32 |
; * |
; * |
33 |
; * History: |
; * History: |
34 |
; * |
; * |
35 |
|
; * 14.06.2002 some further tweaks by -Skal- |
36 |
; * 24.11.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
; * 24.11.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
37 |
; * |
; * |
38 |
; *************************************************************************/ |
; *************************************************************************/ |
51 |
%endif |
%endif |
52 |
%endmacro |
%endmacro |
53 |
|
|
54 |
ignore_dc dw 0, -1, -1, -1 |
align 16 |
55 |
|
|
56 |
|
ignore_dc dw 0, -1, -1, -1, -1, -1, -1, -1 |
57 |
|
|
58 |
section .text |
section .text |
59 |
|
|
60 |
|
cglobal calc_cbp_mmx |
61 |
|
|
62 |
;=========================================================================== |
;=========================================================================== |
63 |
; |
; |
66 |
;=========================================================================== |
;=========================================================================== |
67 |
|
|
68 |
align 16 |
align 16 |
69 |
cglobal calc_cbp_mmx |
calc_cbp_mmx: |
|
calc_cbp_mmx |
|
70 |
push ebx |
push ebx |
|
push ecx |
|
|
push edx |
|
71 |
push esi |
push esi |
72 |
|
|
73 |
mov esi, [esp + 16 + 4] ; coeff |
mov esi, [esp + 8 + 4] ; coeff |
74 |
|
xor eax, eax ; cbp = 0 |
75 |
|
mov edx, (1 << 5) |
76 |
|
|
77 |
movq mm7, [ignore_dc] |
movq mm7, [ignore_dc] |
78 |
|
|
|
xor eax, eax ; cbp = 0 |
|
|
mov edx, 6 |
|
79 |
.loop |
.loop |
80 |
movq mm0, [esi] |
movq mm0, [esi] |
|
pand mm0, mm7 |
|
81 |
movq mm1, [esi+8] |
movq mm1, [esi+8] |
82 |
|
pand mm0, mm7 |
83 |
|
|
84 |
por mm0, [esi+16] |
por mm0, [esi+16] |
85 |
por mm1, [esi+24] |
por mm1, [esi+24] |
105 |
por mm0, mm1 |
por mm0, mm1 |
106 |
movq mm1, mm0 |
movq mm1, mm0 |
107 |
psrlq mm1, 32 |
psrlq mm1, 32 |
108 |
|
lea esi, [esi + 128] |
109 |
|
|
110 |
por mm0, mm1 |
por mm0, mm1 |
111 |
movd ebx, mm0 |
movd ebx, mm0 |
112 |
|
|
113 |
add esi, 128 |
test ebx, ebx |
114 |
|
jz .next |
115 |
or ebx, ebx |
or eax, edx ; cbp |= 1 << (5-i) |
116 |
jz .iterate |
|
117 |
|
.next |
118 |
; cbp |= 1 << (edx-1) |
shr edx,1 |
119 |
|
jnc .loop |
|
mov ecx, edx |
|
|
dec ecx |
|
|
mov ebx, 1 |
|
|
shl ebx, cl |
|
|
or eax, ebx |
|
|
|
|
|
.iterate dec edx |
|
|
jnz .loop |
|
120 |
|
|
121 |
pop esi |
pop esi |
|
pop edx |
|
|
pop ecx |
|
122 |
pop ebx |
pop ebx |
123 |
|
|
124 |
ret |
ret |