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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 | //////////////////////////////////////////////////////////////////////////////// |
15 | GPU_INLINE uint_fast16_t gpuLightingRGBARM(u32 gCol) |
16 | { |
17 | uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output |
18 | u32 tmp; |
19 | |
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 | ); |
27 | |
28 | return out; |
29 | } |
30 | |
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 | //////////////////////////////////////////////////////////////////////////////// |
43 | GPU_INLINE uint_fast16_t gpuLightingTXTARM(uint_fast16_t uSrc, u8 r5, u8 g5, u8 b5) |
44 | { |
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_senquack.LightLUT), [src] "r" (uSrc), "0" (out) |
65 | : "cc"); |
66 | return out; |
67 | } |
68 | |
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 | //////////////////////////////////////////////////////////////////////////////// |
83 | GPU_INLINE uint_fast16_t gpuLightingTXTGouraudARM(uint_fast16_t uSrc, u32 gCol) |
84 | { |
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_senquack.LightLUT), "0" (out), [src] "r" (uSrc) |
107 | : "cc"); |
108 | |
109 | return out; |
110 | } |
111 | |
112 | #endif //_OP_LIGHT_ARM_H_ |