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1/*
2** Copyright 2015, The Android Open Source Project
3**
4** Licensed under the Apache License, Version 2.0 (the "License");
5** you may not use this file except in compliance with the License.
6** You may obtain a copy of the License at
7**
8**     http://www.apache.org/licenses/LICENSE-2.0
9**
10** Unless required by applicable law or agreed to in writing, software
11** distributed under the License is distributed on an "AS IS" BASIS,
12** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13** See the License for the specific language governing permissions and
14** limitations under the License.
15*/
16
17       .macro pixel dreg src f sR sG sB shift
18
19#if __mips==32 && __mips_isa_rev>=2
20       /* extract red */
21       ext $t4,\src,\shift+11,5
22       mul $t4,$t4,\f
23
24       /* extract green */
25       ext $t5,\src,\shift+5,6
26       mul $t5,$t5,\f
27
28       /* extract blue */
29       ext $t6,\src,\shift,5
30       mul $t6,$t6,\f
31#else
32       /* extract red */
33       srl $t4,\src,\shift+11
34       andi $t4, 0x1f
35       mul $t4,$t4,\f
36
37       /* extract green */
38       srl $t5,\src,\shift+5
39       andi $t5, 0x3f
40       mul $t5,$t5,\f
41
42       /* extract blue */
43       srl $t6,\src,\shift
44       andi $t6, 0x1f
45       mul $t6,$t6,\f
46#endif
47
48       srl $t4,$t4,8
49       srl $t5,$t5,8
50       srl $t6,$t6,8
51       addu $t4,$t4,\sR
52       addu $t5,$t5,\sG
53       addu \dreg,$t6,\sB
54       sll $t4,$t4,11
55       sll $t5,$t5,5
56       or \dreg,\dreg,$t4
57       or \dreg,\dreg,$t5
58       andi \dreg, 0xffff
59       .endm
60
61       .text
62       .balign 4
63
64       .global scanline_col32cb16blend_mips
65       .ent    scanline_col32cb16blend_mips
66scanline_col32cb16blend_mips:
67
68       /* check if count is zero */
69       srl     $v0,$a1,24 /* sA */
70       beqz    $a2,done
71       li      $t4, 0x100
72       srl     $v1,$v0,7
73       addu    $v0,$v1,$v0
74       subu    $v0,$t4,$v0 /* f */
75#if __mips==32 && __mips_isa_rev>=2
76       ext     $a3,$a1,3,5 /* sR */
77       ext     $t0,$a1,10,6 /* sG */
78       ext     $t1,$a1,19,5 /* sB */
79#else
80       srl     $a3, $a1, 3
81       andi    $a3, 0x1f    /* sR */
82       srl     $t0, $a1, 10
83       andi    $t0, 0x3f    /* sG */
84       srl     $t1, $a1, 19
85       andi    $t1, 0x1f    /* sB */
86#endif
87
88       /* check if cnt is at least 4 */
89       addiu   $a2,$a2,-4
90       bltz    $a2,tail
91
92loop_4pixels:
93       lw      $t7,0($a0)
94       lw      $t8,4($a0)
95       addiu   $a0,$a0,8
96       addiu   $a2,$a2,-4
97       pixel   $t2 $t7 $v0 $a3 $t0 $t1 0
98       pixel   $t3 $t7 $v0 $a3 $t0 $t1 16
99#if __mips==32 && __mips_isa_rev>=2
100       ins     $t2,$t3,16,16
101#else
102       sll $t3, 16
103       or  $t2, $t2, $t3
104#endif
105       pixel   $t7 $t8 $v0 $a3 $t0 $t1 0
106       pixel   $t3 $t8 $v0 $a3 $t0 $t1 16
107#if __mips==32 && __mips_isa_rev>=2
108       ins     $t7,$t3,16,16
109#else
110       sll $t3, 16
111       or  $t7, $t7, $t3
112#endif
113       sw      $t2,-8($a0)
114       sw      $t7,-4($a0)
115       bgez    $a2, loop_4pixels
116
117tail:
118       /* the pixel count underran, restore it now */
119       addiu   $a2,$a2,4
120
121       /* handle the last 0..3 pixels */
122       beqz    $a2,done
123
124loop_1pixel:
125       lhu     $t7,0($a0)
126       addiu   $a0,$a0,2
127       addiu   $a2,$a2,-1
128       pixel   $t2 $t7 $v0 $a3 $t0 $t1 0
129       sh      $t2, -2($a0)
130       bnez    $a2,loop_1pixel
131
132done:
133       j       $ra
134       .end    scanline_col32cb16blend_mips
135