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|
@ This file was created from a .asm file
@ using the ads2gas.pl script.
.syntax unified
@
@ Copyright (c) 2013 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.
@
.global vpx_lpf_horizontal_4_neon
.type vpx_lpf_horizontal_4_neon, function
.global vpx_lpf_vertical_4_neon
.type vpx_lpf_vertical_4_neon, function
.global vpx_lpf_horizontal_4_dual_neon
.type vpx_lpf_horizontal_4_dual_neon, function
.global vpx_lpf_vertical_4_dual_neon
.type vpx_lpf_vertical_4_dual_neon, function
.arm
.text
.p2align 2
@ Currently vpx only works on iterations 8 at a time. The vp8 loop filter
@ works on 16 iterations at a time.
@
@ void vpx_lpf_horizontal_4_neon(uint8_t *s,
@ int p /* pitch */,
@ const uint8_t *blimit,
@ const uint8_t *limit,
@ const uint8_t *thresh)
@
@ r0 uint8_t *s,
@ r1 int p, /* pitch */
@ r2 const uint8_t *blimit,
@ r3 const uint8_t *limit,
@ sp const uint8_t *thresh,
_vpx_lpf_horizontal_4_neon:
vpx_lpf_horizontal_4_neon: @ PROC
push {lr}
vld1.8 {d0[]}, [r2] @ duplicate *blimit
ldr r2, [sp, #4] @ load thresh
add r1, r1, r1 @ double pitch
vld1.8 {d1[]}, [r3] @ duplicate *limit
vld1.8 {d2[]}, [r2] @ duplicate *thresh
sub r2, r0, r1, lsl #1 @ move src pointer down by 4 lines
add r3, r2, r1, lsr #1 @ set to 3 lines down
vld1.u8 {d3}, [r2,:64], r1 @ p3
vld1.u8 {d4}, [r3,:64], r1 @ p2
vld1.u8 {d5}, [r2,:64], r1 @ p1
vld1.u8 {d6}, [r3,:64], r1 @ p0
vld1.u8 {d7}, [r2,:64], r1 @ q0
vld1.u8 {d16}, [r3,:64], r1 @ q1
vld1.u8 {d17}, [r2,:64] @ q2
vld1.u8 {d18}, [r3,:64] @ q3
sub r2, r2, r1, lsl #1
sub r3, r3, r1, lsl #1
bl filter4_8
vst1.u8 {d4}, [r2,:64], r1 @ store op1
vst1.u8 {d5}, [r3,:64], r1 @ store op0
vst1.u8 {d6}, [r2,:64], r1 @ store oq0
vst1.u8 {d7}, [r3,:64], r1 @ store oq1
pop {pc}
.size vpx_lpf_horizontal_4_neon, .-vpx_lpf_horizontal_4_neon @ ENDP @ |vpx_lpf_horizontal_4_neon|
@ Currently vpx only works on iterations 8 at a time. The vp8 loop filter
@ works on 16 iterations at a time.
@
@ void vpx_lpf_vertical_4_neon(uint8_t *s,
@ int p /* pitch */,
@ const uint8_t *blimit,
@ const uint8_t *limit,
@ const uint8_t *thresh)
@
@ r0 uint8_t *s,
@ r1 int p, /* pitch */
@ r2 const uint8_t *blimit,
@ r3 const uint8_t *limit,
@ sp const uint8_t *thresh,
_vpx_lpf_vertical_4_neon:
vpx_lpf_vertical_4_neon: @ PROC
push {lr}
vld1.8 {d0[]}, [r2] @ duplicate *blimit
vld1.8 {d1[]}, [r3] @ duplicate *limit
ldr r3, [sp, #4] @ load thresh
sub r2, r0, #4 @ move s pointer down by 4 columns
vld1.8 {d2[]}, [r3] @ duplicate *thresh
vld1.u8 {d3}, [r2], r1 @ load s data
vld1.u8 {d4}, [r2], r1
vld1.u8 {d5}, [r2], r1
vld1.u8 {d6}, [r2], r1
vld1.u8 {d7}, [r2], r1
vld1.u8 {d16}, [r2], r1
vld1.u8 {d17}, [r2], r1
vld1.u8 {d18}, [r2]
@transpose to 8x16 matrix
vtrn.32 d3, d7
vtrn.32 d4, d16
vtrn.32 d5, d17
vtrn.32 d6, d18
vtrn.16 d3, d5
vtrn.16 d4, d6
vtrn.16 d7, d17
vtrn.16 d16, d18
vtrn.8 d3, d4
vtrn.8 d5, d6
vtrn.8 d7, d16
vtrn.8 d17, d18
bl filter4_8
sub r0, r0, #2
@store op1, op0, oq0, oq1
vst4.8 {d4[0], d5[0], d6[0], d7[0]}, [r0], r1
vst4.8 {d4[1], d5[1], d6[1], d7[1]}, [r0], r1
vst4.8 {d4[2], d5[2], d6[2], d7[2]}, [r0], r1
vst4.8 {d4[3], d5[3], d6[3], d7[3]}, [r0], r1
vst4.8 {d4[4], d5[4], d6[4], d7[4]}, [r0], r1
vst4.8 {d4[5], d5[5], d6[5], d7[5]}, [r0], r1
vst4.8 {d4[6], d5[6], d6[6], d7[6]}, [r0], r1
vst4.8 {d4[7], d5[7], d6[7], d7[7]}, [r0]
pop {pc}
.size vpx_lpf_vertical_4_neon, .-vpx_lpf_vertical_4_neon @ ENDP @ |vpx_lpf_vertical_4_neon|
@ void filter4_8();
@ This is a helper function for the loopfilters. The invidual functions do the
@ necessary load, transpose (if necessary) and store. The function does not use
@ registers d8-d15.
@
@ Inputs:
@ r0-r3, r12 PRESERVE
@ d0 blimit
@ d1 limit
@ d2 thresh
@ d3 p3
@ d4 p2
@ d5 p1
@ d6 p0
@ d7 q0
@ d16 q1
@ d17 q2
@ d18 q3
@
@ Outputs:
@ d4 op1
@ d5 op0
@ d6 oq0
@ d7 oq1
_filter4_8:
filter4_8: @ PROC
@ filter_mask
vabd.u8 d19, d3, d4 @ m1 = abs(p3 - p2)
vabd.u8 d20, d4, d5 @ m2 = abs(p2 - p1)
vabd.u8 d21, d5, d6 @ m3 = abs(p1 - p0)
vabd.u8 d22, d16, d7 @ m4 = abs(q1 - q0)
vabd.u8 d3, d17, d16 @ m5 = abs(q2 - q1)
vabd.u8 d4, d18, d17 @ m6 = abs(q3 - q2)
@ only compare the largest value to limit
vmax.u8 d19, d19, d20 @ m1 = max(m1, m2)
vmax.u8 d20, d21, d22 @ m2 = max(m3, m4)
vabd.u8 d17, d6, d7 @ abs(p0 - q0)
vmax.u8 d3, d3, d4 @ m3 = max(m5, m6)
vmov.u8 d18, #0x80
vmax.u8 d23, d19, d20 @ m1 = max(m1, m2)
@ hevmask
vcgt.u8 d21, d21, d2 @ (abs(p1 - p0) > thresh)*-1
vcgt.u8 d22, d22, d2 @ (abs(q1 - q0) > thresh)*-1
vmax.u8 d23, d23, d3 @ m1 = max(m1, m3)
vabd.u8 d28, d5, d16 @ a = abs(p1 - q1)
vqadd.u8 d17, d17, d17 @ b = abs(p0 - q0) * 2
veor d7, d7, d18 @ qs0
vcge.u8 d23, d1, d23 @ abs(m1) > limit
@ filter() function
@ convert to signed
vshr.u8 d28, d28, #1 @ a = a / 2
veor d6, d6, d18 @ ps0
veor d5, d5, d18 @ ps1
vqadd.u8 d17, d17, d28 @ a = b + a
veor d16, d16, d18 @ qs1
vmov.u8 d19, #3
vsub.s8 d28, d7, d6 @ ( qs0 - ps0)
vcge.u8 d17, d0, d17 @ a > blimit
vqsub.s8 d27, d5, d16 @ filter = clamp(ps1-qs1)
vorr d22, d21, d22 @ hevmask
vmull.s8 q12, d28, d19 @ 3 * ( qs0 - ps0)
vand d27, d27, d22 @ filter &= hev
vand d23, d23, d17 @ filter_mask
vaddw.s8 q12, q12, d27 @ filter + 3 * (qs0 - ps0)
vmov.u8 d17, #4
@ filter = clamp(filter + 3 * ( qs0 - ps0))
vqmovn.s16 d27, q12
vand d27, d27, d23 @ filter &= mask
vqadd.s8 d28, d27, d19 @ filter2 = clamp(filter+3)
vqadd.s8 d27, d27, d17 @ filter1 = clamp(filter+4)
vshr.s8 d28, d28, #3 @ filter2 >>= 3
vshr.s8 d27, d27, #3 @ filter1 >>= 3
vqadd.s8 d19, d6, d28 @ u = clamp(ps0 + filter2)
vqsub.s8 d26, d7, d27 @ u = clamp(qs0 - filter1)
@ outer tap adjustments
vrshr.s8 d27, d27, #1 @ filter = ++filter1 >> 1
veor d6, d26, d18 @ *oq0 = u^0x80
vbic d27, d27, d22 @ filter &= ~hev
vqadd.s8 d21, d5, d27 @ u = clamp(ps1 + filter)
vqsub.s8 d20, d16, d27 @ u = clamp(qs1 - filter)
veor d5, d19, d18 @ *op0 = u^0x80
veor d4, d21, d18 @ *op1 = u^0x80
veor d7, d20, d18 @ *oq1 = u^0x80
bx lr
.size filter4_8, .-filter4_8 @ ENDP @ |filter4_8|
@void vpx_lpf_horizontal_4_dual_neon(uint8_t *s, int p,
@ const uint8_t *blimit0,
@ const uint8_t *limit0,
@ const uint8_t *thresh0,
@ const uint8_t *blimit1,
@ const uint8_t *limit1,
@ const uint8_t *thresh1)
@ r0 uint8_t *s,
@ r1 int p,
@ r2 const uint8_t *blimit0,
@ r3 const uint8_t *limit0,
@ sp const uint8_t *thresh0,
@ sp+4 const uint8_t *blimit1,
@ sp+8 const uint8_t *limit1,
@ sp+12 const uint8_t *thresh1,
_vpx_lpf_horizontal_4_dual_neon:
vpx_lpf_horizontal_4_dual_neon: @ PROC
push {lr}
ldr r12, [sp, #4] @ load thresh0
vld1.8 {d0}, [r2] @ load blimit0 to first half q
vld1.8 {d2}, [r3] @ load limit0 to first half q
add r1, r1, r1 @ double pitch
ldr r2, [sp, #8] @ load blimit1
vld1.8 {d4}, [r12] @ load thresh0 to first half q
ldr r3, [sp, #12] @ load limit1
ldr r12, [sp, #16] @ load thresh1
vld1.8 {d1}, [r2] @ load blimit1 to 2nd half q
sub r2, r0, r1, lsl #1 @ s[-4 * p]
vld1.8 {d3}, [r3] @ load limit1 to 2nd half q
vld1.8 {d5}, [r12] @ load thresh1 to 2nd half q
vpush {d8-d15} @ save neon registers
add r3, r2, r1, lsr #1 @ s[-3 * p]
vld1.u8 {q3}, [r2,:64], r1 @ p3
vld1.u8 {q4}, [r3,:64], r1 @ p2
vld1.u8 {q5}, [r2,:64], r1 @ p1
vld1.u8 {q6}, [r3,:64], r1 @ p0
vld1.u8 {q7}, [r2,:64], r1 @ q0
vld1.u8 {q8}, [r3,:64], r1 @ q1
vld1.u8 {q9}, [r2,:64] @ q2
vld1.u8 {q10}, [r3,:64] @ q3
sub r2, r2, r1, lsl #1
sub r3, r3, r1, lsl #1
bl filter4_16
vst1.u8 {q5}, [r2,:64], r1 @ store op1
vst1.u8 {q6}, [r3,:64], r1 @ store op0
vst1.u8 {q7}, [r2,:64], r1 @ store oq0
vst1.u8 {q8}, [r3,:64], r1 @ store oq1
vpop {d8-d15} @ restore neon registers
pop {pc}
.size vpx_lpf_horizontal_4_dual_neon, .-vpx_lpf_horizontal_4_dual_neon @ ENDP @ |vpx_lpf_horizontal_4_dual_neon|
@void vpx_lpf_vertical_4_dual_neon(uint8_t *s, int p,
@ const uint8_t *blimit0,
@ const uint8_t *limit0,
@ const uint8_t *thresh0,
@ const uint8_t *blimit1,
@ const uint8_t *limit1,
@ const uint8_t *thresh1)
@ r0 uint8_t *s,
@ r1 int p,
@ r2 const uint8_t *blimit0,
@ r3 const uint8_t *limit0,
@ sp const uint8_t *thresh0,
@ sp+4 const uint8_t *blimit1,
@ sp+8 const uint8_t *limit1,
@ sp+12 const uint8_t *thresh1,
_vpx_lpf_vertical_4_dual_neon:
vpx_lpf_vertical_4_dual_neon: @ PROC
push {lr}
ldr r12, [sp, #4] @ load thresh0
vld1.8 {d0}, [r2] @ load blimit0 to first half q
vld1.8 {d2}, [r3] @ load limit0 to first half q
ldr r2, [sp, #8] @ load blimit1
vld1.8 {d4}, [r12] @ load thresh0 to first half q
ldr r3, [sp, #12] @ load limit1
ldr r12, [sp, #16] @ load thresh1
vld1.8 {d1}, [r2] @ load blimit1 to 2nd half q
sub r2, r0, #4 @ s[-4]
vld1.8 {d3}, [r3] @ load limit1 to 2nd half q
vld1.8 {d5}, [r12] @ load thresh1 to 2nd half q
vpush {d8-d15} @ save neon registers
vld1.u8 {d6}, [r2], r1 @ 00 01 02 03 04 05 06 07
vld1.u8 {d8}, [r2], r1 @ 10 11 12 13 14 15 16 17
vld1.u8 {d10}, [r2], r1 @ 20 21 22 23 24 25 26 27
vld1.u8 {d12}, [r2], r1 @ 30 31 32 33 34 35 36 37
vld1.u8 {d14}, [r2], r1 @ 40 41 42 43 44 45 46 47
vld1.u8 {d16}, [r2], r1 @ 50 51 52 53 54 55 56 57
vld1.u8 {d18}, [r2], r1 @ 60 61 62 63 64 65 66 67
vld1.u8 {d20}, [r2], r1 @ 70 71 72 73 74 75 76 77
vld1.u8 {d7}, [r2], r1 @ 80 81 82 83 84 85 86 87
vld1.u8 {d9}, [r2], r1 @ 90 91 92 93 94 95 96 97
vld1.u8 {d11}, [r2], r1 @ A0 A1 A2 A3 A4 A5 A6 A7
vld1.u8 {d13}, [r2], r1 @ B0 B1 B2 B3 B4 B5 B6 B7
vld1.u8 {d15}, [r2], r1 @ C0 C1 C2 C3 C4 C5 C6 C7
vld1.u8 {d17}, [r2], r1 @ D0 D1 D2 D3 D4 D5 D6 D7
vld1.u8 {d19}, [r2], r1 @ E0 E1 E2 E3 E4 E5 E6 E7
vld1.u8 {d21}, [r2] @ F0 F1 F2 F3 F4 F5 F6 F7
vtrn.8 q3, q4 @ q3 : 00 10 02 12 04 14 06 16 80 90 82 92 84 94 86 96
@ q4 : 01 11 03 13 05 15 07 17 81 91 83 93 85 95 87 97
vtrn.8 q5, q6 @ q5 : 20 30 22 32 24 34 26 36 A0 B0 A2 B2 A4 B4 A6 B6
@ q6 : 21 31 23 33 25 35 27 37 A1 B1 A3 B3 A5 B5 A7 B7
vtrn.8 q7, q8 @ q7 : 40 50 42 52 44 54 46 56 C0 D0 C2 D2 C4 D4 C6 D6
@ q8 : 41 51 43 53 45 55 47 57 C1 D1 C3 D3 C5 D5 C7 D7
vtrn.8 q9, q10 @ q9 : 60 70 62 72 64 74 66 76 E0 F0 E2 F2 E4 F4 E6 F6
@ q10: 61 71 63 73 65 75 67 77 E1 F1 E3 F3 E5 F5 E7 F7
vtrn.16 q3, q5 @ q3 : 00 10 20 30 04 14 24 34 80 90 A0 B0 84 94 A4 B4
@ q5 : 02 12 22 32 06 16 26 36 82 92 A2 B2 86 96 A6 B6
vtrn.16 q4, q6 @ q4 : 01 11 21 31 05 15 25 35 81 91 A1 B1 85 95 A5 B5
@ q6 : 03 13 23 33 07 17 27 37 83 93 A3 B3 87 97 A7 B7
vtrn.16 q7, q9 @ q7 : 40 50 60 70 44 54 64 74 C0 D0 E0 F0 C4 D4 E4 F4
@ q9 : 42 52 62 72 46 56 66 76 C2 D2 E2 F2 C6 D6 E6 F6
vtrn.16 q8, q10 @ q8 : 41 51 61 71 45 55 65 75 C1 D1 E1 F1 C5 D5 E5 F5
@ q10: 43 53 63 73 47 57 67 77 C3 D3 E3 F3 C7 D7 E7 F7
vtrn.32 q3, q7 @ q3 : 00 10 20 30 40 50 60 70 80 90 A0 B0 C0 D0 E0 F0
@ q7 : 04 14 24 34 44 54 64 74 84 94 A4 B4 C4 D4 E4 F4
vtrn.32 q5, q9 @ q5 : 02 12 22 32 42 52 62 72 82 92 A2 B2 C2 D2 E2 F2
@ q9 : 06 16 26 36 46 56 66 76 86 96 A6 B6 C6 D6 E6 F6
vtrn.32 q4, q8 @ q4 : 01 11 21 31 41 51 61 71 81 91 A1 B1 C1 D1 E1 F1
@ q8 : 05 15 25 35 45 55 65 75 85 95 A5 B5 C5 D5 E5 F5
vtrn.32 q6, q10 @ q6 : 03 13 23 33 43 53 63 73 83 93 A3 B3 C3 D3 E3 F3
@ q10: 07 17 27 37 47 57 67 77 87 97 A7 B7 C7 D7 E7 F7
bl filter4_16
sub r0, #2
vmov d0, d11
vmov d1, d13
vmov d2, d15
vmov d3, d17
vmov d11, d12
vmov d12, d14
vmov d13, d16
vst4.8 {d10[0], d11[0], d12[0], d13[0]}, [r0], r1
vst4.8 {d10[1], d11[1], d12[1], d13[1]}, [r0], r1
vst4.8 {d10[2], d11[2], d12[2], d13[2]}, [r0], r1
vst4.8 {d10[3], d11[3], d12[3], d13[3]}, [r0], r1
vst4.8 {d10[4], d11[4], d12[4], d13[4]}, [r0], r1
vst4.8 {d10[5], d11[5], d12[5], d13[5]}, [r0], r1
vst4.8 {d10[6], d11[6], d12[6], d13[6]}, [r0], r1
vst4.8 {d10[7], d11[7], d12[7], d13[7]}, [r0], r1
vst4.8 {d0[0], d1[0], d2[0], d3[0]}, [r0], r1
vst4.8 {d0[1], d1[1], d2[1], d3[1]}, [r0], r1
vst4.8 {d0[2], d1[2], d2[2], d3[2]}, [r0], r1
vst4.8 {d0[3], d1[3], d2[3], d3[3]}, [r0], r1
vst4.8 {d0[4], d1[4], d2[4], d3[4]}, [r0], r1
vst4.8 {d0[5], d1[5], d2[5], d3[5]}, [r0], r1
vst4.8 {d0[6], d1[6], d2[6], d3[6]}, [r0], r1
vst4.8 {d0[7], d1[7], d2[7], d3[7]}, [r0]
vpop {d8-d15} @ restore neon registers
pop {pc}
.size vpx_lpf_vertical_4_dual_neon, .-vpx_lpf_vertical_4_dual_neon @ ENDP @ |vpx_lpf_vertical_4_dual_neon|
@ void filter4_16();
@ This is a helper function for the loopfilters. The invidual functions do the
@ necessary load, transpose (if necessary) and store. This function uses
@ registers d8-d15, so the calling function must save those registers.
@
@ r0-r3, r12 PRESERVE
@ q0 blimit
@ q1 limit
@ q2 thresh
@ q3 p3
@ q4 p2
@ q5 p1
@ q6 p0
@ q7 q0
@ q8 q1
@ q9 q2
@ q10 q3
@
@ Outputs:
@ q5 op1
@ q6 op0
@ q7 oq0
@ q8 oq1
_filter4_16:
filter4_16: @ PROC
@ filter_mask
vabd.u8 q11, q3, q4 @ m1 = abs(p3 - p2)
vabd.u8 q12, q4, q5 @ m2 = abs(p2 - p1)
vabd.u8 q13, q5, q6 @ m3 = abs(p1 - p0)
vabd.u8 q14, q8, q7 @ m4 = abs(q1 - q0)
vabd.u8 q3, q9, q8 @ m5 = abs(q2 - q1)
vabd.u8 q4, q10, q9 @ m6 = abs(q3 - q2)
@ only compare the largest value to limit
vmax.u8 q11, q11, q12 @ m7 = max(m1, m2)
vmax.u8 q12, q13, q14 @ m8 = max(m3, m4)
vabd.u8 q9, q6, q7 @ abs(p0 - q0)
vmax.u8 q3, q3, q4 @ m9 = max(m5, m6)
vmov.u8 q10, #0x80
vmax.u8 q15, q11, q12 @ m10 = max(m7, m8)
vcgt.u8 q13, q13, q2 @ (abs(p1 - p0) > thresh)*-1
vcgt.u8 q14, q14, q2 @ (abs(q1 - q0) > thresh)*-1
vmax.u8 q15, q15, q3 @ m11 = max(m10, m9)
vabd.u8 q2, q5, q8 @ a = abs(p1 - q1)
vqadd.u8 q9, q9, q9 @ b = abs(p0 - q0) * 2
veor q7, q7, q10 @ qs0
vcge.u8 q15, q1, q15 @ abs(m11) > limit
vshr.u8 q2, q2, #1 @ a = a / 2
veor q6, q6, q10 @ ps0
veor q5, q5, q10 @ ps1
vqadd.u8 q9, q9, q2 @ a = b + a
veor q8, q8, q10 @ qs1
vmov.u16 q4, #3
vsubl.s8 q2, d14, d12 @ ( qs0 - ps0)
vsubl.s8 q11, d15, d13
vcge.u8 q9, q0, q9 @ a > blimit
vqsub.s8 q1, q5, q8 @ filter = clamp(ps1-qs1)
vorr q14, q13, q14 @ hev
vmul.i16 q2, q2, q4 @ 3 * ( qs0 - ps0)
vmul.i16 q11, q11, q4
vand q1, q1, q14 @ filter &= hev
vand q15, q15, q9 @ mask
vmov.u8 q4, #3
vaddw.s8 q2, q2, d2 @ filter + 3 * (qs0 - ps0)
vaddw.s8 q11, q11, d3
vmov.u8 q9, #4
@ filter = clamp(filter + 3 * ( qs0 - ps0))
vqmovn.s16 d2, q2
vqmovn.s16 d3, q11
vand q1, q1, q15 @ filter &= mask
vqadd.s8 q2, q1, q4 @ filter2 = clamp(filter+3)
vqadd.s8 q1, q1, q9 @ filter1 = clamp(filter+4)
vshr.s8 q2, q2, #3 @ filter2 >>= 3
vshr.s8 q1, q1, #3 @ filter1 >>= 3
vqadd.s8 q11, q6, q2 @ u = clamp(ps0 + filter2)
vqsub.s8 q0, q7, q1 @ u = clamp(qs0 - filter1)
@ outer tap adjustments
vrshr.s8 q1, q1, #1 @ filter = ++filter1 >> 1
veor q7, q0, q10 @ *oq0 = u^0x80
vbic q1, q1, q14 @ filter &= ~hev
vqadd.s8 q13, q5, q1 @ u = clamp(ps1 + filter)
vqsub.s8 q12, q8, q1 @ u = clamp(qs1 - filter)
veor q6, q11, q10 @ *op0 = u^0x80
veor q5, q13, q10 @ *op1 = u^0x80
veor q8, q12, q10 @ *oq1 = u^0x80
bx lr
.size filter4_16, .-filter4_16 @ ENDP @ |filter4_16|
.section .note.GNU-stack,"",%progbits
|
