gpsp/x86/x86_stub.S

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# gameplaySP
#
# Copyright (C) 2006 Exophase <exophase@gmail.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#include "../gpsp_config.h"
.align 4
#define defsymbl(symbol) \
.global symbol ; \
.global _##symbol ; \
symbol: \
_##symbol:
// Windows 32 bit ABI prefixes functions with underscore
#if defined(_WIN32) && !defined(_WIN64)
#define fnm(name) _##name
#else
#define fnm(name) name
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#endif
// Convention calls are different, and register allocations, which makes it tricky
// All functions in this file are called manually from the JIT arena (unless stated
// otherwise), where we use our own convention call. However calls to C code must
// follow the calling convention. x86 is built with regparm=2 to avoid stack usage.
#if defined(__x86_64__) || defined(__amd64__)
#define ADDR_TYPE .quad
#define ADDR_SIZE_BYTES 8
#define STACK_REG %rsp
#define FULLREG(rn) %r##rn
#define SAVE_REGISTERS push %rbx; push %rsi; push %rdi; push %rbp
#define REST_REGISTERS pop %rbp; pop %rdi; pop %rsi; pop %rbx
#define REG_BASE %rbx
#ifdef _WIN64
#define CARG1_REG %ecx // Windows x64 ABI, of course different :D
#define CARG2_REG %edx
#define CARG2_REGPTR %rdx
#define CALL_FUNC(name) \
sub $32, %rsp; \
call fnm(name); \
add $32, %rsp
#else
#define CARG1_REG %edi // SystemV AMD64 ABI
#define CARG2_REG %esi
#define CARG2_REGPTR %rsi
#define CALL_FUNC(name) \
call fnm(name)
#endif
#define SETUP_ARGS mov %eax, CARG1_REG; mov %edx, CARG2_REG;
#else
#define ADDR_TYPE .long
#define ADDR_SIZE_BYTES 4
#define STACK_REG %esp
#define FULLREG(rn) %e##rn
#define SAVE_REGISTERS sub $8, %esp; push %ebx; push %esi; push %edi; push %ebp
#define REST_REGISTERS pop %ebp; pop %edi; pop %esi; pop %ebx; add $8, %esp;
#define REG_BASE %ebx
#define CARG1_REG %eax
#define CARG2_REG %edx
#define CARG2_REGPTR %edx
#define SETUP_ARGS
#define CALL_FUNC(name) \
call fnm(name)
#endif
.equ REG_SP, (13 * 4)
.equ REG_LR, (14 * 4)
.equ REG_PC, (15 * 4)
.equ REG_CPSR, (16 * 4)
.equ CPU_MODE, (17 * 4)
.equ CPU_HALT_STATE, (18 * 4)
.equ REG_N_FLAG, (20 * 4)
.equ REG_Z_FLAG, (21 * 4)
.equ REG_C_FLAG, (22 * 4)
.equ REG_V_FLAG, (23 * 4)
.equ CHANGED_PC_STATUS, (24 * 4)
.equ COMPLETED_FRAME, (25 * 4)
.equ OAM_UPDATED, (26 * 4)
.equ REG_SAVE, (27 * 4)
.equ REG_SAVE2, (28 * 4)
.equ REG_SAVE3, (29 * 4)
.equ REG_SAVE4, (30 * 4)
.equ REG_SAVE5, (31 * 4)
.equ load_u8_tbl, -(9 * 16 * ADDR_SIZE_BYTES)
.equ load_s8_tbl, -(8 * 16 * ADDR_SIZE_BYTES)
.equ load_u16_tbl, -(7 * 16 * ADDR_SIZE_BYTES)
.equ load_s16_tbl, -(6 * 16 * ADDR_SIZE_BYTES)
.equ load_u32_tbl, -(5 * 16 * ADDR_SIZE_BYTES)
.equ store_u8_tbl, -(4 * 16 * ADDR_SIZE_BYTES)
.equ store_u16_tbl, -(3 * 16 * ADDR_SIZE_BYTES)
.equ store_u32_tbl, -(2 * 16 * ADDR_SIZE_BYTES)
.equ store_aligned_u32_tbl, -(1 * 16 * ADDR_SIZE_BYTES)
.equ PALETTE_RAM_OFF, 0x0100
.equ PALETTE_RAM_CNV_OFF, 0x0500
.equ OAM_RAM_OFF, 0x0900
.equ IWRAM_OFF, 0x0D00
.equ VRAM_OFF, 0x10D00
.equ EWRAM_OFF, 0x28D00
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.equ IORAM_OFF, 0xA8D00
.equ SPSR_OFF, 0xA9100
.equ RDMAP_OFF, 0xA9200
#define REG_CYCLES %ebp
# destroys ecx and edx
.macro collapse_flag offset, shift
mov \offset(REG_BASE), %ecx
shl $\shift, %ecx
or %ecx, %edx
.endm
.macro collapse_flags_no_update
xor %edx, %edx
collapse_flag REG_N_FLAG, 31
collapse_flag REG_Z_FLAG, 30
collapse_flag REG_C_FLAG, 29
collapse_flag REG_V_FLAG, 28
mov REG_CPSR(REG_BASE), %ecx
and $0xFF, %ecx
or %ecx, %edx
.endm
.macro collapse_flags
collapse_flags_no_update
mov %edx, REG_CPSR(REG_BASE)
.endm
.macro extract_flag shift, offset
mov REG_CPSR(REG_BASE), %edx
shr $\shift, %edx
and $0x01, %edx
mov %edx, \offset(REG_BASE)
.endm
.macro extract_flags
extract_flag 31, REG_N_FLAG
extract_flag 30, REG_Z_FLAG
extract_flag 29, REG_C_FLAG
extract_flag 28, REG_V_FLAG
.endm
# Process a hardware event. Since an interrupt might be
# raised we have to check if the PC has changed.
# arg0 (always in eax): current PC address
defsymbl(x86_update_gba)
mov %eax, REG_PC(REG_BASE) # current PC = eax
collapse_flags # update cpsr, trashes ecx and edx
CALL_FUNC(update_gba) # process the next event
mov %eax, REG_CYCLES # new cycle count
# did we just complete a frame? go back to main then
cmpl $0, COMPLETED_FRAME(REG_BASE)
jne return_to_main
# did the PC change?
cmpl $1, CHANGED_PC_STATUS(REG_BASE)
je lookup_pc
ret # if not, go back to caller
# Perform this on an indirect branch that will definitely go to
# ARM code, IE anything that changes the PC in ARM mode except
# for BX and data processing to PC with the S bit set.
# arg0 (always in eax): GBA address to branch to
defsymbl(x86_indirect_branch_arm)
mov %eax, CARG1_REG
CALL_FUNC(block_lookup_address_arm)
add $ADDR_SIZE_BYTES, STACK_REG # remove current return addr
jmp *FULLREG(ax)
# For indirect branches that'll definitely go to Thumb. In
# Thumb mode any indirect branches except for BX.
# arg0 (always in eax): GBA address to branch to
defsymbl(x86_indirect_branch_thumb)
mov %eax, CARG1_REG
CALL_FUNC(block_lookup_address_thumb)
add $ADDR_SIZE_BYTES, STACK_REG # remove current return addr
jmp *FULLREG(ax)
# For indirect branches that can go to either Thumb or ARM,
# mainly BX (also data processing to PC with S bit set, be
# sure to adjust the target with a 1 in the lowest bit for this)
# arg0 (always in eax): GBA address to branch to
defsymbl(x86_indirect_branch_dual)
mov %eax, CARG1_REG
CALL_FUNC(block_lookup_address_dual)
add $ADDR_SIZE_BYTES, STACK_REG # remove current return addr
jmp *FULLREG(ax)
# General ext memory routines
ext_store_rtc8: # No RTC writes on byte or word access
ext_store_rtc32:
ext_store_backup16: # Backup (flash) accessed via byte writes
ext_store_backup32:
ext_store_ignore:
ret # ignore these writes
ext_store_rtc16:
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and $0xFFFF, %edx # make value 16bit
and $0xFF, %eax # mask address
SETUP_ARGS # Setup addr, value
CALL_FUNC(write_rtc) # write out RTC register
ret
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ext_store_backup8:
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and $0xFF, %edx # make value 8bit
and $0xFFFF, %eax # mask address
SETUP_ARGS # Setup addr, value
CALL_FUNC(write_backup) # perform backup write
ret
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write_epilogue:
cmp $0, %eax # 0 return means nothing happened
jz no_alert # if so we can leave
collapse_flags # make sure flags are good for function call
cmp $2, %eax # see if it was an SMC trigger
je smc_write
alert_loop:
CALL_FUNC(update_gba) # process the next event
# did we just complete a frame? go back to main then
cmpl $0, COMPLETED_FRAME(REG_BASE)
jne return_to_main
# see if the halt status has changed
mov CPU_HALT_STATE(REG_BASE), %edx
cmp $0, %edx # 0 means it has
jnz alert_loop # if not go again
mov %eax, REG_CYCLES # load new cycle count
jmp lookup_pc # pc has definitely changed
no_alert:
ret
ext_store_eeprom:
CALL_FUNC(write_eeprom) # perform eeprom write
ret
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# Register wrapping for various sizes
#define reg32(n) %e##n##x
#define reg16(n) %##n##x
#define reg8(n) %##n##l
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# 16 bit bus results in duplicated 8bit accesses
#define dup8() mov %dl, %dh
#define noop()
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# Writes to EWRAM and IWRAM must check for SMC
#define smc_check_store_aligned(opsuf, addrexp)
#define smc_check_store(opsuf, addrexp) ;\
cmp##opsuf $0, addrexp /* Check SMC mirror */ ;\
jne smc_write
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# Memory write routines
#define write_stubs(fname, wsize, opsuf, regfn, regfn16, addrm, dup8fn) ;\
;\
/* eax: address to write to */ ;\
/* edx: value to write */ ;\
;\
defsymbl(execute_##fname##_u##wsize) ;\
mov %eax, %ecx /* ecx = address */ ;\
shr $24, %ecx /* ecx = address >> 24 */ ;\
cmp $15, %ecx ;\
ja ext_store_ignore ;\
/* ecx = ext_store_u*_jtable[address >> 24] */ ;\
jmp *fname##_u##wsize##_tbl(REG_BASE, FULLREG(cx), ADDR_SIZE_BYTES) ;\
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;\
ext_##fname##_iwram##wsize: ;\
and $(0x7FFF & addrm), %eax /* Addr wrap */ ;\
mov regfn(d), (IWRAM_OFF+0x8000)(REG_BASE, FULLREG(ax)) /* Actual write */ ;\
smc_check_##fname(opsuf, IWRAM_OFF(REG_BASE, FULLREG(ax))) ;\
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ret ;\
;\
ext_##fname##_ewram##wsize: ;\
and $(0x3FFFF & addrm), %eax /* Addr wrap */ ;\
mov regfn(d), EWRAM_OFF(REG_BASE, FULLREG(ax)) /* Actual write */ ;\
smc_check_##fname(opsuf, (EWRAM_OFF+0x40000)(REG_BASE, FULLREG(ax))) ;\
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ret ;\
;\
ext_##fname##_vram##wsize: ;\
and $(0x1FFFE & addrm), %eax /* Addr wrap */ ;\
dup8fn() /* Double byte for 8b access */ ;\
cmp $0x18000, %eax /* Weird 96KB mirror */ ;\
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jb 1f ;\
sub $0x8000, %eax /* Mirror last bank */ ;\
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1: ;\
mov regfn16(d), VRAM_OFF(REG_BASE, FULLREG(ax)) /* Actual write */ ;\
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ret ;\
;\
ext_##fname##_oam##wsize: ;\
and $(0x3FE & addrm), %eax /* Addr wrap */ ;\
movl $1, OAM_UPDATED(REG_BASE) /* flag OAM update */ ;\
dup8fn() /* Double byte for 8b access */ ;\
mov regfn16(d), OAM_RAM_OFF(REG_BASE, FULLREG(ax)) /* Actual write */ ;\
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ret ;\
;\
ext_##fname##_io##wsize: ;\
and $(0x3FF & addrm), %eax /* Addr wrap */ ;\
SETUP_ARGS ;\
CALL_FUNC(write_io_register##wsize) /* Call C code */ ;\
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jmp write_epilogue /* Might need an update */ ;\
write_stubs(store, 32, l, reg32, reg32, ~3, noop)
write_stubs(store, 16, w, reg16, reg16, ~1, noop)
write_stubs(store, 8, b, reg8, reg16, ~0, dup8)
write_stubs(store_aligned, 32, l, reg32, reg32, ~3, noop)
# Palette routines are a bit special, due to 16bit bus + decoded palette
ext_store_palette8:
and $0x3FE, %eax # wrap around address and align to 16bits
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mov %dl, %dh # duplicate the byte to be written
jmp ext_store_palette16b # perform 16bit palette write
ext_store_palette16:
and $0x3FF, %eax # wrap around address
ext_store_palette16b: # entry point for 8bit write
mov %dx, PALETTE_RAM_OFF(REG_BASE, FULLREG(ax)) # write out palette value
mov %edx, %ecx # cx = dx
shl $11, %ecx # cx <<= 11 (red component is in high bits)
mov %dh, %cl # bottom bits of cx = top bits of dx
shr $2, %cl # move the blue component to the bottom of cl
and $0x03E0, %dx # isolate green component of dx
shl $1, %dx # make green component 6bits
or %edx, %ecx # combine green component into ecx
# write out the freshly converted palette value
mov %cx, PALETTE_RAM_CNV_OFF(REG_BASE, FULLREG(ax))
ret # done
ext_store_palette32:
and $0x3FF, %eax # wrap around address
call ext_store_palette16b # write first 16bits
add $2, %eax # go to next address
shr $16, %edx # go to next 16bits
jmp ext_store_palette16b # write next 16bits
# Memory load routines
#define load_stubs(rtype, movop, addrm, albits, slowfn) ;\
;\
/* eax: address to read */ ;\
/* edx: current PC address */ ;\
;\
defsymbl(execute_load_##rtype) ;\
mov %eax, %ecx /* ecx = address */ ;\
rol $8, %ecx /* ecx = ror(address, 24) */ ;\
and $((1<<(8+albits))-1), %ecx /* preserve align+msb */ ;\
cmp $15, %ecx ;\
ja ext_load_slow##rtype ;\
jmp *load_##rtype##_tbl(REG_BASE, FULLREG(cx), ADDR_SIZE_BYTES) ;\
;\
ext_load_bios##rtype: ;\
mov %edx, REG_PC(REG_BASE) /* Store current PC */ ;\
jmp ext_load_slow##rtype ;\
;\
ext_load_iwram##rtype: ;\
and $(0x7FFF & addrm), %eax /* Addr wrap */ ;\
movop (IWRAM_OFF+0x8000)(REG_BASE, FULLREG(ax)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_ewram##rtype: ;\
and $(0x3FFFF & addrm), %eax /* Addr wrap */ ;\
movop EWRAM_OFF(REG_BASE, FULLREG(ax)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_vram##rtype: ;\
and $(0x1FFFF & addrm), %eax /* Addr wrap */ ;\
cmp $0x18000, %eax /* Weird 96KB mirror */ ;\
jb 1f ;\
sub $0x8000, %eax /* Mirror last bank */ ;\
1: ;\
movop VRAM_OFF(REG_BASE, FULLREG(ax)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_oam##rtype: ;\
and $(0x3FF & addrm), %eax /* Addr wrap */ ;\
movop OAM_RAM_OFF(REG_BASE, FULLREG(ax)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_palette##rtype: ;\
and $(0x3FF & addrm), %eax /* Addr wrap */ ;\
movop PALETTE_RAM_OFF(REG_BASE, FULLREG(ax)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_io##rtype: ;\
and $(0x3FF & addrm), %eax /* Addr wrap */ ;\
movop IORAM_OFF(REG_BASE, FULLREG(ax)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_rom##rtype: ;\
mov %eax, %ecx /* ecx = address */ ;\
shr $15, %ecx /* ecx = address >> 15 */ ;\
/* Read rdmap pointer */ ;\
mov RDMAP_OFF(REG_BASE, FULLREG(cx), ADDR_SIZE_BYTES), FULLREG(dx) ;\
mov %eax, %ecx /* ecx = address */ ;\
and $0x7FFF, %ecx /* ecx = address LSB */ ;\
movop (FULLREG(dx), FULLREG(cx)), %eax /* Read mem */ ;\
ret ;\
;\
ext_load_slow##rtype: ;\
SETUP_ARGS ;\
CALL_FUNC(slowfn) ;\
ret ;\
load_stubs(u32, mov, ~3, 2, read_memory32)
load_stubs(u16, movzwl, ~1, 1, read_memory16)
load_stubs(s16, movswl, ~1, 1, read_memory16s)
load_stubs( u8, movzbl, ~0, 0, read_memory8)
load_stubs( s8, movsbl, ~0, 0, read_memory8s)
# arg0 (%eax) = new_cpsr
# arg1 (%edx) = store_mask
defsymbl(execute_store_cpsr)
mov %edx, REG_SAVE(REG_BASE) # save store_mask
mov %eax, %ecx # ecx = new_cpsr
and %edx, %ecx # ecx = new_cpsr & store_mask
mov REG_CPSR(REG_BASE), %eax # eax = cpsr
not %edx # edx = ~store_mask
and %edx, %eax # eax = cpsr & ~store_mask
or %ecx, %eax # eax = new cpsr combined with old
mov %eax, REG_CPSR(REG_BASE) # save new cpsr to register
CALL_FUNC(execute_store_cpsr_body) # do the dirty work in this C function
extract_flags # pull out flag vars from new CPSR
cmp $0, %eax # see if return value is 0
jnz 1f # might have changed the PC
ret # return
1: # PC has changed, due to IRQ triggered
mov %eax, CARG1_REG # Returned addr from C function
CALL_FUNC(block_lookup_address_arm) # lookup new PC
add $ADDR_SIZE_BYTES, STACK_REG # get rid of current return address
jmp *FULLREG(ax)
# On writes that overwrite code, cache is flushed and execution re-started
smc_write:
CALL_FUNC(flush_translation_cache_ram)
lookup_pc:
movl $0, CHANGED_PC_STATUS(REG_BASE) # Lookup new block and jump to it
mov REG_PC(REG_BASE), CARG1_REG # Load PC as argument0
testl $0x20, REG_CPSR(REG_BASE)
jz 1f
### Thumb mode
CALL_FUNC(block_lookup_address_thumb)
add $ADDR_SIZE_BYTES, STACK_REG # Can't return, discard addr
jmp *FULLREG(ax)
1:# ARM mode
CALL_FUNC(block_lookup_address_arm)
add $ADDR_SIZE_BYTES, STACK_REG # Can't return, discard addr
jmp *FULLREG(ax)
# Called from C, args are platform dependant :/
# arg0 (eax/edi/ecx): cycle counter
# arg1 (edx/rsi/rdx): reg base pointer
defsymbl(execute_arm_translate_internal)
# Save main context, since we need to return gracefully
SAVE_REGISTERS # Pushes 16 or 32 bytes
# The stack here is aligned to 16 bytes minus 4 or 8 bytes.
mov CARG1_REG, REG_CYCLES # load cycle counter (arg0)
mov CARG2_REGPTR, REG_BASE # load base register (arg1)
extract_flags # load flag variables
# (if the CPU is halted, do not start executing but
# loop in the alert loop until it wakes up)
cmpl $0, CPU_HALT_STATE(REG_BASE)
je 1f
call alert_loop # Need to push something to the stack
1:
call lookup_pc # Go fetch and execute PC
return_to_main:
add $ADDR_SIZE_BYTES, STACK_REG # remove current return addr
REST_REGISTERS # Restore saved registers
ret
#define load_table(atype) ;\
ADDR_TYPE ext_load_bios##atype /* 0x00 BIOS */;\
ADDR_TYPE ext_load_slow##atype /* 0x01 open read */;\
ADDR_TYPE ext_load_ewram##atype /* 0x02 EWRAM */;\
ADDR_TYPE ext_load_iwram##atype /* 0x03 IWRAM */;\
ADDR_TYPE ext_load_io##atype /* 0x04 I/O registers */;\
ADDR_TYPE ext_load_palette##atype /* 0x05 Palette RAM */;\
ADDR_TYPE ext_load_vram##atype /* 0x06 VRAM */;\
ADDR_TYPE ext_load_oam##atype /* 0x07 OAM RAM */;\
ADDR_TYPE ext_load_rom##atype /* 0x08 gamepak (or RTC) */;\
ADDR_TYPE ext_load_rom##atype /* 0x09 gamepak */;\
ADDR_TYPE ext_load_rom##atype /* 0x0A gamepak */;\
ADDR_TYPE ext_load_rom##atype /* 0x0B gamepak */;\
ADDR_TYPE ext_load_rom##atype /* 0x0C gamepak */;\
ADDR_TYPE ext_load_slow##atype /* 0x0D EEPROM (possibly) */;\
ADDR_TYPE ext_load_slow##atype /* 0x0E Flash ROM/SRAM */;\
ADDR_TYPE ext_load_slow##atype /* 0x0F open read */;\
#define store_table(asize) ;\
ADDR_TYPE ext_store_ignore /* 0x00 BIOS, ignore */;\
ADDR_TYPE ext_store_ignore /* 0x01 invalid, ignore */;\
ADDR_TYPE ext_store_ewram##asize /* 0x02 EWRAM */;\
ADDR_TYPE ext_store_iwram##asize /* 0x03 IWRAM */;\
ADDR_TYPE ext_store_io##asize /* 0x04 I/O registers */;\
ADDR_TYPE ext_store_palette##asize /* 0x05 Palette RAM */;\
ADDR_TYPE ext_store_vram##asize /* 0x06 VRAM */;\
ADDR_TYPE ext_store_oam##asize /* 0x07 OAM RAM */;\
ADDR_TYPE ext_store_rtc##asize /* 0x08 gamepak (RTC or ignore) */;\
ADDR_TYPE ext_store_ignore /* 0x09 gamepak, ignore */;\
ADDR_TYPE ext_store_ignore /* 0x0A gamepak, ignore */;\
ADDR_TYPE ext_store_ignore /* 0x0B gamepak, ignore */;\
ADDR_TYPE ext_store_ignore /* 0x0C gamepak, ignore */;\
ADDR_TYPE ext_store_eeprom /* 0x0D EEPROM (possibly) */;\
ADDR_TYPE ext_store_backup##asize /* 0x0E Flash ROM/SRAM */;\
ADDR_TYPE ext_store_ignore /* 0x0F ignore */;\
.data
.align 16
defsymbl(x86_table_data)
load_table(u8)
load_table(s8)
load_table(u16)
load_table(s16)
load_table(u32)
store_table(8)
store_table(16)
store_table(32)
# aligned word writes (non SMC signaling)
ADDR_TYPE ext_store_ignore # 0x00 BIOS, ignore
ADDR_TYPE ext_store_ignore # 0x01 invalid, ignore
ADDR_TYPE ext_store_aligned_ewram32 # 0x02 EWRAM
ADDR_TYPE ext_store_aligned_iwram32 # 0x03 IWRAM
ADDR_TYPE ext_store_io32 # 0x04 I/O registers
ADDR_TYPE ext_store_palette32 # 0x05 Palette RAM
ADDR_TYPE ext_store_vram32 # 0x06 VRAM
ADDR_TYPE ext_store_oam32 # 0x07 OAM RAM
ADDR_TYPE ext_store_ignore # 0x08 gamepak, ignore (no RTC in 32bit)
ADDR_TYPE ext_store_ignore # 0x09 gamepak, ignore
ADDR_TYPE ext_store_ignore # 0x0A gamepak, ignore
ADDR_TYPE ext_store_ignore # 0x0B gamepak, ignore
ADDR_TYPE ext_store_ignore # 0x0C gamepak, ignore
ADDR_TYPE ext_store_eeprom # 0x0D EEPROM (possibly)
ADDR_TYPE ext_store_ignore # 0x0E Flash ROM/SRAM must be 8bit
ADDR_TYPE ext_store_ignore # 0x0F ignore
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.bss
.align 64
defsymbl(x86_table_info)
.space 9*16*ADDR_SIZE_BYTES
defsymbl(reg)
.space 0x100
defsymbl(palette_ram)
.space 0x400
defsymbl(palette_ram_converted)
.space 0x400
defsymbl(oam_ram)
.space 0x400
defsymbl(iwram)
.space 0x10000
defsymbl(vram)
.space 0x18000
defsymbl(ewram)
.space 0x80000
defsymbl(io_registers)
.space 0x400
defsymbl(spsr)
.space 24
.space 8 # padding
defsymbl(reg_mode)
.space 196
.space 28 # padding
defsymbl(memory_map_read)
.space 8*1024*ADDR_SIZE_BYTES
#ifndef MMAP_JIT_CACHE
#error "x86 dynarec builds *require* MMAP_JIT_CACHE"
#endif