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Diffstat (limited to 'src/main/jni/libyuv/source/scale_neon64.cc')
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1 files changed, 789 insertions, 0 deletions
diff --git a/src/main/jni/libyuv/source/scale_neon64.cc b/src/main/jni/libyuv/source/scale_neon64.cc new file mode 100644 index 000000000..44df55c6c --- /dev/null +++ b/src/main/jni/libyuv/source/scale_neon64.cc @@ -0,0 +1,789 @@ +/* + * 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. +#if !defined(LIBYUV_DISABLE_NEON) && defined(__aarch64__) +#ifdef HAS_SCALEROWDOWN2_NEON +// Read 32x1 throw away even pixels, and write 16x1. +void ScaleRowDown2_NEON(const uint8* src_ptr, ptrdiff_t src_stride, + uint8* dst, int dst_width) { + asm volatile ( + "1: \n" + // load even pixels into v0, odd into v1 + MEMACCESS(0) + "ld2 {v0.16b, v1.16b}, [%0], #32 \n" + "subs %2, %2, #16 \n" // 16 processed per loop + MEMACCESS(1) + "st1 {v1.16b}, [%1], #16 \n" // store odd pixels + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst), // %1 + "+r"(dst_width) // %2 + : + : "v0", "v1" // Clobber List + ); +} +#endif //HAS_SCALEROWDOWN2_NEON + +#ifdef HAS_SCALEROWDOWN2_NEON +// Read 32x2 average down and write 16x1. +void ScaleRowDown2Box_NEON(const uint8* src_ptr, ptrdiff_t src_stride, + uint8* dst, int dst_width) { + asm volatile ( + // change the stride to row 2 pointer + "add %1, %1, %0 \n" + "1: \n" + MEMACCESS(0) + "ld1 {v0.16b, v1.16b}, [%0], #32 \n" // load row 1 and post inc + MEMACCESS(1) + "ld1 {v2.16b, v3.16b}, [%1], #32 \n" // load row 2 and post inc + "subs %3, %3, #16 \n" // 16 processed per loop + "uaddlp v0.8h, v0.16b \n" // row 1 add adjacent + "uaddlp v1.8h, v1.16b \n" + "uadalp v0.8h, v2.16b \n" // row 2 add adjacent + row1 + "uadalp v1.8h, v3.16b \n" + "rshrn v0.8b, v0.8h, #2 \n" // downshift, round and pack + "rshrn2 v0.16b, v1.8h, #2 \n" + MEMACCESS(2) + "st1 {v0.16b}, [%2], #16 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(src_stride), // %1 + "+r"(dst), // %2 + "+r"(dst_width) // %3 + : + : "v0", "v1", "v2", "v3" // Clobber List + ); +} +#endif //HAS_SCALEROWDOWN2_NEON + +#ifdef HAS_SCALEROWDOWN4_NEON +void ScaleRowDown4_NEON(const uint8* src_ptr, ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + asm volatile ( + "1: \n" + MEMACCESS(0) + "ld4 {v0.8b-3.8b}, [%0], #32 \n" // src line 0 + "subs %2, %2, #8 \n" // 8 processed per loop + MEMACCESS(1) + "st1 {v2.8b}, [%1], #8 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width) // %2 + : + : "v0", "v1", "v2", "v3", "memory", "cc" + ); +} +#endif //HAS_SCALEROWDOWN4_NEON + +#ifdef HAS_SCALEROWDOWN4_NEON +void ScaleRowDown4Box_NEON(const uint8* src_ptr, ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + const uint8* src_ptr1 = src_ptr + src_stride; + const uint8* src_ptr2 = src_ptr + src_stride * 2; + const uint8* src_ptr3 = src_ptr + src_stride * 3; +asm volatile ( + "1: \n" + MEMACCESS(0) + "ld1 {v0.16b}, [%0], #16 \n" // load up 16x4 + MEMACCESS(3) + "ld1 {v1.16b}, [%3], #16 \n" + MEMACCESS(4) + "ld1 {v2.16b}, [%4], #16 \n" + MEMACCESS(5) + "ld1 {v3.16b}, [%5], #16 \n" + "subs %2, %2, #4 \n" + "uaddlp v0.8h, v0.16b \n" + "uadalp v0.8h, v1.16b \n" + "uadalp v0.8h, v2.16b \n" + "uadalp v0.8h, v3.16b \n" + "addp v0.8h, v0.8h, v0.8h \n" + "rshrn v0.8b, v0.8h, #4 \n" // divide by 16 w/rounding + MEMACCESS(1) + "st1 {v0.s}[0], [%1], #4 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width), // %2 + "+r"(src_ptr1), // %3 + "+r"(src_ptr2), // %4 + "+r"(src_ptr3) // %5 + : + : "v0", "v1", "v2", "v3", "memory", "cc" + ); +} +#endif //HAS_SCALEROWDOWN4_NEON + +#ifdef HAS_SCALEROWDOWN34_NEON +// Down scale from 4 to 3 pixels. Use the neon multilane read/write +// to load up the every 4th pixel into a 4 different registers. +// Point samples 32 pixels to 24 pixels. +void ScaleRowDown34_NEON(const uint8* src_ptr, + ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + asm volatile ( + "1: \n" + MEMACCESS(0) + "ld4 {v0.8b-v3.8b}, [%0], #32 \n" // src line 0 + "subs %2, %2, #24 \n" + "mov v2.8b, v3.8b \n" // order v0, v1, v2 + MEMACCESS(1) + "st3 {v0.8b-v2.8b}, [%1], #24 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width) // %2 + : + : "v0", "v1", "v2", "v3", "memory", "cc" + ); +} +#endif //HAS_SCALEROWDOWN34_NEON + +#ifdef HAS_SCALEROWDOWN34_NEON +void ScaleRowDown34_0_Box_NEON(const uint8* src_ptr, + ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + asm volatile ( + "movi v20.8b, #3 \n" + "add %3, %3, %0 \n" + "1: \n" + MEMACCESS(0) + "ld4 {v0.8b-v3.8b}, [%0], #32 \n" // src line 0 + MEMACCESS(3) + "ld4 {v4.8b-v7.8b}, [%3], #32 \n" // src line 1 + "subs %2, %2, #24 \n" + + // filter src line 0 with src line 1 + // expand chars to shorts to allow for room + // when adding lines together + "ushll v16.8h, v4.8b, #0 \n" + "ushll v17.8h, v5.8b, #0 \n" + "ushll v18.8h, v6.8b, #0 \n" + "ushll v19.8h, v7.8b, #0 \n" + + // 3 * line_0 + line_1 + "umlal v16.8h, v0.8b, v20.8b \n" + "umlal v17.8h, v1.8b, v20.8b \n" + "umlal v18.8h, v2.8b, v20.8b \n" + "umlal v19.8h, v3.8b, v20.8b \n" + + // (3 * line_0 + line_1) >> 2 + "uqrshrn v0.8b, v16.8h, #2 \n" + "uqrshrn v1.8b, v17.8h, #2 \n" + "uqrshrn v2.8b, v18.8h, #2 \n" + "uqrshrn v3.8b, v19.8h, #2 \n" + + // a0 = (src[0] * 3 + s[1] * 1) >> 2 + "ushll v16.8h, v1.8b, #0 \n" + "umlal v16.8h, v0.8b, v20.8b \n" + "uqrshrn v0.8b, v16.8h, #2 \n" + + // a1 = (src[1] * 1 + s[2] * 1) >> 1 + "urhadd v1.8b, v1.8b, v2.8b \n" + + // a2 = (src[2] * 1 + s[3] * 3) >> 2 + "ushll v16.8h, v2.8b, #0 \n" + "umlal v16.8h, v3.8b, v20.8b \n" + "uqrshrn v2.8b, v16.8h, #2 \n" + + MEMACCESS(1) + "st3 {v0.8b-v2.8b}, [%1], #24 \n" + + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width), // %2 + "+r"(src_stride) // %3 + : + : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16", "v17", "v18", "v19", + "v20", "memory", "cc" + ); +} +#endif //ScaleRowDown34_0_Box_NEON + +#ifdef HAS_SCALEROWDOWN34_NEON +void ScaleRowDown34_1_Box_NEON(const uint8* src_ptr, + ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + asm volatile ( + "movi v20.8b, #3 \n" + "add %3, %3, %0 \n" + "1: \n" + MEMACCESS(0) + "ld4 {v0.8b-v3.8b}, [%0], #32 \n" // src line 0 + MEMACCESS(3) + "ld4 {v4.8b-v7.8b}, [%3], #32 \n" // src line 1 + "subs %2, %2, #24 \n" + // average src line 0 with src line 1 + "urhadd v0.8b, v0.8b, v4.8b \n" + "urhadd v1.8b, v1.8b, v5.8b \n" + "urhadd v2.8b, v2.8b, v6.8b \n" + "urhadd v3.8b, v3.8b, v7.8b \n" + + // a0 = (src[0] * 3 + s[1] * 1) >> 2 + "ushll v4.8h, v1.8b, #0 \n" + "umlal v4.8h, v0.8b, v20.8b \n" + "uqrshrn v0.8b, v4.8h, #2 \n" + + // a1 = (src[1] * 1 + s[2] * 1) >> 1 + "urhadd v1.8b, v1.8b, v2.8b \n" + + // a2 = (src[2] * 1 + s[3] * 3) >> 2 + "ushll v4.8h, v2.8b, #0 \n" + "umlal v4.8h, v3.8b, v20.8b \n" + "uqrshrn v2.8b, v4.8h, #2 \n" + + MEMACCESS(1) + "st3 {v0.8b-v2.8b}, [%1], #24 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width), // %2 + "+r"(src_stride) // %3 + : + : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v20", "memory", "cc" + ); +} +#endif //HAS_SCALEROWDOWN34_NEON + +#ifdef HAS_SCALEROWDOWN38_NEON +static uvec8 kShuf38 = + { 0, 3, 6, 8, 11, 14, 16, 19, 22, 24, 27, 30, 0, 0, 0, 0 }; +static uvec8 kShuf38_2 = + { 0, 16, 32, 2, 18, 33, 4, 20, 34, 6, 22, 35, 0, 0, 0, 0 }; +static vec16 kMult38_Div6 = + { 65536 / 12, 65536 / 12, 65536 / 12, 65536 / 12, + 65536 / 12, 65536 / 12, 65536 / 12, 65536 / 12 }; +static vec16 kMult38_Div9 = + { 65536 / 18, 65536 / 18, 65536 / 18, 65536 / 18, + 65536 / 18, 65536 / 18, 65536 / 18, 65536 / 18 }; + +// 32 -> 12 +void ScaleRowDown38_NEON(const uint8* src_ptr, + ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + asm volatile ( + MEMACCESS(3) + "ld1 {v3.16b}, [%3] \n" + "1: \n" + MEMACCESS(0) + "ld1 {v0.16b, v1.16b}, [%0], #32 \n" + "subs %2, %2, #12 \n" + "tbl v2.16b, {v0.16b, v1.16b}, v3.16b \n" + MEMACCESS(1) + "st1 {v2.8b}, [%1], #8 \n" + MEMACCESS(1) + "st1 {v2.s}[2], [%1], #4 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width) // %2 + : "r"(&kShuf38) // %3 + : "v0", "v1", "v2", "v3", "memory", "cc" + ); +} + +#endif //HAS_SCALEROWDOWN38_NEON + +#ifdef HAS_SCALEROWDOWN38_NEON +// 32x3 -> 12x1 +void OMITFP ScaleRowDown38_3_Box_NEON(const uint8* src_ptr, + ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + const uint8* src_ptr1 = src_ptr + src_stride * 2; + + asm volatile ( + MEMACCESS(5) + "ld1 {v29.8h}, [%5] \n" + MEMACCESS(6) + "ld1 {v30.16b}, [%6] \n" + MEMACCESS(7) + "ld1 {v31.8h}, [%7] \n" + "add %3, %3, %0 \n" + "1: \n" + + // 00 40 01 41 02 42 03 43 + // 10 50 11 51 12 52 13 53 + // 20 60 21 61 22 62 23 63 + // 30 70 31 71 32 72 33 73 + MEMACCESS(0) + "ld4 {v0.8b-v3.8b}, [%0], #32 \n" + MEMACCESS(3) + "ld4 {v4.8b-v7.8b}, [%3], #32 \n" + MEMACCESS(4) + "ld4 {v16.8b-v19.8b}, [%4], #32 \n" + "subs %2, %2, #12 \n" + + // Shuffle the input data around to get align the data + // so adjacent data can be added. 0,1 - 2,3 - 4,5 - 6,7 + // 00 10 01 11 02 12 03 13 + // 40 50 41 51 42 52 43 53 + "trn1 v20.8b, v0.8b, v1.8b \n" + "trn2 v21.8b, v0.8b, v1.8b \n" + "trn1 v22.8b, v4.8b, v5.8b \n" + "trn2 v23.8b, v4.8b, v5.8b \n" + "trn1 v24.8b, v16.8b, v17.8b \n" + "trn2 v25.8b, v16.8b, v17.8b \n" + + // 20 30 21 31 22 32 23 33 + // 60 70 61 71 62 72 63 73 + "trn1 v0.8b, v2.8b, v3.8b \n" + "trn2 v1.8b, v2.8b, v3.8b \n" + "trn1 v4.8b, v6.8b, v7.8b \n" + "trn2 v5.8b, v6.8b, v7.8b \n" + "trn1 v16.8b, v18.8b, v19.8b \n" + "trn2 v17.8b, v18.8b, v19.8b \n" + + // 00+10 01+11 02+12 03+13 + // 40+50 41+51 42+52 43+53 + "uaddlp v20.4h, v20.8b \n" + "uaddlp v21.4h, v21.8b \n" + "uaddlp v22.4h, v22.8b \n" + "uaddlp v23.4h, v23.8b \n" + "uaddlp v24.4h, v24.8b \n" + "uaddlp v25.4h, v25.8b \n" + + // 60+70 61+71 62+72 63+73 + "uaddlp v1.4h, v1.8b \n" + "uaddlp v5.4h, v5.8b \n" + "uaddlp v17.4h, v17.8b \n" + + // combine source lines + "add v20.4h, v20.4h, v22.4h \n" + "add v21.4h, v21.4h, v23.4h \n" + "add v20.4h, v20.4h, v24.4h \n" + "add v21.4h, v21.4h, v25.4h \n" + "add v2.4h, v1.4h, v5.4h \n" + "add v2.4h, v2.4h, v17.4h \n" + + // dst_ptr[3] = (s[6 + st * 0] + s[7 + st * 0] + // + s[6 + st * 1] + s[7 + st * 1] + // + s[6 + st * 2] + s[7 + st * 2]) / 6 + "sqrdmulh v2.8h, v2.8h, v29.8h \n" + "xtn v2.8b, v2.8h \n" + + // Shuffle 2,3 reg around so that 2 can be added to the + // 0,1 reg and 3 can be added to the 4,5 reg. This + // requires expanding from u8 to u16 as the 0,1 and 4,5 + // registers are already expanded. Then do transposes + // to get aligned. + // xx 20 xx 30 xx 21 xx 31 xx 22 xx 32 xx 23 xx 33 + "ushll v16.8h, v16.8b, #0 \n" + "uaddl v0.8h, v0.8b, v4.8b \n" + + // combine source lines + "add v0.8h, v0.8h, v16.8h \n" + + // xx 20 xx 21 xx 22 xx 23 + // xx 30 xx 31 xx 32 xx 33 + "trn1 v1.8h, v0.8h, v0.8h \n" + "trn2 v4.8h, v0.8h, v0.8h \n" + "xtn v0.4h, v1.4s \n" + "xtn v4.4h, v4.4s \n" + + // 0+1+2, 3+4+5 + "add v20.8h, v20.8h, v0.8h \n" + "add v21.8h, v21.8h, v4.8h \n" + + // Need to divide, but can't downshift as the the value + // isn't a power of 2. So multiply by 65536 / n + // and take the upper 16 bits. + "sqrdmulh v0.8h, v20.8h, v31.8h \n" + "sqrdmulh v1.8h, v21.8h, v31.8h \n" + + // Align for table lookup, vtbl requires registers to + // be adjacent + "tbl v3.16b, {v0.16b, v1.16b, v2.16b}, v30.16b \n" + + MEMACCESS(1) + "st1 {v3.8b}, [%1], #8 \n" + MEMACCESS(1) + "st1 {v3.s}[2], [%1], #4 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width), // %2 + "+r"(src_stride), // %3 + "+r"(src_ptr1) // %4 + : "r"(&kMult38_Div6), // %5 + "r"(&kShuf38_2), // %6 + "r"(&kMult38_Div9) // %7 + : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16", "v17", + "v18", "v19", "v20", "v21", "v22", "v23", "v24", "v25", "v29", + "v30", "v31", "memory", "cc" + ); +} +#endif //HAS_SCALEROWDOWN38_NEON + +#ifdef HAS_SCALEROWDOWN38_NEON +// 32x2 -> 12x1 +void ScaleRowDown38_2_Box_NEON(const uint8* src_ptr, + ptrdiff_t src_stride, + uint8* dst_ptr, int dst_width) { + asm volatile ( + MEMACCESS(4) + "ld1 {v30.8h}, [%4] \n" + MEMACCESS(5) + "ld1 {v31.16b}, [%5] \n" + "add %3, %3, %0 \n" + "1: \n" + + // 00 40 01 41 02 42 03 43 + // 10 50 11 51 12 52 13 53 + // 20 60 21 61 22 62 23 63 + // 30 70 31 71 32 72 33 73 + MEMACCESS(0) + "ld4 {v0.8b-v3.8b}, [%0], #32 \n" + MEMACCESS(3) + "ld4 {v4.8b-v7.8b}, [%3], #32 \n" + "subs %2, %2, #12 \n" + + // Shuffle the input data around to get align the data + // so adjacent data can be added. 0,1 - 2,3 - 4,5 - 6,7 + // 00 10 01 11 02 12 03 13 + // 40 50 41 51 42 52 43 53 + "trn1 v16.8b, v0.8b, v1.8b \n" + "trn2 v17.8b, v0.8b, v1.8b \n" + "trn1 v18.8b, v4.8b, v5.8b \n" + "trn2 v19.8b, v4.8b, v5.8b \n" + + // 20 30 21 31 22 32 23 33 + // 60 70 61 71 62 72 63 73 + "trn1 v0.8b, v2.8b, v3.8b \n" + "trn2 v1.8b, v2.8b, v3.8b \n" + "trn1 v4.8b, v6.8b, v7.8b \n" + "trn2 v5.8b, v6.8b, v7.8b \n" + + // 00+10 01+11 02+12 03+13 + // 40+50 41+51 42+52 43+53 + "uaddlp v16.4h, v16.8b \n" + "uaddlp v17.4h, v17.8b \n" + "uaddlp v18.4h, v18.8b \n" + "uaddlp v19.4h, v19.8b \n" + + // 60+70 61+71 62+72 63+73 + "uaddlp v1.4h, v1.8b \n" + "uaddlp v5.4h, v5.8b \n" + + // combine source lines + "add v16.4h, v16.4h, v18.4h \n" + "add v17.4h, v17.4h, v19.4h \n" + "add v2.4h, v1.4h, v5.4h \n" + + // dst_ptr[3] = (s[6] + s[7] + s[6+st] + s[7+st]) / 4 + "uqrshrn v2.8b, v2.8h, #2 \n" + + // Shuffle 2,3 reg around so that 2 can be added to the + // 0,1 reg and 3 can be added to the 4,5 reg. This + // requires expanding from u8 to u16 as the 0,1 and 4,5 + // registers are already expanded. Then do transposes + // to get aligned. + // xx 20 xx 30 xx 21 xx 31 xx 22 xx 32 xx 23 xx 33 + + // combine source lines + "uaddl v0.8h, v0.8b, v4.8b \n" + + // xx 20 xx 21 xx 22 xx 23 + // xx 30 xx 31 xx 32 xx 33 + "trn1 v1.8h, v0.8h, v0.8h \n" + "trn2 v4.8h, v0.8h, v0.8h \n" + "xtn v0.4h, v1.4s \n" + "xtn v4.4h, v4.4s \n" + + // 0+1+2, 3+4+5 + "add v16.8h, v16.8h, v0.8h \n" + "add v17.8h, v17.8h, v4.8h \n" + + // Need to divide, but can't downshift as the the value + // isn't a power of 2. So multiply by 65536 / n + // and take the upper 16 bits. + "sqrdmulh v0.8h, v16.8h, v30.8h \n" + "sqrdmulh v1.8h, v17.8h, v30.8h \n" + + // Align for table lookup, vtbl requires registers to + // be adjacent + + "tbl v3.16b, {v0.16b, v1.16b, v2.16b}, v31.16b \n" + + MEMACCESS(1) + "st1 {v3.8b}, [%1], #8 \n" + MEMACCESS(1) + "st1 {v3.s}[2], [%1], #4 \n" + "bgt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst_ptr), // %1 + "+r"(dst_width), // %2 + "+r"(src_stride) // %3 + : "r"(&kMult38_Div6), // %4 + "r"(&kShuf38_2) // %5 + : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16", "v17", + "v18", "v19", "v30", "v31", "memory", "cc" + ); +} +#endif //HAS_SCALEROWDOWN38_NEON + +// 16x2 -> 16x1 +void ScaleFilterRows_NEON(uint8* dst_ptr, + const uint8* src_ptr, ptrdiff_t src_stride, + int dst_width, int source_y_fraction) { + int y_fraction = 256 - source_y_fraction; + asm volatile ( + "cmp %4, #0 \n" + "beq 100f \n" + "add %2, %2, %1 \n" + "cmp %4, #64 \n" + "beq 75f \n" + "cmp %4, #128 \n" + "beq 50f \n" + "cmp %4, #192 \n" + "beq 25f \n" + + "dup v5.8b, %w4 \n" + "dup v4.8b, %w5 \n" + // General purpose row blend. + "1: \n" + MEMACCESS(1) + "ld1 {v0.16b}, [%1], #16 \n" + MEMACCESS(2) + "ld1 {v1.16b}, [%2], #16 \n" + "subs %3, %3, #16 \n" + "umull v6.8h, v0.8b, v4.8b \n" + "umull2 v7.8h, v0.16b, v4.16b \n" + "umlal v6.8h, v1.8b, v5.8b \n" + "umlal2 v7.8h, v1.16b, v5.16b \n" + "rshrn v0.8b, v6.8h, #8 \n" + "rshrn2 v0.16b, v7.8h, #8 \n" + MEMACCESS(0) + "st1 {v0.16b}, [%0], #16 \n" + "bgt 1b \n" + "b 99f \n" + + // Blend 25 / 75. + "25: \n" + MEMACCESS(1) + "ld1 {v0.16b}, [%1], #16 \n" + MEMACCESS(2) + "ld1 {v1.16b}, [%2], #16 \n" + "subs %3, %3, #16 \n" + "urhadd v0.16b, v0.16b, v1.16b \n" + "urhadd v0.16b, v0.16b, v1.16b \n" + MEMACCESS(0) + "st1 {v0.16b}, [%0], #16 \n" + "bgt 25b \n" + "b 99f \n" + + // Blend 50 / 50. + "50: \n" + MEMACCESS(1) + "ld1 {v0.16b}, [%1], #16 \n" + MEMACCESS(2) + "ld1 {v1.16b}, [%2], #16 \n" + "subs %3, %3, #16 \n" + "urhadd v0.16b, v0.16b, v1.16b \n" + MEMACCESS(0) + "st1 {v0.16b}, [%0], #16 \n" + "bgt 50b \n" + "b 99f \n" + + // Blend 75 / 25. + "75: \n" + MEMACCESS(1) + "ld1 {v1.16b}, [%1], #16 \n" + MEMACCESS(2) + "ld1 {v0.16b}, [%2], #16 \n" + "subs %3, %3, #16 \n" + "urhadd v0.16b, v0.16b, v1.16b \n" + "urhadd v0.16b, v0.16b, v1.16b \n" + MEMACCESS(0) + "st1 {v0.16b}, [%0], #16 \n" + "bgt 75b \n" + "b 99f \n" + + // Blend 100 / 0 - Copy row unchanged. + "100: \n" + MEMACCESS(1) + "ld1 {v0.16b}, [%1], #16 \n" + "subs %3, %3, #16 \n" + MEMACCESS(0) + "st1 {v0.16b}, [%0], #16 \n" + "bgt 100b \n" + + "99: \n" + MEMACCESS(0) + "st1 {v0.b}[15], [%0] \n" + : "+r"(dst_ptr), // %0 + "+r"(src_ptr), // %1 + "+r"(src_stride), // %2 + "+r"(dst_width), // %3 + "+r"(source_y_fraction),// %4 + "+r"(y_fraction) // %5 + : + : "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "memory", "cc" + ); +} + +#ifdef HAS_SCALEARGBROWDOWN2_NEON +void ScaleARGBRowDown2_NEON(const uint8* src_ptr, ptrdiff_t src_stride, + uint8* dst, int dst_width) { + asm volatile ( + "1: \n" + // load even pixels into q0, odd into q1 + MEMACCESS (0) + "ld2 {v0.4s, v1.4s}, [%0], #32 \n" + MEMACCESS (0) + "ld2 {v2.4s, v3.4s}, [%0], #32 \n" + "subs %2, %2, #8 \n" // 8 processed per loop + MEMACCESS (1) + "st1 {v1.16b}, [%1], #16 \n" // store odd pixels + MEMACCESS (1) + "st1 {v3.16b}, [%1], #16 \n" + "bgt 1b \n" + : "+r" (src_ptr), // %0 + "+r" (dst), // %1 + "+r" (dst_width) // %2 + : + : "memory", "cc", "v0", "v1", "v2", "v3" // Clobber List + ); +} +#endif //HAS_SCALEARGBROWDOWN2_NEON + +#ifdef HAS_SCALEARGBROWDOWN2_NEON +void ScaleARGBRowDown2Box_NEON(const uint8* src_ptr, ptrdiff_t src_stride, + uint8* dst, int dst_width) { + asm volatile ( + // change the stride to row 2 pointer + "add %1, %1, %0 \n" + "1: \n" + MEMACCESS (0) + "ld4 {v0.16b - v3.16b}, [%0], #64 \n" // load 8 ARGB pixels. + "subs %3, %3, #8 \n" // 8 processed per loop. + "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. + "uaddlp v3.8h, v3.16b \n" // A 16 bytes -> 8 shorts. + MEMACCESS (1) + "ld4 {v16.16b - v19.16b}, [%1], #64 \n" // load 8 more ARGB pixels. + "uadalp v0.8h, v16.16b \n" // B 16 bytes -> 8 shorts. + "uadalp v1.8h, v17.16b \n" // G 16 bytes -> 8 shorts. + "uadalp v2.8h, v18.16b \n" // R 16 bytes -> 8 shorts. + "uadalp v3.8h, v19.16b \n" // A 16 bytes -> 8 shorts. + "rshrn v0.8b, v0.8h, #2 \n" // downshift, round and pack + "rshrn v1.8b, v1.8h, #2 \n" + "rshrn v2.8b, v2.8h, #2 \n" + "rshrn v3.8b, v3.8h, #2 \n" + MEMACCESS (2) + "st4 {v0.8b - v3.8b}, [%2], #32 \n" + "bgt 1b \n" + : "+r" (src_ptr), // %0 + "+r" (src_stride), // %1 + "+r" (dst), // %2 + "+r" (dst_width) // %3 + : + : "memory", "cc", "v0", "v1", "v2", "v3", "v16", "v17", "v18", "v19" + ); +} +#endif //HAS_SCALEARGBROWDOWN2_NEON + +#ifdef HAS_SCALEARGBROWDOWNEVEN_NEON +// Reads 4 pixels at a time. +// Alignment requirement: src_argb 4 byte aligned. +void ScaleARGBRowDownEven_NEON(const uint8* src_argb, ptrdiff_t src_stride, + int src_stepx, uint8* dst_argb, int dst_width) { + asm volatile ( + "1: \n" + MEMACCESS(0) + "ld1 {v0.s}[0], [%0], %3 \n" + MEMACCESS(0) + "ld1 {v0.s}[1], [%0], %3 \n" + MEMACCESS(0) + "ld1 {v0.s}[2], [%0], %3 \n" + MEMACCESS(0) + "ld1 {v0.s}[3], [%0], %3 \n" + "subs %2, %2, #4 \n" // 4 pixels per loop. + MEMACCESS(1) + "st1 {v0.16b}, [%1], #16 \n" + "bgt 1b \n" + : "+r"(src_argb), // %0 + "+r"(dst_argb), // %1 + "+r"(dst_width) // %2 + : "r"(src_stepx * 4) // %3 + : "memory", "cc", "v0" + ); +} +#endif //HAS_SCALEARGBROWDOWNEVEN_NEON + +#ifdef HAS_SCALEARGBROWDOWNEVEN_NEON +// Reads 4 pixels at a time. +// Alignment requirement: src_argb 4 byte aligned. +// TODO, might be worth another optimization pass in future. +// It could be upgraded to 8 pixels at a time to start with. +void ScaleARGBRowDownEvenBox_NEON(const uint8* src_argb, ptrdiff_t src_stride, + int src_stepx, + uint8* dst_argb, int dst_width) { + asm volatile ( + "add %1, %1, %0 \n" + "1: \n" + MEMACCESS(0) + "ld1 {v0.8b}, [%0], %4 \n" // Read 4 2x2 blocks -> 2x1 + MEMACCESS(1) + "ld1 {v1.8b}, [%1], %4 \n" + MEMACCESS(0) + "ld1 {v2.8b}, [%0], %4 \n" + MEMACCESS(1) + "ld1 {v3.8b}, [%1], %4 \n" + MEMACCESS(0) + "ld1 {v4.8b}, [%0], %4 \n" + MEMACCESS(1) + "ld1 {v5.8b}, [%1], %4 \n" + MEMACCESS(0) + "ld1 {v6.8b}, [%0], %4 \n" + MEMACCESS(1) + "ld1 {v7.8b}, [%1], %4 \n" + "uaddl v0.8h, v0.8b, v1.8b \n" + "uaddl v2.8h, v2.8b, v3.8b \n" + "uaddl v4.8h, v4.8b, v5.8b \n" + "uaddl v6.8h, v6.8b, v7.8b \n" + "mov v16.d[1], v0.d[1] \n" // ab_cd -> ac_bd + "mov v0.d[1], v2.d[0] \n" + "mov v2.d[0], v16.d[1] \n" + "mov v16.d[1], v4.d[1] \n" // ef_gh -> eg_fh + "mov v4.d[1], v6.d[0] \n" + "mov v6.d[0], v16.d[1] \n" + "add v0.8h, v0.8h, v2.8h \n" // (a+b)_(c+d) + "add v4.8h, v4.8h, v6.8h \n" // (e+f)_(g+h) + "rshrn v0.8b, v0.8h, #2 \n" // first 2 pixels. + "rshrn2 v0.16b, v4.8h, #2 \n" // next 2 pixels. + "subs %3, %3, #4 \n" // 4 pixels per loop. + MEMACCESS(2) + "st1 {v0.16b}, [%2], #16 \n" + "bgt 1b \n" + : "+r"(src_argb), // %0 + "+r"(src_stride), // %1 + "+r"(dst_argb), // %2 + "+r"(dst_width) // %3 + : "r"(src_stepx * 4) // %4 + : "memory", "cc", "v0", "v1", "v2", "v3", "v4", "v5", "v6", "v7", "v16" + ); +} +#endif // HAS_SCALEARGBROWDOWNEVEN_NEON +#endif // __aarch64__ + +#ifdef __cplusplus +} // extern "C" +} // namespace libyuv +#endif |