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some clean up - move dos unpacker, fix arm32 unpacker formatting

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This commit is contained in:
Dennis Ranke
2022-10-19 22:32:57 +02:00
parent 0d7cda06bb
commit c4fce626da
6 changed files with 41 additions and 28 deletions
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54
asm_unpackers/unpack_arm32.S
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@@ -17,7 +17,7 @@
upkr_unpack:
push { r3-r11, lr }
mov r2, #384
mov r2, #384
mov r3, #128
.Lclear:
subs r2, r2, #1
@@ -29,7 +29,7 @@ upkr_unpack:
bl upkr_decode_bit
bcc .Ldata
.Lmatch:
mov r5, #256
mov r5, #256
rsbs r6, r4, #0
blcc upkr_decode_bit
bcc .Lskip_offset
@@ -39,7 +39,7 @@ upkr_unpack:
popeq { r3-r11, pc }
.Lskip_offset:
mov r5, #256+64
mov r5, #256+64
bl upkr_decode_length
.Lcopy_loop:
ldrb r5, [r0, r3]
@@ -55,46 +55,46 @@ upkr_unpack:
.Ldata_loop:
bl upkr_decode_bit
adc r5, r5, r5
movs r4, r5, lsr #8
movs r4, r5, lsr #8
beq .Ldata_loop
b .Lstore
b .Lstore
.type upkr_decode_length, %function
upkr_decode_length:
mov r12, lr
mov r12, lr
mov r4, #0
mvn r6, #0
mvn r6, #0
.Lbit_loop:
bl upkr_decode_bit_inc
addcc r4, r4, r6
movcc pc, r12
addcc r4, r4, r6
movcc pc, r12
bl upkr_decode_bit_inc
addcs r4, r4, r6
mov r6, r6, lsl #1
mov r6, r6, lsl #1
b .Lbit_loop
.type upkr_decode_bit, %function
upkr_decode_bit_inc:
add r5, r5, #1
add r5, r5, #1
upkr_decode_bit:
cmp r2, #4096
ldrltb r8, [r1], #1
orrlt r2, r8, r2, lsl#8
blt upkr_decode_bit
cmp r2, #4096
ldrltb r8, [r1], #1
orrlt r2, r8, r2, lsl#8
blt upkr_decode_bit
ldrb r8, [sp, -r5]
and r9, r2, #255
add r9, r9, #1
cmp r8, r9
rsbcs r8, r8, #256
mvn r9, r2, lsr#8
addcs r9, r9, #1
mla r2, r8, r9, r2
add r9, r8, #8
sub r8, r8, r9, lsr#4
rsbcs r8, r8, #256
strb r8, [sp, -r5]
mov pc, r14
and r9, r2, #255
add r9, r9, #1
cmp r8, r9
rsbcs r8, r8, #256
mvn r9, r2, lsr#8
addcs r9, r9, #1
mla r2, r8, r9, r2
add r9, r8, #8
sub r8, r8, r9, lsr#4
rsbcs r8, r8, #256
strb r8, [sp, -r5]
mov pc, r14