1 #ifndef _OP_LIGHT_ARM_H_
2 #define _OP_LIGHT_ARM_H_
4 ////////////////////////////////////////////////////////////////////////////////
5 // Extract bgr555 color from Gouraud u32 fixed-pt 8.3:8.3:8.2 rgb triplet
8 // 'gCol' input: rrrrrrrrXXXggggggggXXXbbbbbbbbXX
11 // u16 output: 0bbbbbgggggrrrrr
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)
17 uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output
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)
31 ////////////////////////////////////////////////////////////////////////////////
32 // Apply fast (low-precision) 5-bit lighting to bgr555 texture color:
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
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)
45 uint_fast16_t out = 0x03E0;
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)
69 ////////////////////////////////////////////////////////////////////////////////
70 // Apply fast (low-precision) 5-bit Gouraud lighting to bgr555 texture color:
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
77 // 'uSrc' input: mbbbbbgggggrrrrr
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)
85 uint_fast16_t out = 0x03E0; // don't need the mask after starting to write output
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)
112 #endif //_OP_LIGHT_ARM_H_