshrun v0.8b, v3.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v27.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_rgb565), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v6", "v24", "v25", "v26",
"v27");
}
void ARGB1555ToYRow_NEON(const uint8* src_argb1555, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #13 \n" // B * 0.1016 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #33 \n" // R * 0.2578 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 ARGB1555 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGB1555TOARGB
"umull v3.8h, v0.8b, v4.8b \n" // B
"umlal v3.8h, v1.8b, v5.8b \n" // G
"umlal v3.8h, v2.8b, v6.8b \n" // R
"sqrshrun v0.8b, v3.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_argb1555), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
}
void ARGB4444ToYRow_NEON(const uint8* src_argb4444, uint8* dst_y, int width) {
asm volatile(
"movi v24.8b, #13 \n" // B * 0.1016 coefficient
"movi v25.8b, #65 \n" // G * 0.5078 coefficient
"movi v26.8b, #33 \n" // R * 0.2578 coefficient
"movi v27.8b, #16 \n" // Add 16 constant
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 8 ARGB4444 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
ARGB4444TOARGB
"umull v3.8h, v0.8b, v24.8b \n" // B
"umlal v3.8h, v1.8b, v25.8b \n" // G
"umlal v3.8h, v2.8b, v26.8b \n" // R
"sqrshrun v0.8b, v3.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v27.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_argb4444), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v24", "v25", "v26", "v27");
}
void BGRAToYRow_NEON(const uint8* src_bgra, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #33 \n" // R * 0.2578 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #13 \n" // B * 0.1016 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v16.8h, v1.8b, v4.8b \n" // R
"umlal v16.8h, v2.8b, v5.8b \n" // G
"umlal v16.8h, v3.8b, v6.8b \n" // B
"sqrshrun v0.8b, v16.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_bgra), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16");
}
void ABGRToYRow_NEON(const uint8* src_abgr, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #33 \n" // R * 0.2578 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #13 \n" // B * 0.1016 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v16.8h, v0.8b, v4.8b \n" // R
"umlal v16.8h, v1.8b, v5.8b \n" // G
"umlal v16.8h, v2.8b, v6.8b \n" // B
"sqrshrun v0.8b, v16.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_abgr), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16");
}
void RGBAToYRow_NEON(const uint8* src_rgba, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #13 \n" // B * 0.1016 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #33 \n" // R * 0.2578 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v16.8h, v1.8b, v4.8b \n" // B
"umlal v16.8h, v2.8b, v5.8b \n" // G
"umlal v16.8h, v3.8b, v6.8b \n" // R
"sqrshrun v0.8b, v16.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_rgba), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16");
}
void RGB24ToYRow_NEON(const uint8* src_rgb24, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #13 \n" // B * 0.1016 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #33 \n" // R * 0.2578 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld3 {v0.8b,v1.8b,v2.8b}, [%0], #24 \n" // load 8 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v16.8h, v0.8b, v4.8b \n" // B
"umlal v16.8h, v1.8b, v5.8b \n" // G
"umlal v16.8h, v2.8b, v6.8b \n" // R
"sqrshrun v0.8b, v16.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_rgb24), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16");
}
void RAWToYRow_NEON(const uint8* src_raw, uint8* dst_y, int width) {
asm volatile(
"movi v4.8b, #33 \n" // R * 0.2578 coefficient
"movi v5.8b, #65 \n" // G * 0.5078 coefficient
"movi v6.8b, #13 \n" // B * 0.1016 coefficient
"movi v7.8b, #16 \n" // Add 16 constant
"1: \n"
"ld3 {v0.8b,v1.8b,v2.8b}, [%0], #24 \n" // load 8 pixels.
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v16.8h, v0.8b, v4.8b \n" // B
"umlal v16.8h, v1.8b, v5.8b \n" // G
"umlal v16.8h, v2.8b, v6.8b \n" // R
"sqrshrun v0.8b, v16.8h, #7 \n" // 16 bit to 8 bit Y
"uqadd v0.8b, v0.8b, v7.8b \n"
"st1 {v0.8b}, [%1], #8 \n" // store 8 pixels Y.
"b.gt 1b \n"
: "+r"(src_raw), // %0
"+r"(dst_y), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16");
}
// Bilinear filter 16x2 -> 16x1
void InterpolateRow_NEON(uint8* dst_ptr,
const uint8* src_ptr,
ptrdiff_t src_stride,
int dst_width,
int source_y_fraction) {
int y1_fraction = source_y_fraction;
int y0_fraction = 256 - y1_fraction;
const uint8* src_ptr1 = src_ptr + src_stride;
asm volatile(
"cmp %w4, #0 \n"
"b.eq 100f \n"
"cmp %w4, #128 \n"
"b.eq 50f \n"
"dup v5.16b, %w4 \n"
"dup v4.16b, %w5 \n"
// General purpose row blend.
"1: \n"
"ld1 {v0.16b}, [%1], #16 \n"
"ld1 {v1.16b}, [%2], #16 \n"
"subs %w3, %w3, #16 \n"
"umull v2.8h, v0.8b, v4.8b \n"
"umull2 v3.8h, v0.16b, v4.16b \n"
"umlal v2.8h, v1.8b, v5.8b \n"
"umlal2 v3.8h, v1.16b, v5.16b \n"
"rshrn v0.8b, v2.8h, #8 \n"
"rshrn2 v0.16b, v3.8h, #8 \n"
"st1 {v0.16b}, [%0], #16 \n"
"b.gt 1b \n"
"b 99f \n"
// Blend 50 / 50.
"50: \n"
"ld1 {v0.16b}, [%1], #16 \n"
"ld1 {v1.16b}, [%2], #16 \n"
"subs %w3, %w3, #16 \n"
"urhadd v0.16b, v0.16b, v1.16b \n"
"st1 {v0.16b}, [%0], #16 \n"
"b.gt 50b \n"
"b 99f \n"
// Blend 100 / 0 - Copy row unchanged.
"100: \n"
"ld1 {v0.16b}, [%1], #16 \n"
"subs %w3, %w3, #16 \n"
"st1 {v0.16b}, [%0], #16 \n"
"b.gt 100b \n"
"99: \n"
: "+r"(dst_ptr), // %0
"+r"(src_ptr), // %1
"+r"(src_ptr1), // %2
"+r"(dst_width), // %3
"+r"(y1_fraction), // %4
"+r"(y0_fraction) // %5
:
: "cc", "memory", "v0", "v1", "v3", "v4", "v5");
}
// dr * (256 - sa) / 256 + sr = dr - dr * sa / 256 + sr
void ARGBBlendRow_NEON(const uint8* src_argb0,
const uint8* src_argb1,
uint8* dst_argb,
int width) {
asm volatile(
"subs %w3, %w3, #8 \n"
"b.lt 89f \n"
// Blend 8 pixels.
"8: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB0
// pixels
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // load 8 ARGB1
// pixels
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"umull v16.8h, v4.8b, v3.8b \n" // db * a
"umull v17.8h, v5.8b, v3.8b \n" // dg * a
"umull v18.8h, v6.8b, v3.8b \n" // dr * a
"uqrshrn v16.8b, v16.8h, #8 \n" // db >>= 8
"uqrshrn v17.8b, v17.8h, #8 \n" // dg >>= 8
"uqrshrn v18.8b, v18.8h, #8 \n" // dr >>= 8
"uqsub v4.8b, v4.8b, v16.8b \n" // db - (db * a / 256)
"uqsub v5.8b, v5.8b, v17.8b \n" // dg - (dg * a / 256)
"uqsub v6.8b, v6.8b, v18.8b \n" // dr - (dr * a / 256)
"uqadd v0.8b, v0.8b, v4.8b \n" // + sb
"uqadd v1.8b, v1.8b, v5.8b \n" // + sg
"uqadd v2.8b, v2.8b, v6.8b \n" // + sr
"movi v3.8b, #255 \n" // a = 255
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%2], #32 \n" // store 8 ARGB
// pixels
"b.ge 8b \n"
"89: \n"
"adds %w3, %w3, #8-1 \n"
"b.lt 99f \n"
// Blend 1 pixels.
"1: \n"
"ld4 {v0.b,v1.b,v2.b,v3.b}[0], [%0], #4 \n" // load 1 pixel ARGB0.
"ld4 {v4.b,v5.b,v6.b,v7.b}[0], [%1], #4 \n" // load 1 pixel ARGB1.
"subs %w3, %w3, #1 \n" // 1 processed per loop.
"umull v16.8h, v4.8b, v3.8b \n" // db * a
"umull v17.8h, v5.8b, v3.8b \n" // dg * a
"umull v18.8h, v6.8b, v3.8b \n" // dr * a
"uqrshrn v16.8b, v16.8h, #8 \n" // db >>= 8
"uqrshrn v17.8b, v17.8h, #8 \n" // dg >>= 8
"uqrshrn v18.8b, v18.8h, #8 \n" // dr >>= 8
"uqsub v4.8b, v4.8b, v16.8b \n" // db - (db * a / 256)
"uqsub v5.8b, v5.8b, v17.8b \n" // dg - (dg * a / 256)
"uqsub v6.8b, v6.8b, v18.8b \n" // dr - (dr * a / 256)
"uqadd v0.8b, v0.8b, v4.8b \n" // + sb
"uqadd v1.8b, v1.8b, v5.8b \n" // + sg
"uqadd v2.8b, v2.8b, v6.8b \n" // + sr
"movi v3.8b, #255 \n" // a = 255
"st4 {v0.b,v1.b,v2.b,v3.b}[0], [%2], #4 \n" // store 1 pixel.
"b.ge 1b \n"
"99: \n"
: "+r"(src_argb0), // %0
"+r"(src_argb1), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16",
"v17", "v18");
}
// Attenuate 8 pixels at a time.
void ARGBAttenuateRow_NEON(const uint8* src_argb, uint8* dst_argb, int width) {
asm volatile(
// Attenuate 8 pixels.
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v4.8h, v0.8b, v3.8b \n" // b * a
"umull v5.8h, v1.8b, v3.8b \n" // g * a
"umull v6.8h, v2.8b, v3.8b \n" // r * a
"uqrshrn v0.8b, v4.8h, #8 \n" // b >>= 8
"uqrshrn v1.8b, v5.8h, #8 \n" // g >>= 8
"uqrshrn v2.8b, v6.8h, #8 \n" // r >>= 8
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%1], #32 \n" // store 8 ARGB
// pixels
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6");
}
// Quantize 8 ARGB pixels (32 bytes).
// dst = (dst * scale >> 16) * interval_size + interval_offset;
void ARGBQuantizeRow_NEON(uint8* dst_argb,
int scale,
int interval_size,
int interval_offset,
int width) {
asm volatile(
"dup v4.8h, %w2 \n"
"ushr v4.8h, v4.8h, #1 \n" // scale >>= 1
"dup v5.8h, %w3 \n" // interval multiply.
"dup v6.8h, %w4 \n" // interval add
// 8 pixel loop.
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0] \n" // load 8 ARGB.
"subs %w1, %w1, #8 \n" // 8 processed per loop.
"uxtl v0.8h, v0.8b \n" // b (0 .. 255)
"uxtl v1.8h, v1.8b \n"
"uxtl v2.8h, v2.8b \n"
"sqdmulh v0.8h, v0.8h, v4.8h \n" // b * scale
"sqdmulh v1.8h, v1.8h, v4.8h \n" // g
"sqdmulh v2.8h, v2.8h, v4.8h \n" // r
"mul v0.8h, v0.8h, v5.8h \n" // b * interval_size
"mul v1.8h, v1.8h, v5.8h \n" // g
"mul v2.8h, v2.8h, v5.8h \n" // r
"add v0.8h, v0.8h, v6.8h \n" // b + interval_offset
"add v1.8h, v1.8h, v6.8h \n" // g
"add v2.8h, v2.8h, v6.8h \n" // r
"uqxtn v0.8b, v0.8h \n"
"uqxtn v1.8b, v1.8h \n"
"uqxtn v2.8b, v2.8h \n"
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(dst_argb), // %0
"+r"(width) // %1
: "r"(scale), // %2
"r"(interval_size), // %3
"r"(interval_offset) // %4
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6");
}
// Shade 8 pixels at a time by specified value.
// NOTE vqrdmulh.s16 q10, q10, d0[0] must use a scaler register from 0 to 8.
// Rounding in vqrdmulh does +1 to high if high bit of low s16 is set.
void ARGBShadeRow_NEON(const uint8* src_argb,
uint8* dst_argb,
int width,
uint32 value) {
asm volatile(
"dup v0.4s, %w3 \n" // duplicate scale value.
"zip1 v0.8b, v0.8b, v0.8b \n" // v0.8b aarrggbb.
"ushr v0.8h, v0.8h, #1 \n" // scale / 2.
// 8 pixel loop.
"1: \n"
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"uxtl v4.8h, v4.8b \n" // b (0 .. 255)
"uxtl v5.8h, v5.8b \n"
"uxtl v6.8h, v6.8b \n"
"uxtl v7.8h, v7.8b \n"
"sqrdmulh v4.8h, v4.8h, v0.h[0] \n" // b * scale * 2
"sqrdmulh v5.8h, v5.8h, v0.h[1] \n" // g
"sqrdmulh v6.8h, v6.8h, v0.h[2] \n" // r
"sqrdmulh v7.8h, v7.8h, v0.h[3] \n" // a
"uqxtn v4.8b, v4.8h \n"
"uqxtn v5.8b, v5.8h \n"
"uqxtn v6.8b, v6.8h \n"
"uqxtn v7.8b, v7.8h \n"
"st4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
: "r"(value) // %3
: "cc", "memory", "v0", "v4", "v5", "v6", "v7");
}
// Convert 8 ARGB pixels (64 bytes) to 8 Gray ARGB pixels
// Similar to ARGBToYJ but stores ARGB.
// C code is (15 * b + 75 * g + 38 * r + 64) >> 7;
void ARGBGrayRow_NEON(const uint8* src_argb, uint8* dst_argb, int width) {
asm volatile(
"movi v24.8b, #15 \n" // B * 0.11400 coefficient
"movi v25.8b, #75 \n" // G * 0.58700 coefficient
"movi v26.8b, #38 \n" // R * 0.29900 coefficient
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"umull v4.8h, v0.8b, v24.8b \n" // B
"umlal v4.8h, v1.8b, v25.8b \n" // G
"umlal v4.8h, v2.8b, v26.8b \n" // R
"sqrshrun v0.8b, v4.8h, #7 \n" // 15 bit to 8 bit B
"orr v1.8b, v0.8b, v0.8b \n" // G
"orr v2.8b, v0.8b, v0.8b \n" // R
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%1], #32 \n" // store 8 pixels.
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v24", "v25", "v26");
}
// Convert 8 ARGB pixels (32 bytes) to 8 Sepia ARGB pixels.
// b = (r * 35 + g * 68 + b * 17) >> 7
// g = (r * 45 + g * 88 + b * 22) >> 7
// r = (r * 50 + g * 98 + b * 24) >> 7
void ARGBSepiaRow_NEON(uint8* dst_argb, int width) {
asm volatile(
"movi v20.8b, #17 \n" // BB coefficient
"movi v21.8b, #68 \n" // BG coefficient
"movi v22.8b, #35 \n" // BR coefficient
"movi v24.8b, #22 \n" // GB coefficient
"movi v25.8b, #88 \n" // GG coefficient
"movi v26.8b, #45 \n" // GR coefficient
"movi v28.8b, #24 \n" // BB coefficient
"movi v29.8b, #98 \n" // BG coefficient
"movi v30.8b, #50 \n" // BR coefficient
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0] \n" // load 8 ARGB pixels.
"subs %w1, %w1, #8 \n" // 8 processed per loop.
"umull v4.8h, v0.8b, v20.8b \n" // B to Sepia B
"umlal v4.8h, v1.8b, v21.8b \n" // G
"umlal v4.8h, v2.8b, v22.8b \n" // R
"umull v5.8h, v0.8b, v24.8b \n" // B to Sepia G
"umlal v5.8h, v1.8b, v25.8b \n" // G
"umlal v5.8h, v2.8b, v26.8b \n" // R
"umull v6.8h, v0.8b, v28.8b \n" // B to Sepia R
"umlal v6.8h, v1.8b, v29.8b \n" // G
"umlal v6.8h, v2.8b, v30.8b \n" // R
"uqshrn v0.8b, v4.8h, #7 \n" // 16 bit to 8 bit B
"uqshrn v1.8b, v5.8h, #7 \n" // 16 bit to 8 bit G
"uqshrn v2.8b, v6.8h, #7 \n" // 16 bit to 8 bit R
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // store 8 pixels.
"b.gt 1b \n"
: "+r"(dst_argb), // %0
"+r"(width) // %1
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20",
"v21", "v22", "v24", "v25", "v26", "v28", "v29", "v30");
}
// Tranform 8 ARGB pixels (32 bytes) with color matrix.
// TODO(fbarchard): Was same as Sepia except matrix is provided. This function
// needs to saturate. Consider doing a non-saturating version.
void ARGBColorMatrixRow_NEON(const uint8* src_argb,
uint8* dst_argb,
const int8* matrix_argb,
int width) {
asm volatile(
"ld1 {v2.16b}, [%3] \n" // load 3 ARGB vectors.
"sxtl v0.8h, v2.8b \n" // B,G coefficients s16.
"sxtl2 v1.8h, v2.16b \n" // R,A coefficients s16.
"1: \n"
"ld4 {v16.8b,v17.8b,v18.8b,v19.8b}, [%0], #32 \n" // load 8 ARGB
"subs %w2, %w2, #8 \n" // 8 processed per loop.
"uxtl v16.8h, v16.8b \n" // b (0 .. 255) 16 bit
"uxtl v17.8h, v17.8b \n" // g
"uxtl v18.8h, v18.8b \n" // r
"uxtl v19.8h, v19.8b \n" // a
"mul v22.8h, v16.8h, v0.h[0] \n" // B = B * Matrix B
"mul v23.8h, v16.8h, v0.h[4] \n" // G = B * Matrix G
"mul v24.8h, v16.8h, v1.h[0] \n" // R = B * Matrix R
"mul v25.8h, v16.8h, v1.h[4] \n" // A = B * Matrix A
"mul v4.8h, v17.8h, v0.h[1] \n" // B += G * Matrix B
"mul v5.8h, v17.8h, v0.h[5] \n" // G += G * Matrix G
"mul v6.8h, v17.8h, v1.h[1] \n" // R += G * Matrix R
"mul v7.8h, v17.8h, v1.h[5] \n" // A += G * Matrix A
"sqadd v22.8h, v22.8h, v4.8h \n" // Accumulate B
"sqadd v23.8h, v23.8h, v5.8h \n" // Accumulate G
"sqadd v24.8h, v24.8h, v6.8h \n" // Accumulate R
"sqadd v25.8h, v25.8h, v7.8h \n" // Accumulate A
"mul v4.8h, v18.8h, v0.h[2] \n" // B += R * Matrix B
"mul v5.8h, v18.8h, v0.h[6] \n" // G += R * Matrix G
"mul v6.8h, v18.8h, v1.h[2] \n" // R += R * Matrix R
"mul v7.8h, v18.8h, v1.h[6] \n" // A += R * Matrix A
"sqadd v22.8h, v22.8h, v4.8h \n" // Accumulate B
"sqadd v23.8h, v23.8h, v5.8h \n" // Accumulate G
"sqadd v24.8h, v24.8h, v6.8h \n" // Accumulate R
"sqadd v25.8h, v25.8h, v7.8h \n" // Accumulate A
"mul v4.8h, v19.8h, v0.h[3] \n" // B += A * Matrix B
"mul v5.8h, v19.8h, v0.h[7] \n" // G += A * Matrix G
"mul v6.8h, v19.8h, v1.h[3] \n" // R += A * Matrix R
"mul v7.8h, v19.8h, v1.h[7] \n" // A += A * Matrix A
"sqadd v22.8h, v22.8h, v4.8h \n" // Accumulate B
"sqadd v23.8h, v23.8h, v5.8h \n" // Accumulate G
"sqadd v24.8h, v24.8h, v6.8h \n" // Accumulate R
"sqadd v25.8h, v25.8h, v7.8h \n" // Accumulate A
"sqshrun v16.8b, v22.8h, #6 \n" // 16 bit to 8 bit B
"sqshrun v17.8b, v23.8h, #6 \n" // 16 bit to 8 bit G
"sqshrun v18.8b, v24.8h, #6 \n" // 16 bit to 8 bit R
"sqshrun v19.8b, v25.8h, #6 \n" // 16 bit to 8 bit A
"st4 {v16.8b,v17.8b,v18.8b,v19.8b}, [%1], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_argb), // %0
"+r"(dst_argb), // %1
"+r"(width) // %2
: "r"(matrix_argb) // %3
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16",
"v17", "v18", "v19", "v22", "v23", "v24", "v25");
}
// TODO(fbarchard): fix vqshrun in ARGBMultiplyRow_NEON and reenable.
// Multiply 2 rows of ARGB pixels together, 8 pixels at a time.
void ARGBMultiplyRow_NEON(const uint8* src_argb0,
const uint8* src_argb1,
uint8* dst_argb,
int width) {
asm volatile(
// 8 pixel loop.
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // load 8 more
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"umull v0.8h, v0.8b, v4.8b \n" // multiply B
"umull v1.8h, v1.8b, v5.8b \n" // multiply G
"umull v2.8h, v2.8b, v6.8b \n" // multiply R
"umull v3.8h, v3.8b, v7.8b \n" // multiply A
"rshrn v0.8b, v0.8h, #8 \n" // 16 bit to 8 bit B
"rshrn v1.8b, v1.8h, #8 \n" // 16 bit to 8 bit G
"rshrn v2.8b, v2.8h, #8 \n" // 16 bit to 8 bit R
"rshrn v3.8b, v3.8h, #8 \n" // 16 bit to 8 bit A
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%2], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_argb0), // %0
"+r"(src_argb1), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
}
// Add 2 rows of ARGB pixels together, 8 pixels at a time.
void ARGBAddRow_NEON(const uint8* src_argb0,
const uint8* src_argb1,
uint8* dst_argb,
int width) {
asm volatile(
// 8 pixel loop.
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // load 8 more
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"uqadd v0.8b, v0.8b, v4.8b \n"
"uqadd v1.8b, v1.8b, v5.8b \n"
"uqadd v2.8b, v2.8b, v6.8b \n"
"uqadd v3.8b, v3.8b, v7.8b \n"
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%2], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_argb0), // %0
"+r"(src_argb1), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
}
// Subtract 2 rows of ARGB pixels, 8 pixels at a time.
void ARGBSubtractRow_NEON(const uint8* src_argb0,
const uint8* src_argb1,
uint8* dst_argb,
int width) {
asm volatile(
// 8 pixel loop.
"1: \n"
"ld4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%0], #32 \n" // load 8 ARGB
"ld4 {v4.8b,v5.8b,v6.8b,v7.8b}, [%1], #32 \n" // load 8 more
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"uqsub v0.8b, v0.8b, v4.8b \n"
"uqsub v1.8b, v1.8b, v5.8b \n"
"uqsub v2.8b, v2.8b, v6.8b \n"
"uqsub v3.8b, v3.8b, v7.8b \n"
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%2], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_argb0), // %0
"+r"(src_argb1), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
}
// Adds Sobel X and Sobel Y and stores Sobel into ARGB.
// A = 255
// R = Sobel
// G = Sobel
// B = Sobel
void SobelRow_NEON(const uint8* src_sobelx,
const uint8* src_sobely,
uint8* dst_argb,
int width) {
asm volatile(
"movi v3.8b, #255 \n" // alpha
// 8 pixel loop.
"1: \n"
"ld1 {v0.8b}, [%0], #8 \n" // load 8 sobelx.
"ld1 {v1.8b}, [%1], #8 \n" // load 8 sobely.
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"uqadd v0.8b, v0.8b, v1.8b \n" // add
"orr v1.8b, v0.8b, v0.8b \n"
"orr v2.8b, v0.8b, v0.8b \n"
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%2], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_sobelx), // %0
"+r"(src_sobely), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3");
}
// Adds Sobel X and Sobel Y and stores Sobel into plane.
void SobelToPlaneRow_NEON(const uint8* src_sobelx,
const uint8* src_sobely,
uint8* dst_y,
int width) {
asm volatile(
// 16 pixel loop.
"1: \n"
"ld1 {v0.16b}, [%0], #16 \n" // load 16 sobelx.
"ld1 {v1.16b}, [%1], #16 \n" // load 16 sobely.
"subs %w3, %w3, #16 \n" // 16 processed per loop.
"uqadd v0.16b, v0.16b, v1.16b \n" // add
"st1 {v0.16b}, [%2], #16 \n" // store 16 pixels.
"b.gt 1b \n"
: "+r"(src_sobelx), // %0
"+r"(src_sobely), // %1
"+r"(dst_y), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1");
}
// Mixes Sobel X, Sobel Y and Sobel into ARGB.
// A = 255
// R = Sobel X
// G = Sobel
// B = Sobel Y
void SobelXYRow_NEON(const uint8* src_sobelx,
const uint8* src_sobely,
uint8* dst_argb,
int width) {
asm volatile(
"movi v3.8b, #255 \n" // alpha
// 8 pixel loop.
"1: \n"
"ld1 {v2.8b}, [%0], #8 \n" // load 8 sobelx.
"ld1 {v0.8b}, [%1], #8 \n" // load 8 sobely.
"subs %w3, %w3, #8 \n" // 8 processed per loop.
"uqadd v1.8b, v0.8b, v2.8b \n" // add
"st4 {v0.8b,v1.8b,v2.8b,v3.8b}, [%2], #32 \n" // store 8 ARGB
"b.gt 1b \n"
: "+r"(src_sobelx), // %0
"+r"(src_sobely), // %1
"+r"(dst_argb), // %2
"+r"(width) // %3
:
: "cc", "memory", "v0", "v1", "v2", "v3");
}
// SobelX as a matrix is
// -1 0 1
// -2 0 2
// -1 0 1
void SobelXRow_NEON(const uint8* src_y0,
const uint8* src_y1,
const uint8* src_y2,
uint8* dst_sobelx,
int width) {
asm volatile(
"1: \n"
"ld1 {v0.8b}, [%0],%5 \n" // top
"ld1 {v1.8b}, [%0],%6 \n"
"usubl v0.8h, v0.8b, v1.8b \n"
"ld1 {v2.8b}, [%1],%5 \n" // center * 2
"ld1 {v3.8b}, [%1],%6 \n"
"usubl v1.8h, v2.8b, v3.8b \n"
"add v0.8h, v0.8h, v1.8h \n"
"add v0.8h, v0.8h, v1.8h \n"
"ld1 {v2.8b}, [%2],%5 \n" // bottom
"ld1 {v3.8b}, [%2],%6 \n"
"subs %w4, %w4, #8 \n" // 8 pixels
"usubl v1.8h, v2.8b, v3.8b \n"
"add v0.8h, v0.8h, v1.8h \n"
"abs v0.8h, v0.8h \n"
"uqxtn v0.8b, v0.8h \n"
"st1 {v0.8b}, [%3], #8 \n" // store 8 sobelx
"b.gt 1b \n"
: "+r"(src_y0), // %0
"+r"(src_y1), // %1
"+r"(src_y2), // %2
"+r"(dst_sobelx), // %3
"+r"(width) // %4
: "r"(2LL), // %5
"r"(6LL) // %6
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
);
}
// SobelY as a matrix is
// -1 -2 -1
// 0 0 0
// 1 2 1
void SobelYRow_NEON(const uint8* src_y0,
const uint8* src_y1,
uint8* dst_sobely,
int width) {
asm volatile(
"1: \n"
"ld1 {v0.8b}, [%0],%4 \n" // left
"ld1 {v1.8b}, [%1],%4 \n"
"usubl v0.8h, v0.8b, v1.8b \n"
"ld1 {v2.8b}, [%0],%4 \n" // center * 2
"ld1 {v3.8b}, [%1],%4 \n"
"usubl v1.8h, v2.8b, v3.8b \n"
"add v0.8h, v0.8h, v1.8h \n"
"add v0.8h, v0.8h, v1.8h \n"
"ld1 {v2.8b}, [%0],%5 \n" // right
"ld1 {v3.8b}, [%1],%5 \n"
"subs %w3, %w3, #8 \n" // 8 pixels
"usubl v1.8h, v2.8b, v3.8b \n"
"add v0.8h, v0.8h, v1.8h \n"
"abs v0.8h, v0.8h \n"
"uqxtn v0.8b, v0.8h \n"
"st1 {v0.8b}, [%2], #8 \n" // store 8 sobely
"b.gt 1b \n"
: "+r"(src_y0), // %0
"+r"(src_y1), // %1
"+r"(dst_sobely), // %2
"+r"(width) // %3
: "r"(1LL), // %4
"r"(6LL) // %5
: "cc", "memory", "v0", "v1", "v2", "v3" // Clobber List
);
}
// Caveat - rounds float to half float whereas scaling version truncates.
void HalfFloat1Row_NEON(const uint16* src, uint16* dst, float, int width) {
asm volatile(
"1: \n"
"ld1 {v1.16b}, [%0], #16 \n" // load 8 shorts
"subs %w2, %w2, #8 \n" // 8 pixels per loop
"uxtl v2.4s, v1.4h \n" // 8 int's
"uxtl2 v3.4s, v1.8h \n"
"scvtf v2.4s, v2.4s \n" // 8 floats
"scvtf v3.4s, v3.4s \n"
"fcvtn v1.4h, v2.4s \n" // 8 half floats
"fcvtn2 v1.8h, v3.4s \n"
"st1 {v1.16b}, [%1], #16 \n" // store 8 shorts
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width) // %2
:
: "cc", "memory", "v1", "v2", "v3");
}
void HalfFloatRow_NEON(const uint16* src, uint16* dst, float scale, int width) {
asm volatile(
"1: \n"
"ld1 {v1.16b}, [%0], #16 \n" // load 8 shorts
"subs %w2, %w2, #8 \n" // 8 pixels per loop
"uxtl v2.4s, v1.4h \n" // 8 int's
"uxtl2 v3.4s, v1.8h \n"
"scvtf v2.4s, v2.4s \n" // 8 floats
"scvtf v3.4s, v3.4s \n"
"fmul v2.4s, v2.4s, %3.s[0] \n" // adjust exponent
"fmul v3.4s, v3.4s, %3.s[0] \n"
"uqshrn v1.4h, v2.4s, #13 \n" // isolate halffloat
"uqshrn2 v1.8h, v3.4s, #13 \n"
"st1 {v1.16b}, [%1], #16 \n" // store 8 shorts
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width) // %2
: "w"(scale * 1.9259299444e-34f) // %3
: "cc", "memory", "v1", "v2", "v3");
}
float ScaleMaxSamples_NEON(const float* src,
float* dst,
float scale,
int width) {
float fmax;
asm volatile(
"movi v5.4s, #0 \n" // max
"movi v6.4s, #0 \n"
"1: \n"
"ld1 {v1.4s, v2.4s}, [%0], #32 \n" // load 8 samples
"subs %w2, %w2, #8 \n" // 8 processed per loop
"fmul v3.4s, v1.4s, %4.s[0] \n" // scale
"fmul v4.4s, v2.4s, %4.s[0] \n" // scale
"fmax v5.4s, v5.4s, v1.4s \n" // max
"fmax v6.4s, v6.4s, v2.4s \n"
"st1 {v3.4s, v4.4s}, [%1], #32 \n" // store 8 samples
"b.gt 1b \n"
"fmax v5.4s, v5.4s, v6.4s \n" // max
"fmaxv %s3, v5.4s \n" // signed max acculator
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width), // %2
"=w"(fmax) // %3
: "w"(scale) // %4
: "cc", "memory", "v1", "v2", "v3", "v4", "v5", "v6");
return fmax;
}
float ScaleSumSamples_NEON(const float* src,
float* dst,
float scale,
int width) {
float fsum;
asm volatile(
"movi v5.4s, #0 \n" // max
"movi v6.4s, #0 \n" // max
"1: \n"
"ld1 {v1.4s, v2.4s}, [%0], #32 \n" // load 8 samples
"subs %w2, %w2, #8 \n" // 8 processed per loop
"fmul v3.4s, v1.4s, %4.s[0] \n" // scale
"fmul v4.4s, v2.4s, %4.s[0] \n"
"fmla v5.4s, v1.4s, v1.4s \n" // sum of squares
"fmla v6.4s, v2.4s, v2.4s \n"
"st1 {v3.4s, v4.4s}, [%1], #32 \n" // store 8 samples
"b.gt 1b \n"
"faddp v5.4s, v5.4s, v6.4s \n"
"faddp v5.4s, v5.4s, v5.4s \n"
"faddp %3.4s, v5.4s, v5.4s \n" // sum
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width), // %2
"=w"(fsum) // %3
: "w"(scale) // %4
: "cc", "memory", "v1", "v2", "v3", "v4", "v5", "v6");
return fsum;
}
void ScaleSamples_NEON(const float* src, float* dst, float scale, int width) {
asm volatile(
"1: \n"
"ld1 {v1.4s, v2.4s}, [%0], #32 \n" // load 8 samples
"subs %w2, %w2, #8 \n" // 8 processed per loop
"fmul v1.4s, v1.4s, %3.s[0] \n" // scale
"fmul v2.4s, v2.4s, %3.s[0] \n" // scale
"st1 {v1.4s, v2.4s}, [%1], #32 \n" // store 8 samples
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(dst), // %1
"+r"(width) // %2
: "w"(scale) // %3
: "cc", "memory", "v1", "v2");
}
// filter 5 rows with 1, 4, 6, 4, 1 coefficients to produce 1 row.
void GaussCol_NEON(const uint16* src0,
const uint16* src1,
const uint16* src2,
const uint16* src3,
const uint16* src4,
uint32* dst,
int width) {
asm volatile(
"movi v6.8h, #4 \n" // constant 4
"movi v7.8h, #6 \n" // constant 6
"1: \n"
"ld1 {v1.8h}, [%0], #16 \n" // load 8 samples, 5 rows
"ld1 {v2.8h}, [%4], #16 \n"
"uaddl v0.4s, v1.4h, v2.4h \n" // * 1
"uaddl2 v1.4s, v1.8h, v2.8h \n" // * 1
"ld1 {v2.8h}, [%1], #16 \n"
"umlal v0.4s, v2.4h, v6.4h \n" // * 4
"umlal2 v1.4s, v2.8h, v6.8h \n" // * 4
"ld1 {v2.8h}, [%2], #16 \n"
"umlal v0.4s, v2.4h, v7.4h \n" // * 6
"umlal2 v1.4s, v2.8h, v7.8h \n" // * 6
"ld1 {v2.8h}, [%3], #16 \n"
"umlal v0.4s, v2.4h, v6.4h \n" // * 4
"umlal2 v1.4s, v2.8h, v6.8h \n" // * 4
"subs %w6, %w6, #8 \n" // 8 processed per loop
"st1 {v0.4s,v1.4s}, [%5], #32 \n" // store 8 samples
"b.gt 1b \n"
: "+r"(src0), // %0
"+r"(src1), // %1
"+r"(src2), // %2
"+r"(src3), // %3
"+r"(src4), // %4
"+r"(dst), // %5
"+r"(width) // %6
:
: "cc", "memory", "v0", "v1", "v2", "v6", "v7");
}
// filter 5 rows with 1, 4, 6, 4, 1 coefficients to produce 1 row.
void GaussRow_NEON(const uint32* src, uint16* dst, int width) {
const uint32* src1 = src + 1;
const uint32* src2 = src + 2;
const uint32* src3 = src + 3;
asm volatile(
"movi v6.4s, #4 \n" // constant 4
"movi v7.4s, #6 \n" // constant 6
"1: \n"
"ld1 {v0.4s,v1.4s,v2.4s}, [%0], %6 \n" // load 12 source samples
"add v0.4s, v0.4s, v1.4s \n" // * 1
"add v1.4s, v1.4s, v2.4s \n" // * 1
"ld1 {v2.4s,v3.4s}, [%2], #32 \n"
"mla v0.4s, v2.4s, v7.4s \n" // * 6
"mla v1.4s, v3.4s, v7.4s \n" // * 6
"ld1 {v2.4s,v3.4s}, [%1], #32 \n"
"ld1 {v4.4s,v5.4s}, [%3], #32 \n"
"add v2.4s, v2.4s, v4.4s \n" // add rows for * 4
"add v3.4s, v3.4s, v5.4s \n"
"mla v0.4s, v2.4s, v6.4s \n" // * 4
"mla v1.4s, v3.4s, v6.4s \n" // * 4
"subs %w5, %w5, #8 \n" // 8 processed per loop
"uqrshrn v0.4h, v0.4s, #8 \n" // round and pack
"uqrshrn2 v0.8h, v1.4s, #8 \n"
"st1 {v0.8h}, [%4], #16 \n" // store 8 samples
"b.gt 1b \n"
: "+r"(src), // %0
"+r"(src1), // %1
"+r"(src2), // %2
"+r"(src3), // %3
"+r"(dst), // %4
"+r"(width) // %5
: "r"(32LL) // %6
: "cc", "memory", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7");
}
#endif // !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__)
#ifdef __cplusplus
} // extern "C"
} // namespace libyuv
#endif
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