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replace math with bitswap

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This commit is contained in:
Andrei Holub 2025-01-10 09:48:46 -05:00
parent 900460f0d0
commit 1a7efbae8e
1 changed files with 1 additions and 5 deletions
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6
src/mame/sinclair/tsconf_m.cpp
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@ -386,11 +386,7 @@ void tsconf_state::ram_bank_write(u8 bank, offs_t offset, u8 data)
static int tiles_offset_to_raw(int t_offset)
{
const int x = (t_offset / 4) % 64;
const int y = (t_offset / 0x100) / 8;
const int dx = t_offset % 4;
const int dy = (t_offset / 0x100) % 8;
return ((y * 64 + x) * 64) + (dy * 8) + (dx * 2);
return bitswap<17>(t_offset, 16, 15, 14, 13, 12, 11, 7, 6, 5, 4, 3, 2, 10, 9, 8, 1, 0) << 1;
}
void tsconf_state::ram_page_write(u8 page, offs_t offset, u8 data)