| ; |
| ; Copyright (c) 2011 The WebM 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. |
| ; |
| |
| |
| EXPORT |vp8_intra4x4_predict_armv6| |
| |
| ARM |
| REQUIRE8 |
| PRESERVE8 |
| |
| AREA ||.text||, CODE, READONLY, ALIGN=2 |
| |
| |
| ;void vp8_intra4x4_predict(unsigned char *src, int src_stride, int b_mode, |
| ; unsigned char *dst, int dst_stride) |
| |
| |vp8_intra4x4_predict_armv6| PROC |
| push {r4-r12, lr} |
| |
| |
| cmp r2, #10 |
| addlt pc, pc, r2, lsl #2 ; position independent switch |
| pop {r4-r12, pc} ; default |
| b b_dc_pred |
| b b_tm_pred |
| b b_ve_pred |
| b b_he_pred |
| b b_ld_pred |
| b b_rd_pred |
| b b_vr_pred |
| b b_vl_pred |
| b b_hd_pred |
| b b_hu_pred |
| |
| b_dc_pred |
| ; load values |
| ldr r8, [r0, -r1] ; Above |
| ldrb r4, [r0, #-1]! ; Left[0] |
| mov r9, #0 |
| ldrb r5, [r0, r1] ; Left[1] |
| ldrb r6, [r0, r1, lsl #1]! ; Left[2] |
| usad8 r12, r8, r9 |
| ldrb r7, [r0, r1] ; Left[3] |
| |
| ; calculate dc |
| add r4, r4, r5 |
| add r4, r4, r6 |
| add r4, r4, r7 |
| add r4, r4, r12 |
| add r4, r4, #4 |
| ldr r0, [sp, #40] ; load stride |
| mov r12, r4, asr #3 ; (expected_dc + 4) >> 3 |
| |
| add r12, r12, r12, lsl #8 |
| add r3, r3, r0 |
| add r12, r12, r12, lsl #16 |
| |
| ; store values |
| str r12, [r3, -r0] |
| str r12, [r3] |
| str r12, [r3, r0] |
| str r12, [r3, r0, lsl #1] |
| |
| pop {r4-r12, pc} |
| |
| b_tm_pred |
| sub r10, r0, #1 ; Left |
| ldr r8, [r0, -r1] ; Above |
| ldrb r9, [r10, -r1] ; top_left |
| ldrb r4, [r0, #-1]! ; Left[0] |
| ldrb r5, [r10, r1]! ; Left[1] |
| ldrb r6, [r0, r1, lsl #1] ; Left[2] |
| ldrb r7, [r10, r1, lsl #1] ; Left[3] |
| ldr r0, [sp, #40] ; load stride |
| |
| |
| add r9, r9, r9, lsl #16 ; [tl|tl] |
| uxtb16 r10, r8 ; a[2|0] |
| uxtb16 r11, r8, ror #8 ; a[3|1] |
| ssub16 r10, r10, r9 ; a[2|0] - [tl|tl] |
| ssub16 r11, r11, r9 ; a[3|1] - [tl|tl] |
| |
| add r4, r4, r4, lsl #16 ; l[0|0] |
| add r5, r5, r5, lsl #16 ; l[1|1] |
| add r6, r6, r6, lsl #16 ; l[2|2] |
| add r7, r7, r7, lsl #16 ; l[3|3] |
| |
| sadd16 r1, r4, r10 ; l[0|0] + a[2|0] - [tl|tl] |
| sadd16 r2, r4, r11 ; l[0|0] + a[3|1] - [tl|tl] |
| usat16 r1, #8, r1 |
| usat16 r2, #8, r2 |
| |
| sadd16 r4, r5, r10 ; l[1|1] + a[2|0] - [tl|tl] |
| sadd16 r5, r5, r11 ; l[1|1] + a[3|1] - [tl|tl] |
| |
| add r12, r1, r2, lsl #8 ; [3|2|1|0] |
| str r12, [r3], r0 |
| |
| usat16 r4, #8, r4 |
| usat16 r5, #8, r5 |
| |
| sadd16 r1, r6, r10 ; l[2|2] + a[2|0] - [tl|tl] |
| sadd16 r2, r6, r11 ; l[2|2] + a[3|1] - [tl|tl] |
| |
| add r12, r4, r5, lsl #8 ; [3|2|1|0] |
| str r12, [r3], r0 |
| |
| usat16 r1, #8, r1 |
| usat16 r2, #8, r2 |
| |
| sadd16 r4, r7, r10 ; l[3|3] + a[2|0] - [tl|tl] |
| sadd16 r5, r7, r11 ; l[3|3] + a[3|1] - [tl|tl] |
| |
| add r12, r1, r2, lsl #8 ; [3|2|1|0] |
| |
| usat16 r4, #8, r4 |
| usat16 r5, #8, r5 |
| |
| str r12, [r3], r0 |
| |
| add r12, r4, r5, lsl #8 ; [3|2|1|0] |
| str r12, [r3], r0 |
| |
| pop {r4-r12, pc} |
| |
| b_ve_pred |
| ldr r8, [r0, -r1]! ; a[3|2|1|0] |
| ldr r11, c00FF00FF |
| ldrb r9, [r0, #-1] ; top_left |
| ldrb r10, [r0, #4] ; a[4] |
| |
| ldr r0, c00020002 |
| |
| uxtb16 r4, r8 ; a[2|0] |
| uxtb16 r5, r8, ror #8 ; a[3|1] |
| ldr r2, [sp, #40] ; stride |
| pkhbt r9, r9, r5, lsl #16 ; a[1|-1] |
| |
| add r9, r9, r4, lsl #1 ;[a[1]+2*a[2] | tl+2*a[0] ] |
| uxtab16 r9, r9, r5 ;[a[1]+2*a[2]+a[3] | tl+2*a[0]+a[1] ] |
| uxtab16 r9, r9, r0 ;[a[1]+2*a[2]+a[3]+2| tl+2*a[0]+a[1]+2] |
| |
| add r0, r0, r10, lsl #16 ;[a[4]+2 | 2] |
| add r0, r0, r4, asr #16 ;[a[4]+2 | a[2]+2] |
| add r0, r0, r5, lsl #1 ;[a[4]+2*a[3]+2 | a[2]+2*a[1]+2] |
| uadd16 r4, r4, r0 ;[a[4]+2*a[3]+a[2]+2|a[2]+2*a[1]+a[0]+2] |
| |
| and r9, r11, r9, asr #2 |
| and r4, r11, r4, asr #2 |
| add r3, r3, r2 ; dst + dst_stride |
| add r9, r9, r4, lsl #8 |
| |
| ; store values |
| str r9, [r3, -r2] |
| str r9, [r3] |
| str r9, [r3, r2] |
| str r9, [r3, r2, lsl #1] |
| |
| pop {r4-r12, pc} |
| |
| |
| b_he_pred |
| sub r10, r0, #1 ; Left |
| ldrb r4, [r0, #-1]! ; Left[0] |
| ldrb r8, [r10, -r1] ; top_left |
| ldrb r5, [r10, r1]! ; Left[1] |
| ldrb r6, [r0, r1, lsl #1] ; Left[2] |
| ldrb r7, [r10, r1, lsl #1] ; Left[3] |
| |
| add r8, r8, r4 ; tl + l[0] |
| add r9, r4, r5 ; l[0] + l[1] |
| add r10, r5, r6 ; l[1] + l[2] |
| add r11, r6, r7 ; l[2] + l[3] |
| |
| mov r0, #2<<14 |
| |
| add r8, r8, r9 ; tl + 2*l[0] + l[1] |
| add r4, r9, r10 ; l[0] + 2*l[1] + l[2] |
| add r5, r10, r11 ; l[1] + 2*l[2] + l[3] |
| add r6, r11, r7, lsl #1 ; l[2] + 2*l[3] + l[3] |
| |
| |
| add r8, r0, r8, lsl #14 ; (tl + 2*l[0] + l[1])>>2 in top half |
| add r9, r0, r4, lsl #14 ; (l[0] + 2*l[1] + l[2])>>2 in top half |
| add r10,r0, r5, lsl #14 ; (l[1] + 2*l[2] + l[3])>>2 in top half |
| add r11,r0, r6, lsl #14 ; (l[2] + 2*l[3] + l[3])>>2 in top half |
| |
| pkhtb r8, r8, r8, asr #16 ; l[-|0|-|0] |
| pkhtb r9, r9, r9, asr #16 ; l[-|1|-|1] |
| pkhtb r10, r10, r10, asr #16 ; l[-|2|-|2] |
| pkhtb r11, r11, r11, asr #16 ; l[-|3|-|3] |
| |
| ldr r0, [sp, #40] ; stride |
| |
| add r8, r8, r8, lsl #8 ; l[0|0|0|0] |
| add r9, r9, r9, lsl #8 ; l[1|1|1|1] |
| add r10, r10, r10, lsl #8 ; l[2|2|2|2] |
| add r11, r11, r11, lsl #8 ; l[3|3|3|3] |
| |
| ; store values |
| str r8, [r3], r0 |
| str r9, [r3] |
| str r10, [r3, r0] |
| str r11, [r3, r0, lsl #1] |
| |
| pop {r4-r12, pc} |
| |
| b_ld_pred |
| ldr r4, [r0, -r1]! ; Above |
| ldr r12, c00020002 |
| ldr r5, [r0, #4] |
| ldr lr, c00FF00FF |
| |
| uxtb16 r6, r4 ; a[2|0] |
| uxtb16 r7, r4, ror #8 ; a[3|1] |
| uxtb16 r8, r5 ; a[6|4] |
| uxtb16 r9, r5, ror #8 ; a[7|5] |
| pkhtb r10, r6, r8 ; a[2|4] |
| pkhtb r11, r7, r9 ; a[3|5] |
| |
| |
| add r4, r6, r7, lsl #1 ; [a2+2*a3 | a0+2*a1] |
| add r4, r4, r10, ror #16 ; [a2+2*a3+a4 | a0+2*a1+a2] |
| uxtab16 r4, r4, r12 ; [a2+2*a3+a4+2 | a0+2*a1+a2+2] |
| |
| add r5, r7, r10, ror #15 ; [a3+2*a4 | a1+2*a2] |
| add r5, r5, r11, ror #16 ; [a3+2*a4+a5 | a1+2*a2+a3] |
| uxtab16 r5, r5, r12 ; [a3+2*a4+a5+2 | a1+2*a2+a3+2] |
| |
| pkhtb r7, r9, r8, asr #16 |
| add r6, r8, r9, lsl #1 ; [a6+2*a7 | a4+2*a5] |
| uadd16 r6, r6, r7 ; [a6+2*a7+a7 | a4+2*a5+a6] |
| uxtab16 r6, r6, r12 ; [a6+2*a7+a7+2 | a4+2*a5+a6+2] |
| |
| uxth r7, r9 ; [ a5] |
| add r7, r7, r8, asr #15 ; [ a5+2*a6] |
| add r7, r7, r9, asr #16 ; [ a5+2*a6+a7] |
| uxtah r7, r7, r12 ; [ a5+2*a6+a7+2] |
| |
| ldr r0, [sp, #40] ; stride |
| |
| ; scale down |
| and r4, lr, r4, asr #2 |
| and r5, lr, r5, asr #2 |
| and r6, lr, r6, asr #2 |
| mov r7, r7, asr #2 |
| |
| add r8, r4, r5, lsl #8 ; [3|2|1|0] |
| str r8, [r3], r0 |
| |
| mov r9, r8, lsr #8 |
| add r9, r9, r6, lsl #24 ; [4|3|2|1] |
| str r9, [r3], r0 |
| |
| mov r10, r9, lsr #8 |
| add r10, r10, r7, lsl #24 ; [5|4|3|2] |
| str r10, [r3], r0 |
| |
| mov r6, r6, lsr #16 |
| mov r11, r10, lsr #8 |
| add r11, r11, r6, lsl #24 ; [6|5|4|3] |
| str r11, [r3], r0 |
| |
| pop {r4-r12, pc} |
| |
| b_rd_pred |
| sub r12, r0, r1 ; Above = src - src_stride |
| ldrb r7, [r0, #-1]! ; l[0] = pp[3] |
| ldr lr, [r12] ; Above = pp[8|7|6|5] |
| ldrb r8, [r12, #-1]! ; tl = pp[4] |
| ldrb r6, [r12, r1, lsl #1] ; l[1] = pp[2] |
| ldrb r5, [r0, r1, lsl #1] ; l[2] = pp[1] |
| ldrb r4, [r12, r1, lsl #2] ; l[3] = pp[0] |
| |
| |
| uxtb16 r9, lr ; p[7|5] |
| uxtb16 r10, lr, ror #8 ; p[8|6] |
| add r4, r4, r6, lsl #16 ; p[2|0] |
| add r5, r5, r7, lsl #16 ; p[3|1] |
| add r6, r6, r8, lsl #16 ; p[4|2] |
| pkhbt r7, r7, r9, lsl #16 ; p[5|3] |
| pkhbt r8, r8, r10, lsl #16 ; p[6|4] |
| |
| ldr r12, c00020002 |
| ldr lr, c00FF00FF |
| |
| add r4, r4, r5, lsl #1 ; [p2+2*p3 | p0+2*p1] |
| add r4, r4, r6 ; [p2+2*p3+p4 | p0+2*p1+p2] |
| uxtab16 r4, r4, r12 ; [p2+2*p3+p4+2 | p0+2*p1+p2+2] |
| |
| add r5, r5, r6, lsl #1 ; [p3+2*p4 | p1+2*p2] |
| add r5, r5, r7 ; [p3+2*p4+p5 | p1+2*p2+p3] |
| uxtab16 r5, r5, r12 ; [p3+2*p4+p5+2 | p1+2*p2+p3+2] |
| |
| add r6, r7, r8, lsl #1 ; [p5+2*p6 | p3+2*p4] |
| add r6, r6, r9 ; [p5+2*p6+p7 | p3+2*p4+p5] |
| uxtab16 r6, r6, r12 ; [p5+2*p6+p7+2 | p3+2*p4+p5+2] |
| |
| add r7, r8, r9, lsl #1 ; [p6+2*p7 | p4+2*p5] |
| add r7, r7, r10 ; [p6+2*p7+p8 | p4+2*p5+p6] |
| uxtab16 r7, r7, r12 ; [p6+2*p7+p8+2 | p4+2*p5+p6+2] |
| |
| ldr r0, [sp, #40] ; stride |
| |
| ; scale down |
| and r7, lr, r7, asr #2 |
| and r6, lr, r6, asr #2 |
| and r5, lr, r5, asr #2 |
| and r4, lr, r4, asr #2 |
| |
| add r8, r6, r7, lsl #8 ; [6|5|4|3] |
| str r8, [r3], r0 |
| |
| mov r9, r8, lsl #8 ; [5|4|3|-] |
| uxtab r9, r9, r4, ror #16 ; [5|4|3|2] |
| str r9, [r3], r0 |
| |
| mov r10, r9, lsl #8 ; [4|3|2|-] |
| uxtab r10, r10, r5 ; [4|3|2|1] |
| str r10, [r3], r0 |
| |
| mov r11, r10, lsl #8 ; [3|2|1|-] |
| uxtab r11, r11, r4 ; [3|2|1|0] |
| str r11, [r3], r0 |
| |
| pop {r4-r12, pc} |
| |
| b_vr_pred |
| sub r12, r0, r1 ; Above = src - src_stride |
| ldrb r7, [r0, #-1]! ; l[0] = pp[3] |
| ldr lr, [r12] ; Above = pp[8|7|6|5] |
| ldrb r8, [r12, #-1]! ; tl = pp[4] |
| ldrb r6, [r12, r1, lsl #1] ; l[1] = pp[2] |
| ldrb r5, [r0, r1, lsl #1] ; l[2] = pp[1] |
| ldrb r4, [r12, r1, lsl #2] ; l[3] = pp[0] |
| |
| add r5, r5, r7, lsl #16 ; p[3|1] |
| add r6, r6, r8, lsl #16 ; p[4|2] |
| uxtb16 r9, lr ; p[7|5] |
| uxtb16 r10, lr, ror #8 ; p[8|6] |
| pkhbt r7, r7, r9, lsl #16 ; p[5|3] |
| pkhbt r8, r8, r10, lsl #16 ; p[6|4] |
| |
| ldr r4, c00010001 |
| ldr r12, c00020002 |
| ldr lr, c00FF00FF |
| |
| add r5, r5, r6, lsl #1 ; [p3+2*p4 | p1+2*p2] |
| add r5, r5, r7 ; [p3+2*p4+p5 | p1+2*p2+p3] |
| uxtab16 r5, r5, r12 ; [p3+2*p4+p5+2 | p1+2*p2+p3+2] |
| |
| add r6, r6, r7, lsl #1 ; [p4+2*p5 | p2+2*p3] |
| add r6, r6, r8 ; [p4+2*p5+p6 | p2+2*p3+p4] |
| uxtab16 r6, r6, r12 ; [p4+2*p5+p6+2 | p2+2*p3+p4+2] |
| |
| uadd16 r11, r8, r9 ; [p6+p7 | p4+p5] |
| uhadd16 r11, r11, r4 ; [(p6+p7+1)>>1 | (p4+p5+1)>>1] |
| ; [F|E] |
| |
| add r7, r7, r8, lsl #1 ; [p5+2*p6 | p3+2*p4] |
| add r7, r7, r9 ; [p5+2*p6+p7 | p3+2*p4+p5] |
| uxtab16 r7, r7, r12 ; [p5+2*p6+p7+2 | p3+2*p4+p5+2] |
| |
| uadd16 r2, r9, r10 ; [p7+p8 | p5+p6] |
| uhadd16 r2, r2, r4 ; [(p7+p8+1)>>1 | (p5+p6+1)>>1] |
| ; [J|I] |
| |
| add r8, r8, r9, lsl #1 ; [p6+2*p7 | p4+2*p5] |
| add r8, r8, r10 ; [p6+2*p7+p8 | p4+2*p5+p6] |
| uxtab16 r8, r8, r12 ; [p6+2*p7+p8+2 | p4+2*p5+p6+2] |
| |
| ldr r0, [sp, #40] ; stride |
| |
| ; scale down |
| and r5, lr, r5, asr #2 ; [B|A] |
| and r6, lr, r6, asr #2 ; [D|C] |
| and r7, lr, r7, asr #2 ; [H|G] |
| and r8, lr, r8, asr #2 ; [L|K] |
| |
| add r12, r11, r2, lsl #8 ; [J|F|I|E] |
| str r12, [r3], r0 |
| |
| add r12, r7, r8, lsl #8 ; [L|H|K|G] |
| str r12, [r3], r0 |
| |
| pkhbt r2, r6, r2, lsl #16 ; [-|I|-|C] |
| add r2, r2, r11, lsl #8 ; [F|I|E|C] |
| |
| pkhtb r12, r6, r5 ; [-|D|-|A] |
| pkhtb r10, r7, r5, asr #16 ; [-|H|-|B] |
| str r2, [r3], r0 |
| add r12, r12, r10, lsl #8 ; [H|D|B|A] |
| str r12, [r3], r0 |
| |
| pop {r4-r12, pc} |
| |
| b_vl_pred |
| ldr r4, [r0, -r1]! ; [3|2|1|0] |
| ldr r12, c00020002 |
| ldr r5, [r0, #4] ; [7|6|5|4] |
| ldr lr, c00FF00FF |
| ldr r2, c00010001 |
| |
| mov r0, r4, lsr #16 ; [-|-|3|2] |
| add r0, r0, r5, lsl #16 ; [5|4|3|2] |
| uxtb16 r6, r4 ; [2|0] |
| uxtb16 r7, r4, ror #8 ; [3|1] |
| uxtb16 r8, r0 ; [4|2] |
| uxtb16 r9, r0, ror #8 ; [5|3] |
| uxtb16 r10, r5 ; [6|4] |
| uxtb16 r11, r5, ror #8 ; [7|5] |
| |
| uadd16 r4, r6, r7 ; [p2+p3 | p0+p1] |
| uhadd16 r4, r4, r2 ; [(p2+p3+1)>>1 | (p0+p1+1)>>1] |
| ; [B|A] |
| |
| add r5, r6, r7, lsl #1 ; [p2+2*p3 | p0+2*p1] |
| add r5, r5, r8 ; [p2+2*p3+p4 | p0+2*p1+p2] |
| uxtab16 r5, r5, r12 ; [p2+2*p3+p4+2 | p0+2*p1+p2+2] |
| |
| uadd16 r6, r7, r8 ; [p3+p4 | p1+p2] |
| uhadd16 r6, r6, r2 ; [(p3+p4+1)>>1 | (p1+p2+1)>>1] |
| ; [F|E] |
| |
| add r7, r7, r8, lsl #1 ; [p3+2*p4 | p1+2*p2] |
| add r7, r7, r9 ; [p3+2*p4+p5 | p1+2*p2+p3] |
| uxtab16 r7, r7, r12 ; [p3+2*p4+p5+2 | p1+2*p2+p3+2] |
| |
| add r8, r8, r9, lsl #1 ; [p4+2*p5 | p2+2*p3] |
| add r8, r8, r10 ; [p4+2*p5+p6 | p2+2*p3+p4] |
| uxtab16 r8, r8, r12 ; [p4+2*p5+p6+2 | p2+2*p3+p4+2] |
| |
| add r9, r9, r10, lsl #1 ; [p5+2*p6 | p3+2*p4] |
| add r9, r9, r11 ; [p5+2*p6+p7 | p3+2*p4+p5] |
| uxtab16 r9, r9, r12 ; [p5+2*p6+p7+2 | p3+2*p4+p5+2] |
| |
| ldr r0, [sp, #40] ; stride |
| |
| ; scale down |
| and r5, lr, r5, asr #2 ; [D|C] |
| and r7, lr, r7, asr #2 ; [H|G] |
| and r8, lr, r8, asr #2 ; [I|D] |
| and r9, lr, r9, asr #2 ; [J|H] |
| |
| |
| add r10, r4, r6, lsl #8 ; [F|B|E|A] |
| str r10, [r3], r0 |
| |
| add r5, r5, r7, lsl #8 ; [H|C|G|D] |
| str r5, [r3], r0 |
| |
| pkhtb r12, r8, r4, asr #16 ; [-|I|-|B] |
| pkhtb r10, r9, r8 ; [-|J|-|D] |
| |
| add r12, r6, r12, lsl #8 ; [I|F|B|E] |
| str r12, [r3], r0 |
| |
| add r10, r7, r10, lsl #8 ; [J|H|D|G] |
| str r10, [r3], r0 |
| |
| pop {r4-r12, pc} |
| |
| b_hd_pred |
| sub r12, r0, r1 ; Above = src - src_stride |
| ldrb r7, [r0, #-1]! ; l[0] = pp[3] |
| ldr lr, [r12] ; Above = pp[8|7|6|5] |
| ldrb r8, [r12, #-1]! ; tl = pp[4] |
| ldrb r6, [r0, r1] ; l[1] = pp[2] |
| ldrb r5, [r0, r1, lsl #1] ; l[2] = pp[1] |
| ldrb r4, [r12, r1, lsl #2] ; l[3] = pp[0] |
| |
| uxtb16 r9, lr ; p[7|5] |
| uxtb16 r10, lr, ror #8 ; p[8|6] |
| |
| add r4, r4, r5, lsl #16 ; p[1|0] |
| add r5, r5, r6, lsl #16 ; p[2|1] |
| add r6, r6, r7, lsl #16 ; p[3|2] |
| add r7, r7, r8, lsl #16 ; p[4|3] |
| |
| ldr r12, c00020002 |
| ldr lr, c00FF00FF |
| ldr r2, c00010001 |
| |
| pkhtb r8, r7, r9 ; p[4|5] |
| pkhtb r1, r9, r10 ; p[7|6] |
| pkhbt r10, r8, r10, lsl #16 ; p[6|5] |
| |
| |
| uadd16 r11, r4, r5 ; [p1+p2 | p0+p1] |
| uhadd16 r11, r11, r2 ; [(p1+p2+1)>>1 | (p0+p1+1)>>1] |
| ; [B|A] |
| |
| add r4, r4, r5, lsl #1 ; [p1+2*p2 | p0+2*p1] |
| add r4, r4, r6 ; [p1+2*p2+p3 | p0+2*p1+p2] |
| uxtab16 r4, r4, r12 ; [p1+2*p2+p3+2 | p0+2*p1+p2+2] |
| |
| uadd16 r0, r6, r7 ; [p3+p4 | p2+p3] |
| uhadd16 r0, r0, r2 ; [(p3+p4+1)>>1 | (p2+p3+1)>>1] |
| ; [F|E] |
| |
| add r5, r6, r7, lsl #1 ; [p3+2*p4 | p2+2*p3] |
| add r5, r5, r8, ror #16 ; [p3+2*p4+p5 | p2+2*p3+p4] |
| uxtab16 r5, r5, r12 ; [p3+2*p4+p5+2 | p2+2*p3+p4+2] |
| |
| add r6, r12, r8, ror #16 ; [p5+2 | p4+2] |
| add r6, r6, r10, lsl #1 ; [p5+2+2*p6 | p4+2+2*p5] |
| uxtab16 r6, r6, r1 ; [p5+2+2*p6+p7 | p4+2+2*p5+p6] |
| |
| ; scale down |
| and r4, lr, r4, asr #2 ; [D|C] |
| and r5, lr, r5, asr #2 ; [H|G] |
| and r6, lr, r6, asr #2 ; [J|I] |
| |
| ldr lr, [sp, #40] ; stride |
| |
| pkhtb r2, r0, r6 ; [-|F|-|I] |
| pkhtb r12, r6, r5, asr #16 ; [-|J|-|H] |
| add r12, r12, r2, lsl #8 ; [F|J|I|H] |
| add r2, r0, r5, lsl #8 ; [H|F|G|E] |
| mov r12, r12, ror #24 ; [J|I|H|F] |
| str r12, [r3], lr |
| |
| |
| mov r7, r11, asr #16 ; [-|-|-|B] |
| str r2, [r3], lr |
| add r7, r7, r0, lsl #16 ; [-|E|-|B] |
| add r7, r7, r4, asr #8 ; [-|E|D|B] |
| add r7, r7, r5, lsl #24 ; [G|E|D|B] |
| str r7, [r3], lr |
| |
| add r5, r11, r4, lsl #8 ; [D|B|C|A] |
| str r5, [r3], lr |
| |
| pop {r4-r12, pc} |
| |
| |
| |
| b_hu_pred |
| ldrb r4, [r0, #-1]! ; Left[0] |
| ldr r12, c00020002 |
| ldrb r5, [r0, r1]! ; Left[1] |
| ldr lr, c00FF00FF |
| ldrb r6, [r0, r1]! ; Left[2] |
| ldr r2, c00010001 |
| ldrb r7, [r0, r1] ; Left[3] |
| |
| |
| add r4, r4, r5, lsl #16 ; [1|0] |
| add r5, r5, r6, lsl #16 ; [2|1] |
| add r9, r6, r7, lsl #16 ; [3|2] |
| |
| uadd16 r8, r4, r5 ; [p1+p2 | p0+p1] |
| uhadd16 r8, r8, r2 ; [(p1+p2+1)>>1 | (p0+p1+1)>>1] |
| ; [B|A] |
| |
| add r4, r4, r5, lsl #1 ; [p1+2*p2 | p0+2*p1] |
| add r4, r4, r9 ; [p1+2*p2+p3 | p0+2*p1+p2] |
| uxtab16 r4, r4, r12 ; [p1+2*p2+p3+2 | p0+2*p1+p2+2] |
| ldr r2, [sp, #40] ; stride |
| and r4, lr, r4, asr #2 ; [D|C] |
| |
| add r10, r6, r7 ; [p2+p3] |
| add r11, r10, r7, lsl #1 ; [p2+3*p3] |
| add r10, r10, #1 |
| add r11, r11, #2 |
| mov r10, r10, asr #1 ; [E] |
| mov r11, r11, asr #2 ; [F] |
| |
| add r9, r7, r9, asr #8 ; [-|-|G|G] |
| add r0, r8, r4, lsl #8 ; [D|B|C|A] |
| add r7, r9, r9, lsl #16 ; [G|G|G|G] |
| |
| str r0, [r3], r2 |
| |
| mov r1, r8, asr #16 ; [-|-|-|B] |
| add r1, r1, r4, asr #8 ; [-|-|D|B] |
| add r1, r1, r10, lsl #16 ; [-|E|D|B] |
| add r1, r1, r11, lsl #24 ; [F|E|D|B] |
| str r1, [r3], r2 |
| |
| add r10, r11, lsl #8 ; [-|-|F|E] |
| add r10, r10, r9, lsl #16 ; [G|G|F|E] |
| str r10, [r3] |
| |
| str r7, [r3, r2] |
| |
| pop {r4-r12, pc} |
| |
| ENDP |
| |
| ; constants |
| c00010001 |
| DCD 0x00010001 |
| c00020002 |
| DCD 0x00020002 |
| c00FF00FF |
| DCD 0x00FF00FF |
| |
| END |
