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media/libvpx/vp9/common/arm/neon/vp9_avg_neon.asm@ac0c01689b40 (annotated)

media/libvpx/vp9/common/arm/neon/vp9_avg_neon.asm

Thu, 15 Jan 2015 15:59:08 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 15 Jan 2015 15:59:08 +0100

branch

TOR_BUG_9701

changeset 10

ac0c01689b40

permissions

-rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0	1	;
michael@0	2	; Copyright (c) 2013 The WebM project authors. All Rights Reserved.
michael@0	3	;
michael@0	4	; Use of this source code is governed by a BSD-style license
michael@0	5	; that can be found in the LICENSE file in the root of the source
michael@0	6	; tree. An additional intellectual property rights grant can be found
michael@0	7	; in the file PATENTS. All contributing project authors may
michael@0	8	; be found in the AUTHORS file in the root of the source tree.
michael@0	9	;
michael@0	10
michael@0	11	EXPORT |vp9_convolve_avg_neon|
michael@0	12	ARM
michael@0	13	REQUIRE8
michael@0	14	PRESERVE8
michael@0	15
michael@0	16	AREA ||.text||, CODE, READONLY, ALIGN=2
michael@0	17
michael@0	18	|vp9_convolve_avg_neon| PROC
michael@0	19	push {r4-r6, lr}
michael@0	20	ldrd r4, r5, [sp, #32]
michael@0	21	mov r6, r2
michael@0	22
michael@0	23	cmp r4, #32
michael@0	24	bgt avg64
michael@0	25	beq avg32
michael@0	26	cmp r4, #8
michael@0	27	bgt avg16
michael@0	28	beq avg8
michael@0	29	b avg4
michael@0	30
michael@0	31	avg64
michael@0	32	sub lr, r1, #32
michael@0	33	sub r4, r3, #32
michael@0	34	avg64_h
michael@0	35	pld [r0, r1, lsl #1]
michael@0	36	vld1.8 {q0-q1}, [r0]!
michael@0	37	vld1.8 {q2-q3}, [r0], lr
michael@0	38	pld [r2, r3]
michael@0	39	vld1.8 {q8-q9}, [r6@128]!
michael@0	40	vld1.8 {q10-q11}, [r6@128], r4
michael@0	41	vrhadd.u8 q0, q0, q8
michael@0	42	vrhadd.u8 q1, q1, q9
michael@0	43	vrhadd.u8 q2, q2, q10
michael@0	44	vrhadd.u8 q3, q3, q11
michael@0	45	vst1.8 {q0-q1}, [r2@128]!
michael@0	46	vst1.8 {q2-q3}, [r2@128], r4
michael@0	47	subs r5, r5, #1
michael@0	48	bgt avg64_h
michael@0	49	pop {r4-r6, pc}
michael@0	50
michael@0	51	avg32
michael@0	52	vld1.8 {q0-q1}, [r0], r1
michael@0	53	vld1.8 {q2-q3}, [r0], r1
michael@0	54	vld1.8 {q8-q9}, [r6@128], r3
michael@0	55	vld1.8 {q10-q11}, [r6@128], r3
michael@0	56	pld [r0]
michael@0	57	vrhadd.u8 q0, q0, q8
michael@0	58	pld [r0, r1]
michael@0	59	vrhadd.u8 q1, q1, q9
michael@0	60	pld [r6]
michael@0	61	vrhadd.u8 q2, q2, q10
michael@0	62	pld [r6, r3]
michael@0	63	vrhadd.u8 q3, q3, q11
michael@0	64	vst1.8 {q0-q1}, [r2@128], r3
michael@0	65	vst1.8 {q2-q3}, [r2@128], r3
michael@0	66	subs r5, r5, #2
michael@0	67	bgt avg32
michael@0	68	pop {r4-r6, pc}
michael@0	69
michael@0	70	avg16
michael@0	71	vld1.8 {q0}, [r0], r1
michael@0	72	vld1.8 {q1}, [r0], r1
michael@0	73	vld1.8 {q2}, [r6@128], r3
michael@0	74	vld1.8 {q3}, [r6@128], r3
michael@0	75	pld [r0]
michael@0	76	pld [r0, r1]
michael@0	77	vrhadd.u8 q0, q0, q2
michael@0	78	pld [r6]
michael@0	79	pld [r6, r3]
michael@0	80	vrhadd.u8 q1, q1, q3
michael@0	81	vst1.8 {q0}, [r2@128], r3
michael@0	82	vst1.8 {q1}, [r2@128], r3
michael@0	83	subs r5, r5, #2
michael@0	84	bgt avg16
michael@0	85	pop {r4-r6, pc}
michael@0	86
michael@0	87	avg8
michael@0	88	vld1.8 {d0}, [r0], r1
michael@0	89	vld1.8 {d1}, [r0], r1
michael@0	90	vld1.8 {d2}, [r6@64], r3
michael@0	91	vld1.8 {d3}, [r6@64], r3
michael@0	92	pld [r0]
michael@0	93	pld [r0, r1]
michael@0	94	vrhadd.u8 q0, q0, q1
michael@0	95	pld [r6]
michael@0	96	pld [r6, r3]
michael@0	97	vst1.8 {d0}, [r2@64], r3
michael@0	98	vst1.8 {d1}, [r2@64], r3
michael@0	99	subs r5, r5, #2
michael@0	100	bgt avg8
michael@0	101	pop {r4-r6, pc}
michael@0	102
michael@0	103	avg4
michael@0	104	vld1.32 {d0[0]}, [r0], r1
michael@0	105	vld1.32 {d0[1]}, [r0], r1
michael@0	106	vld1.32 {d2[0]}, [r6@32], r3
michael@0	107	vld1.32 {d2[1]}, [r6@32], r3
michael@0	108	vrhadd.u8 d0, d0, d2
michael@0	109	vst1.32 {d0[0]}, [r2@32], r3
michael@0	110	vst1.32 {d0[1]}, [r2@32], r3
michael@0	111	subs r5, r5, #2
michael@0	112	bgt avg4
michael@0	113	pop {r4-r6, pc}
michael@0	114	ENDP
michael@0	115
michael@0	116	END