media/libvpx/vp8/common/x86/iwalsh_sse2.asm@ac0c01689b40
media/libvpx/vp8/common/x86/iwalsh_sse2.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.
1 ;
2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 ;
4 ; Use of this source code is governed by a BSD-style license
5 ; that can be found in the LICENSE file in the root of the source
6 ; tree. An additional intellectual property rights grant can be found
7 ; in the file PATENTS. All contributing project authors may
8 ; be found in the AUTHORS file in the root of the source tree.
9 ;
12 %include "vpx_ports/x86_abi_support.asm"
14 ;void vp8_short_inv_walsh4x4_sse2(short *input, short *output)
15 global sym(vp8_short_inv_walsh4x4_sse2) PRIVATE
16 sym(vp8_short_inv_walsh4x4_sse2):
17 push rbp
18 mov rbp, rsp
19 SHADOW_ARGS_TO_STACK 2
20 ; end prolog
22 mov rcx, arg(0)
23 mov rdx, arg(1)
24 mov rax, 30003h
26 movdqa xmm0, [rcx + 0] ;ip[4] ip[0]
27 movdqa xmm1, [rcx + 16] ;ip[12] ip[8]
30 pshufd xmm2, xmm1, 4eh ;ip[8] ip[12]
31 movdqa xmm3, xmm0 ;ip[4] ip[0]
33 paddw xmm0, xmm2 ;ip[4]+ip[8] ip[0]+ip[12] aka b1 a1
34 psubw xmm3, xmm2 ;ip[4]-ip[8] ip[0]-ip[12] aka c1 d1
36 movdqa xmm4, xmm0
37 punpcklqdq xmm0, xmm3 ;d1 a1
38 punpckhqdq xmm4, xmm3 ;c1 b1
40 movdqa xmm1, xmm4 ;c1 b1
41 paddw xmm4, xmm0 ;dl+cl a1+b1 aka op[4] op[0]
42 psubw xmm0, xmm1 ;d1-c1 a1-b1 aka op[12] op[8]
44 ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
45 ; 13 12 11 10 03 02 01 00
46 ;
47 ; 33 32 31 30 23 22 21 20
48 ;
49 movdqa xmm3, xmm4 ; 13 12 11 10 03 02 01 00
50 punpcklwd xmm4, xmm0 ; 23 03 22 02 21 01 20 00
51 punpckhwd xmm3, xmm0 ; 33 13 32 12 31 11 30 10
52 movdqa xmm1, xmm4 ; 23 03 22 02 21 01 20 00
53 punpcklwd xmm4, xmm3 ; 31 21 11 01 30 20 10 00
54 punpckhwd xmm1, xmm3 ; 33 23 13 03 32 22 12 02
55 ;~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
56 movd xmm0, eax
57 pshufd xmm2, xmm1, 4eh ;ip[8] ip[12]
58 movdqa xmm3, xmm4 ;ip[4] ip[0]
60 pshufd xmm0, xmm0, 0 ;03 03 03 03 03 03 03 03
62 paddw xmm4, xmm2 ;ip[4]+ip[8] ip[0]+ip[12] aka b1 a1
63 psubw xmm3, xmm2 ;ip[4]-ip[8] ip[0]-ip[12] aka c1 d1
65 movdqa xmm5, xmm4
66 punpcklqdq xmm4, xmm3 ;d1 a1
67 punpckhqdq xmm5, xmm3 ;c1 b1
69 movdqa xmm1, xmm5 ;c1 b1
70 paddw xmm5, xmm4 ;dl+cl a1+b1 aka op[4] op[0]
71 psubw xmm4, xmm1 ;d1-c1 a1-b1 aka op[12] op[8]
73 paddw xmm5, xmm0
74 paddw xmm4, xmm0
75 psraw xmm5, 3
76 psraw xmm4, 3
78 movd eax, xmm5
79 movd ecx, xmm4
80 psrldq xmm5, 4
81 psrldq xmm4, 4
82 mov word ptr[rdx+32*0], ax
83 mov word ptr[rdx+32*2], cx
84 shr eax, 16
85 shr ecx, 16
86 mov word ptr[rdx+32*4], ax
87 mov word ptr[rdx+32*6], cx
88 movd eax, xmm5
89 movd ecx, xmm4
90 psrldq xmm5, 4
91 psrldq xmm4, 4
92 mov word ptr[rdx+32*8], ax
93 mov word ptr[rdx+32*10], cx
94 shr eax, 16
95 shr ecx, 16
96 mov word ptr[rdx+32*12], ax
97 mov word ptr[rdx+32*14], cx
99 movd eax, xmm5
100 movd ecx, xmm4
101 psrldq xmm5, 4
102 psrldq xmm4, 4
103 mov word ptr[rdx+32*1], ax
104 mov word ptr[rdx+32*3], cx
105 shr eax, 16
106 shr ecx, 16
107 mov word ptr[rdx+32*5], ax
108 mov word ptr[rdx+32*7], cx
109 movd eax, xmm5
110 movd ecx, xmm4
111 mov word ptr[rdx+32*9], ax
112 mov word ptr[rdx+32*11], cx
113 shr eax, 16
114 shr ecx, 16
115 mov word ptr[rdx+32*13], ax
116 mov word ptr[rdx+32*15], cx
118 ; begin epilog
119 UNSHADOW_ARGS
120 pop rbp
121 ret
