Merge pull request #93 from davidgfnet/master

More cleanups (mostly whitespace and unused stuff)
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Autechre 2021-02-15 22:30:27 +01:00 committed by GitHub
commit 300d0c0028
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4 changed files with 431 additions and 465 deletions

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@ -3273,435 +3273,435 @@ block_exit_type block_exits[MAX_EXITS];
#define thumb_fix_pc() \
pc &= ~0x01 \
s32 translate_block_arm(u32 pc, translation_region_type
translation_region, u32 smc_enable)
{
u32 opcode = 0;
u32 last_opcode;
u32 condition;
u32 last_condition;
u32 pc_region = (pc >> 15);
u32 new_pc_region;
u8 *pc_address_block = memory_map_read[pc_region];
u32 block_start_pc = pc;
u32 block_end_pc = pc;
u32 block_exit_position = 0;
s32 block_data_position = 0;
u32 external_block_exit_position = 0;
u32 branch_target;
u32 cycle_count = 0;
u8 *translation_target;
u8 *backpatch_address = NULL;
u8 *translation_ptr = NULL;
u8 *translation_cache_limit = NULL;
s32 i;
u32 flag_status;
block_exit_type external_block_exits[MAX_EXITS];
generate_block_extra_vars_arm();
arm_fix_pc();
if(!pc_address_block)
pc_address_block = load_gamepak_page(pc_region & 0x3FF);
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc < iwram_code_min) || (iwram_code_min == 0xFFFFFFFF))
iwram_code_min = pc;
}
else
if(pc >= 0x2000000)
{
if((pc < ewram_code_min) || (ewram_code_min == 0xFFFFFFFF))
ewram_code_min = pc;
}
translation_ptr = ram_translation_ptr;
translation_cache_limit =
ram_translation_cache + RAM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_ROM:
translation_ptr = rom_translation_ptr;
translation_cache_limit =
rom_translation_cache + ROM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_BIOS:
translation_ptr = bios_translation_ptr;
translation_cache_limit = bios_translation_cache +
BIOS_TRANSLATION_CACHE_SIZE;
break;
}
generate_block_prologue();
/* This is a function because it's used a lot more than it might seem (all
of the data processing functions can access it), and its expansion was
massacreing the compiler. */
if(smc_enable)
{
scan_block(arm, yes);
}
else
{
scan_block(arm, no);
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target > block_start_pc) &&
(branch_target < block_end_pc))
{
block_data[(branch_target - block_start_pc) /
arm_instruction_width].update_cycles = 1;
}
}
arm_dead_flag_eliminate();
block_exit_position = 0;
block_data_position = 0;
last_condition = 0x0E;
while(pc != block_end_pc)
{
block_data[block_data_position].block_offset = translation_ptr;
s32 translate_block_arm(u32 pc, translation_region_type
translation_region, u32 smc_enable)
{
u32 opcode = 0;
u32 last_opcode;
u32 condition;
u32 last_condition;
u32 pc_region = (pc >> 15);
u32 new_pc_region;
u8 *pc_address_block = memory_map_read[pc_region];
u32 block_start_pc = pc;
u32 block_end_pc = pc;
u32 block_exit_position = 0;
s32 block_data_position = 0;
u32 external_block_exit_position = 0;
u32 branch_target;
u32 cycle_count = 0;
u8 *translation_target;
u8 *backpatch_address = NULL;
u8 *translation_ptr = NULL;
u8 *translation_cache_limit = NULL;
s32 i;
u32 flag_status;
block_exit_type external_block_exits[MAX_EXITS];
generate_block_extra_vars_arm();
arm_fix_pc();
if(!pc_address_block)
pc_address_block = load_gamepak_page(pc_region & 0x3FF);
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc < iwram_code_min) || (iwram_code_min == 0xFFFFFFFF))
iwram_code_min = pc;
}
else
if(pc >= 0x2000000)
{
if((pc < ewram_code_min) || (ewram_code_min == 0xFFFFFFFF))
ewram_code_min = pc;
}
translation_ptr = ram_translation_ptr;
translation_cache_limit =
ram_translation_cache + RAM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_ROM:
translation_ptr = rom_translation_ptr;
translation_cache_limit =
rom_translation_cache + ROM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_BIOS:
translation_ptr = bios_translation_ptr;
translation_cache_limit = bios_translation_cache +
BIOS_TRANSLATION_CACHE_SIZE;
break;
}
generate_block_prologue();
/* This is a function because it's used a lot more than it might seem (all
of the data processing functions can access it), and its expansion was
massacreing the compiler. */
if(smc_enable)
{
scan_block(arm, yes);
}
else
{
scan_block(arm, no);
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target > block_start_pc) &&
(branch_target < block_end_pc))
{
block_data[(branch_target - block_start_pc) /
arm_instruction_width].update_cycles = 1;
}
}
arm_dead_flag_eliminate();
block_exit_position = 0;
block_data_position = 0;
last_condition = 0x0E;
while(pc != block_end_pc)
{
block_data[block_data_position].block_offset = translation_ptr;
arm_base_cycles();
translate_arm_instruction();
block_data_position++;
/* If it went too far the cache needs to be flushed and the process
restarted. Because we might already be nested several stages in
a simple recursive call here won't work, it has to pedal out to
the beginning. */
if(translation_ptr > translation_cache_limit)
{
translation_flush_count++;
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
flush_translation_cache_ram();
break;
case TRANSLATION_REGION_ROM:
flush_translation_cache_rom();
break;
case TRANSLATION_REGION_BIOS:
flush_translation_cache_bios();
break;
}
return -1;
}
/* If the next instruction is a block entry point update the
cycle counter and update */
if(block_data[block_data_position].update_cycles == 1)
{
generate_cycle_update();
}
}
for(i = 0; i < translation_gate_targets; i++)
{
if(pc == translation_gate_target_pc[i])
{
generate_translation_gate(arm);
break;
}
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target >= block_start_pc) && (branch_target < block_end_pc))
{
/* Internal branch, patch to recorded address */
translation_target =
block_data[(branch_target - block_start_pc) /
arm_instruction_width].block_offset;
generate_branch_patch_unconditional(block_exits[i].branch_source,
translation_target);
}
else
{
/* External branch, save for later */
external_block_exits[external_block_exit_position].branch_target =
branch_target;
external_block_exits[external_block_exit_position].branch_source =
block_exits[i].branch_source;
external_block_exit_position++;
}
}
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc > iwram_code_max) || (iwram_code_max == 0xFFFFFFFF))
iwram_code_max = pc;
}
else
if(pc >= 0x2000000)
{
if((pc > ewram_code_max) || (ewram_code_max == 0xFFFFFFFF))
ewram_code_max = pc;
}
ram_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_ROM:
rom_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_BIOS:
bios_translation_ptr = translation_ptr;
break;
}
for(i = 0; i < external_block_exit_position; i++)
{
branch_target = external_block_exits[i].branch_target;
arm_link_block();
if(!translation_target){
translate_arm_instruction();
block_data_position++;
/* If it went too far the cache needs to be flushed and the process
restarted. Because we might already be nested several stages in
a simple recursive call here won't work, it has to pedal out to
the beginning. */
if(translation_ptr > translation_cache_limit)
{
translation_flush_count++;
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
flush_translation_cache_ram();
break;
case TRANSLATION_REGION_ROM:
flush_translation_cache_rom();
break;
case TRANSLATION_REGION_BIOS:
flush_translation_cache_bios();
break;
}
return -1;
}
/* If the next instruction is a block entry point update the
cycle counter and update */
if(block_data[block_data_position].update_cycles == 1)
{
generate_cycle_update();
}
}
for(i = 0; i < translation_gate_targets; i++)
{
if(pc == translation_gate_target_pc[i])
{
generate_translation_gate(arm);
break;
}
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target >= block_start_pc) && (branch_target < block_end_pc))
{
/* Internal branch, patch to recorded address */
translation_target =
block_data[(branch_target - block_start_pc) /
arm_instruction_width].block_offset;
generate_branch_patch_unconditional(block_exits[i].branch_source,
translation_target);
}
else
{
/* External branch, save for later */
external_block_exits[external_block_exit_position].branch_target =
branch_target;
external_block_exits[external_block_exit_position].branch_source =
block_exits[i].branch_source;
external_block_exit_position++;
}
}
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc > iwram_code_max) || (iwram_code_max == 0xFFFFFFFF))
iwram_code_max = pc;
}
else
if(pc >= 0x2000000)
{
if((pc > ewram_code_max) || (ewram_code_max == 0xFFFFFFFF))
ewram_code_max = pc;
}
ram_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_ROM:
rom_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_BIOS:
bios_translation_ptr = translation_ptr;
break;
}
for(i = 0; i < external_block_exit_position; i++)
{
branch_target = external_block_exits[i].branch_target;
arm_link_block();
if(!translation_target){
return -1;
}
generate_branch_patch_unconditional(
external_block_exits[i].branch_source, translation_target);
}
return 0;
}
generate_branch_patch_unconditional(
external_block_exits[i].branch_source, translation_target);
}
return 0;
}
s32 translate_block_thumb(u32 pc, translation_region_type
translation_region, u32 smc_enable)
{
u32 opcode = 0;
u32 last_opcode;
u32 condition;
u32 last_condition;
u32 pc_region = (pc >> 15);
u32 new_pc_region;
u8 *pc_address_block = memory_map_read[pc_region];
u32 block_start_pc = pc;
u32 block_end_pc = pc;
u32 block_exit_position = 0;
s32 block_data_position = 0;
u32 external_block_exit_position = 0;
u32 branch_target;
u32 cycle_count = 0;
u8 *translation_target;
u8 *backpatch_address = NULL;
u8 *translation_ptr = NULL;
u8 *translation_cache_limit = NULL;
s32 i;
u32 flag_status;
block_exit_type external_block_exits[MAX_EXITS];
generate_block_extra_vars_thumb();
thumb_fix_pc();
if(!pc_address_block)
pc_address_block = load_gamepak_page(pc_region & 0x3FF);
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc < iwram_code_min) || (iwram_code_min == 0xFFFFFFFF))
iwram_code_min = pc;
}
else
if(pc >= 0x2000000)
{
if((pc < ewram_code_min) || (ewram_code_min == 0xFFFFFFFF))
ewram_code_min = pc;
}
translation_ptr = ram_translation_ptr;
translation_cache_limit =
ram_translation_cache + RAM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_ROM:
translation_ptr = rom_translation_ptr;
translation_cache_limit =
rom_translation_cache + ROM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_BIOS:
translation_ptr = bios_translation_ptr;
translation_cache_limit = bios_translation_cache +
BIOS_TRANSLATION_CACHE_SIZE;
break;
}
generate_block_prologue();
/* This is a function because it's used a lot more than it might seem (all
of the data processing functions can access it), and its expansion was
massacreing the compiler. */
if(smc_enable)
{
scan_block(thumb, yes);
}
else
{
scan_block(thumb, no);
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target > block_start_pc) &&
(branch_target < block_end_pc))
{
block_data[(branch_target - block_start_pc) /
thumb_instruction_width].update_cycles = 1;
}
}
thumb_dead_flag_eliminate();
block_exit_position = 0;
block_data_position = 0;
last_condition = 0x0E;
while(pc != block_end_pc)
{
block_data[block_data_position].block_offset = translation_ptr;
s32 translate_block_thumb(u32 pc, translation_region_type
translation_region, u32 smc_enable)
{
u32 opcode = 0;
u32 last_opcode;
u32 condition;
u32 last_condition;
u32 pc_region = (pc >> 15);
u32 new_pc_region;
u8 *pc_address_block = memory_map_read[pc_region];
u32 block_start_pc = pc;
u32 block_end_pc = pc;
u32 block_exit_position = 0;
s32 block_data_position = 0;
u32 external_block_exit_position = 0;
u32 branch_target;
u32 cycle_count = 0;
u8 *translation_target;
u8 *backpatch_address = NULL;
u8 *translation_ptr = NULL;
u8 *translation_cache_limit = NULL;
s32 i;
u32 flag_status;
block_exit_type external_block_exits[MAX_EXITS];
generate_block_extra_vars_thumb();
thumb_fix_pc();
if(!pc_address_block)
pc_address_block = load_gamepak_page(pc_region & 0x3FF);
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc < iwram_code_min) || (iwram_code_min == 0xFFFFFFFF))
iwram_code_min = pc;
}
else
if(pc >= 0x2000000)
{
if((pc < ewram_code_min) || (ewram_code_min == 0xFFFFFFFF))
ewram_code_min = pc;
}
translation_ptr = ram_translation_ptr;
translation_cache_limit =
ram_translation_cache + RAM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_ROM:
translation_ptr = rom_translation_ptr;
translation_cache_limit =
rom_translation_cache + ROM_TRANSLATION_CACHE_SIZE -
TRANSLATION_CACHE_LIMIT_THRESHOLD;
break;
case TRANSLATION_REGION_BIOS:
translation_ptr = bios_translation_ptr;
translation_cache_limit = bios_translation_cache +
BIOS_TRANSLATION_CACHE_SIZE;
break;
}
generate_block_prologue();
/* This is a function because it's used a lot more than it might seem (all
of the data processing functions can access it), and its expansion was
massacreing the compiler. */
if(smc_enable)
{
scan_block(thumb, yes);
}
else
{
scan_block(thumb, no);
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target > block_start_pc) &&
(branch_target < block_end_pc))
{
block_data[(branch_target - block_start_pc) /
thumb_instruction_width].update_cycles = 1;
}
}
thumb_dead_flag_eliminate();
block_exit_position = 0;
block_data_position = 0;
last_condition = 0x0E;
while(pc != block_end_pc)
{
block_data[block_data_position].block_offset = translation_ptr;
thumb_base_cycles();
translate_thumb_instruction();
block_data_position++;
/* If it went too far the cache needs to be flushed and the process
restarted. Because we might already be nested several stages in
a simple recursive call here won't work, it has to pedal out to
the beginning. */
if(translation_ptr > translation_cache_limit)
{
translation_flush_count++;
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
flush_translation_cache_ram();
break;
case TRANSLATION_REGION_ROM:
flush_translation_cache_rom();
break;
case TRANSLATION_REGION_BIOS:
flush_translation_cache_bios();
break;
}
return -1;
}
/* If the next instruction is a block entry point update the
cycle counter and update */
if(block_data[block_data_position].update_cycles == 1)
{
generate_cycle_update();
}
}
for(i = 0; i < translation_gate_targets; i++)
{
if(pc == translation_gate_target_pc[i])
{
generate_translation_gate(thumb);
break;
}
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target >= block_start_pc) && (branch_target < block_end_pc))
{
/* Internal branch, patch to recorded address */
translation_target =
block_data[(branch_target - block_start_pc) /
thumb_instruction_width].block_offset;
generate_branch_patch_unconditional(block_exits[i].branch_source,
translation_target);
}
else
{
/* External branch, save for later */
external_block_exits[external_block_exit_position].branch_target =
branch_target;
external_block_exits[external_block_exit_position].branch_source =
block_exits[i].branch_source;
external_block_exit_position++;
}
}
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc > iwram_code_max) || (iwram_code_max == 0xFFFFFFFF))
iwram_code_max = pc;
}
else
if(pc >= 0x2000000)
{
if((pc > ewram_code_max) || (ewram_code_max == 0xFFFFFFFF))
ewram_code_max = pc;
}
ram_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_ROM:
rom_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_BIOS:
bios_translation_ptr = translation_ptr;
break;
}
for(i = 0; i < external_block_exit_position; i++)
{
branch_target = external_block_exits[i].branch_target;
thumb_link_block();
if(!translation_target){
return -1;
}
generate_branch_patch_unconditional(
external_block_exits[i].branch_source, translation_target);
}
translate_thumb_instruction();
block_data_position++;
/* If it went too far the cache needs to be flushed and the process
restarted. Because we might already be nested several stages in
a simple recursive call here won't work, it has to pedal out to
the beginning. */
if(translation_ptr > translation_cache_limit)
{
translation_flush_count++;
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
flush_translation_cache_ram();
break;
case TRANSLATION_REGION_ROM:
flush_translation_cache_rom();
break;
case TRANSLATION_REGION_BIOS:
flush_translation_cache_bios();
break;
}
return -1;
}
/* If the next instruction is a block entry point update the
cycle counter and update */
if(block_data[block_data_position].update_cycles == 1)
{
generate_cycle_update();
}
}
for(i = 0; i < translation_gate_targets; i++)
{
if(pc == translation_gate_target_pc[i])
{
generate_translation_gate(thumb);
break;
}
}
for(i = 0; i < block_exit_position; i++)
{
branch_target = block_exits[i].branch_target;
if((branch_target >= block_start_pc) && (branch_target < block_end_pc))
{
/* Internal branch, patch to recorded address */
translation_target =
block_data[(branch_target - block_start_pc) /
thumb_instruction_width].block_offset;
generate_branch_patch_unconditional(block_exits[i].branch_source,
translation_target);
}
else
{
/* External branch, save for later */
external_block_exits[external_block_exit_position].branch_target =
branch_target;
external_block_exits[external_block_exit_position].branch_source =
block_exits[i].branch_source;
external_block_exit_position++;
}
}
switch(translation_region)
{
case TRANSLATION_REGION_RAM:
if(pc >= 0x3000000)
{
if((pc > iwram_code_max) || (iwram_code_max == 0xFFFFFFFF))
iwram_code_max = pc;
}
else
if(pc >= 0x2000000)
{
if((pc > ewram_code_max) || (ewram_code_max == 0xFFFFFFFF))
ewram_code_max = pc;
}
ram_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_ROM:
rom_translation_ptr = translation_ptr;
break;
case TRANSLATION_REGION_BIOS:
bios_translation_ptr = translation_ptr;
break;
}
for(i = 0; i < external_block_exit_position; i++)
{
branch_target = external_block_exits[i].branch_target;
thumb_link_block();
if(!translation_target){
return -1;
}
generate_branch_patch_unconditional(
external_block_exits[i].branch_source, translation_target);
}
return 0;
}

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@ -311,9 +311,9 @@ u16 palette_ram_converted[512];
u16 io_registers[1024 * 16];
u8 ewram[1024 * 256 * 2];
u8 iwram[1024 * 32 * 2];
u8 vram[1024 * 96 * 2];
u8 vram[1024 * 96];
u8 bios_rom[1024 * 32];
u8 bios_rom[1024 * 16 * 2];
u32 bios_read_protect;
// Up to 128kb, store SRAM, flash ROM, or EEPROM here.
@ -3144,16 +3144,6 @@ cpu_alert_type dma_transfer(dma_transfer_type *dma)
memory_map_##type[map_offset + 3] = vram + (0x8000 * 2); \
} \
#define map_vram_firstpage(type) \
for(map_offset = 0x6000000 / 0x8000; map_offset < (0x7000000 / 0x8000); \
map_offset += 4) \
{ \
memory_map_##type[map_offset] = vram; \
memory_map_##type[map_offset + 1] = NULL; \
memory_map_##type[map_offset + 2] = NULL; \
memory_map_##type[map_offset + 3] = NULL; \
} \
// Picks a page to evict
u32 page_time = 0;
@ -3331,6 +3321,7 @@ void init_memory(void)
// This is because VRAM cannot be efficiently made incontiguous, and still allow
// the renderer to work as efficiently. It would, at the very least, require a
// lot of hacking of the renderer which I'm not prepared to do.
// TODO(davidgfnet): add SMC VRAM detection
// However, it IS possible to directly map the first page no matter what because
// there's 32kb of blank stuff sitting beneath it.

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@ -196,16 +196,16 @@ extern u32 gbc_sound_update;
extern u32 gbc_sound_wave_update;
extern dma_transfer_type dma[4];
extern u32 bios_read_protect;
extern u16 palette_ram[512];
extern u16 oam_ram[512];
extern u16 palette_ram_converted[512];
extern u16 io_registers[1024 * 16];
extern u8 vram[1024 * 96];
// Double buffer used for SMC detection
extern u8 bios_rom[1024 * 16 * 2];
extern u8 ewram[1024 * 256 * 2];
extern u8 iwram[1024 * 32 * 2];
extern u8 vram[1024 * 96 * 2];
extern u8 bios_rom[1024 * 32];
extern u32 bios_read_protect;
extern u8 *memory_map_read[8 * 1024];
extern u32 *reg;

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@ -2807,31 +2807,6 @@ ext_store_u32a_jtable:
.long ext_store_ignore # 0x0D EEPROM (nothing will write this)
.long ext_store_ignore # 0x0E Flash ROM/SRAM
ext_aligned_store32:
srl $1, $4, 24 # $1 = address >> 24
sltu $2, $1, 16 # check if the value is out of range
beq $2, $0, ext_store_ignore
sll $1, $1, 2 # make address word indexed (delay)
lui $2, %hi(ext_store_u32a_jtable)
addu $2, $2, $1
# $2 = ext_store_u32a_jtable[address >> 24]
lw $2, %lo(ext_store_u32a_jtable)($2)
jr $2 # jump to table location
nop
#execute_aligned_store32:
srl $2, $4, 28 # check if the address is out of range
bne $2, $0, ext_aligned_store32 # if it is, perform an extended load
srl $1, $4, 15 # $1 = page number of address
sll $1, $1, 2 # adjust to word index
addu $1, $1, $16 # $1 = memory_map_write[address >> 15]
lw $1, 256($1)
beq $1, $0, ext_aligned_store32 # if it's NULL perform an extended write
andi $2, $4, 0x7FFF # $2 = low 15bits of address (delay slot)
addu $1, $1, $2 # add the memory map offset
jr $ra # return
sw $5, ($1) # write the value
smc_write:
save_registers
jal flush_translation_cache_ram # flush translation cache