base64.s

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· S 代码 · 共 298 行

.file	1 "base64.c"
.section .mdebug.abi32
.previous
.section	.text.av_base64_decode,"ax",@progbits
.align	2
.align	5
.globl	av_base64_decode
.ent	av_base64_decode
.type	av_base64_decode, @function
av_base64_decode:
.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
.mask	0x00000000,0
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

lb	$3,0($5)
beq	$3,$0,$L2
move	$12,$4

li	$2,61			# 0x3d
beq	$3,$2,$L2
addiu	$3,$3,-43

sltu	$2,$3,80
beq	$2,$0,$L5
nop

lui	$2,%hi(map2)
addiu	$4,$2,%lo(map2)
addu	$3,$3,$4
lbu	$7,0($3)
li	$2,255			# 0xff
beq	$7,$2,$L5
move	$15,$4

move	$10,$0
move	$4,$12
move	$11,$0
li	$24,6			# 0x6
li	$13,61			# 0x3d
j	$L8
li	$14,255			# 0xff

$L21:
beq	$7,$13,$L19
nop

beq	$2,$0,$L5
nop

lbu	$7,0($3)
beq	$7,$14,$L5
nop

$L8:
subu	$2,$4,$12
sll	$3,$11,6
slt	$9,$2,$6
andi	$2,$10,0x3
addiu	$10,$10,1
addu	$8,$5,$10
beq	$2,$0,$L11
addu	$11,$3,$7

sll	$2,$2,1
subu	$2,$24,$2
beq	$9,$0,$L11
sra	$2,$11,$2

sb	$2,0($4)
addiu	$4,$4,1
$L11:
lb	$7,0($8)
addiu	$2,$7,-43
addu	$3,$2,$15
bne	$7,$0,$L21
sltu	$2,$2,80

$L19:
j	$31
subu	$2,$4,$12

$L5:
j	$31
li	$2,-1			# 0xffffffffffffffff

$L2:
j	$31
move	$2,$0

.set	macro
.set	reorder
.end	av_base64_decode
.section	.text.av_base64_encode,"ax",@progbits
.align	2
.align	5
.globl	av_base64_encode
.ent	av_base64_encode
.type	av_base64_encode, @function
av_base64_encode:
.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
.mask	0x00000000,0
.fmask	0x00000000,0
.set	noreorder
.set	nomacro

li	$2,1073676288			# 0x3fff0000
ori	$2,$2,0xfffe
sltu	$2,$2,$7
beq	$2,$0,$L49
move	$10,$4

$L23:
j	$31
move	$2,$0

$L49:
li	$2,1431633920			# 0x55550000
sll	$3,$7,2
ori	$2,$2,0x5556
mult	$3,$2
sra	$3,$3,31
mfhi	$2
subu	$2,$2,$3
addiu	$2,$2,12
slt	$2,$5,$2
bne	$2,$0,$L23
nop

beq	$7,$0,$L50
move	$5,$4

lui	$2,%hi(b64.3707)
addiu	$12,$2,%lo(b64.3707)
move	$8,$0
move	$4,$0
move	$11,$12
lbu	$3,0($6)
$L52:
sll	$2,$4,8
addu	$4,$2,$3
addiu	$7,$7,-1
addiu	$6,$6,1
addiu	$8,$8,8
bne	$7,$0,$L41
sll	$9,$4,6

move	$6,$11
$L48:
srl	$2,$9,$8
$L53:
andi	$2,$2,0x3f
addu	$2,$2,$6
addiu	$8,$8,-6
lbu	$3,0($2)
slt	$4,$8,7
sb	$3,0($5)
beq	$4,$0,$L48
addiu	$5,$5,1

bgtz	$8,$L53
srl	$2,$9,$8

subu	$3,$5,$10
andi	$2,$3,0x3
beq	$2,$0,$L54
move	$2,$10

addiu	$4,$3,1
$L34:
andi	$3,$4,0x3
li	$2,61
sb	$2,0($5)
addiu	$4,$4,1
bne	$3,$0,$L34
addiu	$5,$5,1

j	$L51
move	$2,$10

$L50:
move	$2,$10
$L51:
$L54:
j	$31
sb	$0,0($5)

$L41:
srl	$2,$9,$8
andi	$2,$2,0x3f
addu	$2,$2,$12
lbu	$3,0($2)
addiu	$8,$8,-6
slt	$2,$8,7
sb	$3,0($5)
beq	$2,$0,$L41
addiu	$5,$5,1

j	$L52
lbu	$3,0($6)

.set	macro
.set	reorder
.end	av_base64_encode
.rdata
.align	2
.type	b64.3707, @object
.size	b64.3707, 65
b64.3707:
.ascii	"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123"
.ascii	"456789+/\000"
.align	2
.type	map2, @object
.size	map2, 80
map2:
.byte	62
.byte	-1
.byte	-1
.byte	-1
.byte	63
.byte	52
.byte	53
.byte	54
.byte	55
.byte	56
.byte	57
.byte	58
.byte	59
.byte	60
.byte	61
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	0
.byte	1
.byte	2
.byte	3
.byte	4
.byte	5
.byte	6
.byte	7
.byte	8
.byte	9
.byte	10
.byte	11
.byte	12
.byte	13
.byte	14
.byte	15
.byte	16
.byte	17
.byte	18
.byte	19
.byte	20
.byte	21
.byte	22
.byte	23
.byte	24
.byte	25
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	-1
.byte	26
.byte	27
.byte	28
.byte	29
.byte	30
.byte	31
.byte	32
.byte	33
.byte	34
.byte	35
.byte	36
.byte	37
.byte	38
.byte	39
.byte	40
.byte	41
.byte	42
.byte	43
.byte	44
.byte	45
.byte	46
.byte	47
.byte	48
.byte	49
.byte	50
.byte	51
.ident	"GCC: (GNU) 4.1.2"