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Try using memcpy4 for copying the tile data

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This commit is contained in:
Gwilym Inzani 2023-08-31 07:53:08 +01:00
parent d3c32ce351
commit 7431086b14
2 changed files with 12 additions and 8 deletions
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8
agb/src/agbabi/mod.rs
View file

@ -4,6 +4,14 @@ global_asm!(include_str!("macros.inc"));
global_asm!(include_str!("memcpy.s"));
global_asm!(include_str!("memset.s"));
extern "C" {
fn __aeabi_memcpy4(dest: *mut u32, src: *const u32, n: usize);
}
pub(crate) unsafe fn memcpy(dest: *mut u32, src: *const u32, n: usize) {
__aeabi_memcpy4(dest, src, n);
}
#[cfg(test)]
mod test {
mod memset {

12
agb/src/display/tiled/vram_manager.rs
View file

@ -4,6 +4,7 @@ use alloc::{slice, vec::Vec};
use crate::{
agb_alloc::{block_allocator::BlockAllocator, bump_allocator::StartEnd},
agbabi,
display::palette16,
dma::dma_copy16,
hash_map::{Entry, HashMap},
@ -380,17 +381,12 @@ impl VRamManager {
let tile_offset = (tile_id as usize) * tile_size;
let tile_slice = &tile_set.tiles[tile_offset..(tile_offset + tile_size)];
let tile_size_in_half_words = tile_slice.len() / 2;
let tile_size = tile_slice.len();
let target_location = tile_reference.0.as_ptr() as *mut _;
unsafe {
dma_copy16(
tile_slice.as_ptr() as *const u16,
target_location,
tile_size_in_half_words,
);
};
agbabi::memcpy(target_location, tile_slice.as_ptr() as *const _, tile_size);
}
}
/// Copies raw palettes to the background palette without any checks.