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 DrawStripVSRam
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18 .extern DrawStripInterlace
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22 .macro TilePixel pat lsrr offs
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26 ands r4, \pat, r2, lsr #\lsrr
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29 strneb r4, [r1,#\offs]
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32 @ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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34 TilePixel \pat, 12, 0 @ #0x0000f000
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35 TilePixel \pat, 8, 1 @ #0x00000f00
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36 TilePixel \pat, 4, 2 @ #0x000000f0
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37 TilePixel \pat, 0, 3 @ #0x0000000f
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38 TilePixel \pat, 28, 4 @ #0xf0000000
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39 TilePixel \pat, 24, 5 @ #0x0f000000
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40 TilePixel \pat, 20, 6 @ #0x00f00000
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41 TilePixel \pat, 16, 7 @ #0x000f0000
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44 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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46 TilePixel \pat, 16, 0 @ #0x000f0000
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47 TilePixel \pat, 20, 1 @ #0x00f00000
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48 TilePixel \pat, 24, 2 @ #0x0f000000
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49 TilePixel \pat, 28, 3 @ #0xf0000000
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50 TilePixel \pat, 0, 4 @ #0x0000000f
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51 TilePixel \pat, 4, 5 @ #0x000000f0
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52 TilePixel \pat, 8, 6 @ #0x00000f00
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53 TilePixel \pat, 12, 7 @ #0x0000f000
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56 @ shadow/hilight mode
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58 @ this one is for hi priority layer
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59 .macro TilePixelShHP lsrr offs
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63 ands r4, r12, r2, lsr #\lsrr
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65 ldreqb r4, [r1,#\offs]
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67 strneb r4, [r1,#\offs]
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70 streqb r4, [r1,#\offs]
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73 @ TileNorm (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: register with helper pattern 0xf, touches r3 high bits
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75 TilePixelShHP 12, 0 @ #0x0000f000
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76 TilePixelShHP 8, 1 @ #0x00000f00
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77 TilePixelShHP 4, 2 @ #0x000000f0
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78 TilePixelShHP 0, 3 @ #0x0000000f
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79 TilePixelShHP 28, 4 @ #0xf0000000
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80 TilePixelShHP 24, 5 @ #0x0f000000
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81 TilePixelShHP 20, 6 @ #0x00f00000
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82 TilePixelShHP 16, 7 @ #0x000f0000
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85 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, pat: register with helper pattern 0xf
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87 TilePixelShHP 16, 0 @ #0x000f0000
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88 TilePixelShHP 20, 1 @ #0x00f00000
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89 TilePixelShHP 24, 2 @ #0x0f000000
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90 TilePixelShHP 28, 3 @ #0xf0000000
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91 TilePixelShHP 0, 4 @ #0x0000000f
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92 TilePixelShHP 4, 5 @ #0x000000f0
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93 TilePixelShHP 8, 6 @ #0x00000f00
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94 TilePixelShHP 12, 7 @ #0x0000f000
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98 @ TileSingleSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx; r12: helper pattern 0xf
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100 tst r0, #1 @ not aligned?
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106 strneb r4, [r1], #1
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107 streqh r4, [r1], #2
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119 strneb r4, [r1], #1
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122 @ TileSingleHi (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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123 .macro TileSingleHi
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124 tst r1, #1 @ not aligned?
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127 ldrneb r4, [r1], #1
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128 ldreqh r4, [r1], #2 @ 1ci
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130 bic r4, r4, r7, lsr #1
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132 strneb r4, [r1, #-3]
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133 streqh r4, [r1, #-4]
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135 bic r12, r12, r7, lsr #1
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137 strh r12, [r1, #-4]
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139 bic r4, r4, r7, lsr #1
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143 bic r12, r12, r7, lsr #1
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145 strh r12, [r1, #-2]
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146 bicne r4, r4, r7, lsr #1
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148 strneb r4, [r1], #1
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152 .macro TileDoShGenPixel shift ofs
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154 ands r4, r12, r2, lsr #\shift
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163 strb r4, [r1,#\ofs]
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166 ldrb r4, [r1,#\ofs] @ 2ci
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168 strb r4, [r1,#\ofs]
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171 ldrb r4, [r1,#\ofs] @ 2ci
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174 strb r4, [r1,#\ofs]
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178 @ TileFlipSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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180 TileDoShGenPixel 16, 0 @ #0x000f0000
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181 TileDoShGenPixel 20, 1 @ #0x00f00000
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182 TileDoShGenPixel 24, 2 @ #0x0f000000
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183 TileDoShGenPixel 28, 3 @ #0xf0000000
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184 TileDoShGenPixel 0, 4 @ #0x0000000f
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185 TileDoShGenPixel 4, 5 @ #0x000000f0
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186 TileDoShGenPixel 8, 6 @ #0x00000f00
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187 TileDoShGenPixel 12, 7 @ #0x0000f000
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190 @ TileNormSh (r1=pdest, r2=pixels8, r3=pal) r4,r7: scratch, r0=sx, r12: register with helper pattern 0xf
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192 TileDoShGenPixel 12, 0 @ #0x0000f000
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193 TileDoShGenPixel 8, 1 @ #0x00000f00
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194 TileDoShGenPixel 4, 2 @ #0x000000f0
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195 TileDoShGenPixel 0, 3 @ #0x0000000f
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196 TileDoShGenPixel 28, 4 @ #0xf0000000
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197 TileDoShGenPixel 24, 5 @ #0x0f000000
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198 TileDoShGenPixel 20, 6 @ #0x00f00000
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199 TileDoShGenPixel 16, 7 @ #0x000f0000
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203 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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207 @ int nametab; // 0x00
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208 @ int line; // 0x04
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209 @ int hscroll; // 0x08
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210 @ int xmask; // 0x0C
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211 @ int *hc; // 0x10 (pointer to cache buffer)
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212 @ int cells; // 0x14
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215 @ int DrawLayer(int plane, int *hcache, int maxcells, int sh)
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217 .global DrawLayer @ int plane, int *hcache, int maxcells, int sh
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220 stmfd sp!, {r4-r11,lr}
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222 ldr r11, =(Pico+0x22228) @ Pico.video
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225 ldrb r7, [r11, #16] @ ??hh??ww
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227 mov r6, r1 @ hcache
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228 orr r9, r2, r3, lsl #31 @ r9=maxcells|(sh<<31)
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231 orr r1, r1, #0x00ff
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235 biclt r1, r1, #0xfc00
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236 biceq r1, r1, #0xfe00
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237 bicgt r1, r1, #0xff00 @ r1=ymask=(height<<8)|0xff; ...; // Y Mask in pixels
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241 subge r10, r10, #1 @ r10=shift[width] (5,6,6,7)
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244 mov r5, r8, lsl r10
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245 sub r5, r5, #1 @ r5=xmask
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249 ldreqb r12, [r11, #2]
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250 ldrneb r12, [r11, #4]
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252 ldr r2, =Scanline @ trying to make good use of pipeline here
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253 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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255 moveq r12, r12, lsl #10
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256 movne r12, r12, lsl #13
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257 and r12, r12, #(7<<13) @ r12=(ts->nametab<<1) (halfword compliant)
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259 ldrh r8, [r11, #12]
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260 ldrb r7, [r11, #11]
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263 mov r4, r8, lsr #8 @ pvid->reg[13]
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264 mov r4, r4, lsl #10 @ htab=pvid->reg[13]<<9; (halfwords)
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266 addne r4, r4, r2, lsl #2 @ htab+=Scanline<<1; // Offset by line
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268 biceq r4, r4, #0x1f @ htab&=~0xf; // Offset by tile
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269 add r4, r4, r0, lsl #1 @ htab+=plane
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270 bic r4, r4, #0x00ff0000 @ just in case
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271 ldrh r3, [lr, r4] @ r3=hscroll
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274 bne .DrawStrip_vsscroll
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276 @ Get vertical scroll value:
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277 add r7, lr, #0x012000
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278 add r7, r7, #0x000180 @ r7=Pico.vsram (Pico+0x22180)
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283 bne .DrawStrip_interlace
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286 movne r7, r7, lsr #16
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288 @ Find the line in the name table
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292 add r10, r10, #1 @ shift[width]++
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293 add r12, r12, r4, lsl r10 @ nametab+=(ts.line>>3)<<shift[width];
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295 @ 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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296 @ mov r12,r1, lsl #1 @ r12=(ts->nametab<<1) (halfword compliant)
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299 mov r10,r10, lsl #1 @ r10=ty=(ts->line&7)<<1;
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300 orr r10,r10, r9, lsl #24
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303 mov r8, r8, lsr #3 @ r8=tilex=(-ts->hscroll)>>3
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307 add r7, r1, #1 @ r7=dx=((ts->hscroll-1)&7)+1
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311 orrne r10,r10, #1<<23 @ r10=(cells<<24|sh<<23|hi_not_empty<<22|ty)
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312 movne r3, #0x40 @ default to shadowed pal on sh mode
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314 mvn r9, #0 @ r9=prevcode=-1
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317 addne r10,r10, #0x01000000 @ we will loop cells+1 times if there is scroll
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319 @ cache some stuff to avoid mem access
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322 add r1, r11, r7 @ r1=pdest
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325 @ r4 & r7 are scratch in this loop
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328 .dsloop: @ 40-41 times
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329 subs r10,r10, #0x01000000
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334 add r7, lr, r7, lsl #1 @ Pico.vram+((tilex&ts->xmask) as halfwords)
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335 ldrh r7, [r7, r12] @ r7=code (int, but from unsigned, no sign extend)
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341 bne .DrawStrip_hiprio
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344 beq .DrawStrip_samecode @ we know stuff about this tile already
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346 mov r9, r7 @ remember code
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348 movs r2, r9, lsl #20 @ if (code&0x1000)
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350 add r2, r2, r10, lsl #17
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351 mov r2, r2, lsr #17
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352 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
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354 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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357 and r3, r9, #0x6000
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358 add r3, r7, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
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360 .DrawStrip_samecode:
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362 beq .dsloop @ tileline blank
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365 beq .DrawStrip_SingleColor @ tileline singlecolor
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368 beq .DrawStrip_TileNorm
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370 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern
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374 .DrawStrip_TileNorm:
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378 .DrawStrip_SingleColor:
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381 orr r4, r4, r4, lsl #8
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382 tst r1, #1 @ not aligned?
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383 strneb r4, [r1], #1
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384 streqh r4, [r1], #2
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388 strneb r4, [r1], #1 @ have a remaining unaligned pixel?
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392 tst r10, #0x00c00000
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393 beq .DrawStrip_hiprio_maybempt
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395 orr r7, r7, r0, lsl #16
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396 orr r7, r7, r10, lsl #25 @ (ty<<25)
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398 eorne r7, r7, #7<<26 @ if(code&0x1000) cval^=7<<26;
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399 str r7, [r6], #4 @ cache hi priority tile
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403 .DrawStrip_hiprio_maybempt:
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405 beq .dsloop @ must've been empty, otherwise we wouldn't get here
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406 movs r2, r7, lsl #20 @ if (code&0x1000)
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408 add r2, r2, r10, lsl #17
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409 mov r2, r2, lsr #17
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410 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
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411 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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412 mov r9, r7 @ remember code
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414 orrne r10, r10, #1<<22
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415 bne .DrawStrip_hiprio
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420 str r0, [r6] @ terminate the cache list
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422 ldmfd sp!, {r4-r11,lr}
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426 .DrawStrip_vsscroll:
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427 @ shit, we have 2-cell column based vscroll
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428 @ let the c code handle this (for now)
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430 @ int nametab; // 0x00
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431 @ int line; // 0x04
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432 @ int hscroll; // 0x08
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433 @ int xmask; // 0x0C
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434 @ int *hc; // 0x10 (pointer to cache buffer)
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435 @ int cells; // 0x14
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438 orr r2, r1, r10, lsl #24 @ ts.line=ymask|(shift[width]<<24); // save some stuff instead of line
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440 mov r0, r12, lsr #1 @ halfwords
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442 stmia sp, {r0,r2,r3,r5,r6,r9}
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445 bl DrawStripVSRam @ struct TileStrip *ts, int plane
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448 ldmfd sp!, {r4-r11,lr}
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451 @ interlace mode 2? Sonic 2?
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452 .DrawStrip_interlace:
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454 moveq r7, r7, lsl #21
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455 movne r7, r7, lsl #5
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457 @ Find the line in the name table
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458 add r2, r7, r2, lsl #22 @ r2=(vscroll+(Scanline<<1))<<21 (11 bits);
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459 orr r1, r1, #0x80000000
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460 and r2, r2, r1, ror #10 @ &((ymask<<1)|1)<<21;
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461 mov r2, r2, lsr #21
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463 mov r12, r12, lsr #1 @ halfwords
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464 add r0, r12, r4, lsl r10 @ nametab+=(ts.line>>4)<<shift[width];
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468 stmia sp, {r0,r2,r3,r5,r6,r9}
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471 bl DrawStripInterlace @ struct TileStrip *ts
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474 ldmfd sp!, {r4-r11,lr}
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479 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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482 .global BackFill @ int reg7, int sh
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485 stmfd sp!, {r4-r9,lr}
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487 ldr lr, =(HighCol+8)
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489 mov r0, r0, lsl #26
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490 mov r0, r0, lsr #26
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491 orr r0, r0, r1, lsl #6
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492 orr r0, r0, r0, lsl #8
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493 orr r0, r0, r0, lsl #16
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504 stmia lr!, {r0-r7} @ 10*8*4
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515 ldmfd sp!, {r4-r9,r12}
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519 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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522 .global DrawTilesFromCache @ int *hc, int sh
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524 DrawTilesFromCache:
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525 stmfd sp!, {r4-r8,r11,lr}
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527 mvn r5, #0 @ r5=prevcode=-1
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530 @ cache some stuff to avoid mem access
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532 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
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537 ldr r6, [r0], #4 @ read code
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538 movs r1, r6, lsr #16 @ r1=dx;
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539 ldmeqfd sp!, {r4-r8,r11,pc} @ dx is never zero, this must be a terminator, return
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540 bic r1, r1, #0xfe00
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541 add r1, r11, r1 @ r1=pdest
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543 mov r7, r6, lsl #16
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544 cmp r5, r7, lsr #16
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545 beq .dtfc_samecode @ if (code==prevcode)
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547 mov r5, r7, lsr #16
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549 mov r2, r5, lsl #21
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550 mov r2, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4;
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551 add r2, r2, r6, lsr #25 @ addr+=ty
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553 and r3, r5, #0x6000
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554 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
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556 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
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566 beq .dtfc_SingleColor @ tileline singlecolor
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571 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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582 orr r4, r4, r4, lsl #8
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583 tst r1, #1 @ not aligned?
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584 strneb r4, [r1], #1
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585 streqh r4, [r1], #2
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589 strneb r4, [r1], #1 @ have a remaining unaligned pixel?
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594 beq .dtfc_shadow_blank
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597 beq .dtfc_SingleColor @ tileline singlecolor
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600 beq .dtfc_TileNormShHP
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602 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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606 .dtfc_TileNormShHP:
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610 .dtfc_shadow_blank:
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611 ldrb r4, [r1] @ 1ci
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618 andeq r12,r12,#0x3f
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626 andeq r12,r12,#0x3f
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634 andeq r12,r12,#0x3f
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641 andeq r12,r12,#0x3f
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648 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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651 .global DrawSpritesFromCache @ int *hc, int sh
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653 DrawSpritesFromCache:
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654 stmfd sp!, {r4-r11,lr}
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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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659 mov r6, r1, lsl #31
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666 ldr r9, [r10], #4 @ read code
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667 bic r6, r6, #7 @ using pipeline
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669 ldmeqfd sp!, {r4-r11,pc}
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671 mov r4, r9, lsl #28
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672 orr r6, r6, r4, lsr #30
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673 add r6, r6, #1 @ r6=s1cc???? ... ?????www (s=shadow/hilight, cc=pal, w=width)
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676 add r5, r5, #1 @ r5=delta
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678 rsbne r5, r5, #0 @ Flip X
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681 mov r2, r9, lsr #17
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682 mov r8, r2, lsl #1 @ tile=((unsigned int)code>>17)<<1;
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684 and r3, r9, #0x30 @ r3=pal=(code&0x30);
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687 orr r6, r6, r3, lsl #24
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689 mov r0, r9, lsl #16
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690 mov r0, r0, asr #22 @ sx=(code<<16)>>22
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691 adds r0, r0, #0 @ set ZV
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692 b .dsfc_inloop_enter
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702 .dsfc_inloop_enter:
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707 mov r8, r8, lsl #17
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708 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address
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710 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(Pico.vram+tile); // Get 8 pixels
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711 add r1, r11, r0 @ r1=pdest
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715 cmp r12, r6, lsr #28
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719 beq .dsfc_SingleColor @ tileline singlecolor
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724 @ TileFlip (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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733 tst r0, #1 @ not aligned?
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736 orr r4, r4, r4, lsl #8
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737 strneb r4, [r1], #1
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738 streqh r4, [r1], #2
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742 strneb r4, [r1], #1
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747 beq .dsfc_singlec_sh
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750 beq .dsfc_TileNorm_sh
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752 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
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761 cmp r2, #0xe0000000
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762 bcc .dsfc_SingleColor @ normal singlecolor tileline (carry inverted in ARM)
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763 tst r2, #0x10000000
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774 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
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776 @ + 0 : hhhhvvvv ab--hhvv yyyyyyyy yyyyyyyy // a: offscreen h, b: offs. v, h: horiz. size
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777 @ + 4 : xxxxxxxx xxxxxxxx pccvhnnn nnnnnnnn // x: x coord + 8
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779 .global DrawSprite @ unsigned int *sprite, int **hc, int sh
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782 stmfd sp!, {r4-r9,r11,lr}
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784 ldr r3, [r0] @ sprite[0]
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786 mov r6, r3, lsr #28
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787 sub r6, r6, #1 @ r6=width-1 (inc later)
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788 mov r5, r3, lsr #24
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789 and r5, r5, #7 @ r5=height
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791 mov r4, r3, lsl #16 @ r4=sy<<16 (tmp)
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795 sub r7, r7, r4, asr #16 @ r7=row=Scanline-sy
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798 mov r2, r9, asr #16 @ r2=sx
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799 bic r9, r9, #0xfe000000
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800 orrne r9, r9, #1<<31 @ r9=code|(sh<<31)
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803 movne r4, r5, lsl #3
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805 subne r7, r4, r7 @ if (code&0x1000) row=(height<<3)-1-row; // Flip Y
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807 mov r8, r9, lsl #21
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808 mov r8, r8, lsr #21
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809 add r8, r8, r7, lsr #3 @ tile+=row>>3; // Tile number increases going down
\r
812 mlane r8, r5, r6, r8 @ if (code&0x0800) { tile+=delta*(width-1);
\r
813 rsbne r5, r5, #0 @ delta=-delta; } // r5=delta now
\r
817 add r8, r8, r7, lsl #1 @ tile+=(row&7)<<1; // Tile address
\r
820 bne .dspr_cache @ if(code&0x8000) // high priority - cache it
\r
822 @ cache some stuff to avoid mem access
\r
824 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
827 mov r5, r5, lsl #4 @ delta<<=4; // Delta of address
\r
828 and r4, r9, #0x6000
\r
829 orr r9, r9, r4, lsl #16
\r
830 orr r9, r9, #0x10000000 @ r9=scc1 ???? ... <code> (s=shadow/hilight, cc=pal)
\r
833 mov r3, r4, lsr #9 @ r3=pal=((code>>9)&0x30);
\r
834 orrne r3, r3, #0x40 @ shadow by default
\r
836 add r6, r6, #1 @ inc now
\r
837 adds r0, r2, #0 @ mov sx to r0 and set ZV flags
\r
841 subs r6, r6, #1 @ width--
\r
842 ldmeqfd sp!, {r4-r9,r11,pc}@ return
\r
843 adds r0, r0, #8 @ sx+=8
\r
844 add r8, r8, r5 @ tile+=delta
\r
847 ble .dspr_loop @ sx <= 0
\r
849 ldmgefd sp!, {r4-r9,r11,pc}@ return
\r
851 mov r8, r8, lsl #17
\r
852 mov r8, r8, lsr #17 @ tile&=0x7fff; // Clip tile address
\r
854 ldr r2, [lr, r8, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
\r
855 add r1, r11, r0 @ r1=pdest
\r
859 cmp r12, r9, lsr #28
\r
863 beq .dspr_SingleColor @ tileline singlecolor
\r
868 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
880 orr r4, r4, r4, lsl #8
\r
881 tst r0, #1 @ not aligned?
\r
882 strneb r4, [r1], #1
\r
883 streqh r4, [r1], #2
\r
887 strneb r4, [r1], #1
\r
892 beq .dspr_singlec_sh
\r
895 beq .dspr_TileNorm_sh
\r
897 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r12: helper pattern
\r
906 cmp r2, #0xe0000000
\r
907 bcc .dspr_SingleColor @ normal tileline
\r
908 tst r2, #0x10000000
\r
919 @ *(*hc)++ = (tile<<16)|((code&0x0800)<<5)|((sx<<6)&0x0000ffc0)|((code>>9)&0x30)|((sprite[0]>>24)&0xf);
\r
920 mov r4, r8, lsl #16 @ tile
\r
922 orrne r4, r4, #0x10000 @ code&0x0800
\r
923 mov r2, r2, lsl #22
\r
924 orr r4, r4, r2, lsr #16 @ (sx<<6)&0x0000ffc0
\r
925 and r2, r9, #0x6000
\r
926 orr r4, r4, r2, lsr #9 @ (code>>9)&0x30
\r
927 mov r3, r3, lsl #12
\r
929 orr r4, r4, r3, lsr #28 @ (sprite[0]>>24)&0xf
\r
934 ldmfd sp!, {r4-r9,r11,lr}
\r
937 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
939 .global DrawWindow @ int tstart, int tend, int prio, int sh // int *hcache
\r
942 stmfd sp!, {r4-r11,lr}
\r
944 ldr r11, =(Pico+0x22228) @ Pico.video
\r
946 ldrb r12, [r11, #3] @ pvid->reg[3]
\r
950 mov r5, r10, lsr #3
\r
952 mov r10, r10, lsl #1 @ r10=ty
\r
954 mov r12, r12, lsl #10
\r
956 tst r4, #1 @ 40 cell mode?
\r
957 andne r12, r12, #0xf000 @ 0x3c<<10
\r
958 andeq r12, r12, #0xf800
\r
959 addne r12, r12, r5, lsl #7
\r
960 addeq r12, r12, r5, lsl #6 @ nametab
\r
961 add r12, r12, r0, lsl #2 @ +starttile
\r
963 ldr r6, =rendstatus
\r
964 ldr lr, =(Pico+0x10000) @ lr=Pico.vram
\r
967 @ fetch the first code now
\r
970 ands r6, r6, #2 @ we care about bit 1 only
\r
972 bne .dw_no_sameprio
\r
974 cmp r2, r7, lsr #15
\r
975 ldmnefd sp!, {r4-r11,pc} @ assume that whole window uses same priority
\r
978 orr r6, r6, r3, lsl #8 @ shadow mode
\r
981 mov r8, r8, lsl #1 @ cells
\r
983 mvn r9, #0 @ r9=prevcode=-1
\r
985 @ cache some stuff to avoid mem access
\r
986 ldr r11,=(HighCol+8)
\r
987 add r1, r11, r0, lsl #4 @ r1=pdest
\r
991 @ r4,r5 & r7 are scratch in this loop
\r
995 add r12, r12, #2 @ halfwords
\r
996 ldrh r7, [lr, r12] @ r7=code (int, but from unsigned, no sign extend)
\r
998 beq .dwloop_end @ done
\r
1000 eor r5, r6, r7, lsr #15
\r
1002 orrne r6, r6, #2 @ wrong pri
\r
1006 beq .dw_samecode @ we know stuff about this tile already
\r
1009 mov r9, r7 @ remember code
\r
1011 movs r2, r9, lsl #20 @ if (code&0x1000)
\r
1012 mov r2, r2, lsl #1
\r
1013 add r2, r10, r2, lsr #17 @ r2=addr=(code&0x7ff)<<4; addr+=ty
\r
1014 eorcs r2, r2, #0x0e @ if (code&0x1000) addr^=0xe;
\r
1016 and r3, r9, #0x6000
\r
1017 mov r3, r3, lsr #9 @ r3=pal=((code&0x6000)>>9);
\r
1019 ldr r2, [lr, r2, lsl #1] @ pack=*(unsigned int *)(Pico.vram+addr); // Get 8 pixels
\r
1026 beq .dwloop @ tileline blank
\r
1028 cmp r2, r2, ror #4
\r
1029 beq .dw_SingleColor @ tileline singlecolor
\r
1034 @ (r1=pdest, r2=pixels8, r3=pal) r4: scratch, r0: helper pattern
\r
1043 and r4, r0, r2 @ #0x0000000f
\r
1045 orr r4, r4, r4, lsl #8
\r
1046 orr r4, r4, r4, lsl #16
\r
1048 stmia r1!, {r4,r5}
\r
1049 b .dwloop_nor1 @ we incremeted r1 ourselves
\r
1052 tst r6, #1 @ hi pri?
\r
1053 orreq r3, r3, #0x40
\r
1054 beq .dw_shadow_done
\r
1056 tst r4, #0x00000080
\r
1057 biceq r4, r4, #0x000000c0
\r
1058 tst r4, #0x00008000
\r
1059 biceq r4, r4, #0x0000c000
\r
1060 tst r4, #0x00800000
\r
1061 biceq r4, r4, #0x00c00000
\r
1062 tst r4, #0x80000000
\r
1063 biceq r4, r4, #0xc0000000
\r
1066 tst r4, #0x00000080
\r
1067 biceq r4, r4, #0x000000c0
\r
1068 tst r4, #0x00008000
\r
1069 biceq r4, r4, #0x0000c000
\r
1070 tst r4, #0x00800000
\r
1071 biceq r4, r4, #0x00c00000
\r
1072 tst r4, #0x80000000
\r
1073 biceq r4, r4, #0xc0000000
\r
1078 ldr r0, =rendstatus
\r
1084 ldmfd sp!, {r4-r11,r12}
\r
1088 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1091 @ hilights 2 pixels in RGB444/BGR444 format
\r
1092 .macro TileDoShHi2Pixels444 reg
\r
1093 mov \reg, \reg, ror #12
\r
1094 adds \reg, \reg, #0x40000000
\r
1095 orrcs \reg, \reg, #0xf0000000
\r
1096 mov \reg, \reg, ror #28
\r
1097 adds \reg, \reg, #0x40000000
\r
1098 orrcs \reg, \reg, #0xf0000000
\r
1099 mov \reg, \reg, ror #28
\r
1100 adds \reg, \reg, #0x40000000
\r
1101 orrcs \reg, \reg, #0xf0000000
\r
1102 mov \reg, \reg, ror #24
\r
1103 adds \reg, \reg, #0x40000000
\r
1104 orrcs \reg, \reg, #0xf0000000
\r
1105 mov \reg, \reg, ror #28
\r
1106 adds \reg, \reg, #0x40000000
\r
1107 orrcs \reg, \reg, #0xf0000000
\r
1108 mov \reg, \reg, ror #28
\r
1109 adds \reg, \reg, #0x40000000
\r
1110 orrcs \reg, \reg, #0xf0000000
\r
1111 mov \reg, \reg, ror #12
\r
1115 .global FinalizeLineBGR444 @ int sh
\r
1117 FinalizeLineBGR444:
\r
1118 stmfd sp!, {r4-r6,lr}
\r
1120 ldr lr, =(Pico+0x22228) @ Pico.video
\r
1121 ldr r0, =DrawLineDest
\r
1122 ldrb r12, [lr, #12]
\r
1124 sub r3, lr, #0x128 @ r3=Pico.cram
\r
1127 movne r2, #320/4 @ len
\r
1128 bne .fl_no32colBGR444
\r
1133 addeq r0, r0, #32*2
\r
1135 .fl_no32colBGR444:
\r
1137 beq .fl_noshBGR444
\r
1141 ldrb r12, [lr, #-0x1a] @ 0x2220e ~ dirtyPal
\r
1144 beq .fl_noshBGR444
\r
1146 strb r12, [lr, #-0x1a]
\r
1151 ldmia r3!, {r1,r5,r6,r12}
\r
1153 stmia r4!, {r1,r5,r6,r12}
\r
1154 bne .fl_loopcpBGR444
\r
1156 @ shadowed pixels:
\r
1158 orr r12,r12,#0x0700
\r
1159 orr r12,r12,r12,lsl #16
\r
1160 sub r3, r3, #0x40*2
\r
1161 add r5, r4, #0x80*2
\r
1163 .fl_loopcpBGR444_sh:
\r
1164 ldmia r3!, {r1,r6}
\r
1166 and r1, r12, r1, lsr #1
\r
1167 and r6, r12, r6, lsr #1
\r
1168 stmia r4!, {r1,r6}
\r
1169 stmia r5!, {r1,r6}
\r
1170 bne .fl_loopcpBGR444_sh
\r
1172 @ hilighted pixels:
\r
1173 sub r3, r3, #0x40*2
\r
1175 .fl_loopcpBGR444_hi:
\r
1177 TileDoShHi2Pixels444 r1
\r
1180 bne .fl_loopcpBGR444_hi
\r
1182 sub r3, r4, #0x40*3*2
\r
1186 ldr r1, =(HighCol+8)
\r
1188 mov lr, lr, lsl #1
\r
1195 and r4, lr, r12, lsl #1
\r
1197 and r5, lr, r12, lsr #7
\r
1199 and r6, lr, r12, lsr #15
\r
1201 orr r4, r4, r5, lsl #16
\r
1203 and r5, lr, r12, lsr #23
\r
1204 ldrh r5, [r3, r5] @ 2c.i.
\r
1205 orr r5, r6, r5, lsl #16
\r
1207 stmia r0!, {r4,r5}
\r
1208 bne .fl_loopBGR444
\r
1211 ldmfd sp!, {r4-r6,lr}
\r
1215 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1218 @ hilights 2 pixels in RGB555/BGR555 format
\r
1219 .macro TileDoShHi2Pixels555 reg
\r
1220 adds \reg, \reg, #0x40000000
\r
1221 orrcs \reg, \reg, #0xf0000000
\r
1222 mov \reg, \reg, ror #27
\r
1223 adds \reg, \reg, #0x40000000
\r
1224 orrcs \reg, \reg, #0xf0000000
\r
1225 mov \reg, \reg, ror #26
\r
1226 adds \reg, \reg, #0x40000000
\r
1227 orrcs \reg, \reg, #0xf0000000
\r
1228 mov \reg, \reg, ror #27
\r
1229 adds \reg, \reg, #0x40000000
\r
1230 orrcs \reg, \reg, #0xf0000000
\r
1231 mov \reg, \reg, ror #27
\r
1232 adds \reg, \reg, #0x40000000
\r
1233 orrcs \reg, \reg, #0xf0000000
\r
1234 mov \reg, \reg, ror #26
\r
1235 adds \reg, \reg, #0x40000000
\r
1236 orrcs \reg, \reg, #0xf0000000
\r
1237 mov \reg, \reg, ror #27
\r
1241 @ Convert 0000bbb0 ggg0rrr0
\r
1242 @ to rrrrrggg gggbbbbb
\r
1244 @ r2,r3,r9 - scratch, lr = 0x001c001c, r8 = 0x00030003
\r
1245 .macro convRGB565 reg
\r
1246 and r2, lr, \reg,lsl #1
\r
1247 and r9, r8, \reg,lsr #2
\r
1248 orr r2, r2, r9 @ r2=red
\r
1249 and r3, lr, \reg,lsr #7
\r
1250 and r9, r8, \reg,lsr #10
\r
1251 orr r3, r3, r9 @ r3=blue
\r
1252 and \reg, \reg, lr, lsl #3
\r
1253 orr \reg, \reg, \reg,lsl #3 @ green
\r
1254 orr \reg, \reg, r2, lsl #11 @ add red back
\r
1255 orr \reg, \reg, r3 @ add blue back
\r
1258 vidConvCpyRGB565: @ void *to, void *from, int pixels
\r
1259 stmfd sp!, {r4-r9,lr}
\r
1261 mov r12, r2, lsr #3 @ repeats
\r
1262 mov lr, #0x001c0000
\r
1263 orr lr, lr, #0x01c @ lr == pattern 0x001c001c
\r
1264 mov r8, #0x00030000
\r
1265 orr r8, r8, #0x003 @ lr == pattern 0x001c001c
\r
1268 ldmia r1!, {r4-r7}
\r
1281 ldmfd sp!, {r4-r9,lr}
\r
1286 .global FinalizeLineRGB555 @ int sh
\r
1288 FinalizeLineRGB555:
\r
1289 stmfd sp!, {r4-r8,lr}
\r
1290 ldr r8, =(Pico+0x22228) @ Pico.video
\r
1293 ldrb r7, [r8, #-0x1a] @ 0x2220e ~ dirtyPal
\r
1297 beq .fl_noconvRGB555
\r
1298 strb r1, [r8, #-0x1a]
\r
1299 sub r1, r8, #0x128 @ r1=Pico.cram
\r
1302 bl vidConvCpyRGB565
\r
1307 beq .fl_noshRGB555
\r
1309 beq .fl_noshRGB555
\r
1311 @ shadowed pixels:
\r
1313 orr r12,r12,#0x7300
\r
1314 orr r12,r12,r12,lsl #16
\r
1315 add r4, r3, #0x40*2
\r
1316 add r5, r3, #0xc0*2
\r
1318 .fl_loopcpRGB555_sh:
\r
1319 ldmia r3!, {r1,r6}
\r
1321 and r1, r12, r1, lsr #1
\r
1322 and r6, r12, r6, lsr #1
\r
1323 stmia r4!, {r1,r6}
\r
1324 stmia r5!, {r1,r6}
\r
1325 bne .fl_loopcpRGB555_sh
\r
1327 @ hilighted pixels:
\r
1328 sub r3, r3, #0x40*2
\r
1330 .fl_loopcpRGB555_hi:
\r
1332 TileDoShHi2Pixels555 r1
\r
1335 bne .fl_loopcpRGB555_hi
\r
1337 sub r3, r3, #0x40*2
\r
1340 ldr r0, =DrawLineDest
\r
1341 ldr r1, =(HighCol+8)
\r
1344 ldrb r12, [r8, #12]
\r
1346 mov lr, lr, lsl #1
\r
1349 movne r2, #320/8 @ len
\r
1350 bne .fl_no32colRGB555
\r
1355 bne .fl_32scale_RGB555
\r
1357 addeq r0, r0, #32*2
\r
1359 .fl_no32colRGB555:
\r
1365 and r4, lr, r12, lsl #1
\r
1367 and r5, lr, r12, lsr #7
\r
1369 and r6, lr, r12, lsr #15
\r
1371 orr r4, r4, r5, lsl #16
\r
1373 and r5, lr, r12, lsr #23
\r
1375 and r8, lr, r7, lsl #1
\r
1377 orr r5, r6, r5, lsl #16
\r
1379 and r6, lr, r7, lsr #7
\r
1381 and r12,lr, r7, lsr #15
\r
1382 ldrh r12,[r3, r12]
\r
1383 orr r8, r8, r6, lsl #16
\r
1385 and r6, lr, r7, lsr #23
\r
1386 ldrh r6, [r3, r6] @ 1 cycle interlock here (r6)
\r
1388 orr r12,r12, r6, lsl #16
\r
1390 stmia r0!, {r4,r5,r8,r12}
\r
1391 bne .fl_loopRGB555
\r
1393 ldmfd sp!, {r4-r8,lr}
\r
1397 .fl_32scale_RGB555:
\r
1398 stmfd sp!, {r9,r10}
\r
1399 mov r9, #0x3900 @ f800 07e0 001f | e000 0780 001c | 3800 01e0 0007
\r
1400 orr r9, r9, #0x00e7
\r
1402 .fl_loop32scale_RGB555:
\r
1406 and r4, lr, r12,lsl #1
\r
1408 and r5, lr, r12,lsr #7
\r
1410 and r4, r4, r9, lsl #2
\r
1411 orr r4, r4, r4, lsl #14 @ r4[31:16] = 1/4 pix_s 0
\r
1412 and r5, r5, r9, lsl #2
\r
1413 sub r6, r5, r5, lsr #2 @ r6 = 3/4 pix_s 1
\r
1414 add r4, r4, r6, lsl #16 @ pix_d 0, 1
\r
1415 and r6, lr, r12,lsr #15
\r
1417 and r12,lr, r12,lsr #23
\r
1418 ldrh r12,[r3, r12]
\r
1419 and r6, r6, r9, lsl #2
\r
1421 mov r5, r5, lsr #1
\r
1422 sub r6, r6, r6, lsr #2 @ r6 = 3/4 pix_s 2
\r
1423 orr r5, r5, r6, lsl #16
\r
1425 and r6, lr, r7, lsl #1
\r
1427 and r12,r12,r9, lsl #2
\r
1428 add r5, r5, r12,lsl #14 @ pix_d 2, 3
\r
1429 and r6, r6, r9, lsl #2
\r
1430 orr r6, r12,r6, lsl #16 @ pix_d 4, 5
\r
1432 and r12,lr, r7, lsr #7
\r
1433 ldrh r12,[r3, r12]
\r
1434 and r10,lr, r7, lsr #15
\r
1435 ldrh r10,[r3, r10]
\r
1436 and r12,r12,r9, lsl #2
\r
1437 sub r8, r12,r12,lsr #2 @ r8 = 3/4 pix_s 1
\r
1438 add r8, r8, r6, lsr #18
\r
1439 and r7, lr, r7, lsr #23
\r
1441 and r10,r10,r9, lsl #2
\r
1442 orr r8, r8, r10,lsl #15
\r
1443 add r8, r8, r12,lsl #15 @ pix_d 6, 7
\r
1444 sub r10,r10,r10,lsr #2 @ r10= 3/4 pix_s 2
\r
1445 and r7, r7, r9, lsl #2
\r
1446 add r10,r10,r7, lsr #2 @ += 1/4 pix_s 3
\r
1447 orr r10,r10,r7, lsl #16 @ pix_d 8, 9
\r
1451 stmia r0!, {r4,r5,r6,r8,r10}
\r
1452 bne .fl_loop32scale_RGB555
\r
1454 ldmfd sp!, {r9,r10}
\r
1455 ldmfd sp!, {r4-r8,lr}
\r
1459 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
\r
1462 .global blockcpy @ void *dst, void *src, size_t n
\r
1465 stmfd sp!, {r4,r5}
\r
1466 mov r2, r2, lsr #4
\r
1468 ldmia r1!, {r3-r5,r12}
\r
1470 stmia r0!, {r3-r5,r12}
\r
1472 ldmfd sp!, {r4,r5}
\r
1476 .global blockcpy_or @ void *dst, void *src, size_t n, int pat
\r
1479 stmfd sp!, {r4-r6}
\r
1480 orr r3, r3, r3, lsl #8
\r
1481 orr r3, r3, r3, lsl #16
\r
1482 mov r2, r2, lsr #4
\r
1484 ldmia r1!, {r4-r6,r12}
\r
1490 stmia r0!, {r4-r6,r12}
\r
1491 bne blockcpy_loop_or
\r
1492 ldmfd sp!, {r4-r6}
\r