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games/snes: fixed large sprite scrolling bug

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This commit is contained in:
aiju 2014-03-19 09:04:25 +01:00
parent da62091c07
commit 5b7ebd7be3
1 changed files with 13 additions and 0 deletions
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13
sys/src/games/snes/ppu.c
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@ -616,6 +616,14 @@ nope:
a = sp->t0 | (dy & 7) << 1;
if(dy >= 8)
a += (dy & ~7) << 6;
if(sp->x < 0 && (i = (-sp->x >> 3)) != 0){
if((sp->c & 0x40) != 0)
a -= i << 5;
else
a += i << 5;
nt -= i;
tp->sx += i << 3;
}
if((sp->c & 0x40) != 0){
a += sp->sx * 4;
for(i = 0; i < nt; i++){
@ -642,6 +650,11 @@ nope:
}else
over |= 0x80;
}
if(sp->x < 0 && (i = (-sp->x) & 7) != 0)
if((sp->c & 0x40) != 0)
*tp->ch >>= i;
else
*tp->ch <<= i;
}
reg[0x213e] = over;
}