1 @ assembly "optimized" version of some funtions from draw.c
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2 @ this is highly specialized, be careful if changing related C code!
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4 @ (c) Copyright 2006, notaz
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5 @ All Rights Reserved
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14 .extern DrawLineDest
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15 .extern DrawStripVSRam
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16 .extern DrawStripInterlace
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20 .macro TilePixel pat lsrr offs
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24 ands r4, \pat, r2, lsr #\lsrr
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27 strneb r4, [r1,#\offs]
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30 @ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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32 TilePixel \pat, 12, 0 @ #0x0000f000
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33 TilePixel \pat, 8, 1 @ #0x00000f00
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34 TilePixel \pat, 4, 2 @ #0x000000f0
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35 TilePixel \pat, 0, 3 @ #0x0000000f
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36 TilePixel \pat, 28, 4 @ #0xf0000000
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37 TilePixel \pat, 24, 5 @ #0x0f000000
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38 TilePixel \pat, 20, 6 @ #0x00f00000
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39 TilePixel \pat, 16, 7 @ #0x000f0000
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42 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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44 TilePixel \pat, 16, 0 @ #0x000f0000
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45 TilePixel \pat, 20, 1 @ #0x00f00000
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46 TilePixel \pat, 24, 2 @ #0x0f000000
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47 TilePixel \pat, 28, 3 @ #0xf0000000
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48 TilePixel \pat, 0, 4 @ #0x0000000f
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49 TilePixel \pat, 4, 5 @ #0x000000f0
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50 TilePixel \pat, 8, 6 @ #0x00000f00
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51 TilePixel \pat, 12, 7 @ #0x0000f000
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54 @ shadow/hilight mode
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56 @ this one is for hi priority layer
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57 .macro TilePixelShHP lsrr offs
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61 ands r4, r12, r2, lsr #\lsrr
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63 ldreqb r4, [r1,#\offs]
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65 strneb r4, [r1,#\offs]
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68 streqb r4, [r1,#\offs]
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71 @ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: register with helper pattern 0xf, touches r3 high bits
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73 TilePixelShHP 12, 0 @ #0x0000f000
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74 TilePixelShHP 8, 1 @ #0x00000f00
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75 TilePixelShHP 4, 2 @ #0x000000f0
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76 TilePixelShHP 0, 3 @ #0x0000000f
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77 TilePixelShHP 28, 4 @ #0xf0000000
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78 TilePixelShHP 24, 5 @ #0x0f000000
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79 TilePixelShHP 20, 6 @ #0x00f00000
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80 TilePixelShHP 16, 7 @ #0x000f0000
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83 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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85 TilePixelShHP 16, 0 @ #0x000f0000
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86 TilePixelShHP 20, 1 @ #0x00f00000
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87 TilePixelShHP 24, 2 @ #0x0f000000
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88 TilePixelShHP 28, 3 @ #0xf0000000
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89 TilePixelShHP 0, 4 @ #0x0000000f
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90 TilePixelShHP 4, 5 @ #0x000000f0
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91 TilePixelShHP 8, 6 @ #0x00000f00
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92 TilePixelShHP 12, 7 @ #0x0000f000
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96 @ TileSingleSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx; r12: helper pattern 0xf
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98 tst r0, #1 @ not aligned?
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104 strneb r4, [r1], #1
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105 streqh r4, [r1], #2
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117 strneb r4, [r1], #1
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120 @ TileSingleHi (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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121 .macro TileSingleHi
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122 tst r1, #1 @ not aligned?
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125 ldrneb r4, [r1], #1
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126 ldreqh r4, [r1], #2 @ 1ci
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128 bic r4, r4, r7, lsr #1
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130 strneb r4, [r1, #-3]
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131 streqh r4, [r1, #-4]
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133 bic r12, r12, r7, lsr #1
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135 strh r12, [r1, #-4]
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137 bic r4, r4, r7, lsr #1
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141 bic r12, r12, r7, lsr #1
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143 strh r12, [r1, #-2]
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144 bicne r4, r4, r7, lsr #1
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146 strneb r4, [r1], #1
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150 .macro TileDoShGenPixel shift ofs
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152 ands r4, r12, r2, lsr #\shift
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161 strb r4, [r1,#\ofs]
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164 ldrb r4, [r1,#\ofs] @ 2ci
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166 strb r4, [r1,#\ofs]
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169 ldrb r4, [r1,#\ofs] @ 2ci
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172 strb r4, [r1,#\ofs]
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176 @ TileFlipSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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178 TileDoShGenPixel 16, 0 @ #0x000f0000
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179 TileDoShGenPixel 20, 1 @ #0x00f00000
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180 TileDoShGenPixel 24, 2 @ #0x0f000000
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181 TileDoShGenPixel 28, 3 @ #0xf0000000
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182 TileDoShGenPixel 0, 4 @ #0x0000000f
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183 TileDoShGenPixel 4, 5 @ #0x000000f0
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184 TileDoShGenPixel 8, 6 @ #0x00000f00
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185 TileDoShGenPixel 12, 7 @ #0x0000f000
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188 @ TileNormSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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190 TileDoShGenPixel 12, 0 @ #0x0000f000
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191 TileDoShGenPixel 8, 1 @ #0x00000f00
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192 TileDoShGenPixel 4, 2 @ #0x000000f0
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193 TileDoShGenPixel 0, 3 @ #0x0000000f
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194 TileDoShGenPixel 28, 4 @ #0xf0000000
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195 TileDoShGenPixel 24, 5 @ #0x0f000000
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196 TileDoShGenPixel 20, 6 @ #0x00f00000
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197 TileDoShGenPixel 16, 7 @ #0x000f0000
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201 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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205 @ int nametab; // 0x00
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206 @ int line; // 0x04
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207 @ int hscroll; // 0x08
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208 @ int xmask; // 0x0C
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209 @ int *hc; // 0x10 (pointer to cache buffer)
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210 @ int cells; // 0x14
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213 @ int DrawLayer(int plane, int *hcache, int maxcells, int sh)
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215 .global DrawLayer @ int plane, int *hcache, int maxcells, int sh
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218 stmfd sp!, {r4-r11,lr}
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220 ldr r11, =(Pico+0x22228) @ Pico.video
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223 ldrb r7, [r11, #16] @ ??hh??ww
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225 mov r6, r1 @ hcache
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226 orr r9, r2, r3, lsl #31 @ r9=maxcells|(sh<<31)
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229 orr r1, r1, #0x00ff
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233 biclt r1, r1, #0xfc00
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234 biceq r1, r1, #0xfe00
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235 bicgt r1, r1, #0xff00 @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels
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239 subge r10, r10, #1 @ r10=shift[width] (5,6,6,7)
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242 mov r5, r8, lsl r10
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243 sub r5, r5, #1 @ r5=xmask
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247 ldreqb r12, [r11, #2]
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248 ldrneb r12, [r11, #4]
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250 ldr r2, =Scanline @ trying to make good use of pipeline here
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251 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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253 moveq r12, r12, lsl #10
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254 movne r12, r12, lsl #13
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255 and r12, r12, #(7<<13) @ r12=(ts->nametab<<1) (halfword compliant)
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257 ldrh r8, [r11, #12]
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258 ldrb r7, [r11, #11]
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261 mov r4, r8, lsr #8 @ pvid->reg[13]
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262 mov r4, r4, lsl #10 @ htab=pvid->reg[13]<<9; (halfwords)
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264 addne r4, r4, r2, lsl #2 @ htab+=Scanline<<1; // Offset by line
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266 biceq r4, r4, #0x1f @ htab&=~0xf; // Offset by tile
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267 add r4, r4, r0, lsl #1 @ htab+=plane
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268 bic r4, r4, #0x00ff0000 @ just in case
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269 ldrh r3, [lr, r4] @ r3=hscroll
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272 bne .DrawStrip_vsscroll
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274 @ Get vertical scroll value:
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275 add r7, lr, #0x012000
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276 add r7, r7, #0x000180 @ r7=Pico.vsram (Pico+0x22180)
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281 bne .DrawStrip_interlace
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284 movne r7, r7, lsr #16
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286 @ Find the line in the name table
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290 add r10, r10, #1 @ shift[width]++
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291 add r12, r12, r4, lsl r10 @ nametab+=(ts.line>>3)<<shift[width];
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293 @ ldmia r0, {r1,r2,r3,r5,r6,r9} @ r2=line, r3=ts->hscroll, r5=ts->xmask, r6=ts->hc, r9=ts->cells
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294 @ mov r12,r1, lsl #1 @ r12=(ts->nametab<<1) (halfword compliant)
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297 mov r10,r10, lsl #1 @ r10=ty=(ts->line&7)<<1;
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298 orr r10,r10, r9, lsl #24
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301 mov r8, r8, lsr #3 @ r8=tilex=(-ts->hscroll)>>3
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305 add r7, r1, #1 @ r7=dx=((ts->hscroll-1)&7)+1
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309 orrne r10,r10, #1<<23 @ r10=(cells<<24|sh<<23|hi_not_empty<<22|ty)
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310 movne r3, #0x40 @ default to shadowed pal on sh mode
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312 mvn r9, #0 @ r9=prevcode=-1
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315 addne r10,r10, #0x01000000 @ we will loop cells+1 times if there is scroll
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317 @ cache some stuff to avoid mem access
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320 add r1, r11, r7 @ r1=pdest
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323 @ r4 & r7 are scratch in this loop
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326 .dsloop: @ 40-41 times
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327 subs r10,r10, #0x01000000
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332 add r7, lr, r7, lsl #1 @ Pico.vram+((tilex&ts->xmask) as halfwords)
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333 ldrh r7, [r7, r12] @ r7=code (int, but from unsigned, no sign extend)
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339 bne .DrawStrip_hiprio
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342 beq .DrawStrip_samecode @ we know stuff about this tile already
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344 mov r9, r7 @ remember code
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346 movs r2, r9, lsl #20 @ if (code&0x1000)
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348 add r2, r2, r10, lsl #17
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349 mov r2, r2, lsr #17
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350 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
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352 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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355 and r3, r9, #0x6000
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356 add r3, r7, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
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358 .DrawStrip_samecode:
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360 beq .dsloop @ tileline blank
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363 beq .DrawStrip_SingleColor @ tileline singlecolor
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366 beq .DrawStrip_TileNorm
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368 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern
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372 .DrawStrip_TileNorm:
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376 .DrawStrip_SingleColor:
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379 orr r4, r4, r4, lsl #8
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380 tst r1, #1 @ not aligned?
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381 strneb r4, [r1], #1
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382 streqh r4, [r1], #2
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386 strneb r4, [r1], #1 @ have a remaining unaligned pixel?
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390 tst r10, #0x00c00000
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391 beq .DrawStrip_hiprio_maybempt
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393 orr r7, r7, r0, lsl #16
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394 orr r7, r7, r10, lsl #25 @ (ty<<25)
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396 eorne r7, r7, #7<<26 @ if(code&0x1000) cval^=7<<26;
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397 str r7, [r6], #4 @ cache hi priority tile
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401 .DrawStrip_hiprio_maybempt:
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403 beq .dsloop @ must've been empty, otherwise we wouldn't get here
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404 movs r2, r7, lsl #20 @ if (code&0x1000)
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406 add r2, r2, r10, lsl #17
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407 mov r2, r2, lsr #17
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408 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
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409 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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410 mov r9, r7 @ remember code
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412 orrne r10, r10, #1<<22
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413 bne .DrawStrip_hiprio
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418 str r0, [r6] @ terminate the cache list
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420 ldmfd sp!, {r4-r11,lr}
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424 .DrawStrip_vsscroll:
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425 @ shit, we have 2-cell column based vscroll
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426 @ let the c code handle this (for now)
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428 @ int nametab; // 0x00
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429 @ int line; // 0x04
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430 @ int hscroll; // 0x08
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431 @ int xmask; // 0x0C
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432 @ int *hc; // 0x10 (pointer to cache buffer)
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433 @ int cells; // 0x14
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436 orr r2, r1, r10, lsl #24 @ ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
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438 mov r0, r12, lsr #1 @ halfwords
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440 stmia sp, {r0,r2,r3,r5,r6,r9}
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443 bl DrawStripVSRam @ struct TileStrip *ts, int plane
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446 ldmfd sp!, {r4-r11,lr}
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449 @ interlace mode 2? Sonic 2?
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450 .DrawStrip_interlace:
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452 moveq r7, r7, lsl #21
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453 movne r7, r7, lsl #5
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455 @ Find the line in the name table
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456 add r2, r7, r2, lsl #22 @ r2=(vscroll+(Scanline<<1))<<21 (11 bits);
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457 orr r1, r1, #0x80000000
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458 and r2, r2, r1, ror #10 @ &((ymask<<1)|1)<<21;
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459 mov r2, r2, lsr #21
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461 mov r12, r12, lsr #1 @ halfwords
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462 add r0, r12, r4, lsl r10 @ nametab+=(ts.line>>4)<<shift[width];
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466 stmia sp, {r0,r2,r3,r5,r6,r9}
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469 bl DrawStripInterlace @ struct TileStrip *ts
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472 ldmfd sp!, {r4-r11,lr}
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477 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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480 .global BackFill @ int reg7, int sh
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483 stmfd sp!, {r4-r9,lr}
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485 ldr lr, =(HighCol+8)
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487 mov r0, r0, lsl #26
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488 mov r0, r0, lsr #26
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489 orr r0, r0, r1, lsl #6
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490 orr r0, r0, r0, lsl #8
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491 orr r0, r0, r0, lsl #16
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502 stmia lr!, {r0-r7} @ 10*8*4
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513 ldmfd sp!, {r4-r9,r12}
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517 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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520 .global DrawTilesFromCache @ int *hc, int sh
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522 DrawTilesFromCache:
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523 stmfd sp!, {r4-r8,r11,lr}
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525 mvn r5, #0 @ r5=prevcode=-1
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528 @ cache some stuff to avoid mem access
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530 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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535 ldr r6, [r0], #4 @ read code
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536 movs r1, r6, lsr #16 @ r1=dx;
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537 ldmeqfd sp!, {r4-r8,r11,pc} @ dx is never zero, this must be a terminator, return
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538 bic r1, r1, #0xfe00
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539 add r1, r11, r1 @ r1=pdest
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541 mov r7, r6, lsl #16
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542 cmp r5, r7, lsr #16
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543 beq .dtfc_samecode @ if (code==prevcode)
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545 mov r5, r7, lsr #16
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547 mov r2, r5, lsl #21
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548 mov r2, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4;
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549 add r2, r2, r6, lsr #25 @ addr+=ty
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551 and r3, r5, #0x6000
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552 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
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554 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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564 beq .dtfc_SingleColor @ tileline singlecolor
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569 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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580 orr r4, r4, r4, lsl #8
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581 tst r1, #1 @ not aligned?
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582 strneb r4, [r1], #1
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583 streqh r4, [r1], #2
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587 strneb r4, [r1], #1 @ have a remaining unaligned pixel?
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592 beq .dtfc_shadow_blank
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595 beq .dtfc_SingleColor @ tileline singlecolor
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598 beq .dtfc_TileNormShHP
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600 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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604 .dtfc_TileNormShHP:
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608 .dtfc_shadow_blank:
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609 ldrb r4, [r1] @ 1ci
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616 andeq r12,r12,#0x3f
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624 andeq r12,r12,#0x3f
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632 andeq r12,r12,#0x3f
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639 andeq r12,r12,#0x3f
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646 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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649 .global DrawSpritesFromCache @ int *hc, int sh
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651 DrawSpritesFromCache:
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652 stmfd sp!, {r4-r11,lr}
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654 @ cache some stuff to avoid mem access
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656 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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657 mov r6, r1, lsl #31
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664 ldr r9, [r10], #4 @ read code
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665 bic r6, r6, #7 @ using pipeline
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667 ldmeqfd sp!, {r4-r11,pc}
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669 mov r4, r9, lsl #28
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670 orr r6, r6, r4, lsr #30
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671 add r6, r6, #1 @ r6=s1cc???? ... ?????www (s=shadow/hilight, cc=pal, w=width)
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674 add r5, r5, #1 @ r5=delta
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676 rsbne r5, r5, #0 @ Flip X
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679 mov r2, r9, lsr #17
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680 mov r8, r2, lsl #1 @ tile=((unsigned int)code>>17)<<1;
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682 and r3, r9, #0x30 @ r3=pal=(code&0x30);
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685 orr r6, r6, r3, lsl #24
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687 mov r0, r9, lsl #16
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688 mov r0, r0, asr #22 @ sx=(code<<16)>>22
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689 adds r0, r0, #0 @ set ZV
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690 b .dsfc_inloop_enter
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700 .dsfc_inloop_enter:
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705 mov r8, r8, lsl #17
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706 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address
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708 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(Pico.vram+tile); // Get 8 pixels
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709 add r1, r11, r0 @ r1=pdest
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713 cmp r12, r6, lsr #28
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717 beq .dsfc_SingleColor @ tileline singlecolor
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722 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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731 tst r0, #1 @ not aligned?
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734 orr r4, r4, r4, lsl #8
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735 strneb r4, [r1], #1
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736 streqh r4, [r1], #2
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740 strneb r4, [r1], #1
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745 beq .dsfc_singlec_sh
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748 beq .dsfc_TileNorm_sh
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750 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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759 cmp r2, #0xe0000000
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760 bcc .dsfc_SingleColor @ normal singlecolor tileline (carry inverted in ARM)
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761 tst r2, #0x10000000
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772 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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774 @ + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
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775 @ + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
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777 .global DrawSprite @ unsigned int *sprite, int **hc, int sh
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780 stmfd sp!, {r4-r9,r11,lr}
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782 ldr r3, [r0] @ sprite[0]
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784 mov r6, r3, lsr #28
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785 sub r6, r6, #1 @ r6=width-1 (inc later)
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786 mov r5, r3, lsr #24
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787 and r5, r5, #7 @ r5=height
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789 mov r4, r3, lsl #16 @ r4=sy<<16 (tmp)
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793 sub r7, r7, r4, asr #16 @ r7=row=Scanline-sy
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796 mov r2, r9, asr #16 @ r2=sx
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797 bic r9, r9, #0xfe000000
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798 orrne r9, r9, #1<<31 @ r9=code|(sh<<31)
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801 movne r4, r5, lsl #3
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803 subne r7, r4, r7 @ if (code&0x1000) row=(height<<3)-1-row; // Flip Y
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805 mov r8, r9, lsl #21
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806 mov r8, r8, lsr #21
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807 add r8, r8, r7, lsr #3 @ tile+=row>>3; // Tile number increases going down
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810 mlane r8, r5, r6, r8 @ if (code&0x0800) { tile+=delta*(width-1);
\r
811 rsbne r5, r5, #0 @ delta=-delta; } // r5=delta now
\r
815 add r8, r8, r7, lsl #1 @ tile+=(row&7)<<1; // Tile address
\r
818 bne .dspr_cache @ if(code&0x8000) // high priority - cache it
\r
820 @ cache some stuff to avoid mem access
\r
822 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
825 mov r5, r5, lsl #4 @ delta<<=4; // Delta of address
\r
826 and r4, r9, #0x6000
\r
827 orr r9, r9, r4, lsl #16
\r
828 orr r9, r9, #0x10000000 @ r9=scc1 ???? ... <code> (s=shadow/hilight, cc=pal)
\r
831 mov r3, r4, lsr #9 @ r3=pal=((code>>9)&0x30);
\r
832 orrne r3, r3, #0x40 @ shadow by default
\r
834 add r6, r6, #1 @ inc now
\r
835 adds r0, r2, #0 @ mov sx to r0 and set ZV flags
\r
839 subs r6, r6, #1 @ width--
\r
840 ldmeqfd sp!, {r4-r9,r11,pc}@ return
\r
841 adds r0, r0, #8 @ sx+=8
\r
842 add r8, r8, r5 @ tile+=delta
\r
845 ble .dspr_loop @ sx <= 0
\r
847 ldmgefd sp!, {r4-r9,r11,pc}@ return
\r
849 mov r8, r8, lsl #17
\r
850 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address
\r
852 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
\r
853 add r1, r11, r0 @ r1=pdest
\r
857 cmp r12, r9, lsr #28
\r
861 beq .dspr_SingleColor @ tileline singlecolor
\r
866 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
878 orr r4, r4, r4, lsl #8
\r
879 tst r0, #1 @ not aligned?
\r
880 strneb r4, [r1], #1
\r
881 streqh r4, [r1], #2
\r
885 strneb r4, [r1], #1
\r
890 beq .dspr_singlec_sh
\r
893 beq .dspr_TileNorm_sh
\r
895 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
904 cmp r2, #0xe0000000
\r
905 bcc .dspr_SingleColor @ normal tileline
\r
906 tst r2, #0x10000000
\r
917 @ *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>24)&0xf);
\r
918 mov r4, r8, lsl #16 @ tile
\r
920 orrne r4, r4, #0x10000 @ code&0x0800
\r
921 mov r2, r2, lsl #22
\r
922 orr r4, r4, r2, lsr #16 @ (sx<<6)&0x0000ffc0
\r
923 and r2, r9, #0x6000
\r
924 orr r4, r4, r2, lsr #9 @ (code>>9)&0x30
\r
925 mov r3, r3, lsl #12
\r
927 orr r4, r4, r3, lsr #28 @ (sprite[0]>>24)&0xf
\r
932 ldmfd sp!, {r4-r9,r11,lr}
\r
935 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
937 .global DrawWindow @ int tstart, int tend, int prio, int sh // int *hcache
\r
940 stmfd sp!, {r4-r11,lr}
\r
942 ldr r11, =(Pico+0x22228) @ Pico.video
\r
944 ldrb r12, [r11, #3] @ pvid->reg[3]
\r
948 mov r5, r10, lsr #3
\r
950 mov r10, r10, lsl #1 @ r10=ty
\r
952 mov r12, r12, lsl #10
\r
954 tst r4, #1 @ 40 cell mode?
\r
955 andne r12, r12, #0xf000 @ 0x3c<<10
\r
956 andeq r12, r12, #0xf800
\r
957 addne r12, r12, r5, lsl #7
\r
958 addeq r12, r12, r5, lsl #6 @ nametab
\r
959 add r12, r12, r0, lsl #2 @ +starttile
\r
961 ldr r6, =rendstatus
\r
962 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
965 @ fetch the first code now
\r
968 ands r6, r6, #2 @ we care about bit 1 only
\r
970 bne .dw_no_sameprio
\r
972 cmp r2, r7, lsr #15
\r
973 ldmnefd sp!, {r4-r11,pc} @ assume that whole window uses same priority
\r
976 orr r6, r6, r3, lsl #8 @ shadow mode
\r
979 mov r8, r8, lsl #1 @ cells
\r
981 mvn r9, #0 @ r9=prevcode=-1
\r
983 @ cache some stuff to avoid mem access
\r
984 ldr r11,=(HighCol+8)
\r
985 add r1, r11, r0, lsl #4 @ r1=pdest
\r
989 @ r4,r5 & r7 are scratch in this loop
\r
993 add r12, r12, #2 @ halfwords
\r
994 ldrh r7, [lr, r12] @ r7=code (int, but from unsigned, no sign extend)
\r
996 beq .dwloop_end @ done
\r
998 eor r5, r6, r7, lsr #15
\r
1000 orrne r6, r6, #2 @ wrong pri
\r
1004 beq .dw_samecode @ we know stuff about this tile already
\r
1007 mov r9, r7 @ remember code
\r
1009 movs r2, r9, lsl #20 @ if (code&0x1000)
\r
1010 mov r2, r2, lsl #1
\r
1011 add r2, r10, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4; addr+=ty
\r
1012 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
\r
1014 and r3, r9, #0x6000
\r
1015 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
\r
1017 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
\r
1024 beq .dwloop @ tileline blank
\r
1026 cmp r2, r2, ror #4
\r
1027 beq .dw_SingleColor @ tileline singlecolor
\r
1032 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern
\r
1041 and r4, r0, r2 @ #0x0000000f
\r
1043 orr r4, r4, r4, lsl #8
\r
1044 orr r4, r4, r4, lsl #16
\r
1046 stmia r1!, {r4,r5}
\r
1047 b .dwloop_nor1 @ we incremeted r1 ourselves
\r
1050 tst r6, #1 @ hi pri?
\r
1051 orreq r3, r3, #0x40
\r
1052 beq .dw_shadow_done
\r
1054 tst r4, #0x00000080
\r
1055 biceq r4, r4, #0x000000c0
\r
1056 tst r4, #0x00008000
\r
1057 biceq r4, r4, #0x0000c000
\r
1058 tst r4, #0x00800000
\r
1059 biceq r4, r4, #0x00c00000
\r
1060 tst r4, #0x80000000
\r
1061 biceq r4, r4, #0xc0000000
\r
1064 tst r4, #0x00000080
\r
1065 biceq r4, r4, #0x000000c0
\r
1066 tst r4, #0x00008000
\r
1067 biceq r4, r4, #0x0000c000
\r
1068 tst r4, #0x00800000
\r
1069 biceq r4, r4, #0x00c00000
\r
1070 tst r4, #0x80000000
\r
1071 biceq r4, r4, #0xc0000000
\r
1076 ldr r0, =rendstatus
\r
1082 ldmfd sp!, {r4-r11,r12}
\r
1086 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1089 @ hilights 2 pixels in RGB444/BGR444 format
\r
1090 .macro TileDoShHi2Pixels444 reg
\r
1091 mov \reg, \reg, ror #12
\r
1092 adds \reg, \reg, #0x40000000
\r
1093 orrcs \reg, \reg, #0xf0000000
\r
1094 mov \reg, \reg, ror #28
\r
1095 adds \reg, \reg, #0x40000000
\r
1096 orrcs \reg, \reg, #0xf0000000
\r
1097 mov \reg, \reg, ror #28
\r
1098 adds \reg, \reg, #0x40000000
\r
1099 orrcs \reg, \reg, #0xf0000000
\r
1100 mov \reg, \reg, ror #24
\r
1101 adds \reg, \reg, #0x40000000
\r
1102 orrcs \reg, \reg, #0xf0000000
\r
1103 mov \reg, \reg, ror #28
\r
1104 adds \reg, \reg, #0x40000000
\r
1105 orrcs \reg, \reg, #0xf0000000
\r
1106 mov \reg, \reg, ror #28
\r
1107 adds \reg, \reg, #0x40000000
\r
1108 orrcs \reg, \reg, #0xf0000000
\r
1109 mov \reg, \reg, ror #12
\r
1113 .global FinalizeLineBGR444 @ int sh
\r
1115 FinalizeLineBGR444:
\r
1116 stmfd sp!, {r4-r6,lr}
\r
1118 ldr lr, =(Pico+0x22228) @ Pico.video
\r
1119 ldr r0, =DrawLineDest
\r
1120 ldrb r12, [lr, #12]
\r
1122 sub r3, lr, #0x128 @ r3=Pico.cram
\r
1125 movne r2, #320/4 @ len
\r
1126 bne .fl_no32colBGR444
\r
1131 addeq r0, r0, #32*2
\r
1133 .fl_no32colBGR444:
\r
1135 beq .fl_noshBGR444
\r
1139 ldrb r12, [lr, #-0x1a] @ 0x2220e ~ dirtyPal
\r
1142 beq .fl_noshBGR444
\r
1144 strb r12, [lr, #-0x1a]
\r
1149 ldmia r3!, {r1,r5,r6,r12}
\r
1151 stmia r4!, {r1,r5,r6,r12}
\r
1152 bne .fl_loopcpBGR444
\r
1154 @ shadowed pixels:
\r
1156 orr r12,r12,#0x0700
\r
1157 orr r12,r12,r12,lsl #16
\r
1158 sub r3, r3, #0x40*2
\r
1159 add r5, r4, #0x80*2
\r
1161 .fl_loopcpBGR444_sh:
\r
1162 ldmia r3!, {r1,r6}
\r
1164 and r1, r12, r1, lsr #1
\r
1165 and r6, r12, r6, lsr #1
\r
1166 stmia r4!, {r1,r6}
\r
1167 stmia r5!, {r1,r6}
\r
1168 bne .fl_loopcpBGR444_sh
\r
1170 @ hilighted pixels:
\r
1171 sub r3, r3, #0x40*2
\r
1173 .fl_loopcpBGR444_hi:
\r
1175 TileDoShHi2Pixels444 r1
\r
1178 bne .fl_loopcpBGR444_hi
\r
1180 sub r3, r4, #0x40*3*2
\r
1184 ldr r1, =(HighCol+8)
\r
1186 mov lr, lr, lsl #1
\r
1193 and r4, lr, r12, lsl #1
\r
1195 and r5, lr, r12, lsr #7
\r
1197 and r6, lr, r12, lsr #15
\r
1199 orr r4, r4, r5, lsl #16
\r
1201 and r5, lr, r12, lsr #23
\r
1202 ldrh r5, [r3, r5] @ 2c.i.
\r
1203 orr r5, r6, r5, lsl #16
\r
1205 stmia r0!, {r4,r5}
\r
1206 bne .fl_loopBGR444
\r
1209 ldmfd sp!, {r4-r6,lr}
\r
1213 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1216 @ hilights 2 pixels in RGB555/BGR555 format
\r
1217 .macro TileDoShHi2Pixels555 reg
\r
1218 adds \reg, \reg, #0x40000000
\r
1219 orrcs \reg, \reg, #0xf0000000
\r
1220 mov \reg, \reg, ror #27
\r
1221 adds \reg, \reg, #0x40000000
\r
1222 orrcs \reg, \reg, #0xf0000000
\r
1223 mov \reg, \reg, ror #26
\r
1224 adds \reg, \reg, #0x40000000
\r
1225 orrcs \reg, \reg, #0xf0000000
\r
1226 mov \reg, \reg, ror #27
\r
1227 adds \reg, \reg, #0x40000000
\r
1228 orrcs \reg, \reg, #0xf0000000
\r
1229 mov \reg, \reg, ror #27
\r
1230 adds \reg, \reg, #0x40000000
\r
1231 orrcs \reg, \reg, #0xf0000000
\r
1232 mov \reg, \reg, ror #26
\r
1233 adds \reg, \reg, #0x40000000
\r
1234 orrcs \reg, \reg, #0xf0000000
\r
1235 mov \reg, \reg, ror #27
\r
1239 @ Convert 0000bbb0 ggg0rrr0
\r
1240 @ to rrrrrggg gggbbbbb
\r
1242 @ r2,r3,r9 - scratch, lr = 0x001c001c, r8 = 0x00030003
\r
1243 .macro convRGB565 reg
\r
1244 and r2, lr, \reg,lsl #1
\r
1245 and r9, r8, \reg,lsr #2
\r
1246 orr r2, r2, r9 @ r2=red
\r
1247 and r3, lr, \reg,lsr #7
\r
1248 and r9, r8, \reg,lsr #10
\r
1249 orr r3, r3, r9 @ r3=blue
\r
1250 and \reg, \reg, lr, lsl #3
\r
1251 orr \reg, \reg, \reg,lsl #3 @ green
\r
1252 orr \reg, \reg, r2, lsl #11 @ add red back
\r
1253 orr \reg, \reg, r3 @ add blue back
\r
1256 vidConvCpyRGB565: @ void *to, void *from, int pixels
\r
1257 stmfd sp!, {r4-r9,lr}
\r
1259 mov r12, r2, lsr #3 @ repeats
\r
1260 mov lr, #0x001c0000
\r
1261 orr lr, lr, #0x01c @ lr == pattern 0x001c001c
\r
1262 mov r8, #0x00030000
\r
1263 orr r8, r8, #0x003 @ lr == pattern 0x001c001c
\r
1266 ldmia r1!, {r4-r7}
\r
1279 ldmfd sp!, {r4-r9,lr}
\r
1284 .global FinalizeLineRGB555 @ int sh
\r
1286 FinalizeLineRGB555:
\r
1287 stmfd sp!, {r4-r8,lr}
\r
1288 ldr r5, =(Pico+0x22228) @ Pico.video
\r
1291 ldrb r7, [r5, #-0x1a] @ 0x2220e ~ dirtyPal
\r
1295 beq .fl_noconvRGB555
\r
1296 strb r1, [r5, #-0x1a]
\r
1297 sub r1, r5, #0x128 @ r1=Pico.cram
\r
1300 bl vidConvCpyRGB565
\r
1303 ldrb r12, [r5, #12]
\r
1304 ldr r0, =DrawLineDest
\r
1308 movne r2, #320/8 @ len
\r
1309 bne .fl_no32colRGB555
\r
1314 addeq r0, r0, #32*2
\r
1316 .fl_no32colRGB555:
\r
1319 beq .fl_noshRGB555
\r
1321 beq .fl_noshRGB555
\r
1323 @ shadowed pixels:
\r
1325 orr r12,r12,#0x7300
\r
1326 orr r12,r12,r12,lsl #16
\r
1327 add r4, r3, #0x40*2
\r
1328 add r5, r3, #0xc0*2
\r
1330 .fl_loopcpRGB555_sh:
\r
1331 ldmia r3!, {r1,r6}
\r
1333 and r1, r12, r1, lsr #1
\r
1334 and r6, r12, r6, lsr #1
\r
1335 stmia r4!, {r1,r6}
\r
1336 stmia r5!, {r1,r6}
\r
1337 bne .fl_loopcpRGB555_sh
\r
1339 @ hilighted pixels:
\r
1340 sub r3, r3, #0x40*2
\r
1342 .fl_loopcpRGB555_hi:
\r
1344 TileDoShHi2Pixels555 r1
\r
1347 bne .fl_loopcpRGB555_hi
\r
1349 sub r3, r3, #0x40*2
\r
1353 ldr r1, =(HighCol+8)
\r
1355 mov lr, lr, lsl #1
\r
1362 and r4, lr, r12, lsl #1
\r
1364 and r5, lr, r12, lsr #7
\r
1366 and r6, lr, r12, lsr #15
\r
1368 orr r4, r4, r5, lsl #16
\r
1370 and r5, lr, r12, lsr #23
\r
1372 and r8, lr, r7, lsl #1
\r
1374 orr r5, r6, r5, lsl #16
\r
1376 and r6, lr, r7, lsr #7
\r
1378 and r12,lr, r7, lsr #15
\r
1379 ldrh r12,[r3, r12]
\r
1380 orr r8, r8, r6, lsl #16
\r
1382 and r6, lr, r7, lsr #23
\r
1383 ldrh r6, [r3, r6] @ 1 cycle interlock here (r6)
\r
1385 orr r12,r12, r6, lsl #16
\r
1387 stmia r0!, {r4,r5,r8,r12}
\r
1388 bne .fl_loopRGB555
\r
1391 ldmfd sp!, {r4-r8,lr}
\r
1394 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1397 .global blockcpy @ void *dst, void *src, size_t n
\r
1400 stmfd sp!, {r4,r5}
\r
1401 mov r2, r2, lsr #4
\r
1403 ldmia r1!, {r3-r5,r12}
\r
1405 stmia r0!, {r3-r5,r12}
\r
1407 ldmfd sp!, {r4,r5}
\r
1411 .global blockcpy_or @ void *dst, void *src, size_t n, int pat
\r
1414 stmfd sp!, {r4-r6}
\r
1415 orr r3, r3, r3, lsl #8
\r
1416 orr r3, r3, r3, lsl #16
\r
1417 mov r2, r2, lsr #4
\r
1419 ldmia r1!, {r4-r6,r12}
\r
1425 stmia r0!, {r4-r6,r12}
\r
1426 bne blockcpy_loop_or
\r
1427 ldmfd sp!, {r4-r6}
\r