1 @ vim:filetype=armasm
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3 @ assembly "optimized" version of some funtions from draw.c
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4 @ this is highly specialized, be careful if changing related C code!
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6 @ (c) Copyright 2007, Grazvydas "notaz" Ignotas
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7 @ All Rights Reserved
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16 .extern DrawLineDest
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17 .extern DrawStripInterlace
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21 .macro TilePixel pat lsrr offs
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25 ands r4, \pat, r2, lsr #\lsrr
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28 strneb r4, [r1,#\offs]
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31 @ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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33 TilePixel \pat, 12, 0 @ #0x0000f000
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34 TilePixel \pat, 8, 1 @ #0x00000f00
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35 TilePixel \pat, 4, 2 @ #0x000000f0
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36 TilePixel \pat, 0, 3 @ #0x0000000f
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37 TilePixel \pat, 28, 4 @ #0xf0000000
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38 TilePixel \pat, 24, 5 @ #0x0f000000
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39 TilePixel \pat, 20, 6 @ #0x00f00000
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40 TilePixel \pat, 16, 7 @ #0x000f0000
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43 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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45 TilePixel \pat, 16, 0 @ #0x000f0000
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46 TilePixel \pat, 20, 1 @ #0x00f00000
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47 TilePixel \pat, 24, 2 @ #0x0f000000
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48 TilePixel \pat, 28, 3 @ #0xf0000000
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49 TilePixel \pat, 0, 4 @ #0x0000000f
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50 TilePixel \pat, 4, 5 @ #0x000000f0
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51 TilePixel \pat, 8, 6 @ #0x00000f00
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52 TilePixel \pat, 12, 7 @ #0x0000f000
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55 @ shadow/hilight mode
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57 @ this one is for hi priority layer
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58 .macro TilePixelShHP lsrr offs
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62 ands r4, r12, r2, lsr #\lsrr
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64 ldreqb r4, [r1,#\offs]
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66 strneb r4, [r1,#\offs]
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69 streqb r4, [r1,#\offs]
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72 @ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: register with helper pattern 0xf, touches r3 high bits
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74 TilePixelShHP 12, 0 @ #0x0000f000
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75 TilePixelShHP 8, 1 @ #0x00000f00
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76 TilePixelShHP 4, 2 @ #0x000000f0
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77 TilePixelShHP 0, 3 @ #0x0000000f
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78 TilePixelShHP 28, 4 @ #0xf0000000
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79 TilePixelShHP 24, 5 @ #0x0f000000
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80 TilePixelShHP 20, 6 @ #0x00f00000
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81 TilePixelShHP 16, 7 @ #0x000f0000
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84 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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86 TilePixelShHP 16, 0 @ #0x000f0000
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87 TilePixelShHP 20, 1 @ #0x00f00000
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88 TilePixelShHP 24, 2 @ #0x0f000000
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89 TilePixelShHP 28, 3 @ #0xf0000000
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90 TilePixelShHP 0, 4 @ #0x0000000f
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91 TilePixelShHP 4, 5 @ #0x000000f0
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92 TilePixelShHP 8, 6 @ #0x00000f00
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93 TilePixelShHP 12, 7 @ #0x0000f000
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97 @ TileSingleSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx; r12: helper pattern 0xf
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99 tst r0, #1 @ not aligned?
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105 strneb r4, [r1], #1
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106 streqh r4, [r1], #2
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118 strneb r4, [r1], #1
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121 @ TileSingleHi (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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122 .macro TileSingleHi
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123 tst r1, #1 @ not aligned?
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126 ldrneb r4, [r1], #1
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127 ldreqh r4, [r1], #2 @ 1ci
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129 bic r4, r4, r7, lsr #1
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131 strneb r4, [r1, #-3]
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132 streqh r4, [r1, #-4]
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134 bic r12, r12, r7, lsr #1
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136 strh r12, [r1, #-4]
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138 bic r4, r4, r7, lsr #1
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142 bic r12, r12, r7, lsr #1
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144 strh r12, [r1, #-2]
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145 bicne r4, r4, r7, lsr #1
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147 strneb r4, [r1], #1
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151 .macro TileDoShGenPixel shift ofs
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153 ands r4, r12, r2, lsr #\shift
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162 strb r4, [r1,#\ofs]
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165 ldrb r4, [r1,#\ofs] @ 2ci
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167 strb r4, [r1,#\ofs]
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170 ldrb r4, [r1,#\ofs] @ 2ci
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173 strb r4, [r1,#\ofs]
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177 @ TileFlipSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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179 TileDoShGenPixel 16, 0 @ #0x000f0000
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180 TileDoShGenPixel 20, 1 @ #0x00f00000
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181 TileDoShGenPixel 24, 2 @ #0x0f000000
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182 TileDoShGenPixel 28, 3 @ #0xf0000000
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183 TileDoShGenPixel 0, 4 @ #0x0000000f
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184 TileDoShGenPixel 4, 5 @ #0x000000f0
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185 TileDoShGenPixel 8, 6 @ #0x00000f00
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186 TileDoShGenPixel 12, 7 @ #0x0000f000
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189 @ TileNormSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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191 TileDoShGenPixel 12, 0 @ #0x0000f000
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192 TileDoShGenPixel 8, 1 @ #0x00000f00
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193 TileDoShGenPixel 4, 2 @ #0x000000f0
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194 TileDoShGenPixel 0, 3 @ #0x0000000f
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195 TileDoShGenPixel 28, 4 @ #0xf0000000
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196 TileDoShGenPixel 24, 5 @ #0x0f000000
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197 TileDoShGenPixel 20, 6 @ #0x00f00000
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198 TileDoShGenPixel 16, 7 @ #0x000f0000
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202 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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206 @ int nametab; // 0x00
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207 @ int line; // 0x04
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208 @ int hscroll; // 0x08
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209 @ int xmask; // 0x0C
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210 @ int *hc; // 0x10 (pointer to cache buffer)
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211 @ int cells; // 0x14
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214 @ int DrawLayer(int plane, int *hcache, int maxcells, int sh)
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216 .global DrawLayer @ int plane, int *hcache, int maxcells, int sh
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219 stmfd sp!, {r4-r11,lr}
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221 ldr r11, =(Pico+0x22228) @ Pico.video
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224 ldrb r7, [r11, #16] @ ??hh??ww
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226 mov r6, r1 @ hcache
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227 orr r9, r2, r3, lsl #31 @ r9=maxcells|(sh<<31)
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230 orr r1, r1, #0x00ff
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234 biclt r1, r1, #0xfc00
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235 biceq r1, r1, #0xfe00
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236 bicgt r1, r1, #0xff00 @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels
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240 subge r10, r10, #1 @ r10=shift[width] (5,6,6,7)
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243 mov r5, r8, lsl r10
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244 sub r5, r5, #1 @ r5=xmask
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248 ldreqb r12, [r11, #2]
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249 ldrneb r12, [r11, #4]
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251 ldr r2, =Scanline @ trying to make good use of pipeline here
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252 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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254 moveq r12, r12, lsl #10
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255 movne r12, r12, lsl #13
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256 and r12, r12, #(7<<13) @ r12=(ts->nametab<<1) (halfword compliant)
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258 ldrh r8, [r11, #12]
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259 ldrb r7, [r11, #11]
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262 mov r4, r8, lsr #8 @ pvid->reg[13]
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263 mov r4, r4, lsl #10 @ htab=pvid->reg[13]<<9; (halfwords)
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265 addne r4, r4, r2, lsl #2 @ htab+=Scanline<<1; // Offset by line
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267 biceq r4, r4, #0x1f @ htab&=~0xf; // Offset by tile
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268 add r4, r4, r0, lsl #1 @ htab+=plane
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269 bic r4, r4, #0x00ff0000 @ just in case
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270 ldrh r3, [lr, r4] @ r3=hscroll
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273 bne .DrawStrip_vsscroll
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275 @ Get vertical scroll value:
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276 add r7, lr, #0x012000
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277 add r7, r7, #0x000180 @ r7=Pico.vsram (Pico+0x22180)
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282 bne .DrawStrip_interlace
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285 movne r7, r7, lsr #16
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287 @ Find the line in the name table
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291 add r10, r10, #1 @ shift[width]++
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292 add r12, r12, r4, lsl r10 @ nametab+=(ts.line>>3)<<shift[width];
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294 @ 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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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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423 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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425 .DrawStrip_vsscroll:
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427 mov r8, r8, lsr #3 @ r8=tilex=(-ts->hscroll)>>3
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428 bic r8, r8, #0xff000000
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429 orr r8, r8, r5, lsl #25 @ r8=(xmask[31:25]|tilex[15:0])
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432 orr r5, r1, r10, lsl #24
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435 orr r5, r5, r4, lsl #16 @ r5=(shift_width[31:24]|scanline[23:16]|ymask[15:0])
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437 add r7, r1, #1 @ r7=dx=((ts->hscroll-1)&7)+1
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439 mov r10,r9, lsl #16
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441 orrne r10,r10, #0x8000
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444 orr r10,r10, #0xff000000 @ will be adjusted on entering loop
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445 orrne r10,r10, #1<<23 @ r10=(cells[31:24]|sh[23]|hi_not_empty[22]|cells_max[21:16]|plane[15]|ty[14:0])
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446 movne r3, #0x40 @ default to shadowed pal on sh mode
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448 mvn r9, #0 @ r9=prevcode=-1
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450 @ cache some stuff to avoid mem access
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453 add r1, r11, r7 @ r1=pdest
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456 subne r10,r10, #0x01000000 @ have hscroll, start with negative cell
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459 @ r4 & r7 are scratch in this loop
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462 .dsloop_vs: @ 40-41 times
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463 add r10,r10, #0x01000000
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464 and r4, r10, #0x003f0000
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465 cmp r4, r10, asr #8
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468 @ calc offset and read tileline code to r7, also calc ty
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469 add r7, lr, #0x012000
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470 add r7, r7, #0x000180 @ r7=Pico.vsram (Pico+0x22180)
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471 add r7, r7, r10,asr #23 @ vsram + ((cell&~1)<<1)
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473 tst r10,#0x8000 @ plane1?
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475 ldrh r7, [r7] @ r7=vscroll
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477 bic r10,r10,#0xff @ clear old ty
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478 and r4, r5, #0xff0000
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479 add r4, r4, r7, lsl #16
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480 and r4, r4, r5, lsl #16 @ r4=line<<16
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481 and r7, r4, #0x70000
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482 orr r10,r10,r7, lsr #15 @ new ty
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484 mov r4, r4, lsr #19
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485 mov r7, r5, lsr #24
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486 mov r4, r4, lsl r7 @ nametabadd
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488 and r7, r8, r8, lsr #25
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489 add r7, lr, r7, lsl #1 @ Pico.vram+((tilex&ts->xmask) as halfwords)
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490 add r7, r7, r4, lsl #1
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491 ldrh r7, [r7, r12] @ r7=code (int, but from unsigned, no sign extend)
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497 bne .DrawStrip_vs_hiprio
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500 beq .DrawStrip_vs_samecode @ we know stuff about this tile already
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502 mov r9, r7 @ remember code
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504 movs r2, r9, lsl #20 @ if (code&0x1000)
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506 add r2, r2, r10, lsl #17
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507 mov r2, r2, lsr #17
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508 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
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510 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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513 and r3, r9, #0x6000
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514 add r3, r7, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
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516 .DrawStrip_vs_samecode:
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518 beq .dsloop_vs @ tileline blank
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521 beq .DrawStrip_vs_SingleColor @ tileline singlecolor
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524 beq .DrawStrip_vs_TileNorm
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526 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern
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530 .DrawStrip_vs_TileNorm:
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534 .DrawStrip_vs_SingleColor:
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537 orr r4, r4, r4, lsl #8
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538 tst r1, #1 @ not aligned?
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539 strneb r4, [r1], #1
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540 streqh r4, [r1], #2
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544 strneb r4, [r1], #1 @ have a remaining unaligned pixel?
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547 .DrawStrip_vs_hiprio:
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548 tst r10, #0x00c00000
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549 beq .DrawStrip_vs_hiprio_maybempt
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551 orr r7, r7, r0, lsl #16
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552 orr r7, r7, r10, lsl #25 @ (ty<<25)
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554 eorne r7, r7, #7<<26 @ if(code&0x1000) cval^=7<<26;
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555 str r7, [r6], #4 @ cache hi priority tile
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559 .DrawStrip_vs_hiprio_maybempt:
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561 beq .dsloop_vs @ must've been empty, otherwise we wouldn't get here
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562 movs r2, r7, lsl #20 @ if (code&0x1000)
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564 add r2, r2, r10, lsl #17
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565 mov r2, r2, lsr #17
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566 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
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567 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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568 mov r9, r7 @ remember code
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570 orrne r10, r10, #1<<22
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571 bne .DrawStrip_vs_hiprio
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575 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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577 @ interlace mode 2? Sonic 2?
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578 .DrawStrip_interlace:
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580 moveq r7, r7, lsl #21
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581 movne r7, r7, lsl #5
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583 @ Find the line in the name table
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584 add r2, r7, r2, lsl #22 @ r2=(vscroll+(Scanline<<1))<<21 (11 bits);
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585 orr r1, r1, #0x80000000
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586 and r2, r2, r1, ror #10 @ &((ymask<<1)|1)<<21;
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587 mov r2, r2, lsr #21
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589 mov r12, r12, lsr #1 @ halfwords
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590 add r0, r12, r4, lsl r10 @ nametab+=(ts.line>>4)<<shift[width];
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594 stmia sp, {r0,r2,r3,r5,r6,r9}
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597 bl DrawStripInterlace @ struct TileStrip *ts
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600 ldmfd sp!, {r4-r11,lr}
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605 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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608 .global BackFill @ int reg7, int sh
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611 stmfd sp!, {r4-r9,lr}
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613 ldr lr, =(HighCol+8)
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615 mov r0, r0, lsl #26
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616 mov r0, r0, lsr #26
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617 orr r0, r0, r1, lsl #6
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618 orr r0, r0, r0, lsl #8
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619 orr r0, r0, r0, lsl #16
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630 stmia lr!, {r0-r7} @ 10*8*4
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641 ldmfd sp!, {r4-r9,r12}
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645 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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648 .global DrawTilesFromCache @ int *hc, int sh
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650 DrawTilesFromCache:
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651 stmfd sp!, {r4-r8,r11,lr}
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653 mvn r5, #0 @ r5=prevcode=-1
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656 @ cache some stuff to avoid mem access
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658 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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663 ldr r6, [r0], #4 @ read code
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664 movs r1, r6, lsr #16 @ r1=dx;
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665 ldmeqfd sp!, {r4-r8,r11,pc} @ dx is never zero, this must be a terminator, return
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666 bic r1, r1, #0xfe00
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667 add r1, r11, r1 @ r1=pdest
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669 mov r7, r6, lsl #16
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670 cmp r5, r7, lsr #16
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671 beq .dtfc_samecode @ if (code==prevcode)
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673 mov r5, r7, lsr #16
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675 mov r2, r5, lsl #21
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676 mov r2, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4;
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677 add r2, r2, r6, lsr #25 @ addr+=ty
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679 and r3, r5, #0x6000
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680 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
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682 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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692 beq .dtfc_SingleColor @ tileline singlecolor
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697 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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708 orr r4, r4, r4, lsl #8
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709 tst r1, #1 @ not aligned?
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710 strneb r4, [r1], #1
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711 streqh r4, [r1], #2
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715 strneb r4, [r1], #1 @ have a remaining unaligned pixel?
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720 beq .dtfc_shadow_blank
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723 beq .dtfc_SingleColor @ tileline singlecolor
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726 beq .dtfc_TileNormShHP
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728 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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732 .dtfc_TileNormShHP:
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736 .dtfc_shadow_blank:
\r
737 ldrb r4, [r1] @ 1ci
\r
744 andeq r12,r12,#0x3f
\r
752 andeq r12,r12,#0x3f
\r
760 andeq r12,r12,#0x3f
\r
767 andeq r12,r12,#0x3f
\r
774 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
777 .global DrawSpritesFromCache @ int *hc, int sh
\r
779 DrawSpritesFromCache:
\r
780 stmfd sp!, {r4-r11,lr}
\r
782 @ cache some stuff to avoid mem access
\r
784 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
785 mov r6, r1, lsl #31
\r
792 ldr r9, [r10], #4 @ read code
\r
793 bic r6, r6, #7 @ using pipeline
\r
795 ldmeqfd sp!, {r4-r11,pc}
\r
797 mov r4, r9, lsl #28
\r
798 orr r6, r6, r4, lsr #30
\r
799 add r6, r6, #1 @ r6=s1cc???? ... ?????www (s=shadow/hilight, cc=pal, w=width)
\r
802 add r5, r5, #1 @ r5=delta
\r
804 rsbne r5, r5, #0 @ Flip X
\r
807 mov r2, r9, lsr #17
\r
808 mov r8, r2, lsl #1 @ tile=((unsigned int)code>>17)<<1;
\r
810 and r3, r9, #0x30 @ r3=pal=(code&0x30);
\r
813 orr r6, r6, r3, lsl #24
\r
815 mov r0, r9, lsl #16
\r
816 mov r0, r0, asr #22 @ sx=(code<<16)>>22
\r
817 adds r0, r0, #0 @ set ZV
\r
818 b .dsfc_inloop_enter
\r
828 .dsfc_inloop_enter:
\r
833 mov r8, r8, lsl #17
\r
834 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address
\r
836 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(Pico.vram+tile); // Get 8 pixels
\r
837 add r1, r11, r0 @ r1=pdest
\r
841 cmp r12, r6, lsr #28
\r
845 beq .dsfc_SingleColor @ tileline singlecolor
\r
850 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
859 tst r0, #1 @ not aligned?
\r
862 orr r4, r4, r4, lsl #8
\r
863 strneb r4, [r1], #1
\r
864 streqh r4, [r1], #2
\r
868 strneb r4, [r1], #1
\r
873 beq .dsfc_singlec_sh
\r
876 beq .dsfc_TileNorm_sh
\r
878 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
887 cmp r2, #0xe0000000
\r
888 bcc .dsfc_SingleColor @ normal singlecolor tileline (carry inverted in ARM)
\r
889 tst r2, #0x10000000
\r
900 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
902 @ + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
\r
903 @ + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
\r
905 .global DrawSprite @ unsigned int *sprite, int **hc, int sh
\r
908 stmfd sp!, {r4-r9,r11,lr}
\r
910 ldr r3, [r0] @ sprite[0]
\r
912 mov r6, r3, lsr #28
\r
913 sub r6, r6, #1 @ r6=width-1 (inc later)
\r
914 mov r5, r3, lsr #24
\r
915 and r5, r5, #7 @ r5=height
\r
917 mov r4, r3, lsl #16 @ r4=sy<<16 (tmp)
\r
921 sub r7, r7, r4, asr #16 @ r7=row=Scanline-sy
\r
924 mov r2, r9, asr #16 @ r2=sx
\r
925 bic r9, r9, #0xfe000000
\r
926 orrne r9, r9, #1<<31 @ r9=code|(sh<<31)
\r
929 movne r4, r5, lsl #3
\r
931 subne r7, r4, r7 @ if (code&0x1000) row=(height<<3)-1-row; // Flip Y
\r
933 mov r8, r9, lsl #21
\r
934 mov r8, r8, lsr #21
\r
935 add r8, r8, r7, lsr #3 @ tile+=row>>3; // Tile number increases going down
\r
938 mlane r8, r5, r6, r8 @ if (code&0x0800) { tile+=delta*(width-1);
\r
939 rsbne r5, r5, #0 @ delta=-delta; } // r5=delta now
\r
943 add r8, r8, r7, lsl #1 @ tile+=(row&7)<<1; // Tile address
\r
946 bne .dspr_cache @ if(code&0x8000) // high priority - cache it
\r
948 @ cache some stuff to avoid mem access
\r
950 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
953 mov r5, r5, lsl #4 @ delta<<=4; // Delta of address
\r
954 and r4, r9, #0x6000
\r
955 orr r9, r9, r4, lsl #16
\r
956 orr r9, r9, #0x10000000 @ r9=scc1 ???? ... <code> (s=shadow/hilight, cc=pal)
\r
959 mov r3, r4, lsr #9 @ r3=pal=((code>>9)&0x30);
\r
960 orrne r3, r3, #0x40 @ shadow by default
\r
962 add r6, r6, #1 @ inc now
\r
963 adds r0, r2, #0 @ mov sx to r0 and set ZV flags
\r
967 subs r6, r6, #1 @ width--
\r
968 ldmeqfd sp!, {r4-r9,r11,pc}@ return
\r
969 adds r0, r0, #8 @ sx+=8
\r
970 add r8, r8, r5 @ tile+=delta
\r
973 ble .dspr_loop @ sx <= 0
\r
975 ldmgefd sp!, {r4-r9,r11,pc}@ return
\r
977 mov r8, r8, lsl #17
\r
978 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address
\r
980 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
\r
981 add r1, r11, r0 @ r1=pdest
\r
985 cmp r12, r9, lsr #28
\r
989 beq .dspr_SingleColor @ tileline singlecolor
\r
994 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
1003 .dspr_SingleColor:
\r
1006 orr r4, r4, r4, lsl #8
\r
1007 tst r0, #1 @ not aligned?
\r
1008 strneb r4, [r1], #1
\r
1009 streqh r4, [r1], #2
\r
1013 strneb r4, [r1], #1
\r
1017 cmp r2, r2, ror #4
\r
1018 beq .dspr_singlec_sh
\r
1021 beq .dspr_TileNorm_sh
\r
1023 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
1027 .dspr_TileNorm_sh:
\r
1032 cmp r2, #0xe0000000
\r
1033 bcc .dspr_SingleColor @ normal tileline
\r
1034 tst r2, #0x10000000
\r
1045 @ *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>24)&0xf);
\r
1046 mov r4, r8, lsl #16 @ tile
\r
1048 orrne r4, r4, #0x10000 @ code&0x0800
\r
1049 mov r2, r2, lsl #22
\r
1050 orr r4, r4, r2, lsr #16 @ (sx<<6)&0x0000ffc0
\r
1051 and r2, r9, #0x6000
\r
1052 orr r4, r4, r2, lsr #9 @ (code>>9)&0x30
\r
1053 mov r3, r3, lsl #12
\r
1055 orr r4, r4, r3, lsr #28 @ (sprite[0]>>24)&0xf
\r
1060 ldmfd sp!, {r4-r9,r11,lr}
\r
1063 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1065 .global DrawWindow @ int tstart, int tend, int prio, int sh // int *hcache
\r
1068 stmfd sp!, {r4-r11,lr}
\r
1070 ldr r11, =(Pico+0x22228) @ Pico.video
\r
1071 ldr r10, =Scanline
\r
1072 ldrb r12, [r11, #3] @ pvid->reg[3]
\r
1075 ldr r4, [r11, #12]
\r
1076 mov r5, r10, lsr #3
\r
1078 mov r10, r10, lsl #1 @ r10=ty
\r
1080 mov r12, r12, lsl #10
\r
1082 tst r4, #1 @ 40 cell mode?
\r
1083 andne r12, r12, #0xf000 @ 0x3c<<10
\r
1084 andeq r12, r12, #0xf800
\r
1085 addne r12, r12, r5, lsl #7
\r
1086 addeq r12, r12, r5, lsl #6 @ nametab
\r
1087 add r12, r12, r0, lsl #2 @ +starttile
\r
1089 ldr r6, =rendstatus
\r
1090 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
1093 @ fetch the first code now
\r
1094 ldrh r7, [lr, r12]
\r
1096 ands r6, r6, #2 @ we care about bit 1 only
\r
1098 bne .dw_no_sameprio
\r
1100 cmp r2, r7, lsr #15
\r
1101 ldmnefd sp!, {r4-r11,pc} @ assume that whole window uses same priority
\r
1104 orr r6, r6, r3, lsl #8 @ shadow mode
\r
1107 mov r8, r8, lsl #1 @ cells
\r
1109 mvn r9, #0 @ r9=prevcode=-1
\r
1111 @ cache some stuff to avoid mem access
\r
1112 ldr r11,=(HighCol+8)
\r
1113 add r1, r11, r0, lsl #4 @ r1=pdest
\r
1117 @ r4,r5 & r7 are scratch in this loop
\r
1121 add r12, r12, #2 @ halfwords
\r
1122 ldrh r7, [lr, r12] @ r7=code (int, but from unsigned, no sign extend)
\r
1124 beq .dwloop_end @ done
\r
1126 eor r5, r6, r7, lsr #15
\r
1128 orrne r6, r6, #2 @ wrong pri
\r
1132 beq .dw_samecode @ we know stuff about this tile already
\r
1135 mov r9, r7 @ remember code
\r
1137 movs r2, r9, lsl #20 @ if (code&0x1000)
\r
1138 mov r2, r2, lsl #1
\r
1139 add r2, r10, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4; addr+=ty
\r
1140 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
\r
1142 and r3, r9, #0x6000
\r
1143 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
\r
1145 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
\r
1152 beq .dwloop @ tileline blank
\r
1154 cmp r2, r2, ror #4
\r
1155 beq .dw_SingleColor @ tileline singlecolor
\r
1160 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern
\r
1169 and r4, r0, r2 @ #0x0000000f
\r
1171 orr r4, r4, r4, lsl #8
\r
1172 orr r4, r4, r4, lsl #16
\r
1174 stmia r1!, {r4,r5}
\r
1175 b .dwloop_nor1 @ we incremeted r1 ourselves
\r
1178 tst r6, #1 @ hi pri?
\r
1179 orreq r3, r3, #0x40
\r
1180 beq .dw_shadow_done
\r
1182 tst r4, #0x00000080
\r
1183 biceq r4, r4, #0x000000c0
\r
1184 tst r4, #0x00008000
\r
1185 biceq r4, r4, #0x0000c000
\r
1186 tst r4, #0x00800000
\r
1187 biceq r4, r4, #0x00c00000
\r
1188 tst r4, #0x80000000
\r
1189 biceq r4, r4, #0xc0000000
\r
1192 tst r4, #0x00000080
\r
1193 biceq r4, r4, #0x000000c0
\r
1194 tst r4, #0x00008000
\r
1195 biceq r4, r4, #0x0000c000
\r
1196 tst r4, #0x00800000
\r
1197 biceq r4, r4, #0x00c00000
\r
1198 tst r4, #0x80000000
\r
1199 biceq r4, r4, #0xc0000000
\r
1204 ldr r0, =rendstatus
\r
1210 ldmfd sp!, {r4-r11,r12}
\r
1214 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1217 @ hilights 2 pixels in RGB444/BGR444 format
\r
1218 .macro TileDoShHi2Pixels444 reg
\r
1219 mov \reg, \reg, ror #12
\r
1220 adds \reg, \reg, #0x40000000
\r
1221 orrcs \reg, \reg, #0xf0000000
\r
1222 mov \reg, \reg, ror #28
\r
1223 adds \reg, \reg, #0x40000000
\r
1224 orrcs \reg, \reg, #0xf0000000
\r
1225 mov \reg, \reg, ror #28
\r
1226 adds \reg, \reg, #0x40000000
\r
1227 orrcs \reg, \reg, #0xf0000000
\r
1228 mov \reg, \reg, ror #24
\r
1229 adds \reg, \reg, #0x40000000
\r
1230 orrcs \reg, \reg, #0xf0000000
\r
1231 mov \reg, \reg, ror #28
\r
1232 adds \reg, \reg, #0x40000000
\r
1233 orrcs \reg, \reg, #0xf0000000
\r
1234 mov \reg, \reg, ror #28
\r
1235 adds \reg, \reg, #0x40000000
\r
1236 orrcs \reg, \reg, #0xf0000000
\r
1237 mov \reg, \reg, ror #12
\r
1241 .global FinalizeLineBGR444 @ int sh
\r
1243 FinalizeLineBGR444:
\r
1244 stmfd sp!, {r4-r6,lr}
\r
1246 ldr lr, =(Pico+0x22228) @ Pico.video
\r
1247 ldr r0, =DrawLineDest
\r
1248 ldrb r12, [lr, #12]
\r
1250 sub r3, lr, #0x128 @ r3=Pico.cram
\r
1253 movne r2, #320/4 @ len
\r
1254 bne .fl_no32colBGR444
\r
1259 addeq r0, r0, #32*2
\r
1261 .fl_no32colBGR444:
\r
1263 beq .fl_noshBGR444
\r
1267 ldrb r12, [lr, #-0x1a] @ 0x2220e ~ dirtyPal
\r
1270 beq .fl_noshBGR444
\r
1272 strb r12, [lr, #-0x1a]
\r
1277 ldmia r3!, {r1,r5,r6,r12}
\r
1279 stmia r4!, {r1,r5,r6,r12}
\r
1280 bne .fl_loopcpBGR444
\r
1282 @ shadowed pixels:
\r
1284 orr r12,r12,#0x0700
\r
1285 orr r12,r12,r12,lsl #16
\r
1286 sub r3, r3, #0x40*2
\r
1287 add r5, r4, #0x80*2
\r
1289 .fl_loopcpBGR444_sh:
\r
1290 ldmia r3!, {r1,r6}
\r
1292 and r1, r12, r1, lsr #1
\r
1293 and r6, r12, r6, lsr #1
\r
1294 stmia r4!, {r1,r6}
\r
1295 stmia r5!, {r1,r6}
\r
1296 bne .fl_loopcpBGR444_sh
\r
1298 @ hilighted pixels:
\r
1299 sub r3, r3, #0x40*2
\r
1301 .fl_loopcpBGR444_hi:
\r
1303 TileDoShHi2Pixels444 r1
\r
1306 bne .fl_loopcpBGR444_hi
\r
1308 sub r3, r4, #0x40*3*2
\r
1312 ldr r1, =(HighCol+8)
\r
1314 mov lr, lr, lsl #1
\r
1321 and r4, lr, r12, lsl #1
\r
1323 and r5, lr, r12, lsr #7
\r
1325 and r6, lr, r12, lsr #15
\r
1327 orr r4, r4, r5, lsl #16
\r
1329 and r5, lr, r12, lsr #23
\r
1330 ldrh r5, [r3, r5] @ 2c.i.
\r
1331 orr r5, r6, r5, lsl #16
\r
1333 stmia r0!, {r4,r5}
\r
1334 bne .fl_loopBGR444
\r
1337 ldmfd sp!, {r4-r6,lr}
\r
1341 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1344 @ hilights 2 pixels in RGB555/BGR555 format
\r
1345 .macro TileDoShHi2Pixels555 reg
\r
1346 adds \reg, \reg, #0x40000000
\r
1347 orrcs \reg, \reg, #0xf0000000
\r
1348 mov \reg, \reg, ror #27
\r
1349 adds \reg, \reg, #0x40000000
\r
1350 orrcs \reg, \reg, #0xf0000000
\r
1351 mov \reg, \reg, ror #26
\r
1352 adds \reg, \reg, #0x40000000
\r
1353 orrcs \reg, \reg, #0xf0000000
\r
1354 mov \reg, \reg, ror #27
\r
1355 adds \reg, \reg, #0x40000000
\r
1356 orrcs \reg, \reg, #0xf0000000
\r
1357 mov \reg, \reg, ror #27
\r
1358 adds \reg, \reg, #0x40000000
\r
1359 orrcs \reg, \reg, #0xf0000000
\r
1360 mov \reg, \reg, ror #26
\r
1361 adds \reg, \reg, #0x40000000
\r
1362 orrcs \reg, \reg, #0xf0000000
\r
1363 mov \reg, \reg, ror #27
\r
1367 @ Convert 0000bbb0 ggg0rrr0
\r
1368 @ to rrrrrggg gggbbbbb
\r
1370 @ r2,r3,r9 - scratch, lr = 0x001c001c, r8 = 0x00030003
\r
1371 .macro convRGB565 reg
\r
1372 and r2, lr, \reg,lsl #1
\r
1373 and r9, r8, \reg,lsr #2
\r
1374 orr r2, r2, r9 @ r2=red
\r
1375 and r3, lr, \reg,lsr #7
\r
1376 and r9, r8, \reg,lsr #10
\r
1377 orr r3, r3, r9 @ r3=blue
\r
1378 and \reg, \reg, lr, lsl #3
\r
1379 orr \reg, \reg, \reg,lsl #3 @ green
\r
1380 orr \reg, \reg, r2, lsl #11 @ add red back
\r
1381 orr \reg, \reg, r3 @ add blue back
\r
1384 vidConvCpyRGB565: @ void *to, void *from, int pixels
\r
1385 stmfd sp!, {r4-r9,lr}
\r
1387 mov r12, r2, lsr #3 @ repeats
\r
1388 mov lr, #0x001c0000
\r
1389 orr lr, lr, #0x01c @ lr == pattern 0x001c001c
\r
1390 mov r8, #0x00030000
\r
1391 orr r8, r8, #0x003 @ lr == pattern 0x001c001c
\r
1394 ldmia r1!, {r4-r7}
\r
1407 ldmfd sp!, {r4-r9,lr}
\r
1412 .global FinalizeLineRGB555 @ int sh
\r
1414 FinalizeLineRGB555:
\r
1415 stmfd sp!, {r4-r8,lr}
\r
1416 ldr r8, =(Pico+0x22228) @ Pico.video
\r
1419 ldrb r7, [r8, #-0x1a] @ 0x2220e ~ dirtyPal
\r
1423 beq .fl_noconvRGB555
\r
1424 strb r1, [r8, #-0x1a]
\r
1425 sub r1, r8, #0x128 @ r1=Pico.cram
\r
1428 bl vidConvCpyRGB565
\r
1433 beq .fl_noshRGB555
\r
1435 beq .fl_noshRGB555
\r
1437 @ shadowed pixels:
\r
1439 orr r12,r12,#0x7300
\r
1440 orr r12,r12,r12,lsl #16
\r
1441 add r4, r3, #0x40*2
\r
1442 add r5, r3, #0xc0*2
\r
1444 .fl_loopcpRGB555_sh:
\r
1445 ldmia r3!, {r1,r6}
\r
1447 and r1, r12, r1, lsr #1
\r
1448 and r6, r12, r6, lsr #1
\r
1449 stmia r4!, {r1,r6}
\r
1450 stmia r5!, {r1,r6}
\r
1451 bne .fl_loopcpRGB555_sh
\r
1453 @ hilighted pixels:
\r
1454 sub r3, r3, #0x40*2
\r
1456 .fl_loopcpRGB555_hi:
\r
1458 TileDoShHi2Pixels555 r1
\r
1461 bne .fl_loopcpRGB555_hi
\r
1463 sub r3, r3, #0x40*2
\r
1466 ldr r0, =DrawLineDest
\r
1467 ldr r1, =(HighCol+8)
\r
1470 ldrb r12, [r8, #12]
\r
1472 mov lr, lr, lsl #1
\r
1475 movne r2, #320/8 @ len
\r
1476 bne .fl_no32colRGB555
\r
1481 bne .fl_32scale_RGB555
\r
1483 addeq r0, r0, #32*2
\r
1485 .fl_no32colRGB555:
\r
1491 and r4, lr, r12, lsl #1
\r
1493 and r5, lr, r12, lsr #7
\r
1495 and r6, lr, r12, lsr #15
\r
1497 orr r4, r4, r5, lsl #16
\r
1499 and r5, lr, r12, lsr #23
\r
1501 and r8, lr, r7, lsl #1
\r
1503 orr r5, r6, r5, lsl #16
\r
1505 and r6, lr, r7, lsr #7
\r
1507 and r12,lr, r7, lsr #15
\r
1508 ldrh r12,[r3, r12]
\r
1509 orr r8, r8, r6, lsl #16
\r
1511 and r6, lr, r7, lsr #23
\r
1512 ldrh r6, [r3, r6] @ 1 cycle interlock here (r6)
\r
1514 orr r12,r12, r6, lsl #16
\r
1516 stmia r0!, {r4,r5,r8,r12}
\r
1517 bne .fl_loopRGB555
\r
1519 ldmfd sp!, {r4-r8,lr}
\r
1523 .fl_32scale_RGB555:
\r
1524 stmfd sp!, {r9,r10}
\r
1525 mov r9, #0x3900 @ f800 07e0 001f | e000 0780 001c | 3800 01e0 0007
\r
1526 orr r9, r9, #0x00e7
\r
1528 .fl_loop32scale_RGB555:
\r
1532 and r4, lr, r12,lsl #1
\r
1534 and r5, lr, r12,lsr #7
\r
1536 and r4, r4, r9, lsl #2
\r
1537 orr r4, r4, r4, lsl #14 @ r4[31:16] = 1/4 pix_s 0
\r
1538 and r5, r5, r9, lsl #2
\r
1539 sub r6, r5, r5, lsr #2 @ r6 = 3/4 pix_s 1
\r
1540 add r4, r4, r6, lsl #16 @ pix_d 0, 1
\r
1541 and r6, lr, r12,lsr #15
\r
1543 and r12,lr, r12,lsr #23
\r
1544 ldrh r12,[r3, r12]
\r
1545 and r6, r6, r9, lsl #2
\r
1547 mov r5, r5, lsr #1
\r
1548 sub r6, r6, r6, lsr #2 @ r6 = 3/4 pix_s 2
\r
1549 orr r5, r5, r6, lsl #16
\r
1551 and r6, lr, r7, lsl #1
\r
1553 and r12,r12,r9, lsl #2
\r
1554 add r5, r5, r12,lsl #14 @ pix_d 2, 3
\r
1555 and r6, r6, r9, lsl #2
\r
1556 orr r6, r12,r6, lsl #16 @ pix_d 4, 5
\r
1558 and r12,lr, r7, lsr #7
\r
1559 ldrh r12,[r3, r12]
\r
1560 and r10,lr, r7, lsr #15
\r
1561 ldrh r10,[r3, r10]
\r
1562 and r12,r12,r9, lsl #2
\r
1563 sub r8, r12,r12,lsr #2 @ r8 = 3/4 pix_s 1
\r
1564 add r8, r8, r6, lsr #18
\r
1565 and r7, lr, r7, lsr #23
\r
1567 and r10,r10,r9, lsl #2
\r
1568 orr r8, r8, r10,lsl #15
\r
1569 add r8, r8, r12,lsl #15 @ pix_d 6, 7
\r
1570 sub r10,r10,r10,lsr #2 @ r10= 3/4 pix_s 2
\r
1571 and r7, r7, r9, lsl #2
\r
1572 add r10,r10,r7, lsr #2 @ += 1/4 pix_s 3
\r
1573 orr r10,r10,r7, lsl #16 @ pix_d 8, 9
\r
1577 stmia r0!, {r4,r5,r6,r8,r10}
\r
1578 bne .fl_loop32scale_RGB555
\r
1580 ldmfd sp!, {r9,r10}
\r
1581 ldmfd sp!, {r4-r8,lr}
\r
1585 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1588 .global blockcpy @ void *dst, void *src, size_t n
\r
1591 stmfd sp!, {r4,r5}
\r
1592 mov r2, r2, lsr #4
\r
1594 ldmia r1!, {r3-r5,r12}
\r
1596 stmia r0!, {r3-r5,r12}
\r
1598 ldmfd sp!, {r4,r5}
\r
1602 .global blockcpy_or @ void *dst, void *src, size_t n, int pat
\r
1605 stmfd sp!, {r4-r6}
\r
1606 orr r3, r3, r3, lsl #8
\r
1607 orr r3, r3, r3, lsl #16
\r
1608 mov r2, r2, lsr #4
\r
1610 ldmia r1!, {r4-r6,r12}
\r
1616 stmia r0!, {r4-r6,r12}
\r
1617 bne blockcpy_loop_or
\r
1618 ldmfd sp!, {r4-r6}
\r