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gpsp/cpu.c

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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
*/
// Important todo:
// - stm reglist writeback when base is in the list needs adjustment
// - block memory needs psr swapping and user mode reg swapping
#include <stdio.h>
#include "common.h"
u32 memory_region_access_read_u8[16];
u32 memory_region_access_read_s8[16];
u32 memory_region_access_read_u16[16];
u32 memory_region_access_read_s16[16];
u32 memory_region_access_read_u32[16];
u32 memory_region_access_write_u8[16];
u32 memory_region_access_write_u16[16];
u32 memory_region_access_write_u32[16];
u32 memory_reads_u8;
u32 memory_reads_s8;
u32 memory_reads_u16;
u32 memory_reads_s16;
u32 memory_reads_u32;
u32 memory_writes_u8;
u32 memory_writes_u16;
u32 memory_writes_u32;
const u8 bit_count[256] =
{
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3,
4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4,
4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 1, 2, 2, 3, 2,
3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5,
4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4,
5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3,
3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2,
3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6,
4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5,
6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 3, 4, 4, 5, 4, 5,
5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6,
7, 7, 8
};
#ifdef REGISTER_USAGE_ANALYZE
u64 instructions_total = 0;
u64 arm_reg_freq[16];
u64 arm_reg_access_total = 0;
u64 arm_instructions_total = 0;
u64 thumb_reg_freq[16];
u64 thumb_reg_access_total = 0;
u64 thumb_instructions_total = 0;
// mla/long mla's addition operand are not counted yet.
#define using_register(instruction_set, register, type) \
instruction_set##_reg_freq[register]++; \
instruction_set##_reg_access_total++ \
#define using_register_list(instruction_set, rlist, count) \
{ \
u32 i; \
for(i = 0; i < count; i++) \
{ \
if((reg_list >> i) & 0x01) \
{ \
using_register(instruction_set, i, memory_target); \
} \
} \
} \
#define using_instruction(instruction_set) \
instruction_set##_instructions_total++; \
instructions_total++ \
int sort_tagged_element(const void *_a, const void *_b)
{
const u64 *a = _a;
const u64 *b = _b;
return (int)(b[1] - a[1]);
}
void print_register_usage()
{
u32 i;
u64 arm_reg_freq_tagged[32];
u64 thumb_reg_freq_tagged[32];
double percent;
double percent_total = 0.0;
for(i = 0; i < 16; i++)
{
arm_reg_freq_tagged[i * 2] = i;
arm_reg_freq_tagged[(i * 2) + 1] = arm_reg_freq[i];
thumb_reg_freq_tagged[i * 2] = i;
thumb_reg_freq_tagged[(i * 2) + 1] = thumb_reg_freq[i];
}
qsort(arm_reg_freq_tagged, 16, sizeof(u64) * 2, sort_tagged_element);
qsort(thumb_reg_freq_tagged, 16, sizeof(u64) * 2, sort_tagged_element);
printf("ARM register usage (%lf%% ARM instructions):\n",
(arm_instructions_total * 100.0) / instructions_total);
for(i = 0; i < 16; i++)
{
percent = (arm_reg_freq_tagged[(i * 2) + 1] * 100.0) /
arm_reg_access_total;
percent_total += percent;
printf("r%02d: %lf%% (-- %lf%%)\n",
(u32)arm_reg_freq_tagged[(i * 2)], percent, percent_total);
}
percent_total = 0.0;
printf("\nThumb register usage (%lf%% Thumb instructions):\n",
(thumb_instructions_total * 100.0) / instructions_total);
for(i = 0; i < 16; i++)
{
percent = (thumb_reg_freq_tagged[(i * 2) + 1] * 100.0) /
thumb_reg_access_total;
percent_total += percent;
printf("r%02d: %lf%% (-- %lf%%)\n",
(u32)thumb_reg_freq_tagged[(i * 2)], percent, percent_total);
}
memset(arm_reg_freq, 0, sizeof(u64) * 16);
memset(thumb_reg_freq, 0, sizeof(u64) * 16);
arm_reg_access_total = 0;
thumb_reg_access_total = 0;
}
#else
#define using_register(instruction_set, register, type) \
#define using_register_list(instruction_set, rlist, count) \
#define using_instruction(instruction_set) \
#endif
#define arm_decode_data_proc_reg() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rd, op_dest); \
using_register(arm, rn, op_src); \
using_register(arm, rm, op_src) \
#define arm_decode_data_proc_imm() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 imm; \
ror(imm, opcode & 0xFF, ((opcode >> 8) & 0x0F) * 2); \
using_register(arm, rd, op_dest); \
using_register(arm, rn, op_src) \
#define arm_decode_psr_reg() \
u32 psr_field = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rd, op_dest); \
using_register(arm, rm, op_src) \
#define arm_decode_psr_imm() \
u32 psr_field = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 imm; \
ror(imm, opcode & 0xFF, ((opcode >> 8) & 0x0F) * 2); \
using_register(arm, rd, op_dest) \
#define arm_decode_branchx() \
u32 rn = opcode & 0x0F; \
using_register(arm, rn, branch_target) \
#define arm_decode_multiply() \
u32 rd = (opcode >> 16) & 0x0F; \
u32 rn = (opcode >> 12) & 0x0F; \
u32 rs = (opcode >> 8) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rd, op_dest); \
using_register(arm, rn, op_src); \
using_register(arm, rm, op_src) \
#define arm_decode_multiply_long() \
u32 rdhi = (opcode >> 16) & 0x0F; \
u32 rdlo = (opcode >> 12) & 0x0F; \
u32 rn = (opcode >> 8) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rdhi, op_dest); \
using_register(arm, rdlo, op_dest); \
using_register(arm, rn, op_src); \
using_register(arm, rm, op_src) \
#define arm_decode_swap() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rd, memory_target); \
using_register(arm, rn, memory_base); \
using_register(arm, rm, memory_target) \
#define arm_decode_half_trans_r() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rd, memory_target); \
using_register(arm, rn, memory_base); \
using_register(arm, rm, memory_offset) \
#define arm_decode_half_trans_of() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 offset = ((opcode >> 4) & 0xF0) | (opcode & 0x0F); \
using_register(arm, rd, memory_target); \
using_register(arm, rn, memory_base) \
#define arm_decode_data_trans_imm() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 offset = opcode & 0x0FFF; \
using_register(arm, rd, memory_target); \
using_register(arm, rn, memory_base) \
#define arm_decode_data_trans_reg() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 rd = (opcode >> 12) & 0x0F; \
u32 rm = opcode & 0x0F; \
using_register(arm, rd, memory_target); \
using_register(arm, rn, memory_base); \
using_register(arm, rm, memory_offset) \
#define arm_decode_block_trans() \
u32 rn = (opcode >> 16) & 0x0F; \
u32 reg_list = opcode & 0xFFFF; \
using_register(arm, rn, memory_base); \
using_register_list(arm, reg_list, 16) \
#define arm_decode_branch() \
s32 offset = ((s32)(opcode & 0xFFFFFF) << 8) >> 6 \
#define thumb_decode_shift() \
u32 imm = (opcode >> 6) & 0x1F; \
u32 rs = (opcode >> 3) & 0x07; \
u32 rd = opcode & 0x07; \
using_register(thumb, rd, op_dest); \
using_register(thumb, rs, op_shift) \
#define thumb_decode_add_sub() \
u32 rn = (opcode >> 6) & 0x07; \
u32 rs = (opcode >> 3) & 0x07; \
u32 rd = opcode & 0x07; \
using_register(thumb, rd, op_dest); \
using_register(thumb, rn, op_src); \
using_register(thumb, rn, op_src) \
#define thumb_decode_add_sub_imm() \
u32 imm = (opcode >> 6) & 0x07; \
u32 rs = (opcode >> 3) & 0x07; \
u32 rd = opcode & 0x07; \
using_register(thumb, rd, op_src_dest); \
using_register(thumb, rs, op_src) \
#define thumb_decode_imm() \
u32 imm = opcode & 0xFF; \
using_register(thumb, ((opcode >> 8) & 0x07), op_dest) \
#define thumb_decode_alu_op() \
u32 rs = (opcode >> 3) & 0x07; \
u32 rd = opcode & 0x07; \
using_register(thumb, rd, op_src_dest); \
using_register(thumb, rs, op_src) \
#define thumb_decode_hireg_op() \
u32 rs = (opcode >> 3) & 0x0F; \
u32 rd = ((opcode >> 4) & 0x08) | (opcode & 0x07); \
using_register(thumb, rd, op_src_dest); \
using_register(thumb, rs, op_src) \
#define thumb_decode_mem_reg() \
u32 ro = (opcode >> 6) & 0x07; \
u32 rb = (opcode >> 3) & 0x07; \
u32 rd = opcode & 0x07; \
using_register(thumb, rd, memory_target); \
using_register(thumb, rb, memory_base); \
using_register(thumb, ro, memory_offset) \
#define thumb_decode_mem_imm() \
u32 imm = (opcode >> 6) & 0x1F; \
u32 rb = (opcode >> 3) & 0x07; \
u32 rd = opcode & 0x07; \
using_register(thumb, rd, memory_target); \
using_register(thumb, rb, memory_base) \
#define thumb_decode_add_sp() \
u32 imm = opcode & 0x7F; \
using_register(thumb, REG_SP, op_dest) \
#define thumb_decode_rlist() \
u32 reg_list = opcode & 0xFF; \
using_register_list(thumb, rlist, 8) \
#define thumb_decode_branch_cond() \
s32 offset = (s8)(opcode & 0xFF) \
#define thumb_decode_swi() \
u32 comment = opcode & 0xFF \
#define thumb_decode_branch() \
u32 offset = opcode & 0x07FF \
#define get_shift_register(dest) \
u32 shift = reg[(opcode >> 8) & 0x0F]; \
using_register(arm, ((opcode >> 8) & 0x0F), op_shift); \
dest = reg[rm]; \
if(rm == 15) \
dest += 4 \
#define calculate_z_flag(dest) \
z_flag = (dest == 0) \
#define calculate_n_flag(dest) \
n_flag = ((signed)dest < 0) \
#define calculate_c_flag_sub(dest, src_a, src_b) \
c_flag = ((unsigned)src_b <= (unsigned)src_a) \
#define calculate_v_flag_sub(dest, src_a, src_b) \
v_flag = ((signed)src_b > (signed)src_a) != ((signed)dest < 0) \
#define calculate_c_flag_add(dest, src_a, src_b) \
c_flag = ((unsigned)dest < (unsigned)src_a) \
#define calculate_v_flag_add(dest, src_a, src_b) \
v_flag = ((signed)dest < (signed)src_a) != ((signed)src_b < 0) \
#define calculate_reg_sh() \
u32 reg_sh; \
switch((opcode >> 4) & 0x07) \
{ \
/* LSL imm */ \
case 0x0: \
{ \
reg_sh = reg[rm] << ((opcode >> 7) & 0x1F); \
break; \
} \
\
/* LSL reg */ \
case 0x1: \
{ \
get_shift_register(reg_sh); \
if(shift <= 31) \
reg_sh = reg_sh << shift; \
else \
reg_sh = 0; \
break; \
} \
\
/* LSR imm */ \
case 0x2: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
if(imm == 0) \
reg_sh = 0; \
else \
reg_sh = reg[rm] >> imm; \
break; \
} \
\
/* LSR reg */ \
case 0x3: \
{ \
get_shift_register(reg_sh); \
if(shift <= 31) \
reg_sh = reg_sh >> shift; \
else \
reg_sh = 0; \
break; \
} \
\
/* ASR imm */ \
case 0x4: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
reg_sh = reg[rm]; \
\
if(imm == 0) \
reg_sh = (s32)reg_sh >> 31; \
else \
reg_sh = (s32)reg_sh >> imm; \
break; \
} \
\
/* ASR reg */ \
case 0x5: \
{ \
get_shift_register(reg_sh); \
if(shift <= 31) \
reg_sh = (s32)reg_sh >> shift; \
else \
reg_sh = (s32)reg_sh >> 31; \
break; \
} \
\
/* ROR imm */ \
case 0x6: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
\
if(imm == 0) \
reg_sh = (reg[rm] >> 1) | (c_flag << 31); \
else \
ror(reg_sh, reg[rm], imm); \
break; \
} \
\
/* ROR reg */ \
case 0x7: \
{ \
get_shift_register(reg_sh); \
ror(reg_sh, reg_sh, shift); \
break; \
} \
} \
#define calculate_reg_sh_flags() \
u32 reg_sh; \
switch((opcode >> 4) & 0x07) \
{ \
/* LSL imm */ \
case 0x0: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
reg_sh = reg[rm]; \
\
if(imm != 0) \
{ \
c_flag = (reg_sh >> (32 - imm)) & 0x01; \
reg_sh <<= imm; \
} \
\
break; \
} \
\
/* LSL reg */ \
case 0x1: \
{ \
get_shift_register(reg_sh); \
if(shift != 0) \
{ \
if(shift > 31) \
{ \
if(shift == 32) \
c_flag = reg_sh & 0x01; \
else \
c_flag = 0; \
reg_sh = 0; \
} \
else \
{ \
c_flag = (reg_sh >> (32 - shift)) & 0x01; \
reg_sh <<= shift; \
} \
} \
break; \
} \
\
/* LSR imm */ \
case 0x2: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
reg_sh = reg[rm]; \
if(imm == 0) \
{ \
c_flag = reg_sh >> 31; \
reg_sh = 0; \
} \
else \
{ \
c_flag = (reg_sh >> (imm - 1)) & 0x01; \
reg_sh >>= imm; \
} \
break; \
} \
\
/* LSR reg */ \
case 0x3: \
{ \
get_shift_register(reg_sh); \
if(shift != 0) \
{ \
if(shift > 31) \
{ \
if(shift == 32) \
c_flag = (reg_sh >> 31) & 0x01; \
else \
c_flag = 0; \
reg_sh = 0; \
} \
else \
{ \
c_flag = (reg_sh >> (shift - 1)) & 0x01; \
reg_sh >>= shift; \
} \
} \
break; \
} \
\
/* ASR imm */ \
case 0x4: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
reg_sh = reg[rm]; \
if(imm == 0) \
{ \
reg_sh = (s32)reg_sh >> 31; \
c_flag = reg_sh & 0x01; \
} \
else \
{ \
c_flag = (reg_sh >> (imm - 1)) & 0x01; \
reg_sh = (s32)reg_sh >> imm; \
} \
break; \
} \
\
/* ASR reg */ \
case 0x5: \
{ \
get_shift_register(reg_sh); \
if(shift != 0) \
{ \
if(shift > 31) \
{ \
reg_sh = (s32)reg_sh >> 31; \
c_flag = reg_sh & 0x01; \
} \
else \
{ \
c_flag = (reg_sh >> (shift - 1)) & 0x01; \
reg_sh = (s32)reg_sh >> shift; \
} \
} \
break; \
} \
\
/* ROR imm */ \
case 0x6: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
reg_sh = reg[rm]; \
if(imm == 0) \
{ \
u32 old_c_flag = c_flag; \
c_flag = reg_sh & 0x01; \
reg_sh = (reg_sh >> 1) | (old_c_flag << 31); \
} \
else \
{ \
c_flag = (reg_sh >> (imm - 1)) & 0x01; \
ror(reg_sh, reg_sh, imm); \
} \
break; \
} \
\
/* ROR reg */ \
case 0x7: \
{ \
get_shift_register(reg_sh); \
if(shift != 0) \
{ \
c_flag = (reg_sh >> (shift - 1)) & 0x01; \
ror(reg_sh, reg_sh, shift); \
} \
break; \
} \
} \
#define calculate_reg_offset() \
u32 reg_offset; \
switch((opcode >> 5) & 0x03) \
{ \
/* LSL imm */ \
case 0x0: \
{ \
reg_offset = reg[rm] << ((opcode >> 7) & 0x1F); \
break; \
} \
\
/* LSR imm */ \
case 0x1: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
if(imm == 0) \
reg_offset = 0; \
else \
reg_offset = reg[rm] >> imm; \
break; \
} \
\
/* ASR imm */ \
case 0x2: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
if(imm == 0) \
reg_offset = (s32)reg[rm] >> 31; \
else \
reg_offset = (s32)reg[rm] >> imm; \
break; \
} \
\
/* ROR imm */ \
case 0x3: \
{ \
u32 imm = (opcode >> 7) & 0x1F; \
if(imm == 0) \
reg_offset = (reg[rm] >> 1) | (c_flag << 31); \
else \
ror(reg_offset, reg[rm], imm); \
break; \
} \
} \
#define calculate_flags_add(dest, src_a, src_b) \
calculate_z_flag(dest); \
calculate_n_flag(dest); \
calculate_c_flag_add(dest, src_a, src_b); \
calculate_v_flag_add(dest, src_a, src_b) \
#define calculate_flags_sub(dest, src_a, src_b) \
calculate_z_flag(dest); \
calculate_n_flag(dest); \
calculate_c_flag_sub(dest, src_a, src_b); \
calculate_v_flag_sub(dest, src_a, src_b) \
#define calculate_flags_logic(dest) \
calculate_z_flag(dest); \
calculate_n_flag(dest) \
#define extract_flags() \
n_flag = reg[REG_CPSR] >> 31; \
z_flag = (reg[REG_CPSR] >> 30) & 0x01; \
c_flag = (reg[REG_CPSR] >> 29) & 0x01; \
v_flag = (reg[REG_CPSR] >> 28) & 0x01; \
#define collapse_flags() \
reg[REG_CPSR] = (n_flag << 31) | (z_flag << 30) | (c_flag << 29) | \
(v_flag << 28) | (reg[REG_CPSR] & 0xFF) \
#define memory_region(r_dest, l_dest, address) \
r_dest = memory_regions[address >> 24]; \
l_dest = memory_limits[address >> 24] \
#define pc_region() \
memory_region(pc_region, pc_limit, pc) \
#define check_pc_region() \
new_pc_region = (pc >> 15); \
if(new_pc_region != pc_region) \
{ \
pc_region = new_pc_region; \
pc_address_block = memory_map_read[new_pc_region]; \
\
if(pc_address_block == NULL) \
pc_address_block = load_gamepak_page(pc_region & 0x3FF); \
} \
u32 branch_targets = 0;
u32 high_frequency_branch_targets = 0;
#define BRANCH_ACTIVITY_THRESHOLD 50
#define arm_update_pc() \
pc = reg[REG_PC] \
#define arm_pc_offset(val) \
pc += val; \
reg[REG_PC] = pc \
#define arm_pc_offset_update(val) \
pc += val; \
reg[REG_PC] = pc \
#define arm_pc_offset_update_direct(val) \
pc = val; \
reg[REG_PC] = pc \
// It should be okay to still generate result flags, spsr will overwrite them.
// This is pretty infrequent (returning from interrupt handlers, et al) so
// probably not worth optimizing for.
#define check_for_interrupts() \
if((io_registers[REG_IE] & io_registers[REG_IF]) && \
io_registers[REG_IME] && ((reg[REG_CPSR] & 0x80) == 0)) \
{ \
reg_mode[MODE_IRQ][6] = reg[REG_PC] + 4; \
spsr[MODE_IRQ] = reg[REG_CPSR]; \
reg[REG_CPSR] = 0xD2; \
reg[REG_PC] = 0x00000018; \
arm_update_pc(); \
set_cpu_mode(MODE_IRQ); \
goto arm_loop; \
} \
#define arm_spsr_restore() \
if(rd == 15) \
{ \
if(reg[CPU_MODE] != MODE_USER) \
{ \
reg[REG_CPSR] = spsr[reg[CPU_MODE]]; \
extract_flags(); \
set_cpu_mode(cpu_modes[reg[REG_CPSR] & 0x1F]); \
check_for_interrupts(); \
} \
arm_update_pc(); \
\
if(reg[REG_CPSR] & 0x20) \
goto thumb_loop; \
} \
#define arm_data_proc_flags_reg() \
arm_decode_data_proc_reg(); \
calculate_reg_sh_flags() \
#define arm_data_proc_reg() \
arm_decode_data_proc_reg(); \
calculate_reg_sh() \
#define arm_data_proc_flags_imm() \
arm_decode_data_proc_imm() \
#define arm_data_proc_imm() \
arm_decode_data_proc_imm() \
#define arm_data_proc(expr, type) \
{ \
u32 dest; \
arm_pc_offset(8); \
arm_data_proc_##type(); \
dest = expr; \
arm_pc_offset(-4); \
reg[rd] = dest; \
\
if(rd == 15) \
{ \
arm_update_pc(); \
} \
} \
#define flags_vars(src_a, src_b) \
u32 dest; \
const u32 _sa = src_a; \
const u32 _sb = src_b \
#define arm_data_proc_logic_flags(expr, type) \
{ \
arm_pc_offset(8); \
arm_data_proc_flags_##type(); \
u32 dest = expr; \
calculate_flags_logic(dest); \
arm_pc_offset(-4); \
reg[rd] = dest; \
arm_spsr_restore(); \
} \
#define arm_data_proc_add_flags(src_a, src_b, type) \
{ \
arm_pc_offset(8); \
arm_data_proc_##type(); \
flags_vars(src_a, src_b); \
dest = _sa + _sb; \
calculate_flags_add(dest, _sa, _sb); \
arm_pc_offset(-4); \
reg[rd] = dest; \
arm_spsr_restore(); \
}
#define arm_data_proc_sub_flags(src_a, src_b, type) \
{ \
arm_pc_offset(8); \
arm_data_proc_##type(); \
flags_vars(src_a, src_b); \
dest = _sa - _sb; \
calculate_flags_sub(dest, _sa, _sb); \
arm_pc_offset(-4); \
reg[rd] = dest; \
arm_spsr_restore(); \
} \
#define arm_data_proc_test_logic(expr, type) \
{ \
arm_pc_offset(8); \
arm_data_proc_flags_##type(); \
u32 dest = expr; \
calculate_flags_logic(dest); \
arm_pc_offset(-4); \
} \
#define arm_data_proc_test_add(src_a, src_b, type) \
{ \
arm_pc_offset(8); \
arm_data_proc_##type(); \
flags_vars(src_a, src_b); \
dest = _sa + _sb; \
calculate_flags_add(dest, _sa, _sb); \
arm_pc_offset(-4); \
} \
#define arm_data_proc_test_sub(src_a, src_b, type) \
{ \
arm_pc_offset(8); \
arm_data_proc_##type(); \
flags_vars(src_a, src_b); \
dest = _sa - _sb; \
calculate_flags_sub(dest, _sa, _sb); \
arm_pc_offset(-4); \
} \
#define arm_multiply_flags_yes(_dest) \
calculate_z_flag(_dest); \
calculate_n_flag(_dest); \
#define arm_multiply_flags_no(_dest) \
#define arm_multiply_long_flags_yes(_dest_lo, _dest_hi) \
z_flag = (_dest_lo == 0) & (_dest_hi == 0); \
calculate_n_flag(_dest_hi) \
#define arm_multiply_long_flags_no(_dest_lo, _dest_hi) \
#define arm_multiply(add_op, flags) \
{ \
u32 dest; \
arm_decode_multiply(); \
dest = (reg[rm] * reg[rs]) add_op; \
arm_multiply_flags_##flags(dest); \
reg[rd] = dest; \
arm_pc_offset(4); \
} \
#define arm_multiply_long_addop(type) \
+ ((type##64)((((type##64)reg[rdhi]) << 32) | reg[rdlo])); \
#define arm_multiply_long(add_op, flags, type) \
{ \
type##64 dest; \
u32 dest_lo; \
u32 dest_hi; \
arm_decode_multiply_long(); \
dest = ((type##64)((type##32)reg[rm]) * \
(type##64)((type##32)reg[rn])) add_op; \
dest_lo = (u32)dest; \
dest_hi = (u32)(dest >> 32); \
arm_multiply_long_flags_##flags(dest_lo, dest_hi); \
reg[rdlo] = dest_lo; \
reg[rdhi] = dest_hi; \
arm_pc_offset(4); \
} \
const u32 psr_masks[16] =
{
0x00000000, 0x000000FF, 0x0000FF00, 0x0000FFFF, 0x00FF0000,
0x00FF00FF, 0x00FFFF00, 0x00FFFFFF, 0xFF000000, 0xFF0000FF,
0xFF00FF00, 0xFF00FFFF, 0xFFFF0000, 0xFFFF00FF, 0xFFFFFF00,
0xFFFFFFFF
};
#define arm_psr_read(dummy, psr_reg) \
collapse_flags(); \
reg[rd] = psr_reg \
#define arm_psr_store_cpsr(source) \
reg[REG_CPSR] = (source & store_mask) | (reg[REG_CPSR] & (~store_mask)); \
extract_flags(); \
if(store_mask & 0xFF) \
{ \
set_cpu_mode(cpu_modes[reg[REG_CPSR] & 0x1F]); \
check_for_interrupts(); \
} \
#define arm_psr_store_spsr(source) \
u32 _psr = spsr[reg[CPU_MODE]]; \
spsr[reg[CPU_MODE]] = (source & store_mask) | (_psr & (~store_mask)) \
#define arm_psr_store(source, psr_reg) \
const u32 store_mask = psr_masks[psr_field]; \
arm_psr_store_##psr_reg(source) \
#define arm_psr_src_reg reg[rm]
#define arm_psr_src_imm imm
#define arm_psr(op_type, transfer_type, psr_reg) \
{ \
arm_decode_psr_##op_type(); \
arm_pc_offset(4); \
arm_psr_##transfer_type(arm_psr_src_##op_type, psr_reg); \
} \
#define arm_data_trans_reg() \
arm_decode_data_trans_reg(); \
calculate_reg_offset() \
#define arm_data_trans_imm() \
arm_decode_data_trans_imm() \
#define arm_data_trans_half_reg() \
arm_decode_half_trans_r() \
#define arm_data_trans_half_imm() \
arm_decode_half_trans_of() \
#define aligned_address_mask8 0xF0000000
#define aligned_address_mask16 0xF0000001
#define aligned_address_mask32 0xF0000003
#define fast_read_memory(size, type, address, dest) \
{ \
u8 *map; \
u32 _address = address; \
\
if(_address < 0x10000000) \
{ \
memory_region_access_read_##type[_address >> 24]++; \
memory_reads_##type++; \
} \
if(((_address >> 24) == 0) && (pc >= 0x4000)) \
{ \
dest = *((type *)((u8 *)&bios_read_protect + (_address & 0x03))); \
} \
else \
\
if(((_address & aligned_address_mask##size) == 0) && \
(map = memory_map_read[address >> 15])) \
{ \
dest = *((type *)((u8 *)map + (_address & 0x7FFF))); \
} \
else \
{ \
dest = (type)read_memory##size(_address); \
} \
} \
#define fast_read_memory_s16(address, dest) \
{ \
u8 *map; \
u32 _address = address; \
if(_address < 0x10000000) \
{ \
memory_region_access_read_s16[_address >> 24]++; \
memory_reads_s16++; \
} \
if(((_address & aligned_address_mask16) == 0) && \
(map = memory_map_read[_address >> 15])) \
{ \
dest = *((s16 *)((u8 *)map + (_address & 0x7FFF))); \
} \
else \
{ \
dest = (s16)read_memory16_signed(_address); \
} \
} \
#define fast_write_memory(size, type, address, value) \
{ \
u8 *map; \
u32 _address = (address) & ~(aligned_address_mask##size & 0x03); \
if(_address < 0x10000000) \
{ \
memory_region_access_write_##type[_address >> 24]++; \
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; \
} \
} \
#define load_aligned32(address, dest) \
{ \
u8 *map = memory_map_read[address >> 15]; \
if(address < 0x10000000) \
{ \
memory_region_access_read_u32[address >> 24]++; \
memory_reads_u32++; \
} \
if(map) \
{ \
dest = address32(map, address & 0x7FFF); \
} \
else \
{ \
dest = read_memory32(address); \
} \
} \
#define store_aligned32(address, value) \
{ \
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; \
} \
} \
#define load_memory_u8(address, dest) \
fast_read_memory(8, u8, address, dest) \
#define load_memory_u16(address, dest) \
fast_read_memory(16, u16, address, dest) \
#define load_memory_u32(address, dest) \
fast_read_memory(32, u32, address, dest) \
#define load_memory_s8(address, dest) \
fast_read_memory(8, s8, address, dest) \
#define load_memory_s16(address, dest) \
fast_read_memory_s16(address, dest) \
#define store_memory_u8(address, value) \
fast_write_memory(8, u8, address, value) \
#define store_memory_u16(address, value) \
fast_write_memory(16, u16, address, value) \
#define store_memory_u32(address, value) \
fast_write_memory(32, u32, address, value) \
#define no_op \
#define arm_access_memory_writeback_yes(off_op) \
reg[rn] = address off_op \
#define arm_access_memory_writeback_no(off_op) \
#define arm_access_memory_pc_preadjust_load() \
#define arm_access_memory_pc_preadjust_store() \
u32 reg_op = reg[rd]; \
if(rd == 15) \
reg_op += 4 \
#define arm_access_memory_pc_postadjust_load() \
arm_update_pc() \
#define arm_access_memory_pc_postadjust_store() \
#define load_reg_op reg[rd] \
#define store_reg_op reg_op \
#define arm_access_memory(access_type, off_op, off_type, mem_type, \
wb, wb_off_op) \
{ \
arm_pc_offset(8); \
arm_data_trans_##off_type(); \
u32 address = reg[rn] off_op; \
arm_access_memory_pc_preadjust_##access_type(); \
\
arm_pc_offset(-4); \
arm_access_memory_writeback_##wb(wb_off_op); \
access_type##_memory_##mem_type(address, access_type##_reg_op); \
arm_access_memory_pc_postadjust_##access_type(); \
} \
#define word_bit_count(word) \
(bit_count[word >> 8] + bit_count[word & 0xFF]) \
#define sprint_no(access_type, offset_type, writeback_type) \
#define sprint_yes(access_type, offset_type, writeback_type) \
printf("sbit on %s %s %s\n", #access_type, #offset_type, #writeback_type) \
#define arm_block_writeback_load() \
if(!((reg_list >> rn) & 0x01)) \
{ \
reg[rn] = address; \
} \
#define arm_block_writeback_store() \
reg[rn] = address \
#define arm_block_writeback_yes(access_type) \
arm_block_writeback_##access_type() \
#define arm_block_writeback_no(access_type) \
#define load_block_memory(address, dest) \
dest = address32(address_region, (address + offset) & 0x7FFF) \
#define store_block_memory(address, dest) \
address32(address_region, (address + offset) & 0x7FFF) = dest \
#define arm_block_memory_offset_down_a() \
(base - (word_bit_count(reg_list) * 4) + 4) \
#define arm_block_memory_offset_down_b() \
(base - (word_bit_count(reg_list) * 4)) \
#define arm_block_memory_offset_no() \
(base) \
#define arm_block_memory_offset_up() \
(base + 4) \
#define arm_block_memory_writeback_down() \
reg[rn] = base - (word_bit_count(reg_list) * 4) \
#define arm_block_memory_writeback_up() \
reg[rn] = base + (word_bit_count(reg_list) * 4) \
#define arm_block_memory_writeback_no() \
#define arm_block_memory_load_pc() \
load_aligned32(address, pc); \
reg[REG_PC] = pc \
#define arm_block_memory_store_pc() \
store_aligned32(address, pc + 4) \
#define arm_block_memory(access_type, offset_type, writeback_type, s_bit) \
{ \
arm_decode_block_trans(); \
u32 base = reg[rn]; \
u32 address = arm_block_memory_offset_##offset_type() & 0xFFFFFFFC; \
u32 i; \
\
arm_block_memory_writeback_##writeback_type(); \
\
for(i = 0; i < 15; i++) \
{ \
if((reg_list >> i) & 0x01) \
{ \
access_type##_aligned32(address, reg[i]); \
address += 4; \
} \
} \
\
arm_pc_offset(4); \
if(reg_list & 0x8000) \
{ \
arm_block_memory_##access_type##_pc(); \
} \
} \
#define arm_swap(type) \
{ \
arm_decode_swap(); \
u32 temp; \
load_memory_##type(reg[rn], temp); \
store_memory_##type(reg[rn], reg[rm]); \
reg[rd] = temp; \
arm_pc_offset(4); \
} \
#define arm_next_instruction() \
{ \
arm_pc_offset(4); \
goto skip_instruction; \
} \
#define thumb_update_pc() \
pc = reg[REG_PC] \
#define thumb_pc_offset(val) \
pc += val; \
reg[REG_PC] = pc \
#define thumb_pc_offset_update(val) \
pc += val; \
reg[REG_PC] = pc \
#define thumb_pc_offset_update_direct(val) \
pc = val; \
reg[REG_PC] = pc \
// Types: add_sub, add_sub_imm, alu_op, imm
// Affects N/Z/C/V flags
#define thumb_add(type, dest_reg, src_a, src_b) \
{ \
thumb_decode_##type(); \
const u32 _sa = src_a; \
const u32 _sb = src_b; \
u32 dest = _sa + _sb; \
calculate_flags_add(dest, src_a, src_b); \
reg[dest_reg] = dest; \
thumb_pc_offset(2); \
} \
#define thumb_add_noflags(type, dest_reg, src_a, src_b) \
{ \
thumb_decode_##type(); \
u32 dest = src_a + src_b; \
reg[dest_reg] = dest; \
thumb_pc_offset(2); \
} \
#define thumb_sub(type, dest_reg, src_a, src_b) \
{ \
thumb_decode_##type(); \
const u32 _sa = src_a; \
const u32 _sb = src_b; \
u32 dest = _sa - _sb; \
calculate_flags_sub(dest, src_a, src_b); \
reg[dest_reg] = dest; \
thumb_pc_offset(2); \
} \
// Affects N/Z flags
#define thumb_logic(type, dest_reg, expr) \
{ \
thumb_decode_##type(); \
u32 dest = expr; \
calculate_flags_logic(dest); \
reg[dest_reg] = dest; \
thumb_pc_offset(2); \
} \
// Decode types: shift, alu_op
// Operation types: lsl, lsr, asr, ror
// Affects N/Z/C flags
#define thumb_shift_lsl_reg() \
u32 shift = reg[rs]; \
u32 dest = reg[rd]; \
if(shift != 0) \
{ \
if(shift > 31) \
{ \
if(shift == 32) \
c_flag = dest & 0x01; \
else \
c_flag = 0; \
dest = 0; \
} \
else \
{ \
c_flag = (dest >> (32 - shift)) & 0x01; \
dest <<= shift; \
} \
} \
#define thumb_shift_lsr_reg() \
u32 shift = reg[rs]; \
u32 dest = reg[rd]; \
if(shift != 0) \
{ \
if(shift > 31) \
{ \
if(shift == 32) \
c_flag = dest >> 31; \
else \
c_flag = 0; \
dest = 0; \
} \
else \
{ \
c_flag = (dest >> (shift - 1)) & 0x01; \
dest >>= shift; \
} \
} \
#define thumb_shift_asr_reg() \
u32 shift = reg[rs]; \
u32 dest = reg[rd]; \
if(shift != 0) \
{ \
if(shift > 31) \
{ \
dest = (s32)dest >> 31; \
c_flag = dest & 0x01; \
} \
else \
{ \
c_flag = (dest >> (shift - 1)) & 0x01; \
dest = (s32)dest >> shift; \
} \
} \
#define thumb_shift_ror_reg() \
u32 shift = reg[rs]; \
u32 dest = reg[rd]; \
if(shift != 0) \
{ \
c_flag = (dest >> (shift - 1)) & 0x01; \
ror(dest, dest, shift); \
} \
#define thumb_shift_lsl_imm() \
u32 dest = reg[rs]; \
if(imm != 0) \
{ \
c_flag = (dest >> (32 - imm)) & 0x01; \
dest <<= imm; \
} \
#define thumb_shift_lsr_imm() \
u32 dest; \
if(imm == 0) \
{ \
dest = 0; \
c_flag = reg[rs] >> 31; \
} \
else \
{ \
dest = reg[rs]; \
c_flag = (dest >> (imm - 1)) & 0x01; \
dest >>= imm; \
} \
#define thumb_shift_asr_imm() \
u32 dest; \
if(imm == 0) \
{ \
dest = (s32)reg[rs] >> 31; \
c_flag = dest & 0x01; \
} \
else \
{ \
dest = reg[rs]; \
c_flag = (dest >> (imm - 1)) & 0x01; \
dest = (s32)dest >> imm; \
} \
#define thumb_shift_ror_imm() \
u32 dest = reg[rs]; \
if(imm == 0) \
{ \
u32 old_c_flag = c_flag; \
c_flag = dest & 0x01; \
dest = (dest >> 1) | (old_c_flag << 31); \
} \
else \
{ \
c_flag = (dest >> (imm - 1)) & 0x01; \
ror(dest, dest, imm); \
} \
#define thumb_shift(decode_type, op_type, value_type) \
{ \
thumb_decode_##decode_type(); \
thumb_shift_##op_type##_##value_type(); \
calculate_flags_logic(dest); \
reg[rd] = dest; \
thumb_pc_offset(2); \
} \
#define thumb_test_add(type, src_a, src_b) \
{ \
thumb_decode_##type(); \
const u32 _sa = src_a; \
const u32 _sb = src_b; \
u32 dest = _sa + _sb; \
calculate_flags_add(dest, src_a, src_b); \
thumb_pc_offset(2); \
} \
#define thumb_test_sub(type, src_a, src_b) \
{ \
thumb_decode_##type(); \
const u32 _sa = src_a; \
const u32 _sb = src_b; \
u32 dest = _sa - _sb; \
calculate_flags_sub(dest, src_a, src_b); \
thumb_pc_offset(2); \
} \
#define thumb_test_logic(type, expr) \
{ \
thumb_decode_##type(); \
u32 dest = expr; \
calculate_flags_logic(dest); \
thumb_pc_offset(2); \
}
#define thumb_hireg_op(expr) \
{ \
thumb_pc_offset(4); \
thumb_decode_hireg_op(); \
u32 dest = expr; \
thumb_pc_offset(-2); \
if(rd == 15) \
{ \
reg[REG_PC] = dest & ~0x01; \
thumb_update_pc(); \
} \
else \
{ \
reg[rd] = dest; \
} \
} \
// Operation types: imm, mem_reg, mem_imm
#define thumb_access_memory(access_type, op_type, address, reg_op, \
mem_type) \
{ \
thumb_decode_##op_type(); \
access_type##_memory_##mem_type(address, reg_op); \
thumb_pc_offset(2); \
} \
#define thumb_block_address_preadjust_no_op() \
#define thumb_block_address_preadjust_up() \
address += bit_count[reg_list] * 4 \
#define thumb_block_address_preadjust_down() \
address -= bit_count[reg_list] * 4 \
#define thumb_block_address_preadjust_push_lr() \
address -= (bit_count[reg_list] + 1) * 4 \
#define thumb_block_address_postadjust_no_op() \
#define thumb_block_address_postadjust_up() \
address += offset \
#define thumb_block_address_postadjust_down() \
address -= offset \
#define thumb_block_address_postadjust_pop_pc() \
load_memory_u32(address + offset, pc); \
pc &= ~0x01; \
reg[REG_PC] = pc; \
address += offset + 4 \
#define thumb_block_address_postadjust_push_lr() \
store_memory_u32(address + offset, reg[REG_LR]); \
#define thumb_block_memory_wb_load(base_reg) \
if(!((reg_list >> base_reg) & 0x01)) \
{ \
reg[base_reg] = address; \
} \
#define thumb_block_memory_wb_store(base_reg) \
reg[base_reg] = address \
#define thumb_block_memory(access_type, pre_op, post_op, base_reg) \
{ \
u32 i; \
u32 offset = 0; \
thumb_decode_rlist(); \
using_register(thumb, base_reg, memory_base); \
u32 address = reg[base_reg] & ~0x03; \
thumb_block_address_preadjust_##pre_op(); \
\
for(i = 0; i < 8; i++) \
{ \
if((reg_list >> i) & 1) \
{ \
access_type##_aligned32(address + offset, reg[i]); \
offset += 4; \
} \
} \
\
thumb_pc_offset(2); \
\
thumb_block_address_postadjust_##post_op(); \
thumb_block_memory_wb_##access_type(base_reg); \
} \
#define thumb_conditional_branch(condition) \
{ \
thumb_decode_branch_cond(); \
if(condition) \
{ \
thumb_pc_offset((offset * 2) + 4); \
} \
else \
{ \
thumb_pc_offset(2); \
} \
} \
// When a mode change occurs from non-FIQ to non-FIQ retire the current
// reg[13] and reg[14] into reg_mode[cpu_mode][5] and reg_mode[cpu_mode][6]
// respectively and load into reg[13] and reg[14] reg_mode[new_mode][5] and
// reg_mode[new_mode][6]. When swapping to/from FIQ retire/load reg[8]
// through reg[14] to/from reg_mode[MODE_FIQ][0] through reg_mode[MODE_FIQ][6].
u32 reg_mode[7][7];
u32 cpu_modes[32] =
{
MODE_INVALID, MODE_INVALID, MODE_INVALID, MODE_INVALID, MODE_INVALID,
MODE_INVALID, MODE_INVALID, MODE_INVALID, MODE_INVALID, MODE_INVALID,
MODE_INVALID, MODE_INVALID, MODE_INVALID, MODE_INVALID, MODE_INVALID,
MODE_INVALID, MODE_USER, MODE_FIQ, MODE_IRQ, MODE_SUPERVISOR, MODE_INVALID,
MODE_INVALID, MODE_INVALID, MODE_ABORT, MODE_INVALID, MODE_INVALID,
MODE_INVALID, MODE_INVALID, MODE_UNDEFINED, MODE_INVALID, MODE_INVALID,
MODE_USER
};
u32 cpu_modes_cpsr[7] = { 0x10, 0x11, 0x12, 0x13, 0x17, 0x1B, 0x1F };
// When switching modes set spsr[new_mode] to cpsr. Modifying PC as the
// target of a data proc instruction will set cpsr to spsr[cpu_mode].
u32 initial_reg[64];
u32 *reg = initial_reg;
u32 spsr[6];
// ARM/Thumb mode is stored in the flags directly, this is simpler than
// shadowing it since it has a constant 1bit represenation.
char *reg_names[16] =
{
" r0", " r1", " r2", " r3", " r4", " r5", " r6", " r7",
" r8", " r9", "r10", " fp", " ip", " sp", " lr", " pc"
};
char *cpu_mode_names[] =
{
"user", "irq", "fiq", "svsr", "abrt", "undf", "invd"
};
#define execute_arm_instruction() \
using_instruction(arm); \
check_pc_region(); \
pc &= ~0x03; \
opcode = address32(pc_address_block, (pc & 0x7FFF)); \
condition = opcode >> 28; \
\
switch(condition) \
{ \
case 0x0: \
/* EQ */ \
if(!z_flag) \
arm_next_instruction(); \
break; \
\
case 0x1: \
/* NE */ \
if(z_flag) \
arm_next_instruction(); \
break; \
\
case 0x2: \
/* CS */ \
if(!c_flag) \
arm_next_instruction(); \
break; \
\
case 0x3: \
/* CC */ \
if(c_flag) \
arm_next_instruction(); \
break; \
\
case 0x4: \
/* MI */ \
if(!n_flag) \
arm_next_instruction(); \
break; \
\
case 0x5: \
/* PL */ \
if(n_flag) \
arm_next_instruction(); \
break; \
\
case 0x6: \
/* VS */ \
if(!v_flag) \
arm_next_instruction(); \
break; \
\
case 0x7: \
/* VC */ \
if(v_flag) \
arm_next_instruction(); \
break; \
\
case 0x8: \
/* HI */ \
if((c_flag == 0) | z_flag) \
arm_next_instruction(); \
break; \
\
case 0x9: \
/* LS */ \
if(c_flag & (z_flag ^ 1)) \
arm_next_instruction(); \
break; \
\
case 0xA: \
/* GE */ \
if(n_flag != v_flag) \
arm_next_instruction(); \
break; \
\
case 0xB: \
/* LT */ \
if(n_flag == v_flag) \
arm_next_instruction(); \
break; \
\
case 0xC: \
/* GT */ \
if(z_flag | (n_flag != v_flag)) \
arm_next_instruction(); \
break; \
\
case 0xD: \
/* LE */ \
if((z_flag == 0) & (n_flag == v_flag)) \
arm_next_instruction(); \
break; \
\
case 0xE: \
/* AL */ \
break; \
\
case 0xF: \
/* Reserved - treat as "never" */ \
quit(); \
arm_next_instruction(); \
break; \
} \
\
switch((opcode >> 20) & 0xFF) \
{ \
case 0x00: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn], -rm */ \
arm_access_memory(store, no_op, half_reg, u16, yes, - reg[rm]); \
} \
else \
{ \
/* MUL rd, rm, rs */ \
arm_multiply(no_op, no); \
} \
} \
else \
{ \
/* AND rd, rn, reg_op */ \
arm_data_proc(reg[rn] & reg_sh, reg); \
} \
break; \
\
case 0x01: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 0: \
/* MULS rd, rm, rs */ \
arm_multiply(no_op, yes); \
break; \
\
case 1: \
/* LDRH rd, [rn], -rm */ \
arm_access_memory(load, no_op, half_reg, u16, yes, - reg[rm]); \
break; \
\
case 2: \
/* LDRSB rd, [rn], -rm */ \
arm_access_memory(load, no_op, half_reg, s8, yes, - reg[rm]); \
break; \
\
case 3: \
/* LDRSH rd, [rn], -rm */ \
arm_access_memory(load, no_op, half_reg, s16, yes, - reg[rm]); \
break; \
} \
} \
else \
{ \
/* ANDS rd, rn, reg_op */ \
arm_data_proc_logic_flags(reg[rn] & reg_sh, reg); \
} \
break; \
\
case 0x02: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn], -rm */ \
arm_access_memory(store, no_op, half_reg, u16, yes, - reg[rm]); \
} \
else \
{ \
/* MLA rd, rm, rs, rn */ \
arm_multiply(+ reg[rn], no); \
} \
} \
else \
{ \
/* EOR rd, rn, reg_op */ \
arm_data_proc(reg[rn] ^ reg_sh, reg); \
} \
break; \
\
case 0x03: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 0: \
/* MLAS rd, rm, rs, rn */ \
arm_multiply(+ reg[rn], yes); \
break; \
\
case 1: \
/* LDRH rd, [rn], -rm */ \
arm_access_memory(load, no_op, half_reg, u16, yes, - reg[rm]); \
break; \
\
case 2: \
/* LDRSB rd, [rn], -rm */ \
arm_access_memory(load, no_op, half_reg, s8, yes, - reg[rm]); \
break; \
\
case 3: \
/* LDRSH rd, [rn], -rm */ \
arm_access_memory(load, no_op, half_reg, s16, yes, - reg[rm]); \
break; \
} \
} \
else \
{ \
/* EORS rd, rn, reg_op */ \
arm_data_proc_logic_flags(reg[rn] ^ reg_sh, reg); \
} \
break; \
\
case 0x04: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn], -imm */ \
arm_access_memory(store, no_op, half_imm, u16, yes, - offset); \
} \
else \
{ \
/* SUB rd, rn, reg_op */ \
arm_data_proc(reg[rn] - reg_sh, reg); \
} \
break; \
\
case 0x05: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn], -imm */ \
arm_access_memory(load, no_op, half_imm, u16, yes, - offset); \
break; \
\
case 2: \
/* LDRSB rd, [rn], -imm */ \
arm_access_memory(load, no_op, half_imm, s8, yes, - offset); \
break; \
\
case 3: \
/* LDRSH rd, [rn], -imm */ \
arm_access_memory(load, no_op, half_imm, s16, yes, - offset); \
break; \
} \
} \
else \
{ \
/* SUBS rd, rn, reg_op */ \
arm_data_proc_sub_flags(reg[rn], reg_sh, reg); \
} \
break; \
\
case 0x06: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn], -imm */ \
arm_access_memory(store, no_op, half_imm, u16, yes, - offset); \
} \
else \
{ \
/* RSB rd, rn, reg_op */ \
arm_data_proc(reg_sh - reg[rn], reg); \
} \
break; \
\
case 0x07: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn], -imm */ \
arm_access_memory(load, no_op, half_imm, u16, yes, - offset); \
break; \
\
case 2: \
/* LDRSB rd, [rn], -imm */ \
arm_access_memory(load, no_op, half_imm, s8, yes, - offset); \
break; \
\
case 3: \
/* LDRSH rd, [rn], -imm */ \
arm_access_memory(load, no_op, half_imm, s16, yes, - offset); \
break; \
} \
} \
else \
{ \
/* RSBS rd, rn, reg_op */ \
arm_data_proc_sub_flags(reg_sh, reg[rn], reg); \
} \
break; \
\
case 0x08: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn], +rm */ \
arm_access_memory(store, no_op, half_reg, u16, yes, + reg[rm]); \
} \
else \
{ \
/* UMULL rd, rm, rs */ \
arm_multiply_long(no_op, no, u); \
} \
} \
else \
{ \
/* ADD rd, rn, reg_op */ \
arm_data_proc(reg[rn] + reg_sh, reg); \
} \
break; \
\
case 0x09: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 0: \
/* UMULLS rdlo, rdhi, rm, rs */ \
arm_multiply_long(no_op, yes, u); \
break; \
\
case 1: \
/* LDRH rd, [rn], +rm */ \
arm_access_memory(load, no_op, half_reg, u16, yes, + reg[rm]); \
break; \
\
case 2: \
/* LDRSB rd, [rn], +rm */ \
arm_access_memory(load, no_op, half_reg, s8, yes, + reg[rm]); \
break; \
\
case 3: \
/* LDRSH rd, [rn], +rm */ \
arm_access_memory(load, no_op, half_reg, s16, yes, + reg[rm]); \
break; \
} \
} \
else \
{ \
/* ADDS rd, rn, reg_op */ \
arm_data_proc_add_flags(reg[rn], reg_sh, reg); \
} \
break; \
\
case 0x0A: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn], +rm */ \
arm_access_memory(store, no_op, half_reg, u16, yes, + reg[rm]); \
} \
else \
{ \
/* UMLAL rd, rm, rs */ \
arm_multiply_long(arm_multiply_long_addop(u), no, u); \
} \
} \
else \
{ \
/* ADC rd, rn, reg_op */ \
arm_data_proc(reg[rn] + reg_sh + c_flag, reg); \
} \
break; \
\
case 0x0B: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 0: \
/* UMLALS rdlo, rdhi, rm, rs */ \
arm_multiply_long(arm_multiply_long_addop(u), yes, u); \
break; \
\
case 1: \
/* LDRH rd, [rn], +rm */ \
arm_access_memory(load, no_op, half_reg, u16, yes, + reg[rm]); \
break; \
\
case 2: \
/* LDRSB rd, [rn], +rm */ \
arm_access_memory(load, no_op, half_reg, s8, yes, + reg[rm]); \
break; \
\
case 3: \
/* LDRSH rd, [rn], +rm */ \
arm_access_memory(load, no_op, half_reg, s16, yes, + reg[rm]); \
break; \
} \
} \
else \
{ \
/* ADCS rd, rn, reg_op */ \
arm_data_proc_add_flags(reg[rn], reg_sh + c_flag, reg); \
} \
break; \
\
case 0x0C: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn], +imm */ \
arm_access_memory(store, no_op, half_imm, u16, yes, + offset); \
} \
else \
{ \
/* SMULL rd, rm, rs */ \
arm_multiply_long(no_op, no, s); \
} \
} \
else \
{ \
/* SBC rd, rn, reg_op */ \
arm_data_proc(reg[rn] - (reg_sh + (c_flag ^ 1)), reg); \
} \
break; \
\
case 0x0D: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 0: \
/* SMULLS rdlo, rdhi, rm, rs */ \
arm_multiply_long(no_op, yes, s); \
break; \
\
case 1: \
/* LDRH rd, [rn], +imm */ \
arm_access_memory(load, no_op, half_imm, u16, yes, + offset); \
break; \
\
case 2: \
/* LDRSB rd, [rn], +imm */ \
arm_access_memory(load, no_op, half_imm, s8, yes, + offset); \
break; \
\
case 3: \
/* LDRSH rd, [rn], +imm */ \
arm_access_memory(load, no_op, half_imm, s16, yes, + offset); \
break; \
} \
} \
else \
{ \
/* SBCS rd, rn, reg_op */ \
arm_data_proc_sub_flags(reg[rn], (reg_sh + (c_flag ^ 1)), reg); \
} \
break; \
\
case 0x0E: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn], +imm */ \
arm_access_memory(store, no_op, half_imm, u16, yes, + offset); \
} \
else \
{ \
/* SMLAL rd, rm, rs */ \
arm_multiply_long(arm_multiply_long_addop(s), no, s); \
} \
} \
else \
{ \
/* RSC rd, rn, reg_op */ \
arm_data_proc(reg_sh - reg[rn] + c_flag - 1, reg); \
} \
break; \
\
case 0x0F: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 0: \
/* SMLALS rdlo, rdhi, rm, rs */ \
arm_multiply_long(arm_multiply_long_addop(s), yes, s); \
break; \
\
case 1: \
/* LDRH rd, [rn], +imm */ \
arm_access_memory(load, no_op, half_imm, u16, yes, + offset); \
break; \
\
case 2: \
/* LDRSB rd, [rn], +imm */ \
arm_access_memory(load, no_op, half_imm, s8, yes, + offset); \
break; \
\
case 3: \
/* LDRSH rd, [rn], +imm */ \
arm_access_memory(load, no_op, half_imm, s16, yes, + offset); \
break; \
} \
} \
else \
{ \
/* RSCS rd, rn, reg_op */ \
arm_data_proc_sub_flags((reg_sh + c_flag - 1), reg[rn], reg); \
} \
break; \
\
case 0x10: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn - rm] */ \
arm_access_memory(store, - reg[rm], half_reg, u16, no, no_op); \
} \
else \
{ \
/* SWP rd, rm, [rn] */ \
arm_swap(u32); \
} \
} \
else \
{ \
/* MRS rd, cpsr */ \
arm_psr(reg, read, reg[REG_CPSR]); \
} \
break; \
\
case 0x11: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn - rm] */ \
arm_access_memory(load, - reg[rm], half_reg, u16, no, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn - rm] */ \
arm_access_memory(load, - reg[rm], half_reg, s8, no, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn - rm] */ \
arm_access_memory(load, - reg[rm], half_reg, s16, no, no_op); \
break; \
} \
} \
else \
{ \
/* TST rd, rn, reg_op */ \
arm_data_proc_test_logic(reg[rn] & reg_sh, reg); \
} \
break; \
\
case 0x12: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn - rm]! */ \
arm_access_memory(store, - reg[rm], half_reg, u16, yes, no_op); \
} \
else \
{ \
if(opcode & 0x10) \
{ \
/* BX rn */ \
arm_decode_branchx(); \
u32 src = reg[rn]; \
if(src & 0x01) \
{ \
src -= 1; \
arm_pc_offset_update_direct(src); \
reg[REG_CPSR] |= 0x20; \
goto thumb_loop; \
} \
else \
{ \
arm_pc_offset_update_direct(src); \
} \
} \
else \
{ \
/* MSR cpsr, rm */ \
arm_psr(reg, store, cpsr); \
} \
} \
break; \
\
case 0x13: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn - rm]! */ \
arm_access_memory(load, - reg[rm], half_reg, u16, yes, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn - rm]! */ \
arm_access_memory(load, - reg[rm], half_reg, s8, yes, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn - rm]! */ \
arm_access_memory(load, - reg[rm], half_reg, s16, yes, no_op); \
break; \
} \
} \
else \
{ \
/* TEQ rd, rn, reg_op */ \
arm_data_proc_test_logic(reg[rn] ^ reg_sh, reg); \
} \
break; \
\
case 0x14: \
if((opcode & 0x90) == 0x90) \
{ \
if(opcode & 0x20) \
{ \
/* STRH rd, [rn - imm] */ \
arm_access_memory(store, - offset, half_imm, u16, no, no_op); \
} \
else \
{ \
/* SWPB rd, rm, [rn] */ \
arm_swap(u8); \
} \
} \
else \
{ \
/* MRS rd, spsr */ \
arm_psr(reg, read, spsr[reg[CPU_MODE]]); \
} \
break; \
\
case 0x15: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn - imm] */ \
arm_access_memory(load, - offset, half_imm, u16, no, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn - imm] */ \
arm_access_memory(load, - offset, half_imm, s8, no, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn - imm] */ \
arm_access_memory(load, - offset, half_imm, s16, no, no_op); \
break; \
} \
} \
else \
{ \
/* CMP rn, reg_op */ \
arm_data_proc_test_sub(reg[rn], reg_sh, reg); \
} \
break; \
\
case 0x16: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn - imm]! */ \
arm_access_memory(store, - offset, half_imm, u16, yes, no_op); \
} \
else \
{ \
/* MSR spsr, rm */ \
arm_psr(reg, store, spsr); \
} \
break; \
\
case 0x17: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn - imm]! */ \
arm_access_memory(load, - offset, half_imm, u16, yes, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn - imm]! */ \
arm_access_memory(load, - offset, half_imm, s8, yes, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn - imm]! */ \
arm_access_memory(load, - offset, half_imm, s16, yes, no_op); \
break; \
} \
} \
else \
{ \
/* CMN rd, rn, reg_op */ \
arm_data_proc_test_add(reg[rn], reg_sh, reg); \
} \
break; \
\
case 0x18: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn + rm] */ \
arm_access_memory(store, + reg[rm], half_reg, u16, no, no_op); \
} \
else \
{ \
/* ORR rd, rn, reg_op */ \
arm_data_proc(reg[rn] | reg_sh, reg); \
} \
break; \
\
case 0x19: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn + rm] */ \
arm_access_memory(load, + reg[rm], half_reg, u16, no, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn + rm] */ \
arm_access_memory(load, + reg[rm], half_reg, s8, no, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn + rm] */ \
arm_access_memory(load, + reg[rm], half_reg, s16, no, no_op); \
break; \
} \
} \
else \
{ \
/* ORRS rd, rn, reg_op */ \
arm_data_proc_logic_flags(reg[rn] | reg_sh, reg); \
} \
break; \
\
case 0x1A: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn + rm]! */ \
arm_access_memory(store, + reg[rm], half_reg, u16, yes, no_op); \
} \
else \
{ \
/* MOV rd, reg_op */ \
arm_data_proc(reg_sh, reg); \
} \
break; \
\
case 0x1B: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn + rm]! */ \
arm_access_memory(load, + reg[rm], half_reg, u16, yes, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn + rm]! */ \
arm_access_memory(load, + reg[rm], half_reg, s8, yes, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn + rm]! */ \
arm_access_memory(load, + reg[rm], half_reg, s16, yes, no_op); \
break; \
} \
} \
else \
{ \
/* MOVS rd, reg_op */ \
arm_data_proc_logic_flags(reg_sh, reg); \
} \
break; \
\
case 0x1C: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn + imm] */ \
arm_access_memory(store, + offset, half_imm, u16, no, no_op); \
} \
else \
{ \
/* BIC rd, rn, reg_op */ \
arm_data_proc(reg[rn] & (~reg_sh), reg); \
} \
break; \
\
case 0x1D: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn + imm] */ \
arm_access_memory(load, + offset, half_imm, u16, no, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn + imm] */ \
arm_access_memory(load, + offset, half_imm, s8, no, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn + imm] */ \
arm_access_memory(load, + offset, half_imm, s16, no, no_op); \
break; \
} \
} \
else \
{ \
/* BICS rd, rn, reg_op */ \
arm_data_proc_logic_flags(reg[rn] & (~reg_sh), reg); \
} \
break; \
\
case 0x1E: \
if((opcode & 0x90) == 0x90) \
{ \
/* STRH rd, [rn + imm]! */ \
arm_access_memory(store, + offset, half_imm, u16, yes, no_op); \
} \
else \
{ \
/* MVN rd, reg_op */ \
arm_data_proc(~reg_sh, reg); \
} \
break; \
\
case 0x1F: \
if((opcode & 0x90) == 0x90) \
{ \
switch((opcode >> 5) & 0x03) \
{ \
case 1: \
/* LDRH rd, [rn + imm]! */ \
arm_access_memory(load, + offset, half_imm, u16, yes, no_op); \
break; \
\
case 2: \
/* LDRSB rd, [rn + imm]! */ \
arm_access_memory(load, + offset, half_imm, s8, yes, no_op); \
break; \
\
case 3: \
/* LDRSH rd, [rn + imm]! */ \
arm_access_memory(load, + offset, half_imm, s16, yes, no_op); \
break; \
} \
} \
else \
{ \
/* MVNS rd, rn, reg_op */ \
arm_data_proc_logic_flags(~reg_sh, reg); \
} \
break; \
\
case 0x20: \
/* AND rd, rn, imm */ \
arm_data_proc(reg[rn] & imm, imm); \
break; \
\
case 0x21: \
/* ANDS rd, rn, imm */ \
arm_data_proc_logic_flags(reg[rn] & imm, imm); \
break; \
\
case 0x22: \
/* EOR rd, rn, imm */ \
arm_data_proc(reg[rn] ^ imm, imm); \
break; \
\
case 0x23: \
/* EORS rd, rn, imm */ \
arm_data_proc_logic_flags(reg[rn] ^ imm, imm); \
break; \
\
case 0x24: \
/* SUB rd, rn, imm */ \
arm_data_proc(reg[rn] - imm, imm); \
break; \
\
case 0x25: \
/* SUBS rd, rn, imm */ \
arm_data_proc_sub_flags(reg[rn], imm, imm); \
break; \
\
case 0x26: \
/* RSB rd, rn, imm */ \
arm_data_proc(imm - reg[rn], imm); \
break; \
\
case 0x27: \
/* RSBS rd, rn, imm */ \
arm_data_proc_sub_flags(imm, reg[rn], imm); \
break; \
\
case 0x28: \
/* ADD rd, rn, imm */ \
arm_data_proc(reg[rn] + imm, imm); \
break; \
\
case 0x29: \
/* ADDS rd, rn, imm */ \
arm_data_proc_add_flags(reg[rn], imm, imm); \
break; \
\
case 0x2A: \
/* ADC rd, rn, imm */ \
arm_data_proc(reg[rn] + imm + c_flag, imm); \
break; \
\
case 0x2B: \
/* ADCS rd, rn, imm */ \
arm_data_proc_add_flags(reg[rn] + imm, c_flag, imm); \
break; \
\
case 0x2C: \
/* SBC rd, rn, imm */ \
arm_data_proc(reg[rn] - imm + c_flag - 1, imm); \
break; \
\
case 0x2D: \
/* SBCS rd, rn, imm */ \
arm_data_proc_sub_flags(reg[rn], (imm + (c_flag ^ 1)), imm); \
break; \
\
case 0x2E: \
/* RSC rd, rn, imm */ \
arm_data_proc(imm - reg[rn] + c_flag - 1, imm); \
break; \
\
case 0x2F: \
/* RSCS rd, rn, imm */ \
arm_data_proc_sub_flags((imm + c_flag - 1), reg[rn], imm); \
break; \
\
case 0x30 ... 0x31: \
/* TST rn, imm */ \
arm_data_proc_test_logic(reg[rn] & imm, imm); \
break; \
\
case 0x32: \
/* MSR cpsr, imm */ \
arm_psr(imm, store, cpsr); \
break; \
\
case 0x33: \
/* TEQ rn, imm */ \
arm_data_proc_test_logic(reg[rn] ^ imm, imm); \
break; \
\
case 0x34 ... 0x35: \
/* CMP rn, imm */ \
arm_data_proc_test_sub(reg[rn], imm, imm); \
break; \
\
case 0x36: \
/* MSR spsr, imm */ \
arm_psr(imm, store, spsr); \
break; \
\
case 0x37: \
/* CMN rn, imm */ \
arm_data_proc_test_add(reg[rn], imm, imm); \
break; \
\
case 0x38: \
/* ORR rd, rn, imm */ \
arm_data_proc(reg[rn] | imm, imm); \
break; \
\
case 0x39: \
/* ORRS rd, rn, imm */ \
arm_data_proc_logic_flags(reg[rn] | imm, imm); \
break; \
\
case 0x3A: \
/* MOV rd, imm */ \
arm_data_proc(imm, imm); \
break; \
\
case 0x3B: \
/* MOVS rd, imm */ \
arm_data_proc_logic_flags(imm, imm); \
break; \
\
case 0x3C: \
/* BIC rd, rn, imm */ \
arm_data_proc(reg[rn] & (~imm), imm); \
break; \
\
case 0x3D: \
/* BICS rd, rn, imm */ \
arm_data_proc_logic_flags(reg[rn] & (~imm), imm); \
break; \
\
case 0x3E: \
/* MVN rd, imm */ \
arm_data_proc(~imm, imm); \
break; \
\
case 0x3F: \
/* MVNS rd, imm */ \
arm_data_proc_logic_flags(~imm, imm); \
break; \
\
case 0x40: \
/* STR rd, [rn], -imm */ \
arm_access_memory(store, no_op, imm, u32, yes, - offset); \
break; \
\
case 0x41: \
/* LDR rd, [rn], -imm */ \
arm_access_memory(load, no_op, imm, u32, yes, - offset); \
break; \
\
case 0x42: \
/* STRT rd, [rn], -imm */ \
arm_access_memory(store, no_op, imm, u32, yes, - offset); \
break; \
\
case 0x43: \
/* LDRT rd, [rn], -imm */ \
arm_access_memory(load, no_op, imm, u32, yes, - offset); \
break; \
\
case 0x44: \
/* STRB rd, [rn], -imm */ \
arm_access_memory(store, no_op, imm, u8, yes, - offset); \
break; \
\
case 0x45: \
/* LDRB rd, [rn], -imm */ \
arm_access_memory(load, no_op, imm, u8, yes, - offset); \
break; \
\
case 0x46: \
/* STRBT rd, [rn], -imm */ \
arm_access_memory(store, no_op, imm, u8, yes, - offset); \
break; \
\
case 0x47: \
/* LDRBT rd, [rn], -imm */ \
arm_access_memory(load, no_op, imm, u8, yes, - offset); \
break; \
\
case 0x48: \
/* STR rd, [rn], +imm */ \
arm_access_memory(store, no_op, imm, u32, yes, + offset); \
break; \
\
case 0x49: \
/* LDR rd, [rn], +imm */ \
arm_access_memory(load, no_op, imm, u32, yes, + offset); \
break; \
\
case 0x4A: \
/* STRT rd, [rn], +imm */ \
arm_access_memory(store, no_op, imm, u32, yes, + offset); \
break; \
\
case 0x4B: \
/* LDRT rd, [rn], +imm */ \
arm_access_memory(load, no_op, imm, u32, yes, + offset); \
break; \
\
case 0x4C: \
/* STRB rd, [rn], +imm */ \
arm_access_memory(store, no_op, imm, u8, yes, + offset); \
break; \
\
case 0x4D: \
/* LDRB rd, [rn], +imm */ \
arm_access_memory(load, no_op, imm, u8, yes, + offset); \
break; \
\
case 0x4E: \
/* STRBT rd, [rn], +imm */ \
arm_access_memory(store, no_op, imm, u8, yes, + offset); \
break; \
\
case 0x4F: \
/* LDRBT rd, [rn], +imm */ \
arm_access_memory(load, no_op, imm, u8, yes, + offset); \
break; \
\
case 0x50: \
/* STR rd, [rn - imm] */ \
arm_access_memory(store, - offset, imm, u32, no, no_op); \
break; \
\
case 0x51: \
/* LDR rd, [rn - imm] */ \
arm_access_memory(load, - offset, imm, u32, no, no_op); \
break; \
\
case 0x52: \
/* STR rd, [rn - imm]! */ \
arm_access_memory(store, - offset, imm, u32, yes, no_op); \
break; \
\
case 0x53: \
/* LDR rd, [rn - imm]! */ \
arm_access_memory(load, - offset, imm, u32, yes, no_op); \
break; \
\
case 0x54: \
/* STRB rd, [rn - imm] */ \
arm_access_memory(store, - offset, imm, u8, no, no_op); \
break; \
\
case 0x55: \
/* LDRB rd, [rn - imm] */ \
arm_access_memory(load, - offset, imm, u8, no, no_op); \
break; \
\
case 0x56: \
/* STRB rd, [rn - imm]! */ \
arm_access_memory(store, - offset, imm, u8, yes, no_op); \
break; \
\
case 0x57: \
/* LDRB rd, [rn - imm]! */ \
arm_access_memory(load, - offset, imm, u8, yes, no_op); \
break; \
\
case 0x58: \
/* STR rd, [rn + imm] */ \
arm_access_memory(store, + offset, imm, u32, no, no_op); \
break; \
\
case 0x59: \
/* LDR rd, [rn + imm] */ \
arm_access_memory(load, + offset, imm, u32, no, no_op); \
break; \
\
case 0x5A: \
/* STR rd, [rn + imm]! */ \
arm_access_memory(store, + offset, imm, u32, yes, no_op); \
break; \
\
case 0x5B: \
/* LDR rd, [rn + imm]! */ \
arm_access_memory(load, + offset, imm, u32, yes, no_op); \
break; \
\
case 0x5C: \
/* STRB rd, [rn + imm] */ \
arm_access_memory(store, + offset, imm, u8, no, no_op); \
break; \
\
case 0x5D: \
/* LDRB rd, [rn + imm] */ \
arm_access_memory(load, + offset, imm, u8, no, no_op); \
break; \
\
case 0x5E: \
/* STRB rd, [rn + imm]! */ \
arm_access_memory(store, + offset, imm, u8, yes, no_op); \
break; \
\
case 0x5F: \
/* LDRBT rd, [rn + imm]! */ \
arm_access_memory(load, + offset, imm, u8, yes, no_op); \
break; \
\
case 0x60: \
/* STR rd, [rn], -reg_op */ \
arm_access_memory(store, no_op, reg, u32, yes, - reg_offset); \
break; \
\
case 0x61: \
/* LDR rd, [rn], -reg_op */ \
arm_access_memory(load, no_op, reg, u32, yes, - reg_offset); \
break; \
\
case 0x62: \
/* STRT rd, [rn], -reg_op */ \
arm_access_memory(store, no_op, reg, u32, yes, - reg_offset); \
break; \
\
case 0x63: \
/* LDRT rd, [rn], -reg_op */ \
arm_access_memory(load, no_op, reg, u32, yes, - reg_offset); \
break; \
\
case 0x64: \
/* STRB rd, [rn], -reg_op */ \
arm_access_memory(store, no_op, reg, u8, yes, - reg_offset); \
break; \
\
case 0x65: \
/* LDRB rd, [rn], -reg_op */ \
arm_access_memory(load, no_op, reg, u8, yes, - reg_offset); \
break; \
\
case 0x66: \
/* STRBT rd, [rn], -reg_op */ \
arm_access_memory(store, no_op, reg, u8, yes, - reg_offset); \
break; \
\
case 0x67: \
/* LDRBT rd, [rn], -reg_op */ \
arm_access_memory(load, no_op, reg, u8, yes, - reg_offset); \
break; \
\
case 0x68: \
/* STR rd, [rn], +reg_op */ \
arm_access_memory(store, no_op, reg, u32, yes, + reg_offset); \
break; \
\
case 0x69: \
/* LDR rd, [rn], +reg_op */ \
arm_access_memory(load, no_op, reg, u32, yes, + reg_offset); \
break; \
\
case 0x6A: \
/* STRT rd, [rn], +reg_op */ \
arm_access_memory(store, no_op, reg, u32, yes, + reg_offset); \
break; \
\
case 0x6B: \
/* LDRT rd, [rn], +reg_op */ \
arm_access_memory(load, no_op, reg, u32, yes, + reg_offset); \
break; \
\
case 0x6C: \
/* STRB rd, [rn], +reg_op */ \
arm_access_memory(store, no_op, reg, u8, yes, + reg_offset); \
break; \
\
case 0x6D: \
/* LDRB rd, [rn], +reg_op */ \
arm_access_memory(load, no_op, reg, u8, yes, + reg_offset); \
break; \
\
case 0x6E: \
/* STRBT rd, [rn], +reg_op */ \
arm_access_memory(store, no_op, reg, u8, yes, + reg_offset); \
break; \
\
case 0x6F: \
/* LDRBT rd, [rn], +reg_op */ \
arm_access_memory(load, no_op, reg, u8, yes, + reg_offset); \
break; \
\
case 0x70: \
/* STR rd, [rn - reg_op] */ \
arm_access_memory(store, - reg_offset, reg, u32, no, no_op); \
break; \
\
case 0x71: \
/* LDR rd, [rn - reg_op] */ \
arm_access_memory(load, - reg_offset, reg, u32, no, no_op); \
break; \
\
case 0x72: \
/* STR rd, [rn - reg_op]! */ \
arm_access_memory(store, - reg_offset, reg, u32, yes, no_op); \
break; \
\
case 0x73: \
/* LDR rd, [rn - reg_op]! */ \
arm_access_memory(load, - reg_offset, reg, u32, yes, no_op); \
break; \
\
case 0x74: \
/* STRB rd, [rn - reg_op] */ \
arm_access_memory(store, - reg_offset, reg, u8, no, no_op); \
break; \
\
case 0x75: \
/* LDRB rd, [rn - reg_op] */ \
arm_access_memory(load, - reg_offset, reg, u8, no, no_op); \
break; \
\
case 0x76: \
/* STRB rd, [rn - reg_op]! */ \
arm_access_memory(store, - reg_offset, reg, u8, yes, no_op); \
break; \
\
case 0x77: \
/* LDRB rd, [rn - reg_op]! */ \
arm_access_memory(load, - reg_offset, reg, u8, yes, no_op); \
break; \
\
case 0x78: \
/* STR rd, [rn + reg_op] */ \
arm_access_memory(store, + reg_offset, reg, u32, no, no_op); \
break; \
\
case 0x79: \
/* LDR rd, [rn + reg_op] */ \
arm_access_memory(load, + reg_offset, reg, u32, no, no_op); \
break; \
\
case 0x7A: \
/* STR rd, [rn + reg_op]! */ \
arm_access_memory(store, + reg_offset, reg, u32, yes, no_op); \
break; \
\
case 0x7B: \
/* LDR rd, [rn + reg_op]! */ \
arm_access_memory(load, + reg_offset, reg, u32, yes, no_op); \
break; \
\
case 0x7C: \
/* STRB rd, [rn + reg_op] */ \
arm_access_memory(store, + reg_offset, reg, u8, no, no_op); \
break; \
\
case 0x7D: \
/* LDRB rd, [rn + reg_op] */ \
arm_access_memory(load, + reg_offset, reg, u8, no, no_op); \
break; \
\
case 0x7E: \
/* STRB rd, [rn + reg_op]! */ \
arm_access_memory(store, + reg_offset, reg, u8, yes, no_op); \
break; \
\
case 0x7F: \
/* LDRBT rd, [rn + reg_op]! */ \
arm_access_memory(load, + reg_offset, reg, u8, yes, no_op); \
break; \
\
case 0x80: \
/* STMDA rn, rlist */ \
arm_block_memory(store, down_a, no, no); \
break; \
\
case 0x81: \
/* LDMDA rn, rlist */ \
arm_block_memory(load, down_a, no, no); \
break; \
\
case 0x82: \
/* STMDA rn!, rlist */ \
arm_block_memory(store, down_a, down, no); \
break; \
\
case 0x83: \
/* LDMDA rn!, rlist */ \
arm_block_memory(load, down_a, down, no); \
break; \
\
case 0x84: \
/* STMDA rn, rlist^ */ \
arm_block_memory(store, down_a, no, yes); \
break; \
\
case 0x85: \
/* LDMDA rn, rlist^ */ \
arm_block_memory(load, down_a, no, yes); \
break; \
\
case 0x86: \
/* STMDA rn!, rlist^ */ \
arm_block_memory(store, down_a, down, yes); \
break; \
\
case 0x87: \
/* LDMDA rn!, rlist^ */ \
arm_block_memory(load, down_a, down, yes); \
break; \
\
case 0x88: \
/* STMIA rn, rlist */ \
arm_block_memory(store, no, no, no); \
break; \
\
case 0x89: \
/* LDMIA rn, rlist */ \
arm_block_memory(load, no, no, no); \
break; \
\
case 0x8A: \
/* STMIA rn!, rlist */ \
arm_block_memory(store, no, up, no); \
break; \
\
case 0x8B: \
/* LDMIA rn!, rlist */ \
arm_block_memory(load, no, up, no); \
break; \
\
case 0x8C: \
/* STMIA rn, rlist^ */ \
arm_block_memory(store, no, no, yes); \
break; \
\
case 0x8D: \
/* LDMIA rn, rlist^ */ \
arm_block_memory(load, no, no, yes); \
break; \
\
case 0x8E: \
/* STMIA rn!, rlist^ */ \
arm_block_memory(store, no, up, yes); \
break; \
\
case 0x8F: \
/* LDMIA rn!, rlist^ */ \
arm_block_memory(load, no, up, yes); \
break; \
\
case 0x90: \
/* STMDB rn, rlist */ \
arm_block_memory(store, down_b, no, no); \
break; \
\
case 0x91: \
/* LDMDB rn, rlist */ \
arm_block_memory(load, down_b, no, no); \
break; \
\
case 0x92: \
/* STMDB rn!, rlist */ \
arm_block_memory(store, down_b, down, no); \
break; \
\
case 0x93: \
/* LDMDB rn!, rlist */ \
arm_block_memory(load, down_b, down, no); \
break; \
\
case 0x94: \
/* STMDB rn, rlist^ */ \
arm_block_memory(store, down_b, no, yes); \
break; \
\
case 0x95: \
/* LDMDB rn, rlist^ */ \
arm_block_memory(load, down_b, no, yes); \
break; \
\
case 0x96: \
/* STMDB rn!, rlist^ */ \
arm_block_memory(store, down_b, down, yes); \
break; \
\
case 0x97: \
/* LDMDB rn!, rlist^ */ \
arm_block_memory(load, down_b, down, yes); \
break; \
\
case 0x98: \
/* STMIB rn, rlist */ \
arm_block_memory(store, up, no, no); \
break; \
\
case 0x99: \
/* LDMIB rn, rlist */ \
arm_block_memory(load, up, no, no); \
break; \
\
case 0x9A: \
/* STMIB rn!, rlist */ \
arm_block_memory(store, up, up, no); \
break; \
\
case 0x9B: \
/* LDMIB rn!, rlist */ \
arm_block_memory(load, up, up, no); \
break; \
\
case 0x9C: \
/* STMIB rn, rlist^ */ \
arm_block_memory(store, up, no, yes); \
break; \
\
case 0x9D: \
/* LDMIB rn, rlist^ */ \
arm_block_memory(load, up, no, yes); \
break; \
\
case 0x9E: \
/* STMIB rn!, rlist^ */ \
arm_block_memory(store, up, up, yes); \
break; \
\
case 0x9F: \
/* LDMIB rn!, rlist^ */ \
arm_block_memory(load, up, up, yes); \
break; \
\
case 0xA0: \
case 0xA1: \
case 0xA2: \
case 0xA3: \
case 0xA4: \
case 0xA5: \
case 0xA6: \
case 0xA7: \
case 0xA8: \
case 0xA9: \
case 0xAA: \
case 0xAB: \
case 0xAC: \
case 0xAD: \
case 0xAE: \
case 0xAF: \
{ \
/* B offset */ \
arm_decode_branch(); \
arm_pc_offset_update(offset + 8); \
break; \
} \
\
case 0xB0 ... 0xBF: \
{ \
/* BL offset */ \
arm_decode_branch(); \
reg[REG_LR] = pc + 4; \
arm_pc_offset_update(offset + 8); \
break; \
} \
\
case 0xC0 ... 0xEF: \
/* coprocessor instructions, reserved on GBA */ \
break; \
\
case 0xF0 ... 0xFF: \
{ \
/* SWI comment */ \
u32 swi_comment = opcode & 0x00FFFFFF; \
\
switch(swi_comment >> 16) \
{ \
/* Jump to BIOS SWI handler */ \
default: \
reg_mode[MODE_SUPERVISOR][6] = pc + 4; \
collapse_flags(); \
spsr[MODE_SUPERVISOR] = reg[REG_CPSR]; \
reg[REG_PC] = 0x00000008; \
arm_update_pc(); \
reg[REG_CPSR] = (reg[REG_CPSR] & ~0x1F) | 0x13; \
set_cpu_mode(MODE_SUPERVISOR); \
break; \
} \
break; \
} \
} \
\
skip_instruction: \
#define execute_thumb_instruction() \
using_instruction(thumb); \
check_pc_region(); \
pc &= ~0x01; \
opcode = address16(pc_address_block, (pc & 0x7FFF)); \
\
switch((opcode >> 8) & 0xFF) \
{ \
case 0x00 ... 0x07: \
/* LSL rd, rs, offset */ \
thumb_shift(shift, lsl, imm); \
break; \
\
case 0x08 ... 0x0F: \
/* LSR rd, rs, offset */ \
thumb_shift(shift, lsr, imm); \
break; \
\
case 0x10 ... 0x17: \
/* ASR rd, rs, offset */ \
thumb_shift(shift, asr, imm); \
break; \
\
case 0x18 ... 0x19: \
/* ADD rd, rs, rn */ \
thumb_add(add_sub, rd, reg[rs], reg[rn]); \
break; \
\
case 0x1A ... 0x1B: \
/* SUB rd, rs, rn */ \
thumb_sub(add_sub, rd, reg[rs], reg[rn]); \
break; \
\
case 0x1C ... 0x1D: \
/* ADD rd, rs, imm */ \
thumb_add(add_sub_imm, rd, reg[rs], imm); \
break; \
\
case 0x1E ... 0x1F: \
/* SUB rd, rs, imm */ \
thumb_sub(add_sub_imm, rd, reg[rs], imm); \
break; \
\
case 0x20: \
/* MOV r0, imm */ \
thumb_logic(imm, 0, imm); \
break; \
\
case 0x21: \
/* MOV r1, imm */ \
thumb_logic(imm, 1, imm); \
break; \
\
case 0x22: \
/* MOV r2, imm */ \
thumb_logic(imm, 2, imm); \
break; \
\
case 0x23: \
/* MOV r3, imm */ \
thumb_logic(imm, 3, imm); \
break; \
\
case 0x24: \
/* MOV r4, imm */ \
thumb_logic(imm, 4, imm); \
break; \
\
case 0x25: \
/* MOV r5, imm */ \
thumb_logic(imm, 5, imm); \
break; \
\
case 0x26: \
/* MOV r6, imm */ \
thumb_logic(imm, 6, imm); \
break; \
\
case 0x27: \
/* MOV r7, imm */ \
thumb_logic(imm, 7, imm); \
break; \
\
case 0x28: \
/* CMP r0, imm */ \
thumb_test_sub(imm, reg[0], imm); \
break; \
\
case 0x29: \
/* CMP r1, imm */ \
thumb_test_sub(imm, reg[1], imm); \
break; \
\
case 0x2A: \
/* CMP r2, imm */ \
thumb_test_sub(imm, reg[2], imm); \
break; \
\
case 0x2B: \
/* CMP r3, imm */ \
thumb_test_sub(imm, reg[3], imm); \
break; \
\
case 0x2C: \
/* CMP r4, imm */ \
thumb_test_sub(imm, reg[4], imm); \
break; \
\
case 0x2D: \
/* CMP r5, imm */ \
thumb_test_sub(imm, reg[5], imm); \
break; \
\
case 0x2E: \
/* CMP r6, imm */ \
thumb_test_sub(imm, reg[6], imm); \
break; \
\
case 0x2F: \
/* CMP r7, imm */ \
thumb_test_sub(imm, reg[7], imm); \
break; \
\
case 0x30: \
/* ADD r0, imm */ \
thumb_add(imm, 0, reg[0], imm); \
break; \
\
case 0x31: \
/* ADD r1, imm */ \
thumb_add(imm, 1, reg[1], imm); \
break; \
\
case 0x32: \
/* ADD r2, imm */ \
thumb_add(imm, 2, reg[2], imm); \
break; \
\
case 0x33: \
/* ADD r3, imm */ \
thumb_add(imm, 3, reg[3], imm); \
break; \
\
case 0x34: \
/* ADD r4, imm */ \
thumb_add(imm, 4, reg[4], imm); \
break; \
\
case 0x35: \
/* ADD r5, imm */ \
thumb_add(imm, 5, reg[5], imm); \
break; \
\
case 0x36: \
/* ADD r6, imm */ \
thumb_add(imm, 6, reg[6], imm); \
break; \
\
case 0x37: \
/* ADD r7, imm */ \
thumb_add(imm, 7, reg[7], imm); \
break; \
\
case 0x38: \
/* SUB r0, imm */ \
thumb_sub(imm, 0, reg[0], imm); \
break; \
\
case 0x39: \
/* SUB r1, imm */ \
thumb_sub(imm, 1, reg[1], imm); \
break; \
\
case 0x3A: \
/* SUB r2, imm */ \
thumb_sub(imm, 2, reg[2], imm); \
break; \
\
case 0x3B: \
/* SUB r3, imm */ \
thumb_sub(imm, 3, reg[3], imm); \
break; \
\
case 0x3C: \
/* SUB r4, imm */ \
thumb_sub(imm, 4, reg[4], imm); \
break; \
\
case 0x3D: \
/* SUB r5, imm */ \
thumb_sub(imm, 5, reg[5], imm); \
break; \
\
case 0x3E: \
/* SUB r6, imm */ \
thumb_sub(imm, 6, reg[6], imm); \
break; \
\
case 0x3F: \
/* SUB r7, imm */ \
thumb_sub(imm, 7, reg[7], imm); \
break; \
\
case 0x40: \
switch((opcode >> 6) & 0x03) \
{ \
case 0x00: \
/* AND rd, rs */ \
thumb_logic(alu_op, rd, reg[rd] & reg[rs]); \
break; \
\
case 0x01: \
/* EOR rd, rs */ \
thumb_logic(alu_op, rd, reg[rd] ^ reg[rs]); \
break; \
\
case 0x02: \
/* LSL rd, rs */ \
thumb_shift(alu_op, lsl, reg); \
break; \
\
case 0x03: \
/* LSR rd, rs */ \
thumb_shift(alu_op, lsr, reg); \
break; \
} \
break; \
\
case 0x41: \
switch((opcode >> 6) & 0x03) \
{ \
case 0x00: \
/* ASR rd, rs */ \
thumb_shift(alu_op, asr, reg); \
break; \
\
case 0x01: \
/* ADC rd, rs */ \
thumb_add(alu_op, rd, reg[rd] + reg[rs], c_flag); \
break; \
\
case 0x02: \
/* SBC rd, rs */ \
thumb_sub(alu_op, rd, reg[rd] - reg[rs], (c_flag ^ 1)); \
break; \
\
case 0x03: \
/* ROR rd, rs */ \
thumb_shift(alu_op, ror, reg); \
break; \
} \
break; \
\
case 0x42: \
switch((opcode >> 6) & 0x03) \
{ \
case 0x00: \
/* TST rd, rs */ \
thumb_test_logic(alu_op, reg[rd] & reg[rs]); \
break; \
\
case 0x01: \
/* NEG rd, rs */ \
thumb_sub(alu_op, rd, 0, reg[rs]); \
break; \
\
case 0x02: \
/* CMP rd, rs */ \
thumb_test_sub(alu_op, reg[rd], reg[rs]); \
break; \
\
case 0x03: \
/* CMN rd, rs */ \
thumb_test_add(alu_op, reg[rd], reg[rs]); \
break; \
} \
break; \
\
case 0x43: \
switch((opcode >> 6) & 0x03) \
{ \
case 0x00: \
/* ORR rd, rs */ \
thumb_logic(alu_op, rd, reg[rd] | reg[rs]); \
break; \
\
case 0x01: \
/* MUL rd, rs */ \
thumb_logic(alu_op, rd, reg[rd] * reg[rs]); \
break; \
\
case 0x02: \
/* BIC rd, rs */ \
thumb_logic(alu_op, rd, reg[rd] & (~reg[rs])); \
break; \
\
case 0x03: \
/* MVN rd, rs */ \
thumb_logic(alu_op, rd, ~reg[rs]); \
break; \
} \
break; \
\
case 0x44: \
/* ADD rd, rs */ \
thumb_hireg_op(reg[rd] + reg[rs]); \
break; \
\
case 0x45: \
/* CMP rd, rs */ \
{ \
thumb_pc_offset(4); \
thumb_decode_hireg_op(); \
u32 _sa = reg[rd]; \
u32 _sb = reg[rs]; \
u32 dest = _sa - _sb; \
thumb_pc_offset(-2); \
calculate_flags_sub(dest, _sa, _sb); \
} \
break; \
\
case 0x46: \
/* MOV rd, rs */ \
thumb_hireg_op(reg[rs]); \
break; \
\
case 0x47: \
/* BX rs */ \
{ \
thumb_decode_hireg_op(); \
u32 src; \
thumb_pc_offset(4); \
src = reg[rs]; \
if(src & 0x01) \
{ \
src -= 1; \
thumb_pc_offset_update_direct(src); \
} \
else \
{ \
/* Switch to ARM mode */ \
thumb_pc_offset_update_direct(src); \
reg[REG_CPSR] &= ~0x20; \
collapse_flags(); \
goto arm_loop; \
} \
} \
break; \
\
case 0x48: \
/* LDR r0, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[0], u32); \
break; \
\
case 0x49: \
/* LDR r1, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[1], u32); \
break; \
\
case 0x4A: \
/* LDR r2, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[2], u32); \
break; \
\
case 0x4B: \
/* LDR r3, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[3], u32); \
break; \
\
case 0x4C: \
/* LDR r4, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[4], u32); \
break; \
\
case 0x4D: \
/* LDR r5, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[5], u32); \
break; \
\
case 0x4E: \
/* LDR r6, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[6], u32); \
break; \
\
case 0x4F: \
/* LDR r7, [pc + imm] */ \
thumb_access_memory(load, imm, (pc & ~2) + (imm * 4) + 4, reg[7], u32); \
break; \
\
case 0x50 ... 0x51: \
/* STR rd, [rb + ro] */ \
thumb_access_memory(store, mem_reg, reg[rb] + reg[ro], reg[rd], u32); \
break; \
\
case 0x52 ... 0x53: \
/* STRH rd, [rb + ro] */ \
thumb_access_memory(store, mem_reg, reg[rb] + reg[ro], reg[rd], u16); \
break; \
\
case 0x54 ... 0x55: \
/* STRB rd, [rb + ro] */ \
thumb_access_memory(store, mem_reg, reg[rb] + reg[ro], reg[rd], u8); \
break; \
\
case 0x56 ... 0x57: \
/* LDSB rd, [rb + ro] */ \
thumb_access_memory(load, mem_reg, reg[rb] + reg[ro], reg[rd], s8); \
break; \
\
case 0x58 ... 0x59: \
/* LDR rd, [rb + ro] */ \
thumb_access_memory(load, mem_reg, reg[rb] + reg[ro], reg[rd], u32); \
break; \
\
case 0x5A ... 0x5B: \
/* LDRH rd, [rb + ro] */ \
thumb_access_memory(load, mem_reg, reg[rb] + reg[ro], reg[rd], u16); \
break; \
\
case 0x5C ... 0x5D: \
/* LDRB rd, [rb + ro] */ \
thumb_access_memory(load, mem_reg, reg[rb] + reg[ro], reg[rd], u8); \
break; \
\
case 0x5E ... 0x5F: \
/* LDSH rd, [rb + ro] */ \
thumb_access_memory(load, mem_reg, reg[rb] + reg[ro], reg[rd], s16); \
break; \
\
case 0x60 ... 0x67: \
/* STR rd, [rb + imm] */ \
thumb_access_memory(store, mem_imm, reg[rb] + (imm * 4), reg[rd], u32); \
break; \
\
case 0x68 ... 0x6F: \
/* LDR rd, [rb + imm] */ \
thumb_access_memory(load, mem_imm, reg[rb] + (imm * 4), reg[rd], u32); \
break; \
\
case 0x70 ... 0x77: \
/* STRB rd, [rb + imm] */ \
thumb_access_memory(store, mem_imm, reg[rb] + imm, reg[rd], u8); \
break; \
\
case 0x78 ... 0x7F: \
/* LDRB rd, [rb + imm] */ \
thumb_access_memory(load, mem_imm, reg[rb] + imm, reg[rd], u8); \
break; \
\
case 0x80 ... 0x87: \
/* STRH rd, [rb + imm] */ \
thumb_access_memory(store, mem_imm, reg[rb] + (imm * 2), reg[rd], u16); \
break; \
\
case 0x88 ... 0x8F: \
/* LDRH rd, [rb + imm] */ \
thumb_access_memory(load, mem_imm, reg[rb] + (imm * 2), reg[rd], u16); \
break; \
\
case 0x90: \
/* STR r0, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[0], u32); \
break; \
\
case 0x91: \
/* STR r1, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[1], u32); \
break; \
\
case 0x92: \
/* STR r2, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[2], u32); \
break; \
\
case 0x93: \
/* STR r3, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[3], u32); \
break; \
\
case 0x94: \
/* STR r4, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[4], u32); \
break; \
\
case 0x95: \
/* STR r5, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[5], u32); \
break; \
\
case 0x96: \
/* STR r6, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[6], u32); \
break; \
\
case 0x97: \
/* STR r7, [sp + imm] */ \
thumb_access_memory(store, imm, reg[REG_SP] + (imm * 4), reg[7], u32); \
break; \
\
case 0x98: \
/* LDR r0, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[0], u32); \
break; \
\
case 0x99: \
/* LDR r1, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[1], u32); \
break; \
\
case 0x9A: \
/* LDR r2, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[2], u32); \
break; \
\
case 0x9B: \
/* LDR r3, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[3], u32); \
break; \
\
case 0x9C: \
/* LDR r4, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[4], u32); \
break; \
\
case 0x9D: \
/* LDR r5, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[5], u32); \
break; \
\
case 0x9E: \
/* LDR r6, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[6], u32); \
break; \
\
case 0x9F: \
/* LDR r7, [sp + imm] */ \
thumb_access_memory(load, imm, reg[REG_SP] + (imm * 4), reg[7], u32); \
break; \
\
case 0xA0: \
/* ADD r0, pc, +imm */ \
thumb_add_noflags(imm, 0, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA1: \
/* ADD r1, pc, +imm */ \
thumb_add_noflags(imm, 1, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA2: \
/* ADD r2, pc, +imm */ \
thumb_add_noflags(imm, 2, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA3: \
/* ADD r3, pc, +imm */ \
thumb_add_noflags(imm, 3, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA4: \
/* ADD r4, pc, +imm */ \
thumb_add_noflags(imm, 4, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA5: \
/* ADD r5, pc, +imm */ \
thumb_add_noflags(imm, 5, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA6: \
/* ADD r6, pc, +imm */ \
thumb_add_noflags(imm, 6, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA7: \
/* ADD r7, pc, +imm */ \
thumb_add_noflags(imm, 7, (pc & ~2) + 4, (imm * 4)); \
break; \
\
case 0xA8: \
/* ADD r0, sp, +imm */ \
thumb_add_noflags(imm, 0, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xA9: \
/* ADD r1, sp, +imm */ \
thumb_add_noflags(imm, 1, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xAA: \
/* ADD r2, sp, +imm */ \
thumb_add_noflags(imm, 2, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xAB: \
/* ADD r3, sp, +imm */ \
thumb_add_noflags(imm, 3, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xAC: \
/* ADD r4, sp, +imm */ \
thumb_add_noflags(imm, 4, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xAD: \
/* ADD r5, sp, +imm */ \
thumb_add_noflags(imm, 5, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xAE: \
/* ADD r6, sp, +imm */ \
thumb_add_noflags(imm, 6, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xAF: \
/* ADD r7, sp, +imm */ \
thumb_add_noflags(imm, 7, reg[REG_SP], (imm * 4)); \
break; \
\
case 0xB0 ... 0xB3: \
if((opcode >> 7) & 0x01) \
{ \
/* ADD sp, -imm */ \
thumb_add_noflags(add_sp, 13, reg[REG_SP], -(imm * 4)); \
} \
else \
{ \
/* ADD sp, +imm */ \
thumb_add_noflags(add_sp, 13, reg[REG_SP], (imm * 4)); \
} \
break; \
\
case 0xB4: \
/* PUSH rlist */ \
thumb_block_memory(store, down, no_op, 13); \
break; \
\
case 0xB5: \
/* PUSH rlist, lr */ \
thumb_block_memory(store, push_lr, push_lr, 13); \
break; \
\
case 0xBC: \
/* POP rlist */ \
thumb_block_memory(load, no_op, up, 13); \
break; \
\
case 0xBD: \
/* POP rlist, pc */ \
thumb_block_memory(load, no_op, pop_pc, 13); \
break; \
\
case 0xC0: \
/* STMIA r0!, rlist */ \
thumb_block_memory(store, no_op, up, 0); \
break; \
\
case 0xC1: \
/* STMIA r1!, rlist */ \
thumb_block_memory(store, no_op, up, 1); \
break; \
\
case 0xC2: \
/* STMIA r2!, rlist */ \
thumb_block_memory(store, no_op, up, 2); \
break; \
\
case 0xC3: \
/* STMIA r3!, rlist */ \
thumb_block_memory(store, no_op, up, 3); \
break; \
\
case 0xC4: \
/* STMIA r4!, rlist */ \
thumb_block_memory(store, no_op, up, 4); \
break; \
\
case 0xC5: \
/* STMIA r5!, rlist */ \
thumb_block_memory(store, no_op, up, 5); \
break; \
\
case 0xC6: \
/* STMIA r6!, rlist */ \
thumb_block_memory(store, no_op, up, 6); \
break; \
\
case 0xC7: \
/* STMIA r7!, rlist */ \
thumb_block_memory(store, no_op, up, 7); \
break; \
\
case 0xC8: \
/* LDMIA r0!, rlist */ \
thumb_block_memory(load, no_op, up, 0); \
break; \
\
case 0xC9: \
/* LDMIA r1!, rlist */ \
thumb_block_memory(load, no_op, up, 1); \
break; \
\
case 0xCA: \
/* LDMIA r2!, rlist */ \
thumb_block_memory(load, no_op, up, 2); \
break; \
\
case 0xCB: \
/* LDMIA r3!, rlist */ \
thumb_block_memory(load, no_op, up, 3); \
break; \
\
case 0xCC: \
/* LDMIA r4!, rlist */ \
thumb_block_memory(load, no_op, up, 4); \
break; \
\
case 0xCD: \
/* LDMIA r5!, rlist */ \
thumb_block_memory(load, no_op, up, 5); \
break; \
\
case 0xCE: \
/* LDMIA r6!, rlist */ \
thumb_block_memory(load, no_op, up, 6); \
break; \
\
case 0xCF: \
/* LDMIA r7!, rlist */ \
thumb_block_memory(load, no_op, up, 7); \
break; \
\
case 0xD0: \
/* BEQ label */ \
thumb_conditional_branch(z_flag == 1); \
break; \
\
case 0xD1: \
/* BNE label */ \
thumb_conditional_branch(z_flag == 0); \
break; \
\
case 0xD2: \
/* BCS label */ \
thumb_conditional_branch(c_flag == 1); \
break; \
\
case 0xD3: \
/* BCC label */ \
thumb_conditional_branch(c_flag == 0); \
break; \
\
case 0xD4: \
/* BMI label */ \
thumb_conditional_branch(n_flag == 1); \
break; \
\
case 0xD5: \
/* BPL label */ \
thumb_conditional_branch(n_flag == 0); \
break; \
\
case 0xD6: \
/* BVS label */ \
thumb_conditional_branch(v_flag == 1); \
break; \
\
case 0xD7: \
/* BVC label */ \
thumb_conditional_branch(v_flag == 0); \
break; \
\
case 0xD8: \
/* BHI label */ \
thumb_conditional_branch(c_flag & (z_flag ^ 1)); \
break; \
\
case 0xD9: \
/* BLS label */ \
thumb_conditional_branch((c_flag == 0) | z_flag); \
break; \
\
case 0xDA: \
/* BGE label */ \
thumb_conditional_branch(n_flag == v_flag); \
break; \
\
case 0xDB: \
/* BLT label */ \
thumb_conditional_branch(n_flag != v_flag); \
break; \
\
case 0xDC: \
/* BGT label */ \
thumb_conditional_branch((z_flag == 0) & (n_flag == v_flag)); \
break; \
\
case 0xDD: \
/* BLE label */ \
thumb_conditional_branch(z_flag | (n_flag != v_flag)); \
break; \
\
case 0xDF: \
{ \
/* SWI comment */ \
u32 swi_comment = opcode & 0xFF; \
\
switch(swi_comment) \
{ \
default: \
reg_mode[MODE_SUPERVISOR][6] = pc + 2; \
spsr[MODE_SUPERVISOR] = reg[REG_CPSR]; \
reg[REG_PC] = 0x00000008; \
thumb_update_pc(); \
reg[REG_CPSR] = (reg[REG_CPSR] & ~0x3F) | 0x13; \
set_cpu_mode(MODE_SUPERVISOR); \
collapse_flags(); \
goto arm_loop; \
} \
break; \
} \
\
case 0xE0 ... 0xE7: \
{ \
/* B label */ \
thumb_decode_branch(); \
thumb_pc_offset_update(((s32)(offset << 21) >> 20) + 4); \
break; \
} \
\
case 0xF0 ... 0xF7: \
{ \
/* (low word) BL label */ \
thumb_decode_branch(); \
reg[REG_LR] = pc + 4 + ((s32)(offset << 21) >> 9); \
thumb_pc_offset(2); \
break; \
} \
\
case 0xF8 ... 0xFF: \
{ \
/* (high word) BL label */ \
thumb_decode_branch(); \
u32 lr = (pc + 2) | 0x01; \
pc = reg[REG_LR] + (offset * 2); \
reg[REG_LR] = lr; \
reg[REG_PC] = pc; \
break; \
} \
} \
void print_arm_registers()
{
u32 i, i2, i3;
for(i = 0, i3 = 0; i < 4; i++)
{
debug_screen_printf(" ");
for(i2 = 0; i2 < 4; i2++, i3++)
{
debug_screen_printf("R%02d %08x ", i3, reg[i3]);
}
debug_screen_newline(1);
}
}
void print_thumb_instruction()
{
debug_screen_printf("Thumb instruction at PC: %04x",
read_memory16(reg[REG_PC]));
debug_screen_newline(1);
}
void print_arm_instruction()
{
debug_screen_printf("ARM instruction at PC: %08x",
read_memory32(reg[REG_PC]));
debug_screen_newline(1);
}
void print_flags()
{
u32 cpsr = reg[REG_CPSR];
debug_screen_newline(1);
debug_screen_printf(
" N: %d Z: %d C: %d V: %d CPSR: %08x SPSR: %08x mode: %s",
(cpsr >> 31) & 0x01, (cpsr >> 30) & 0x01, (cpsr >> 29) & 0x01,
(cpsr >> 28) & 0x01, cpsr, spsr[reg[CPU_MODE]],
cpu_mode_names[reg[CPU_MODE]]);
debug_screen_newline(2);
}
const u32 stack_print_lines = 2;
void print_stack()
{
u32 i, i2, i3;
debug_screen_printf("Stack:");
debug_screen_newline(1);
for(i = 0, i3 = reg[REG_SP]; i < stack_print_lines; i++)
{
for(i2 = 0; i2 < 5; i2++, i3 += 4)
{
debug_screen_printf(" %08x", read_memory32(i3));
}
if(i != stack_print_lines)
debug_screen_newline(1);
}
debug_screen_newline(1);
}
u32 instruction_count = 0;
u32 output_field = 0;
const u32 num_output_fields = 2;
u32 last_instruction = 0;
u32 in_interrupt = 0;
u32 debug_on()
{
current_debug_state = STEP;
debug_screen_start();
}
u32 debug_off(debug_state new_debug_state)
{
current_debug_state = new_debug_state;
debug_screen_end();
}
u32 function_cc step_debug(u32 pc, u32 cycles)
{
u32 thumb = 0;
reg[REG_PC] = pc;
if(reg[REG_CPSR] & 0x20)
thumb = 1;
instruction_count++;
switch(current_debug_state)
{
case PC_BREAKPOINT:
if(reg[REG_PC] == breakpoint_value)
debug_on();
break;
case Z_BREAKPOINT:
if(reg[REG_Z_FLAG] == 1)
debug_on();
break;
case VCOUNT_BREAKPOINT:
if(io_registers[REG_VCOUNT] == breakpoint_value)
debug_on();
break;
case COUNTDOWN_BREAKPOINT:
if(breakpoint_value == 0)
debug_on();
else
breakpoint_value--;
break;
case COUNTDOWN_BREAKPOINT_B:
if(breakpoint_value == instruction_count)
debug_on();
break;
case COUNTDOWN_BREAKPOINT_C:
{
if(pc == 0x18)
in_interrupt++;
if((breakpoint_value == 0) && (in_interrupt == 0))
{
debug_on();
}
else
if(in_interrupt == 0)
breakpoint_value--;
if(in_interrupt && (pc == 0x13c))
in_interrupt--;
break;
}
}
if((current_debug_state == STEP) ||
(current_debug_state == STEP_RUN))
{
u32 key = 0;
SDL_LockMutex(sound_mutex);
SDL_PauseAudio(1);
if(output_field >= num_output_fields)
{
output_field = 0;
debug_screen_clear();
}
if(thumb)
print_thumb_instruction(cycles);
else
print_arm_instruction(cycles);
print_arm_registers();
print_flags();
print_stack();
printf("%x instructions in, VCOUNT %d, cycles remaining: %d \n",
instruction_count, io_registers[REG_VCOUNT], cycles);
debug_screen_update();
output_field++;
if(current_debug_state != STEP_RUN)
{
#ifdef STDIO_DEBUG
key = getchar();
#else
gui_action_type next_input = CURSOR_NONE;
while(next_input == CURSOR_NONE)
{
next_input = get_gui_input();
switch(next_input)
{
case CURSOR_BACK:
key = 'b';
break;
case CURSOR_UP:
key = 'r';
break;
case CURSOR_EXIT:
key = 'q';
break;
default:
key = 'n';
break;
}
}
#endif
}
switch(key)
{
case 'd':
dump_translation_cache();
break;
case 'z':
debug_off(Z_BREAKPOINT);
break;
#ifdef STDIO_DEBUG
case 'x':
printf("break at PC (hex): ");
scanf("%08x", &breakpoint_value);
debug_off(PC_BREAKPOINT);
break;
case 'c':
printf("break after N instructions (hex): ");
scanf("%08x", &breakpoint_value);
breakpoint_value -= 1;
debug_off(COUNTDOWN_BREAKPOINT);
break;
case 'f':
printf("break after N instructions, skip in IRQ (hex): ");
scanf("%08x", &breakpoint_value);
breakpoint_value -= 1;
debug_off(COUNTDOWN_BREAKPOINT_C);
break;
case 'g':
printf("break after N instructions (since start): ");
scanf("%d", &breakpoint_value);
debug_off(COUNTDOWN_BREAKPOINT_B);
break;
case 'v':
printf("break at VCOUNT: ");
scanf("%d", &breakpoint_value);
debug_off(VCOUNT_BREAKPOINT);
break;
#endif
case 's':
current_debug_state = STEP_RUN;
break;
case 'r':
debug_off(RUN);
break;
case 'b':
debug_off(PC_BREAKPOINT);
break;
case 't':
global_cycles_per_instruction = 0;
debug_off(RUN);
break;
case 'a':
{
u8 current_savestate_filename[512];
u16 *current_screen = copy_screen();
get_savestate_filename_noshot(savestate_slot,
current_savestate_filename);
save_state(current_savestate_filename, current_screen);
free(current_screen);
break;
}
case 'q':
quit();
}
SDL_PauseAudio(0);
SDL_UnlockMutex(sound_mutex);
}
last_instruction = reg[REG_PC];
if(thumb)
reg[REG_PC] = pc + 2;
else
reg[REG_PC] = pc + 4;
return 0;
}
void set_cpu_mode(cpu_mode_type new_mode)
{
u32 i;
cpu_mode_type cpu_mode = reg[CPU_MODE];
if(cpu_mode != new_mode)
{
if(new_mode == MODE_FIQ)
{
for(i = 8; i < 15; i++)
{
reg_mode[cpu_mode][i - 8] = reg[i];
}
}
else
{
reg_mode[cpu_mode][5] = reg[REG_SP];
reg_mode[cpu_mode][6] = reg[REG_LR];
}
if(cpu_mode == MODE_FIQ)
{
for(i = 8; i < 15; i++)
{
reg[i] = reg_mode[new_mode][i - 8];
}
}
else
{
reg[REG_SP] = reg_mode[new_mode][5];
reg[REG_LR] = reg_mode[new_mode][6];
}
reg[CPU_MODE] = new_mode;
}
}
void raise_interrupt(irq_type irq_raised)
{
// The specific IRQ must be enabled in IE, master IRQ enable must be on,
// and it must be on in the flags.
io_registers[REG_IF] |= irq_raised;
if((io_registers[REG_IE] & irq_raised) && io_registers[REG_IME] &&
((reg[REG_CPSR] & 0x80) == 0))
{
bios_read_protect = 0xe55ec002;
// Interrupt handler in BIOS
reg_mode[MODE_IRQ][6] = reg[REG_PC] + 4;
spsr[MODE_IRQ] = reg[REG_CPSR];
reg[REG_CPSR] = 0xD2;
reg[REG_PC] = 0x00000018;
bios_region_read_allow();
set_cpu_mode(MODE_IRQ);
reg[CPU_HALT_STATE] = CPU_ACTIVE;
reg[CHANGED_PC_STATUS] = 1;
}
}
u32 execute_arm(u32 cycles)
{
u32 pc = reg[REG_PC];
u32 opcode;
u32 condition;
u32 n_flag, z_flag, c_flag, v_flag;
u32 pc_region = (pc >> 15);
u8 *pc_address_block = memory_map_read[pc_region];
u32 new_pc_region;
s32 cycles_remaining;
u32 cycles_per_instruction = global_cycles_per_instruction;
cpu_alert_type cpu_alert;
u32 old_pc;
if(pc_address_block == NULL)
pc_address_block = load_gamepak_page(pc_region & 0x3FF);
while(1)
{
cycles_remaining = cycles;
pc = reg[REG_PC];
extract_flags();
if(reg[REG_CPSR] & 0x20)
goto thumb_loop;
do
{
arm_loop:
collapse_flags();
step_debug(pc, cycles_remaining);
cycles_per_instruction = global_cycles_per_instruction;
old_pc = pc;
execute_arm_instruction();
cycles_remaining -= cycles_per_instruction;
} while(cycles_remaining > 0);
collapse_flags();
cycles = update_gba();
continue;
do
{
thumb_loop:
collapse_flags();
step_debug(pc, cycles_remaining);
old_pc = pc;
execute_thumb_instruction();
cycles_remaining -= cycles_per_instruction;
} while(cycles_remaining > 0);
collapse_flags();
cycles = update_gba();
continue;
alert:
if(cpu_alert == CPU_ALERT_IRQ)
{
cycles = cycles_remaining;
}
else
{
collapse_flags();
while(reg[CPU_HALT_STATE] != CPU_ACTIVE)
{
cycles = update_gba();
}
}
}
}
void init_cpu()
{
u32 i;
for(i = 0; i < 16; i++)
{
reg[i] = 0;
}
reg[REG_SP] = 0x03007F00;
reg[REG_PC] = 0x08000000;
reg[REG_CPSR] = 0x0000001F;
reg[CPU_HALT_STATE] = CPU_ACTIVE;
reg[CPU_MODE] = MODE_USER;
reg[CHANGED_PC_STATUS] = 0;
reg_mode[MODE_USER][5] = 0x03007F00;
reg_mode[MODE_IRQ][5] = 0x03007FA0;
reg_mode[MODE_FIQ][5] = 0x03007FA0;
reg_mode[MODE_SUPERVISOR][5] = 0x03007FE0;
}
void move_reg(u32 *new_reg)
{
u32 i;
for(i = 0; i < 32; i++)
{
new_reg[i] = reg[i];
}
reg = new_reg;
}
#define cpu_savestate_builder(type) \
void cpu_##type##_savestate(file_tag_type savestate_file) \
{ \
file_##type(savestate_file, reg, 0x100); \
file_##type##_array(savestate_file, spsr); \
file_##type##_array(savestate_file, reg_mode); \
} \
cpu_savestate_builder(read);
cpu_savestate_builder(write_mem);
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