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ARMV30MZ.s
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//
// ARMV30MZ.s
// V30MZ cpu emulator for arm32.
//
// Created by Fredrik Ahlström on 2021-12-19.
// Copyright © 2021-2024 Fredrik Ahlström. All rights reserved.
//
#ifdef __arm__
#include "ARMV30MZmac.h"
.syntax unified
.arm
#ifdef NDS
.section .itcm ;@ For the NDS ARM9
#elif GBA
.section .iwram, "ax", %progbits ;@ For the GBA
#else
.section .text ;@ For anything else
#endif
.align 2
.global V30Init
.global V30Reset
.global V30SetIRQPin
.global V30SetNMIPin
.global V30SetResetPin
.global V30RestoreAndRunXCycles
.global V30RunXCycles
.global V30CheckIRQs
.global V30SaveState
.global V30LoadState
.global V30GetStateSize
.global V30RedirectOpcode
.global V30DecodePC
.global V30EncodePC
.global v30OutOfCycles
.global defaultV30
.global V30OpTable
.global PZSTable
.global i_bv
.global i_bnv
.global i_bc
.global i_bnc
.global i_be
.global i_bne
.global i_bnh
.global i_bh
.global i_bn
.global i_bp
.global i_bpe
.global i_bpo
.global i_blt
.global i_bge
.global i_ble
.global i_bgt
//
// All opcodes are free to also use r4-r5 without pushing to stack.
// If an opcode calls another opcode, the caller is responsible for
// saving r4-r5 before the call if needed.
//
;@----------------------------------------------------------------------------
i_add_br8:
_00: ;@ ADD BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
add80Reg:
ldrb r0,[v30ptr,-v30ofs]
add8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
add80EA:
add8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_add_wr16:
_01: ;@ ADD WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
add81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
add16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
add81EA:
add16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_add_r8b:
_02: ;@ ADD R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
add8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_add_r16w:
_03: ;@ ADD R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
add16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_add_ald8:
_04: ;@ ADD ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
add8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_add_awd16:
_05: ;@ ADD AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
add16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_push_ds1:
_06: ;@ PUSH DS1/ES
;@----------------------------------------------------------------------------
ldrh r1,[v30ptr,#v30SRegDS1+2]
bl v30PushW
fetch 2
;@----------------------------------------------------------------------------
i_pop_ds1:
_07: ;@ POP DS1/ES
;@----------------------------------------------------------------------------
popWord
strh r0,[v30ptr,#v30SRegDS1+2]
fetch 3
;@----------------------------------------------------------------------------
i_or_br8:
_08: ;@ OR BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
or80Reg:
ldrb r0,[v30ptr,-v30ofs]
or8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
or80EA:
or8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_or_wr16:
_09: ;@ OR WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
or81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
or16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
or81EA:
or16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_or_r8b:
_0A: ;@ OR R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r3,r4,#0xff
ldrbpl r0,[v30ptr,-r3]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
or8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_or_r16w:
_0B: ;@ OR R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
or16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_or_ald8:
_0C: ;@ OR ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
or8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_or_awd16:
_0D: ;@ OR AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
or16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_push_ps:
_0E: ;@ PUSH PS/CS
;@----------------------------------------------------------------------------
ldrh r1,[v30ptr,#v30SRegPS+2]
bl v30PushW
fetch 2
;@----------------------------------------------------------------------------
i_adc_br8:
_10: ;@ ADDC/ADC BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
adc80Reg:
ldrb r0,[v30ptr,-v30ofs]
adc8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
adc80EA:
adc8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_adc_wr16:
_11: ;@ ADDC/ADC WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
adc81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
adc16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
adc81EA:
adc16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_adc_r8b:
_12: ;@ ADDC/ADC R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
adc8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_adc_r16w:
_13: ;@ ADDC/ADC R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
adc16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_adc_ald8:
_14: ;@ ADDC/ADC ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
adc8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_adc_awd16:
_15: ;@ ADDC/ADC AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
adc16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_push_ss:
_16: ;@ PUSH SS
;@----------------------------------------------------------------------------
ldr v30csr,[v30ptr,#v30SRegSS]
ldr v30ofs,[v30ptr,#v30RegSP]
mov r1,v30csr,lsr#16
bl v30PushLastW
fetch 2
;@----------------------------------------------------------------------------
i_pop_ss:
_17: ;@ POP SS
;@----------------------------------------------------------------------------
popWord
strh r0,[v30ptr,#v30SRegSS+2]
fetchForce 3 ;@ No interrupt directly after this instruction
;@----------------------------------------------------------------------------
i_sbb_br8:
_18: ;@ SUBC/SBB BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
subc80Reg:
ldrb r0,[v30ptr,-v30ofs]
subc8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
subc80EA:
subc8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_sbb_wr16:
_19: ;@ SUBC/SBB WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
subc81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
rsbc16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
subc81EA:
rsbc16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_sbb_r8b:
_1A: ;@ SUBC/SBB R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
subc8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_sbb_r16w:
_1B: ;@ SUBC/SBB R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
subc16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_sbb_ald8:
_1C: ;@ SUBC/SBB ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
subc8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_sbb_awd16:
_1D: ;@ SUBC/SBB AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
subc16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_push_ds0:
_1E: ;@ PUSH DS0/DS
;@----------------------------------------------------------------------------
ldrh r1,[v30ptr,#v30SRegDS0+2]
bl v30PushW
fetch 2
;@----------------------------------------------------------------------------
i_pop_ds0:
_1F: ;@ POP DS0/DS
;@----------------------------------------------------------------------------
popWord
strh r0,[v30ptr,#v30SRegDS0+2]
fetch 3
;@----------------------------------------------------------------------------
i_and_br8:
_20: ;@ AND BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
and80Reg:
ldrb r0,[v30ptr,-v30ofs]
and8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
and80EA:
and8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_and_wr16:
_21: ;@ AND WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
and81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
and16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
and81EA:
and16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_and_r8b:
_22: ;@ AND R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
and8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_and_r16w:
_23: ;@ AND R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
and16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_and_ald8:
_24: ;@ AND ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
and8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_and_awd16:
_25: ;@ AND AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
and16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_ds1:
_26: ;@ DS1/ES prefix
;@----------------------------------------------------------------------------
ldr v30csr,[v30ptr,#v30SRegDS1]
getNextByte
add r2,v30ptr,#v30SegTbl
ldrb r1,[r2,r0]
SetSegmentPrefix
bic v30f,v30f,r1,lsl#6 ;@ Clear prefixes if not applicable
// eatCycles 1
ldr pc,[v30ptr,r0,lsl#2]
;@----------------------------------------------------------------------------
i_daa:
_27: ;@ ADJ4A/DAA
;@----------------------------------------------------------------------------
ldrb r0,[v30ptr,#v30RegAL]
and v30f,v30f,#PSR_A|PSR_C
mov r1,#0x66000000
cmn r1,r0,lsl#28
orrcs v30f,v30f,#PSR_A
cmp r0,#0x9A
tstcc v30f,v30f,lsr#2 ;@ #PSR_C
biccc r1,r1,#0x60000000
tst v30f,#PSR_A
biceq r1,r1,#0x06000000
adds r0,r1,r0,lsl#24
mrs r1,cpsr ;@ S, Z, V & C.
orr v30f,v30f,r1,lsr#28
mov r0,r0,lsr#24
strb r0,[v30ptr,#v30RegAL]
strb r0,[v30ptr,#v30ParityVal]
fetch 10
;@----------------------------------------------------------------------------
i_sub_br8:
_28: ;@ SUB BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
sub80Reg:
ldrb r0,[v30ptr,-v30ofs]
sub8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
sub80EA:
sub8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_sub_wr16:
_29: ;@ SUB WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
sub81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
rsb16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
sub81EA:
rsb16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_sub_r8b:
_2A: ;@ SUB R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
sub8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_sub_r16w:
_2B: ;@ SUB R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
sub16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_sub_ald8:
_2C: ;@ SUB ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
sub8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_sub_awd16:
_2D: ;@ SUB AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
sub16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_ps:
_2E: ;@ PS/CS prefix
;@----------------------------------------------------------------------------
ldr v30csr,[v30ptr,#v30SRegPS]
getNextByte
add r2,v30ptr,#v30SegTbl
ldrb r1,[r2,r0]
SetSegmentPrefix
bic v30f,v30f,r1,lsl#6 ;@ Clear prefixes if not applicable
// eatCycles 1
ldr pc,[v30ptr,r0,lsl#2]
;@----------------------------------------------------------------------------
i_das:
_2F: ;@ ADJ4S/DAS
;@----------------------------------------------------------------------------
ldrb r0,[v30ptr,#v30RegAL]
mov r2,r0,ror#4
cmp r2,#0xA0000000
orrcs v30f,v30f,#PSR_A
cmp r0,#0x9A
tstcc v30f,v30f,lsr#2 ;@ #PSR_C
ands v30f,v30f,#PSR_A
orrcs v30f,v30f,#PSR_C
subcs r0,r0,#0x60
subne r0,r0,#0x06
strb r0,[v30ptr,#v30RegAL]
movs r1,r0,lsl#24
orrmi v30f,v30f,#PSR_S
orreq v30f,v30f,#PSR_Z
cmp r1,r2,ror#4
orrvs v30f,v30f,#PSR_V
strb r0,[v30ptr,#v30ParityVal]
fetch 11
;@----------------------------------------------------------------------------
i_xor_br8:
_30: ;@ XOR BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
bmi 0f
and v30ofs,r1,#0xff
xor80Reg:
ldrb r0,[v30ptr,-v30ofs]
xor8 r4,r0
strb r1,[v30ptr,-v30ofs]
fetch 1
0:
bl v30ReadEA
xor80EA:
xor8 r4,r0
bl v30WriteSegOfs
fetch 3
;@----------------------------------------------------------------------------
i_xor_wr16:
_31: ;@ XOR WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
bmi 0f
xor81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrh r0,[v30ofs,#v30Regs]
xor16 r0,r4
strh r1,[v30ofs,#v30Regs]
fetch 1
0:
bl v30ReadEAW
xor81EA:
xor16 r0,r4
bl v30WriteSegOfsW
fetch 3
;@----------------------------------------------------------------------------
i_xor_r8b:
_32: ;@ XOR R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
xor8 r0,r1
strb r1,[v30ptr,-r4,lsr#24]
fetch 1
;@----------------------------------------------------------------------------
i_xor_r16w:
_33: ;@ XOR R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
xor16 r0,r1
strh r1,[r4,#v30Regs]
fetch 1
;@----------------------------------------------------------------------------
i_xor_ald8:
_34: ;@ XOR ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
xor8 r0,r1
strb r1,[v30ptr,#v30RegAL]
fetch 1
;@----------------------------------------------------------------------------
i_xor_awd16:
_35: ;@ XOR AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
xor16 r0,r1
strh r1,[v30ptr,#v30RegAW]
fetch 1
;@----------------------------------------------------------------------------
i_ss:
_36: ;@ SS prefix
;@----------------------------------------------------------------------------
ldr v30csr,[v30ptr,#v30SRegSS]
getNextByte
add r2,v30ptr,#v30SegTbl
ldrb r1,[r2,r0]
SetSegmentPrefix
bic v30f,v30f,r1,lsl#6 ;@ Clear prefixes if not applicable
// eatCycles 1
ldr pc,[v30ptr,r0,lsl#2]
;@----------------------------------------------------------------------------
i_aaa:
_37: ;@ ADJBA/AAA
;@----------------------------------------------------------------------------
ldrh r0,[v30ptr,#v30RegAW]
mov r1,r0,lsl#28
cmp r1,#0xA0000000
tstcc v30f,v30f,lsr#5 ;@ Shift out PSR_A
movcs v30f,#PSR_Z+PSR_A+PSR_C
movcc v30f,#PSR_S
strb r1,[v30ptr,#v30ParityVal] ;@ Parity allways set
orr r0,r0,#0x00F0
addcs r0,r0,#0x0016
bic r0,r0,#0x00F0
strh r0,[v30ptr,#v30RegAW]
fetch 9
;@----------------------------------------------------------------------------
i_cmp_br8:
_38: ;@ CMP BR8
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r1,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
ldrb r4,[v30ptr,-r1,lsr#24]
andpl v30ofs,r1,#0xff
cmp80Reg:
ldrbpl r0,[v30ptr,-v30ofs]
blmi v30ReadEA1
sub8 r4,r0
fetch 1
cmp80EA:
sub8 r4,r0
fetch 2
;@----------------------------------------------------------------------------
i_cmp_wr16:
_39: ;@ CMP WR16
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r2,v30ptr,r1,lsr#1
ldr r4,[r2,#v30Regs2]
cmp r0,#0xC0
cmp81Reg:
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
rsb16 r0,r4
fetch 1
cmp81EA:
rsb16 r0,r4
fetch 2
;@----------------------------------------------------------------------------
i_cmp_r8b:
_3A: ;@ CMP R8b
;@----------------------------------------------------------------------------
getNextByte
add v30ofs,v30ptr,r0,lsl#2
ldr r4,[v30ofs,#v30ModRmReg]
cmp r0,#0xC0
andpl r1,r4,#0xff
ldrbpl r0,[v30ptr,-r1]
blmi v30ReadEA1
ldrb r1,[v30ptr,-r4,lsr#24]
sub8 r0,r1
fetch 1
;@----------------------------------------------------------------------------
i_cmp_r16w:
_3B: ;@ CMP R16W
;@----------------------------------------------------------------------------
getNextByte
and r1,r0,#0x38
add r4,v30ptr,r1,lsr#1
cmp r0,#0xC0
andpl r0,r0,#7
add v30ofs,v30ptr,r0,lsl#2
ldrhpl r0,[v30ofs,#v30Regs]
blmi v30ReadEAW1
ldr r1,[r4,#v30Regs2]
sub16 r0,r1
fetch 1
;@----------------------------------------------------------------------------
i_cmp_ald8:
_3C: ;@ CMP ALD8
;@----------------------------------------------------------------------------
getNextByte
ldrb r1,[v30ptr,#v30RegAL]
sub8 r0,r1
fetch 1
;@----------------------------------------------------------------------------
i_cmp_awd16:
_3D: ;@ CMP AWD16
;@----------------------------------------------------------------------------
getNextWord
ldr r1,[v30ptr,#v30RegAW-2]
sub16 r0,r1
fetch 1
;@----------------------------------------------------------------------------
i_ds0:
_3E: ;@ DS0/DS prefix