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Cleaned up unaligned access.

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This commit is contained in:
Kevin Hartman 2015-02-21 17:20:08 -08:00
parent c7d1480ece
commit 05c098a9e7
2 changed files with 2 additions and 35 deletions
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18
src/core/mem_map_funcs.cpp
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@ -236,30 +236,12 @@ u8 Read8(const VAddr addr) {
u16 Read16(const VAddr addr) {
u16_le data = 0;
Read<u16_le>(data, addr);
// Check for 16-bit unaligned memory reads...
if (addr & 1) {
// TODO(bunnei): Implement 16-bit unaligned memory reads
LOG_ERROR(HW_Memory, "16-bit unaligned memory reads are not implemented!");
}
return (u16)data;
}
u32 Read32(const VAddr addr) {
u32_le data = 0;
Read<u32_le>(data, addr);
// Check for 32-bit unaligned memory reads...
if (addr & 3) {
// ARM allows for unaligned memory reads, however older ARM architectures read out memory
// from unaligned addresses in a shifted way. Our ARM CPU core (SkyEye) corrects for this,
// so therefore expects the memory to be read out in this manner.
// TODO(bunnei): Determine if this is necessary - perhaps it is OK to remove this from both
// SkyEye and here?
int shift = (addr & 3) * 8;
data = (data << shift) | (data >> (32 - shift));
}
return (u32)data;
}