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media/libvpx/vp8/encoder/x86/quantize_mmx.asm@ac0c01689b40 (annotated)

media/libvpx/vp8/encoder/x86/quantize_mmx.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) 2010 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
michael@0	12	%include "vpx_ports/x86_abi_support.asm"
michael@0	13
michael@0	14	;int vp8_fast_quantize_b_impl_mmx(short *coeff_ptr, short *zbin_ptr,
michael@0	15	; short *qcoeff_ptr,short *dequant_ptr,
michael@0	16	; short *scan_mask, short *round_ptr,
michael@0	17	; short *quant_ptr, short *dqcoeff_ptr);
michael@0	18	global sym(vp8_fast_quantize_b_impl_mmx) PRIVATE
michael@0	19	sym(vp8_fast_quantize_b_impl_mmx):
michael@0	20	push rbp
michael@0	21	mov rbp, rsp
michael@0	22	SHADOW_ARGS_TO_STACK 8
michael@0	23	push rsi
michael@0	24	push rdi
michael@0	25	; end prolog
michael@0	26
michael@0	27
michael@0	28	mov rsi, arg(0) ;coeff_ptr
michael@0	29	movq mm0, [rsi]
michael@0	30
michael@0	31	mov rax, arg(1) ;zbin_ptr
michael@0	32	movq mm1, [rax]
michael@0	33
michael@0	34	movq mm3, mm0
michael@0	35	psraw mm0, 15
michael@0	36
michael@0	37	pxor mm3, mm0
michael@0	38	psubw mm3, mm0 ; abs
michael@0	39
michael@0	40	movq mm2, mm3
michael@0	41	pcmpgtw mm1, mm2
michael@0	42
michael@0	43	pandn mm1, mm2
michael@0	44	movq mm3, mm1
michael@0	45
michael@0	46	mov rdx, arg(6) ;quant_ptr
michael@0	47	movq mm1, [rdx]
michael@0	48
michael@0	49	mov rcx, arg(5) ;round_ptr
michael@0	50	movq mm2, [rcx]
michael@0	51
michael@0	52	paddw mm3, mm2
michael@0	53	pmulhuw mm3, mm1
michael@0	54
michael@0	55	pxor mm3, mm0
michael@0	56	psubw mm3, mm0 ;gain the sign back
michael@0	57
michael@0	58	mov rdi, arg(2) ;qcoeff_ptr
michael@0	59	movq mm0, mm3
michael@0	60
michael@0	61	movq [rdi], mm3
michael@0	62
michael@0	63	mov rax, arg(3) ;dequant_ptr
michael@0	64	movq mm2, [rax]
michael@0	65
michael@0	66	pmullw mm3, mm2
michael@0	67	mov rax, arg(7) ;dqcoeff_ptr
michael@0	68
michael@0	69	movq [rax], mm3
michael@0	70
michael@0	71	; next 8
michael@0	72	movq mm4, [rsi+8]
michael@0	73
michael@0	74	mov rax, arg(1) ;zbin_ptr
michael@0	75	movq mm5, [rax+8]
michael@0	76
michael@0	77	movq mm7, mm4
michael@0	78	psraw mm4, 15
michael@0	79
michael@0	80	pxor mm7, mm4
michael@0	81	psubw mm7, mm4 ; abs
michael@0	82
michael@0	83	movq mm6, mm7
michael@0	84	pcmpgtw mm5, mm6
michael@0	85
michael@0	86	pandn mm5, mm6
michael@0	87	movq mm7, mm5
michael@0	88
michael@0	89	movq mm5, [rdx+8]
michael@0	90	movq mm6, [rcx+8]
michael@0	91
michael@0	92	paddw mm7, mm6
michael@0	93	pmulhuw mm7, mm5
michael@0	94
michael@0	95	pxor mm7, mm4
michael@0	96	psubw mm7, mm4;gain the sign back
michael@0	97
michael@0	98	mov rdi, arg(2) ;qcoeff_ptr
michael@0	99
michael@0	100	movq mm1, mm7
michael@0	101	movq [rdi+8], mm7
michael@0	102
michael@0	103	mov rax, arg(3) ;dequant_ptr
michael@0	104	movq mm6, [rax+8]
michael@0	105
michael@0	106	pmullw mm7, mm6
michael@0	107	mov rax, arg(7) ;dqcoeff_ptr
michael@0	108
michael@0	109	movq [rax+8], mm7
michael@0	110
michael@0	111
michael@0	112	; next 8
michael@0	113	movq mm4, [rsi+16]
michael@0	114
michael@0	115	mov rax, arg(1) ;zbin_ptr
michael@0	116	movq mm5, [rax+16]
michael@0	117
michael@0	118	movq mm7, mm4
michael@0	119	psraw mm4, 15
michael@0	120
michael@0	121	pxor mm7, mm4
michael@0	122	psubw mm7, mm4 ; abs
michael@0	123
michael@0	124	movq mm6, mm7
michael@0	125	pcmpgtw mm5, mm6
michael@0	126
michael@0	127	pandn mm5, mm6
michael@0	128	movq mm7, mm5
michael@0	129
michael@0	130	movq mm5, [rdx+16]
michael@0	131	movq mm6, [rcx+16]
michael@0	132
michael@0	133	paddw mm7, mm6
michael@0	134	pmulhuw mm7, mm5
michael@0	135
michael@0	136	pxor mm7, mm4
michael@0	137	psubw mm7, mm4;gain the sign back
michael@0	138
michael@0	139	mov rdi, arg(2) ;qcoeff_ptr
michael@0	140
michael@0	141	movq mm1, mm7
michael@0	142	movq [rdi+16], mm7
michael@0	143
michael@0	144	mov rax, arg(3) ;dequant_ptr
michael@0	145	movq mm6, [rax+16]
michael@0	146
michael@0	147	pmullw mm7, mm6
michael@0	148	mov rax, arg(7) ;dqcoeff_ptr
michael@0	149
michael@0	150	movq [rax+16], mm7
michael@0	151
michael@0	152
michael@0	153	; next 8
michael@0	154	movq mm4, [rsi+24]
michael@0	155
michael@0	156	mov rax, arg(1) ;zbin_ptr
michael@0	157	movq mm5, [rax+24]
michael@0	158
michael@0	159	movq mm7, mm4
michael@0	160	psraw mm4, 15
michael@0	161
michael@0	162	pxor mm7, mm4
michael@0	163	psubw mm7, mm4 ; abs
michael@0	164
michael@0	165	movq mm6, mm7
michael@0	166	pcmpgtw mm5, mm6
michael@0	167
michael@0	168	pandn mm5, mm6
michael@0	169	movq mm7, mm5
michael@0	170
michael@0	171	movq mm5, [rdx+24]
michael@0	172	movq mm6, [rcx+24]
michael@0	173
michael@0	174	paddw mm7, mm6
michael@0	175	pmulhuw mm7, mm5
michael@0	176
michael@0	177	pxor mm7, mm4
michael@0	178	psubw mm7, mm4;gain the sign back
michael@0	179
michael@0	180	mov rdi, arg(2) ;qcoeff_ptr
michael@0	181
michael@0	182	movq mm1, mm7
michael@0	183	movq [rdi+24], mm7
michael@0	184
michael@0	185	mov rax, arg(3) ;dequant_ptr
michael@0	186	movq mm6, [rax+24]
michael@0	187
michael@0	188	pmullw mm7, mm6
michael@0	189	mov rax, arg(7) ;dqcoeff_ptr
michael@0	190
michael@0	191	movq [rax+24], mm7
michael@0	192
michael@0	193
michael@0	194
michael@0	195	mov rdi, arg(4) ;scan_mask
michael@0	196	mov rsi, arg(2) ;qcoeff_ptr
michael@0	197
michael@0	198	pxor mm5, mm5
michael@0	199	pxor mm7, mm7
michael@0	200
michael@0	201	movq mm0, [rsi]
michael@0	202	movq mm1, [rsi+8]
michael@0	203
michael@0	204	movq mm2, [rdi]
michael@0	205	movq mm3, [rdi+8];
michael@0	206
michael@0	207	pcmpeqw mm0, mm7
michael@0	208	pcmpeqw mm1, mm7
michael@0	209
michael@0	210	pcmpeqw mm6, mm6
michael@0	211	pxor mm0, mm6
michael@0	212
michael@0	213	pxor mm1, mm6
michael@0	214	psrlw mm0, 15
michael@0	215
michael@0	216	psrlw mm1, 15
michael@0	217	pmaddwd mm0, mm2
michael@0	218
michael@0	219	pmaddwd mm1, mm3
michael@0	220	movq mm5, mm0
michael@0	221
michael@0	222	paddd mm5, mm1
michael@0	223
michael@0	224	movq mm0, [rsi+16]
michael@0	225	movq mm1, [rsi+24]
michael@0	226
michael@0	227	movq mm2, [rdi+16]
michael@0	228	movq mm3, [rdi+24];
michael@0	229
michael@0	230	pcmpeqw mm0, mm7
michael@0	231	pcmpeqw mm1, mm7
michael@0	232
michael@0	233	pcmpeqw mm6, mm6
michael@0	234	pxor mm0, mm6
michael@0	235
michael@0	236	pxor mm1, mm6
michael@0	237	psrlw mm0, 15
michael@0	238
michael@0	239	psrlw mm1, 15
michael@0	240	pmaddwd mm0, mm2
michael@0	241
michael@0	242	pmaddwd mm1, mm3
michael@0	243	paddd mm5, mm0
michael@0	244
michael@0	245	paddd mm5, mm1
michael@0	246	movq mm0, mm5
michael@0	247
michael@0	248	psrlq mm5, 32
michael@0	249	paddd mm0, mm5
michael@0	250
michael@0	251	; eob adjustment begins here
michael@0	252	movq rcx, mm0
michael@0	253	and rcx, 0xffff
michael@0	254
michael@0	255	xor rdx, rdx
michael@0	256	sub rdx, rcx ; rdx=-rcx
michael@0	257
michael@0	258	bsr rax, rcx
michael@0	259	inc rax
michael@0	260
michael@0	261	sar rdx, 31
michael@0	262	and rax, rdx
michael@0	263	; Substitute the sse assembly for the old mmx mixed assembly/C. The
michael@0	264	; following is kept as reference
michael@0	265	; movq rcx, mm0
michael@0	266	; bsr rax, rcx
michael@0	267	;
michael@0	268	; mov eob, rax
michael@0	269	; mov eee, rcx
michael@0	270	;
michael@0	271	;if(eee==0)
michael@0	272	;{
michael@0	273	; eob=-1;
michael@0	274	;}
michael@0	275	;else if(eee<0)
michael@0	276	;{
michael@0	277	; eob=15;
michael@0	278	;}
michael@0	279	;d->eob = eob+1;
michael@0	280
michael@0	281	; begin epilog
michael@0	282	pop rdi
michael@0	283	pop rsi
michael@0	284	UNSHADOW_ARGS
michael@0	285	pop rbp
michael@0	286	ret