2445b7cb |
1 | # vim:filetype=mips |
2 | |
3 | # some asm utils |
4 | # (c) Copyright 2007, Grazvydas "notaz" Ignotas |
5 | # All Rights Reserved |
6 | |
7 | .set noreorder |
8 | .set noat |
9 | |
10 | .data |
11 | .align 4 |
12 | |
13 | .byte 0, 1, 6, 11, 16, 21, 26, 31 # -4 |
14 | .byte 0, 2, 7, 12, 16, 21, 26, 31 # -3 |
15 | .byte 0, 3, 7, 12, 17, 22, 26, 31 # -2 |
16 | .byte 0, 4, 8, 13, 17, 22, 26, 31 # -1 |
17 | gmtab: |
18 | .byte 0, 5, 10, 15, 16, 21, 26, 31 # 0 |
19 | .byte 0, 6, 10, 15, 19, 23, 27, 31 |
20 | .byte 0, 7, 11, 15, 19, 23, 27, 31 |
21 | .byte 0, 8, 12, 16, 19, 23, 27, 31 |
22 | .byte 0, 9, 12, 16, 20, 24, 27, 31 |
23 | .byte 0, 10, 13, 17, 20, 24, 27, 31 |
24 | .byte 0, 10, 14, 17, 21, 24, 28, 31 |
25 | .byte 0, 11, 15, 18, 21, 24, 28, 31 |
26 | .byte 0, 12, 15, 18, 22, 25, 28, 31 |
27 | .byte 0, 13, 16, 19, 22, 25, 28, 31 |
28 | .byte 0, 14, 17, 20, 22, 25, 28, 31 # 10 |
29 | .byte 0, 15, 17, 20, 23, 26, 28, 31 |
30 | .byte 0, 16, 18, 21, 23, 26, 28, 31 |
31 | .byte 0, 16, 19, 21, 24, 26, 29, 31 |
32 | .byte 0, 17, 20, 22, 24, 26, 29, 31 |
33 | .byte 0, 18, 20, 22, 25, 27, 29, 31 |
34 | .byte 0, 19, 21, 23, 25, 27, 29, 31 # 16 |
35 | |
36 | .text |
37 | .align 4 |
38 | |
39 | # bbbb bggg gggr rrrr |
40 | |
41 | .global do_pal_convert # dest, src, gammaa_val |
42 | |
43 | do_pal_convert: |
44 | bnez $a2, dpc_gma |
45 | li $t0, 64/2 |
46 | lui $t2, 0x00e |
47 | ori $t2, 0x00e |
48 | lui $t3, 0x006 |
49 | ori $t3, 0x006 |
50 | lui $t4, 0x0e0 |
51 | ori $t4, 0x0e0 |
52 | lui $t6, 0xe00 |
53 | ori $t6, 0xe00 |
54 | lui $t7, 0x600 |
55 | ori $t7, 0x600 |
56 | |
57 | dpc_loop: |
58 | lw $v0, 0($a1) |
59 | addiu $a1, 4 |
60 | and $v1, $v0, $t2 # r |
61 | sll $v1, 1 |
62 | and $t9, $v0, $t3 |
63 | srl $t9, 1 |
64 | or $v1, $t9 # r |
65 | and $t9, $v0, $t4 # g |
66 | sll $t8, $t9, 3 |
67 | or $v1, $t8 |
68 | or $v1, $t9 # g |
69 | and $t9, $v0, $t6 # b |
70 | sll $t9, 4 |
71 | or $v1, $t9 |
72 | and $t9, $v0, $t7 |
73 | sll $t9, 2 |
74 | or $v1, $t9 # b |
75 | sw $v1, 0($a0) |
76 | addiu $t0, -1 |
77 | bnez $t0, dpc_loop |
78 | addiu $a0, 4 |
79 | |
80 | jr $ra |
81 | nop |
82 | |
83 | dpc_gma: |
84 | sll $a2, 3 |
85 | lui $t1, %hi(gmtab) |
86 | addiu $t1, %lo(gmtab) |
87 | addu $a2, $t1 |
88 | |
89 | dpc_gma_loop: |
90 | lw $v0, 0($a1) |
91 | addiu $a1, 4 |
92 | ext $v1, $v0, 1, 3 |
93 | addu $v1, $a2 |
94 | lb $v1, 0($v1) |
95 | ext $t1, $v0, 5, 3 |
96 | addu $t1, $a2 |
97 | lb $t1, 0($t1) |
98 | ext $t2, $v0, 9, 3 |
99 | addu $t2, $a2 |
100 | lb $t2, 0($t2) |
101 | ext $t3, $v0, 17, 3 |
102 | addu $t3, $a2 |
103 | lb $t3, 0($t3) |
104 | ext $t4, $v0, 21, 3 |
105 | addu $t4, $a2 |
106 | lb $t4, 0($t4) |
107 | ext $t5, $v0, 25, 3 |
108 | addu $t5, $a2 |
109 | lb $t5, 0($t5) |
110 | ins $v1, $t1, 6, 5 |
111 | ins $v1, $t2, 11, 5 |
112 | ins $v1, $t3, 16, 5 |
113 | ins $v1, $t4, 22, 5 |
114 | ins $v1, $t5, 27, 5 |
115 | sw $v1, 0($a0) |
116 | addiu $t0, -1 |
117 | bnez $t0, dpc_gma_loop |
118 | addiu $a0, 4 |
119 | |
120 | jr $ra |
121 | nop |
122 | |