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cielavenir committed Oct 25, 2022
2 parents 4067937 + 536dadc commit 407fd2b
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200 changes: 100 additions & 100 deletions Asm/arm/7zCrcOpt.asm
Original file line number Diff line number Diff line change
@@ -1,100 +1,100 @@
CODE32

EXPORT |CrcUpdateT4@16|

AREA |.text|, CODE, ARM

MACRO
CRC32_STEP_1

ldrb r4, [r1], #1
subs r2, r2, #1
eor r4, r4, r0
and r4, r4, #0xFF
ldr r4, [r3, +r4, lsl #2]
eor r0, r4, r0, lsr #8

MEND


MACRO
CRC32_STEP_4 $STREAM_WORD
eor r7, r7, r8
eor r7, r7, r9
eor r0, r0, r7
eor r0, r0, $STREAM_WORD
ldr $STREAM_WORD, [r1], #4
and r7, r0, #0xFF
and r8, r0, #0xFF00
and r9, r0, #0xFF0000
and r0, r0, #0xFF000000

ldr r7, [r6, +r7, lsl #2]
ldr r8, [r5, +r8, lsr #6]
ldr r9, [r4, +r9, lsr #14]
ldr r0, [r3, +r0, lsr #22]
MEND


|CrcUpdateT4@16| PROC

stmdb sp!, {r4-r11, lr}
cmp r2, #0
beq |$fin|

|$v1|
tst r1, #7
beq |$v2|
CRC32_STEP_1
bne |$v1|

|$v2|
cmp r2, #16
blo |$v3|

ldr r10, [r1], #4
ldr r11, [r1], #4

add r4, r3, #0x400
add r5, r3, #0x800
add r6, r3, #0xC00

mov r7, #0
mov r8, #0
mov r9, #0

sub r2, r2, #16

|$loop|
; pld [r1, #0x40]

CRC32_STEP_4 r10
CRC32_STEP_4 r11

subs r2, r2, #8
bhs |$loop|

sub r1, r1, #8
add r2, r2, #16

eor r7, r7, r8
eor r7, r7, r9
eor r0, r0, r7

|$v3|
cmp r2, #0
beq |$fin|

|$v4|
CRC32_STEP_1
bne |$v4|

|$fin|
ldmia sp!, {r4-r11, pc}

|CrcUpdateT4@16| ENDP

END
CODE32

EXPORT |CrcUpdateT4@16|

AREA |.text|, CODE, ARM

MACRO
CRC32_STEP_1

ldrb r4, [r1], #1
subs r2, r2, #1
eor r4, r4, r0
and r4, r4, #0xFF
ldr r4, [r3, +r4, lsl #2]
eor r0, r4, r0, lsr #8

MEND


MACRO
CRC32_STEP_4 $STREAM_WORD
eor r7, r7, r8
eor r7, r7, r9
eor r0, r0, r7
eor r0, r0, $STREAM_WORD
ldr $STREAM_WORD, [r1], #4
and r7, r0, #0xFF
and r8, r0, #0xFF00
and r9, r0, #0xFF0000
and r0, r0, #0xFF000000

ldr r7, [r6, +r7, lsl #2]
ldr r8, [r5, +r8, lsr #6]
ldr r9, [r4, +r9, lsr #14]
ldr r0, [r3, +r0, lsr #22]
MEND


|CrcUpdateT4@16| PROC

stmdb sp!, {r4-r11, lr}
cmp r2, #0
beq |$fin|

|$v1|
tst r1, #7
beq |$v2|
CRC32_STEP_1
bne |$v1|

|$v2|
cmp r2, #16
blo |$v3|

ldr r10, [r1], #4
ldr r11, [r1], #4

add r4, r3, #0x400
add r5, r3, #0x800
add r6, r3, #0xC00

mov r7, #0
mov r8, #0
mov r9, #0

sub r2, r2, #16

|$loop|
; pld [r1, #0x40]

CRC32_STEP_4 r10
CRC32_STEP_4 r11

subs r2, r2, #8
bhs |$loop|

sub r1, r1, #8
add r2, r2, #16

eor r7, r7, r8
eor r7, r7, r9
eor r0, r0, r7

|$v3|
cmp r2, #0
beq |$fin|

|$v4|
CRC32_STEP_1
bne |$v4|

|$fin|
ldmia sp!, {r4-r11, pc}

|CrcUpdateT4@16| ENDP

END
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