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1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2011 |
3 | * |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
11 | |
12 | .text |
13 | .align 2 |
14 | |
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15 | .macro load_varadr reg var |
16 | #if defined(__ARM_ARCH_7A__) && !defined(__PIC__) |
17 | movw \reg, #:lower16:\var |
18 | movt \reg, #:upper16:\var |
19 | #else |
20 | ldr \reg, =\var |
21 | #endif |
22 | .endm |
23 | |
24 | #ifdef __ARM_NEON__ |
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25 | |
26 | .global mix_chan @ (int start, int count, int lv, int rv) |
27 | mix_chan: |
28 | vmov.32 d14[0], r2 |
29 | vmov.32 d14[1], r3 @ multipliers |
30 | mov r12, r0 |
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31 | load_varadr r0, ChanBuf |
32 | load_varadr r2, SSumLR |
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33 | add r0, r12, lsl #2 |
34 | add r2, r12, lsl #3 |
35 | 0: |
36 | vldmia r0!, {d0-d1} |
37 | vldmia r2, {d2-d5} |
38 | vmul.s32 d10, d14, d0[0] |
39 | vmul.s32 d11, d14, d0[1] |
40 | vmul.s32 d12, d14, d1[0] |
41 | vmul.s32 d13, d14, d1[1] |
42 | vsra.s32 q1, q5, #14 |
43 | vsra.s32 q2, q6, #14 |
44 | subs r1, #4 |
45 | blt mc_finish |
46 | vstmia r2!, {d2-d5} |
47 | bgt 0b |
48 | nop |
49 | bxeq lr |
50 | |
51 | mc_finish: |
52 | vstmia r2!, {d2} |
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53 | cmp r1, #-2 |
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54 | vstmiage r2!, {d3} |
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55 | cmp r1, #-1 |
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56 | vstmiage r2!, {d4} |
57 | bx lr |
58 | |
59 | |
60 | .global mix_chan_rvb @ (int start, int count, int lv, int rv) |
61 | mix_chan_rvb: |
62 | vmov.32 d14[0], r2 |
63 | vmov.32 d14[1], r3 @ multipliers |
64 | mov r12, r0 |
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65 | load_varadr r0, ChanBuf |
66 | load_varadr r3, sRVBStart |
67 | load_varadr r2, SSumLR |
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68 | ldr r3, [r3] |
69 | add r0, r12, lsl #2 |
70 | add r2, r12, lsl #3 |
71 | add r3, r12, lsl #3 |
72 | 0: |
73 | vldmia r0!, {d0-d1} |
74 | vldmia r2, {d2-d5} |
75 | vldmia r3, {d6-d9} |
76 | vmul.s32 d10, d14, d0[0] |
77 | vmul.s32 d11, d14, d0[1] |
78 | vmul.s32 d12, d14, d1[0] |
79 | vmul.s32 d13, d14, d1[1] |
80 | vsra.s32 q1, q5, #14 |
81 | vsra.s32 q2, q6, #14 |
82 | vsra.s32 q3, q5, #14 |
83 | vsra.s32 q4, q6, #14 |
84 | subs r1, #4 |
85 | blt mcr_finish |
86 | vstmia r2!, {d2-d5} |
87 | vstmia r3!, {d6-d9} |
88 | bgt 0b |
89 | nop |
90 | bxeq lr |
91 | |
92 | mcr_finish: |
93 | vstmia r2!, {d2} |
94 | vstmia r3!, {d6} |
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95 | cmp r1, #-2 |
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96 | vstmiage r2!, {d3} |
97 | vstmiage r3!, {d7} |
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98 | cmp r1, #-1 |
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99 | vstmiage r2!, {d4} |
100 | vstmiage r3!, {d8} |
101 | bx lr |
102 | |
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103 | #else |
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104 | |
105 | .global mix_chan @ (int start, int count, int lv, int rv) |
106 | mix_chan: |
107 | stmfd sp!, {r4-r8,lr} |
108 | orr r3, r2, r3, lsl #16 |
109 | lsl r3, #1 @ packed multipliers << 1 |
110 | mov r12, r0 |
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111 | load_varadr r0, ChanBuf |
112 | load_varadr r2, SSumLR |
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113 | add r0, r12, lsl #2 |
114 | add r2, r12, lsl #3 |
115 | 0: |
116 | ldmia r0!, {r4,r5} |
117 | ldmia r2, {r6-r8,lr} |
118 | lsl r4, #1 @ adjust for mul |
119 | lsl r5, #1 |
120 | smlawb r6, r4, r3, r6 |
121 | smlawt r7, r4, r3, r7 |
122 | smlawb r8, r5, r3, r8 |
123 | smlawt lr, r5, r3, lr |
124 | subs r1, #2 |
125 | blt mc_finish |
126 | stmia r2!, {r6-r8,lr} |
127 | bgt 0b |
128 | ldmeqfd sp!, {r4-r8,pc} |
129 | |
130 | mc_finish: |
131 | stmia r2!, {r6,r7} |
132 | ldmfd sp!, {r4-r8,pc} |
133 | |
134 | |
135 | .global mix_chan_rvb @ (int start, int count, int lv, int rv) |
136 | mix_chan_rvb: |
137 | stmfd sp!, {r4-r8,lr} |
138 | orr lr, r2, r3, lsl #16 |
139 | lsl lr, #1 |
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140 | load_varadr r3, sRVBStart |
141 | load_varadr r2, SSumLR |
142 | load_varadr r4, ChanBuf |
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143 | ldr r3, [r3] |
144 | add r2, r2, r0, lsl #3 |
145 | add r3, r3, r0, lsl #3 |
146 | add r0, r4, r0, lsl #2 |
147 | 0: |
148 | ldr r4, [r0], #4 |
149 | ldmia r2, {r6,r7} |
150 | ldmia r3, {r8,r12} |
151 | lsl r4, #1 |
152 | smlawb r6, r4, lr, r6 @ supposedly takes single cycle? |
153 | smlawt r7, r4, lr, r7 |
154 | smlawb r8, r4, lr, r8 |
155 | smlawt r12,r4, lr, r12 |
156 | subs r1, #1 |
157 | stmia r2!, {r6,r7} |
158 | stmia r3!, {r8,r12} |
159 | bgt 0b |
160 | ldmfd sp!, {r4-r8,pc} |
161 | |
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162 | #endif |
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163 | |
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164 | @ vim:filetype=armasm |