media/libvpx/vp8/encoder/x86/quantize_ssse3.asm@ac0c01689b40
media/libvpx/vp8/encoder/x86/quantize_ssse3.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 and patent
5 ; grant that can be found in the LICENSE file in the root of the source
6 ; tree. All contributing project authors may be found in the AUTHORS
7 ; file in the root of the source tree.
8 ;
11 %include "vpx_ports/x86_abi_support.asm"
12 %include "vp8_asm_enc_offsets.asm"
15 ; void vp8_fast_quantize_b_ssse3 | arg
16 ; (BLOCK *b, | 0
17 ; BLOCKD *d) | 1
18 ;
20 global sym(vp8_fast_quantize_b_ssse3) PRIVATE
21 sym(vp8_fast_quantize_b_ssse3):
22 push rbp
23 mov rbp, rsp
24 GET_GOT rbx
26 %if ABI_IS_32BIT
27 push rdi
28 push rsi
29 %else
30 %if LIBVPX_YASM_WIN64
31 push rdi
32 push rsi
33 %endif
34 %endif
35 ; end prolog
37 %if ABI_IS_32BIT
38 mov rdi, arg(0) ; BLOCK *b
39 mov rsi, arg(1) ; BLOCKD *d
40 %else
41 %if LIBVPX_YASM_WIN64
42 mov rdi, rcx ; BLOCK *b
43 mov rsi, rdx ; BLOCKD *d
44 %else
45 ;mov rdi, rdi ; BLOCK *b
46 ;mov rsi, rsi ; BLOCKD *d
47 %endif
48 %endif
50 mov rax, [rdi + vp8_block_coeff]
51 mov rcx, [rdi + vp8_block_round]
52 mov rdx, [rdi + vp8_block_quant_fast]
54 ; coeff
55 movdqa xmm0, [rax]
56 movdqa xmm4, [rax + 16]
58 ; round
59 movdqa xmm2, [rcx]
60 movdqa xmm3, [rcx + 16]
62 movdqa xmm1, xmm0
63 movdqa xmm5, xmm4
65 ; sz = z >> 15
66 psraw xmm0, 15
67 psraw xmm4, 15
69 pabsw xmm1, xmm1
70 pabsw xmm5, xmm5
72 paddw xmm1, xmm2
73 paddw xmm5, xmm3
75 ; quant_fast
76 pmulhw xmm1, [rdx]
77 pmulhw xmm5, [rdx + 16]
79 mov rax, [rsi + vp8_blockd_qcoeff]
80 mov rdi, [rsi + vp8_blockd_dequant]
81 mov rcx, [rsi + vp8_blockd_dqcoeff]
83 movdqa xmm2, xmm1 ;store y for getting eob
84 movdqa xmm3, xmm5
86 pxor xmm1, xmm0
87 pxor xmm5, xmm4
88 psubw xmm1, xmm0
89 psubw xmm5, xmm4
91 movdqa [rax], xmm1
92 movdqa [rax + 16], xmm5
94 movdqa xmm0, [rdi]
95 movdqa xmm4, [rdi + 16]
97 pmullw xmm0, xmm1
98 pmullw xmm4, xmm5
99 pxor xmm1, xmm1
101 pcmpgtw xmm2, xmm1 ;calculate eob
102 pcmpgtw xmm3, xmm1
103 packsswb xmm2, xmm3
104 pshufb xmm2, [GLOBAL(zz_shuf)]
106 pmovmskb edx, xmm2
108 movdqa [rcx], xmm0 ;store dqcoeff
109 movdqa [rcx + 16], xmm4 ;store dqcoeff
110 mov rcx, [rsi + vp8_blockd_eob]
112 bsr eax, edx ;count 0
113 add eax, 1
115 cmp edx, 0 ;if all 0, eob=0
116 cmove eax, edx
118 mov BYTE PTR [rcx], al ;store eob
120 ; begin epilog
121 %if ABI_IS_32BIT
122 pop rsi
123 pop rdi
124 %else
125 %if LIBVPX_YASM_WIN64
126 pop rsi
127 pop rdi
128 %endif
129 %endif
131 RESTORE_GOT
132 pop rbp
133 ret
135 SECTION_RODATA
136 align 16
137 zz_shuf:
138 db 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15
