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| author | David Guillen Fandos | 2021-03-23 19:05:35 +0100 |
|---|---|---|
| committer | David Guillen Fandos | 2021-03-23 19:09:56 +0100 |
| commit | 11ec213c99d5d22905ff82cf3fb26ba6a8adf290 (patch) | |
| tree | 0af3ed99246d3bdb2d2b22f1420bddf2fafba507 /cpu.c | |
| parent | 7e27010a3c08811e4ed04097e1961009c3fef8d7 (diff) | |
| download | picogpsp-11ec213c99d5d22905ff82cf3fb26ba6a8adf290.tar.gz picogpsp-11ec213c99d5d22905ff82cf3fb26ba6a8adf290.tar.bz2 picogpsp-11ec213c99d5d22905ff82cf3fb26ba6a8adf290.zip | |
Make ewram memory lineal
This saves a few cycles in MIPS and simplifies a bit the core.
Removed the write map, only affects interpreter performance very
minimally. Rewired ARM and x86 handlers to support direct access to
I/EWRAM (and VRAM on ARM) to compensate. Overall performance is slightly
better but code is cleaner and allows for further improvements in the
dynarecs.
Diffstat (limited to 'cpu.c')
| -rw-r--r-- | cpu.c | 30 |
1 files changed, 6 insertions, 24 deletions
@@ -1003,7 +1003,6 @@ const u32 psr_masks[16] = #define fast_write_memory(size, type, address, value) \ { \ - u8 *map; \ u32 _address = (address) & ~(aligned_address_mask##size & 0x03); \ if(_address < 0x10000000) \ { \ @@ -1011,17 +1010,9 @@ const u32 psr_masks[16] = memory_writes_##type++; \ } \ \ - if(((_address & aligned_address_mask##size) == 0) && \ - (map = memory_map_write[_address >> 15])) \ - { \ - *((type *)((u8 *)map + (_address & 0x7FFF))) = value; \ - } \ - else \ - { \ - cpu_alert = write_memory##size(_address, value); \ - if(cpu_alert) \ - goto alert; \ - } \ + cpu_alert = write_memory##size(_address, value); \ + if(cpu_alert) \ + goto alert; \ } \ #define load_aligned32(address, dest) \ @@ -1046,22 +1037,14 @@ const u32 psr_masks[16] = #define store_aligned32(address, value) \ { \ u32 _address = address; \ - u8 *map = memory_map_write[_address >> 15]; \ if(_address < 0x10000000) \ { \ memory_region_access_write_u32[_address >> 24]++; \ memory_writes_u32++; \ } \ - if(map) \ - { \ - address32(map, _address & 0x7FFF) = value; \ - } \ - else \ - { \ - cpu_alert = write_memory32(_address, value); \ - if(cpu_alert) \ - goto alert; \ - } \ + cpu_alert = write_memory32(_address, value); \ + if(cpu_alert) \ + goto alert; \ } \ #define load_memory_u8(address, dest) \ @@ -1647,7 +1630,6 @@ void raise_interrupt(irq_type irq_raised) #ifndef HAVE_DYNAREC u8 *memory_map_read [8 * 1024]; -u8 *memory_map_write[8 * 1024]; u16 palette_ram[512]; u16 palette_ram_converted[512]; #endif |