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Diffstat (limited to 'media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm')
-rw-r--r-- | media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm | 611 |
1 files changed, 611 insertions, 0 deletions
diff --git a/media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm b/media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm new file mode 100644 index 000000000..c5ec824b3 --- /dev/null +++ b/media/libvpx/vp8/common/arm/armv6/intra4x4_predict_v6.asm @@ -0,0 +1,611 @@ +; +; 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_armv6(unsigned char *Above, unsigned char *yleft, +; B_PREDICTION_MODE left_stride, int b_mode, +; unsigned char *dst, int dst_stride, +; unsigned char top_left) + +; r0: *Above +; r1: *yleft +; r2: left_stride +; r3: b_mode +; sp + #40: dst +; sp + #44: dst_stride +; sp + #48: top_left +|vp8_intra4x4_predict_armv6| PROC + push {r4-r12, lr} + + cmp r3, #10 + addlt pc, pc, r3, 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] ; Above + ldrb r4, [r1], r2 ; Left[0] + mov r9, #0 + ldrb r5, [r1], r2 ; Left[1] + ldrb r6, [r1], r2 ; Left[2] + usad8 r12, r8, r9 + ldrb r7, [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, #44] ; dst_stride + mov r12, r4, asr #3 ; (expected_dc + 4) >> 3 + + add r12, r12, r12, lsl #8 + ldr r3, [sp, #40] ; dst + add r12, r12, r12, lsl #16 + + ; store values + str r12, [r3], r0 + str r12, [r3], r0 + str r12, [r3], r0 + str r12, [r3] + + pop {r4-r12, pc} + +b_tm_pred + ldr r8, [r0] ; Above + ldrb r9, [sp, #48] ; top_left + ldrb r4, [r1], r2 ; Left[0] + ldrb r5, [r1], r2 ; Left[1] + ldrb r6, [r1], r2 ; Left[2] + ldrb r7, [r1] ; Left[3] + ldr r0, [sp, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + 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] + + pop {r4-r12, pc} + +b_ve_pred + ldr r8, [r0] ; a[3|2|1|0] + ldr r11, c00FF00FF + ldrb r9, [sp, #48] ; 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, #44] ; dst_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] ] + ldr r3, [sp, #40] ; dst + 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 r9, r9, r4, lsl #8 + + ; store values + str r9, [r3], r2 + str r9, [r3], r2 + str r9, [r3], r2 + str r9, [r3] + + pop {r4-r12, pc} + + +b_he_pred + ldrb r4, [r1], r2 ; Left[0] + ldrb r8, [sp, #48] ; top_left + ldrb r5, [r1], r2 ; Left[1] + ldrb r6, [r1], r2 ; Left[2] + ldrb r7, [r1] ; 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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + 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], r0 + str r10, [r3], r0 + str r11, [r3] + + pop {r4-r12, pc} + +b_ld_pred + ldr r4, [r0] ; Above[0-3] + ldr r12, c00020002 + ldr r5, [r0, #4] ; Above[4-7] + 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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + ; 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] + + pop {r4-r12, pc} + +b_rd_pred + ldrb r7, [r1], r2 ; l[0] = pp[3] + ldr lr, [r0] ; Above = pp[8|7|6|5] + ldrb r8, [sp, #48] ; tl = pp[4] + ldrb r6, [r1], r2 ; l[1] = pp[2] + ldrb r5, [r1], r2 ; l[2] = pp[1] + ldrb r4, [r1], r2 ; 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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + ; 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] + + pop {r4-r12, pc} + +b_vr_pred + ldrb r7, [r1], r2 ; l[0] = pp[3] + ldr lr, [r0] ; Above = pp[8|7|6|5] + ldrb r8, [sp, #48] ; tl = pp[4] + ldrb r6, [r1], r2 ; l[1] = pp[2] + ldrb r5, [r1], r2 ; l[2] = pp[1] + ldrb r4, [r1] ; 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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + ; 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] + + pop {r4-r12, pc} + +b_vl_pred + ldr r4, [r0] ; [3|2|1|0] = Above[0-3] + ldr r12, c00020002 + ldr r5, [r0, #4] ; [7|6|5|4] = Above[4-7] + 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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + ; 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] + + pop {r4-r12, pc} + +b_hd_pred + ldrb r7, [r1], r2 ; l[0] = pp[3] + ldr lr, [r0] ; Above = pp[8|7|6|5] + ldrb r8, [sp, #48] ; tl = pp[4] + ldrb r6, [r1], r2 ; l[1] = pp[2] + ldrb r5, [r1], r2 ; l[2] = pp[1] + ldrb r4, [r1] ; 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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + + 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] + + pop {r4-r12, pc} + + + +b_hu_pred + ldrb r4, [r1], r2 ; Left[0] + ldr r12, c00020002 + ldrb r5, [r1], r2 ; Left[1] + ldr lr, c00FF00FF + ldrb r6, [r1], r2 ; Left[2] + ldr r2, c00010001 + ldrb r7, [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, #44] ; dst_stride + ldr r3, [sp, #40] ; dst + 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], r2 + + str r7, [r3] + + pop {r4-r12, pc} + + ENDP + +; constants +c00010001 + DCD 0x00010001 +c00020002 + DCD 0x00020002 +c00FF00FF + DCD 0x00FF00FF + + END |