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788f5e89 JW |
1 | #ifndef _OP_LIGHT_ARM_H_ |
2 | #define _OP_LIGHT_ARM_H_ | |
3 | ||
4 | //////////////////////////////////////////////////////////////////////////////// | |
5 | // Extract bgr555 color from Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet | |
6 | // | |
7 | // INPUT: | |
8 | // 'gCol' input: rrrrrrrrXXXggggggggXXXbbbbbbbbXX | |
9 | // ^ bit 31 | |
10 | // RETURNS: | |
11 | // u16 output: 0bbbbbgggggrrrrr | |
12 | // ^ bit 16 | |
13 | // Where 'r,g,b' are integer bits of colors, 'X' fixed-pt, and '0' zero | |
14 | //////////////////////////////////////////////////////////////////////////////// | |
92eab56a | 15 | GPU_INLINE uint_fast16_t gpuLightingRGBARM(u32 gCol) |
788f5e89 | 16 | { |
335c3831 JW |
17 | uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output |
18 | u32 tmp; | |
788f5e89 | 19 | |
335c3831 JW |
20 | asm ("and %[tmp], %[gCol], %[out]\n\t" // tmp holds 0x000000bbbbb00000 |
21 | "and %[out], %[out], %[gCol], lsr #0x0B\n\t" // out holds 0x000000ggggg00000 | |
22 | "orr %[tmp], %[out], %[tmp], lsl #0x05\n\t" // tmp holds 0x0bbbbbggggg00000 | |
23 | "orr %[out], %[tmp], %[gCol], lsr #0x1B\n\t" // out holds 0x0bbbbbgggggrrrrr | |
24 | : [out] "+&r" (out), [tmp] "=&r" (tmp) | |
25 | : [gCol] "r" (gCol) | |
26 | ); | |
788f5e89 | 27 | |
335c3831 | 28 | return out; |
788f5e89 JW |
29 | } |
30 | ||
335c3831 JW |
31 | //////////////////////////////////////////////////////////////////////////////// |
32 | // Apply fast (low-precision) 5-bit lighting to bgr555 texture color: | |
33 | // | |
34 | // INPUT: | |
35 | // 'r5','g5','b5' are unsigned 5-bit color values, value of 15 | |
36 | // is midpoint that doesn't modify that component of texture | |
37 | // 'uSrc' input: mbbbbbgggggrrrrr | |
38 | // ^ bit 16 | |
39 | // RETURNS: | |
40 | // u16 output: mbbbbbgggggrrrrr | |
41 | // Where 'X' are fixed-pt bits. | |
42 | //////////////////////////////////////////////////////////////////////////////// | |
92eab56a | 43 | GPU_INLINE uint_fast16_t gpuLightingTXTARM(uint_fast16_t uSrc, u8 r5, u8 g5, u8 b5) |
788f5e89 | 44 | { |
335c3831 JW |
45 | uint_fast16_t out = 0x03E0; |
46 | u32 db, dg; | |
47 | ||
48 | // Using `g` for src, `G` for dest | |
49 | asm ("and %[dg], %[out], %[src] \n\t" // dg holds 0x000000ggggg00000 | |
50 | "orr %[dg], %[dg], %[g5] \n\t" // dg holds 0x000000gggggGGGGG | |
51 | "and %[db], %[out], %[src], lsr #0x05 \n\t" // db holds 0x000000bbbbb00000 | |
52 | "ldrb %[dg], [%[lut], %[dg]] \n\t" // dg holds result 0x00000000000ggggg | |
53 | "and %[out], %[out], %[src], lsl #0x05 \n\t" // out holds 0x000000rrrrr00000 | |
54 | "orr %[out], %[out], %[r5] \n\t" // out holds 0x000000rrrrrRRRRR | |
55 | "orr %[db], %[db], %[b5] \n\t" // db holds 0x000000bbbbbBBBBB | |
56 | "ldrb %[out], [%[lut], %[out]] \n\t" // out holds result 0x00000000000rrrrr | |
57 | "ldrb %[db], [%[lut], %[db]] \n\t" // db holds result 0x00000000000bbbbb | |
58 | "tst %[src], #0x8000\n\t" // check whether msb was set on uSrc | |
59 | "orr %[out], %[out], %[dg], lsl #0x05 \n\t" // out holds 0x000000gggggrrrrr | |
60 | "orrne %[out], %[out], #0x8000\n\t" // add msb to out if set on uSrc | |
61 | "orr %[out], %[out], %[db], lsl #0x0A \n\t" // out holds 0xmbbbbbgggggrrrrr | |
62 | : [out] "=&r" (out), [db] "=&r" (db), [dg] "=&r" (dg) | |
63 | : [r5] "r" (r5), [g5] "r" (g5), [b5] "r" (b5), | |
64 | [lut] "r" (gpu_unai.LightLUT), [src] "r" (uSrc), "0" (out) | |
65 | : "cc"); | |
66 | return out; | |
788f5e89 JW |
67 | } |
68 | ||
335c3831 JW |
69 | //////////////////////////////////////////////////////////////////////////////// |
70 | // Apply fast (low-precision) 5-bit Gouraud lighting to bgr555 texture color: | |
71 | // | |
72 | // INPUT: | |
73 | // 'gCol' is a packed Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet, value of | |
74 | // 15.0 is midpoint that does not modify color of texture | |
75 | // gCol input : rrrrrXXXXXXgggggXXXXXXbbbbbXXXXX | |
76 | // ^ bit 31 | |
77 | // 'uSrc' input: mbbbbbgggggrrrrr | |
78 | // ^ bit 16 | |
79 | // RETURNS: | |
80 | // u16 output: mbbbbbgggggrrrrr | |
81 | // Where 'X' are fixed-pt bits, '0' is zero-padding, and '-' is don't care | |
82 | //////////////////////////////////////////////////////////////////////////////// | |
92eab56a | 83 | GPU_INLINE uint_fast16_t gpuLightingTXTGouraudARM(uint_fast16_t uSrc, u32 gCol) |
788f5e89 | 84 | { |
335c3831 JW |
85 | uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output |
86 | u32 db,dg,gtmp; | |
87 | ||
88 | // Using `g` for src, `G` for dest | |
89 | asm ("and %[dg], %[out], %[src] \n\t" // dg holds 0x000000ggggg00000 | |
90 | "and %[gtmp],%[out], %[gCol], lsr #0x0B \n\t" // gtmp holds 0x000000GGGGG00000 | |
91 | "and %[db], %[out], %[src], lsr #0x05 \n\t" // db holds 0x000000bbbbb00000 | |
92 | "orr %[dg], %[dg], %[gtmp], lsr #0x05 \n\t" // dg holds 0x000000gggggGGGGG | |
93 | "and %[gtmp],%[out], %[gCol] \n\t" // gtmp holds 0x000000BBBBB00000 | |
94 | "ldrb %[dg], [%[lut], %[dg]] \n\t" // dg holds result 0x00000000000ggggg | |
95 | "and %[out], %[out], %[src], lsl #0x05 \n\t" // out holds 0x000000rrrrr00000 | |
96 | "orr %[out], %[out], %[gCol], lsr #0x1B \n\t" // out holds 0x000000rrrrrRRRRR | |
97 | "orr %[db], %[db], %[gtmp], lsr #0x05 \n\t" // db holds 0x000000bbbbbBBBBB | |
98 | "ldrb %[out], [%[lut], %[out]] \n\t" // out holds result 0x00000000000rrrrr | |
99 | "ldrb %[db], [%[lut], %[db]] \n\t" // db holds result 0x00000000000bbbbb | |
100 | "tst %[src], #0x8000\n\t" // check whether msb was set on uSrc | |
101 | "orr %[out], %[out], %[dg], lsl #0x05 \n\t" // out holds 0x000000gggggrrrrr | |
102 | "orrne %[out], %[out], #0x8000\n\t" // add msb to out if set on uSrc | |
103 | "orr %[out], %[out], %[db], lsl #0x0A \n\t" // out holds 0xmbbbbbgggggrrrrr | |
104 | : [out] "=&r" (out), [db] "=&r" (db), [dg] "=&r" (dg), | |
105 | [gtmp] "=&r" (gtmp) \ | |
106 | : [gCol] "r" (gCol), [lut] "r" (gpu_unai.LightLUT), "0" (out), [src] "r" (uSrc) | |
107 | : "cc"); | |
788f5e89 | 108 | |
335c3831 | 109 | return out; |
788f5e89 JW |
110 | } |
111 | ||
112 | #endif //_OP_LIGHT_ARM_H_ |