5c6423ae |
1 | /* |
2 | * (C) GraÅžvydas "notaz" Ignotas, 2014 |
3 | * |
4 | * This work is licensed under the terms of GNU GPL version 2 or later. |
5 | * See the COPYING file in the top-level directory. |
6 | */ |
7 | |
8 | #include "arm_features.h" |
9 | |
10 | .syntax unified |
11 | .text |
12 | .align 3 |
13 | |
14 | .macro do_mac_flags rr1 rr2 rr3 |
15 | cmp \rr1, #1 |
16 | .endm |
17 | |
18 | |
19 | /* |
20 | * ProcessVertexData register map: |
21 | * |
22 | * q | d | c code |
23 | * 0 0 |
24 | * 1 |
25 | * 1 2 |
26 | * 3 |
27 | * 2 4 |
28 | * 5 |
29 | * 3 6 |
30 | * 7 |
31 | * 4 8 |
32 | * 9 |
33 | * 5 10 |
34 | * 11 |
35 | * 6 12 |
36 | * 13 |
37 | * 7 14 g_vecProjected |
38 | * 15 |
39 | * 8 16 |
40 | * 17 |
41 | * ... |
42 | * 12 24 gRSPworldProject _11,_21,_31,_41 |
43 | * 25 |
44 | * 13 26 gRSPworldProject _12,_22,_32,_42 |
45 | * 27 |
46 | * 14 28 gRSPworldProject _13,_23,_33,_43 |
47 | * 29 |
48 | * 15 30 gRSPworldProject _14,_24,_34,_44 |
49 | * 31 |
50 | * |
51 | * r4 vtx[], 16 bytes: |
52 | * short y, x, flag, z, tv, tu; |
53 | * / uint8 a, b, g, r; |
54 | * \ char a, z, y, x; |
55 | * |
56 | * outputs: |
57 | * r0 - XVECTOR4 *g_vtxTransformed |
58 | * r1 - XVECTOR4 *g_vecProjected |
59 | * r2 - uint32 *g_dwVtxDifColor |
60 | * r3 - VECTOR2 *g_fVtxTxtCoords |
61 | * sp+00 - float *g_fFogCoord |
62 | * sp+04 - uint32 *g_clipFlag2 |
63 | * inputs: |
64 | * r11 sp+08 - uint32 dwNum |
65 | * sp+0c - int neon_flags |
66 | * r4 sp+10 - FiddledVtx vtx[] |
67 | * sp+14 - Light *gRSPlights |
68 | * sp+18 - float *fRSPAmbientLightRGBA |
69 | * sp+1c - XMATRIX *gRSPworldProjectTransported |
70 | * sp+20 - XMATRIX *gRSPmodelViewTop |
71 | * sp+24 - uint32 gRSPnumLights |
72 | * sp+28 - float gRSPfFogMin |
73 | */ |
74 | FUNCTION(pv_neon): @ |
75 | ldr r12, [sp, #0x10] |
76 | pld [r12] |
77 | |
78 | push {r4-r11,lr} |
79 | vpush {q4-q7} |
80 | |
81 | mov r4, r12 @ vtx |
82 | ldr r12, [sp, #0x64+0x1c] |
83 | ldr r11, [sp, #0x64+0x08] |
84 | vld1.32 {q12,q13}, [r12, :128]! @ load gRSPworldProject |
85 | vld1.32 {q14,q15}, [r12, :128] |
86 | |
87 | 0: |
88 | vld1.16 d4[1], [r4]! @ y |
89 | vld1.16 d4[0], [r4]! @ x |
90 | vld1.16 d4[3], [r4]! @ flag |
91 | vld1.16 d4[2], [r4]! @ z |
92 | vld1.16 d5[1], [r4]! @ v |
93 | vld1.16 d5[0], [r4]! @ u |
94 | vmovl.s16 q0, d4 |
95 | vmovl.s16 q1, d5 |
96 | mov r12, #0x3f800000 @ 1.0f |
97 | vcvt.f32.s32 q2, q0 @ q2 = vtx_raw |
98 | vcvt.f32.s32 q3, q1 @ d6 = float u, v |
99 | vmov.32 d5[1], r12 @ q2 = { x, y, x, 1.0f } |
100 | vmul.f32 q4, q2, q12 |
101 | vmul.f32 q5, q2, q13 |
102 | vmul.f32 q6, q2, q14 |
103 | vmul.f32 q7, q2, q15 |
104 | /* wrt u,v to g_fVtxTxtCoords */ vst1.32 {d6}, [r3]! |
105 | vpadd.f32 d7, d14, d15 |
106 | vpadd.f32 d6, d12, d13 |
107 | vpadd.f32 d5, d10, d11 |
108 | vpadd.f32 d4, d8, d9 |
109 | vpadd.f32 d1, d6, d7 @ g_vtxTransformed .z .w |
110 | vpadd.f32 d0, d4, d5 @ g_vtxTransformed .x .y |
111 | |
112 | #if 1 |
113 | vrecpe.f32 d2, d1 @ inv .z(unused) .w |
114 | vrecps.f32 d3, d1, d2 @ step |
115 | /* wrt g_vtxTransformed */ vst1.32 {q0}, [r0]! |
116 | vmul.f32 d2, d3, d2 @ better inv |
117 | vrecps.f32 d3, d1, d2 @ step |
118 | vmul.f32 d2, d3, d2 @ better inv |
119 | #if 0 |
120 | vrecps.f32 d3, d1, d2 @ step |
121 | vmul.f32 d2, d3, d2 @ better inv |
122 | #endif |
123 | #else |
124 | vmov.f32 s5, r12 |
125 | /* wrt g_vtxTransformed */ vst1.32 {q0}, [r0]! |
126 | vdiv.f32 s5, s5, s3 |
127 | #endif |
128 | |
129 | vmul.f32 q7, q0, d2[1] |
130 | vshr.u64 d2, #32 |
131 | vsli.64 d15, d2, #32 |
132 | /* wrt g_vecProjected */ vst1.32 {q7}, [r1]! |
133 | |
134 | vpop {q4-q7} |
135 | pop {r4-r11,pc} |
136 | .size pv_neon, .-pv_neon |
137 | |
138 | |
139 | @ vim:filetype=armasm |