mdct.mid

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」· MID 代码 · 共 4,203 行 · 第 1/5 页

	.file	1 "mdct.c"
	.section .mdebug.abi32
	.previous
	.section	.text.mdct_backward,"ax",@progbits
	.align	2
	.align	5
	.globl	mdct_backward
	.ent	mdct_backward
	.type	mdct_backward, @function
mdct_backward:
	.frame	$sp,808,$31		# vars= 768, regs= 9/0, args= 0, gp= 0
	.mask	0x40ff0000,-8
	.fmask	0x00000000,0
	.set	noreorder
	.set	nomacro
	
	addiu	$sp,$sp,-808
	sra	$3,$4,1
	andi	$2,$4,0x40
	sw	$fp,800($sp)
	sw	$23,796($sp)
	sw	$22,792($sp)
	sw	$21,788($sp)
	sw	$20,784($sp)
	sw	$19,780($sp)
	sw	$18,776($sp)
	sw	$17,772($sp)
	sw	$16,768($sp)
	sw	$5,812($sp)
	sw	$6,816($sp)
	bne	$2,$0,$L89
	sw	$3,276($sp)

	li	$3,6			# 0x6
	addiu	$3,$3,1
$L94:
	sra	$2,$4,$3
	andi	$2,$2,0x1
	beq	$2,$0,$L94
	addiu	$3,$3,1

	addiu	$3,$3,-1
	li	$2,13			# 0xd
	subu	$2,$2,$3
	li	$3,2			# 0x2
	sll	$3,$3,$2
	sll	$8,$3,2
	sw	$2,176($sp)
	sw	$3,172($sp)
	sw	$8,168($sp)
	move	$15,$8
	move	$16,$8
$L4:
	lw	$9,276($sp)
	sra	$2,$4,2
	addu	$3,$9,$2
	lw	$11,816($sp)
	sll	$3,$3,2
	addu	$3,$3,$11
	lw	$13,812($sp)
	lw	$14,812($sp)
	sll	$10,$9,2
	sw	$3,16($sp)
	sll	$2,$2,2
	lui	$12,%hi(sincos_lookup0)
	addiu	$3,$12,%lo(sincos_lookup0)
	addu	$13,$10,$13
	addu	$14,$14,$2
	sll	$15,$15,1
	lw	$24,16($sp)
	sw	$10,284($sp)
	sw	$2,164($sp)
	sw	$13,280($sp)
	move	$fp,$3
	addiu	$23,$13,-28
	sw	$14,160($sp)
	sw	$15,704($sp)
	addu	$25,$16,$3
$L7:
	lw	$2,24($23)
	lw	$4,4($fp)
	lw	$10,0($fp)
	lw	$6,16($23)
	sra	$7,$10,31
	move	$8,$6
	sra	$3,$2,31
	sra	$5,$4,31
	mul	$19,$3,$10
	mul	$21,$5,$8
	mul	$18,$7,$8
	mul	$20,$5,$2
	multu	$10,$2
	sra	$9,$6,31
	mfhi	$17
	multu	$8,$4
	move	$6,$10
	mfhi	$15
	multu	$8,$6
	addiu	$24,$24,-16
	mfhi	$13
	multu	$2,$4
	lw	$10,704($sp)
	mfhi	$11
	mul	$22,$9,$6
	addu	$fp,$fp,$10
	addu	$18,$22,$18
	mul	$22,$3,$4
	mul	$3,$9,$4
	addu	$20,$22,$20
	mul	$22,$7,$2
	addu	$4,$3,$21
	addu	$2,$22,$19
	addu	$13,$18,$13
	addu	$11,$20,$11
	addu	$17,$2,$17
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$4,$17,$15
	sll	$2,$2,1
	sll	$4,$4,1
	sw	$2,8($24)
	sw	$4,12($24)
	lw	$2,8($23)
	lw	$4,4($25)
	lw	$6,0($23)
	lw	$10,0($25)
	move	$8,$6
	sra	$3,$2,31
	sra	$9,$6,31
	sra	$7,$10,31
	move	$6,$10
	sra	$5,$4,31
	mul	$10,$3,$10
	mul	$20,$5,$2
	mul	$18,$7,$8
	mul	$21,$5,$8
	multu	$6,$2
	sw	$10,720($sp)
	mfhi	$17
	multu	$8,$4
	lw	$10,160($sp)
	mfhi	$15
	multu	$8,$6
	addiu	$23,$23,-32
	mfhi	$13
	multu	$2,$4
	sltu	$22,$23,$10
	mfhi	$11
	mul	$19,$9,$6
	lw	$10,704($sp)
	addu	$18,$19,$18
	mul	$19,$3,$4
	addu	$13,$18,$13
	addu	$20,$19,$20
	lw	$19,720($sp)
	addu	$11,$20,$11
	mtlo	$19
	madd	$7,$2
	addu	$25,$25,$10
	mflo	$2
	mul	$3,$9,$4
	addu	$17,$2,$17
	addu	$4,$3,$21
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$3,$17,$15
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,0($24)
	beq	$22,$0,$L7
	sw	$3,4($24)

	lw	$4,168($sp)
	subu	$2,$0,$4
	subu	$2,$2,$4
	sw	$2,684($sp)
	subu	$25,$fp,$4
$L9:
	lw	$2,24($23)
	lw	$4,0($fp)
	lw	$10,4($fp)
	lw	$6,16($23)
	sra	$7,$10,31
	move	$8,$6
	sra	$3,$2,31
	sra	$5,$4,31
	mul	$19,$3,$10
	mul	$21,$5,$8
	mul	$18,$7,$8
	mul	$20,$5,$2
	multu	$10,$2
	sra	$9,$6,31
	mfhi	$17
	multu	$8,$4
	move	$6,$10
	mfhi	$15
	multu	$8,$6
	addiu	$24,$24,-16
	mfhi	$13
	multu	$2,$4
	lw	$10,684($sp)
	mfhi	$11
	mul	$22,$9,$6
	addu	$fp,$fp,$10
	addu	$18,$22,$18
	mul	$22,$3,$4
	mul	$3,$9,$4
	addu	$20,$22,$20
	mul	$22,$7,$2
	addu	$4,$3,$21
	addu	$2,$22,$19
	addu	$13,$18,$13
	addu	$11,$20,$11
	addu	$17,$2,$17
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$4,$17,$15
	sll	$2,$2,1
	sll	$4,$4,1
	sw	$2,8($24)
	sw	$4,12($24)
	lw	$2,8($23)
	lw	$4,0($25)
	lw	$6,0($23)
	lw	$10,4($25)
	move	$8,$6
	sra	$3,$2,31
	sra	$9,$6,31
	sra	$7,$10,31
	move	$6,$10
	sra	$5,$4,31
	mul	$10,$3,$10
	mul	$20,$5,$2
	mul	$18,$7,$8
	mul	$21,$5,$8
	multu	$6,$2
	sw	$10,720($sp)
	mfhi	$17
	multu	$8,$4
	lw	$10,812($sp)
	mfhi	$15
	multu	$8,$6
	addiu	$23,$23,-32
	mfhi	$13
	multu	$2,$4
	sltu	$22,$23,$10
	mfhi	$11
	mul	$19,$9,$6
	lw	$10,684($sp)
	addu	$18,$19,$18
	mul	$19,$3,$4
	addu	$13,$18,$13
	addu	$20,$19,$20
	lw	$19,720($sp)
	addu	$11,$20,$11
	mtlo	$19
	madd	$7,$2
	addu	$25,$25,$10
	mflo	$2
	mul	$3,$9,$4
	addu	$17,$2,$17
	addu	$4,$3,$21
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$3,$17,$15
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,0($24)
	beq	$22,$0,$L9
	sw	$3,4($24)

	lui	$4,%hi(sincos_lookup0)
	lw	$5,280($sp)
	lw	$6,168($sp)
	lw	$7,704($sp)
	addiu	$2,$4,%lo(sincos_lookup0)
	lw	$24,16($sp)
	addiu	$23,$5,-32
	addu	$25,$6,$2
	addu	$fp,$7,$2
$L11:
	lw	$2,16($23)
	lw	$4,4($25)
	lw	$10,0($25)
	lw	$6,24($23)
	sra	$7,$10,31
	move	$8,$6
	sra	$3,$2,31
	sra	$5,$4,31
	mul	$19,$3,$10
	mul	$21,$5,$8
	mul	$18,$7,$8
	mul	$20,$5,$2
	multu	$10,$2
	sra	$9,$6,31
	mfhi	$17
	multu	$8,$4
	move	$6,$10
	mfhi	$15
	multu	$8,$6
	lw	$10,704($sp)
	mfhi	$13
	multu	$2,$4
	addu	$25,$25,$10
	mfhi	$11
	mul	$22,$9,$6
	addu	$18,$22,$18
	mul	$22,$3,$4
	mul	$3,$9,$4
	addu	$20,$22,$20
	mul	$22,$7,$2
	addu	$4,$3,$21
	addu	$2,$22,$19
	addu	$13,$18,$13
	addu	$11,$20,$11
	addu	$17,$2,$17
	addu	$15,$4,$15
	subu	$2,$13,$11
	addu	$4,$15,$17
	sll	$2,$2,1
	sll	$4,$4,1
	sw	$2,0($24)
	sw	$4,4($24)
	lw	$2,0($23)
	lw	$4,4($fp)
	lw	$6,8($23)
	lw	$10,0($fp)
	move	$8,$6
	sra	$3,$2,31
	sra	$9,$6,31
	sra	$7,$10,31
	move	$6,$10
	sra	$5,$4,31
	mul	$10,$3,$10
	mul	$20,$5,$2
	mul	$18,$7,$8
	mul	$21,$5,$8
	multu	$6,$2
	sw	$10,720($sp)
	mfhi	$17
	multu	$8,$4
	lw	$10,160($sp)
	mfhi	$15
	multu	$8,$6
	addiu	$23,$23,-32
	mfhi	$13
	multu	$2,$4
	sltu	$22,$23,$10
	mfhi	$11
	mul	$19,$9,$6
	lw	$10,704($sp)
	addu	$18,$19,$18
	mul	$19,$3,$4
	addu	$13,$18,$13
	addu	$20,$19,$20
	lw	$19,720($sp)
	addu	$11,$20,$11
	mtlo	$19
	madd	$7,$2
	addu	$fp,$fp,$10
	mflo	$2
	mul	$3,$9,$4
	addu	$17,$2,$17
	addu	$4,$3,$21
	addu	$15,$4,$15
	subu	$2,$13,$11
	addu	$3,$15,$17
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,8($24)
	sw	$3,12($24)
	beq	$22,$0,$L11
	addiu	$24,$24,16

	lw	$4,704($sp)
	lw	$5,168($sp)
	subu	$4,$0,$4
	addu	$2,$4,$fp
	subu	$2,$2,$5
	sw	$4,64($sp)
	move	$25,$2
	subu	$fp,$2,$5
$L13:
	lw	$2,16($23)
	lw	$4,0($25)
	lw	$10,4($25)
	lw	$6,24($23)
	sra	$7,$10,31
	move	$8,$6
	sra	$3,$2,31
	sra	$5,$4,31
	mul	$19,$3,$10
	mul	$21,$5,$8
	mul	$18,$7,$8
	mul	$20,$5,$2
	multu	$10,$2
	sra	$9,$6,31
	mfhi	$17
	multu	$8,$4
	move	$6,$10
	mfhi	$15
	multu	$8,$6
	lw	$10,684($sp)
	mfhi	$13
	multu	$2,$4
	addu	$25,$25,$10
	mfhi	$11
	mul	$22,$9,$6
	addu	$18,$22,$18
	mul	$22,$3,$4
	mul	$3,$9,$4
	addu	$20,$22,$20
	mul	$22,$7,$2
	addu	$4,$3,$21
	addu	$2,$22,$19
	addu	$13,$18,$13
	addu	$11,$20,$11
	addu	$17,$2,$17
	addu	$15,$4,$15
	subu	$2,$13,$11
	addu	$4,$15,$17
	sll	$2,$2,1
	sll	$4,$4,1
	sw	$2,0($24)
	sw	$4,4($24)
	lw	$2,0($23)
	lw	$4,0($fp)
	lw	$6,8($23)
	lw	$10,4($fp)
	move	$8,$6
	sra	$3,$2,31
	sra	$9,$6,31
	sra	$7,$10,31
	move	$6,$10
	sra	$5,$4,31
	mul	$10,$3,$10
	mul	$20,$5,$2
	mul	$18,$7,$8
	mul	$21,$5,$8
	multu	$6,$2
	sw	$10,720($sp)
	mfhi	$17
	multu	$8,$4
	lw	$10,812($sp)
	mfhi	$15
	multu	$8,$6
	addiu	$23,$23,-32
	mfhi	$13
	multu	$2,$4
	sltu	$22,$23,$10
	mfhi	$11
	mul	$19,$9,$6
	lw	$10,684($sp)
	addu	$18,$19,$18
	mul	$19,$3,$4
	addu	$13,$18,$13
	addu	$20,$19,$20
	lw	$19,720($sp)
	addu	$11,$20,$11
	mtlo	$19
	madd	$7,$2
	addu	$fp,$fp,$10
	mflo	$2
	mul	$3,$9,$4
	addu	$17,$2,$17
	addu	$4,$3,$21
	addu	$15,$4,$15
	subu	$2,$13,$11
	addu	$3,$15,$17
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,8($24)
	sw	$3,12($24)
	beq	$22,$0,$L13
	addiu	$24,$24,16

	lw	$4,176($sp)
	lw	$5,284($sp)
	lw	$6,816($sp)
	nor	$2,$0,$4
	addiu	$2,$2,8
	addu	$5,$5,$6
	sw	$2,24($sp)
	blez	$2,$L15
	sw	$5,20($sp)

	li	$7,1			# 0x1
	sw	$0,256($sp)
	sw	$7,252($sp)
$L17:
	lw	$8,256($sp)
	lw	$9,176($sp)
	li	$5,4			# 0x4
	addu	$2,$8,$9
	lw	$11,276($sp)
	sll	$5,$5,$2
	sll	$10,$5,2
	sra	$4,$11,$8
	sra	$2,$4,1
	lw	$12,20($sp)
	subu	$3,$0,$10
	sll	$4,$4,2
	sll	$2,$2,2
	subu	$3,$3,$10
	sll	$13,$5,4
	sw	$4,244($sp)
	addu	$2,$12,$2
	subu	$3,$3,$10
	addu	$4,$12,$4
	addiu	$2,$2,-32
	addiu	$4,$4,-32
	subu	$3,$3,$10
	sll	$5,$5,3
	subu	$14,$0,$13
	sw	$10,156($sp)
	sw	$13,700($sp)
	sw	$2,72($sp)
	sw	$4,68($sp)
	sw	$3,708($sp)
	sw	$0,60($sp)
	sw	$5,696($sp)
	sw	$14,76($sp)
$L18:
	lw	$16,156($sp)
	lw	$15,696($sp)
	lui	$18,%hi(sincos_lookup0)
	addu	$2,$15,$16
	addiu	$18,$18,%lo(sincos_lookup0)
	addu	$17,$2,$16
	addu	$19,$17,$18
	addu	$2,$2,$18
	addu	$22,$16,$18
	addu	$23,$15,$18
	lw	$fp,68($sp)
	lw	$20,72($sp)
	sw	$17,688($sp)
	sw	$2,56($sp)
	sw	$19,88($sp)
	sw	$22,84($sp)
	sw	$23,80($sp)
	sw	$18,248($sp)
$L19:
	lw	$5,24($20)
	lw	$6,24($fp)
	lw	$8,28($fp)
	addu	$4,$6,$5
	sw	$4,24($fp)
	lw	$2,28($20)
	lw	$24,248($sp)
	addu	$4,$2,$8
	sw	$4,28($fp)
	lw	$4,4($24)
	lw	$10,0($24)
	subu	$6,$6,$5
	subu	$2,$2,$8
	sra	$7,$6,31
	move	$8,$10
	sra	$5,$4,31
	sra	$9,$10,31
	mul	$10,$9,$2
	mul	$19,$7,$8
	mul	$21,$5,$2
	mul	$25,$5,$6
	multu	$8,$6
	sw	$10,724($sp)
	mfhi	$17
	multu	$2,$4
	lw	$10,88($sp)
	lw	$11,688($sp)
	mfhi	$15
	multu	$2,$8
	lui	$18,%hi(sincos_lookup0+4096)
	addu	$10,$10,$11
	addiu	$24,$18,%lo(sincos_lookup0+4096)
	lw	$11,76($sp)
	lw	$18,724($sp)
	mfhi	$13
	multu	$6,$4
	sra	$3,$2,31
	addu	$23,$11,$10
	mfhi	$11
	mtlo	$18
	madd	$3,$8
	lw	$22,16($20)
	mflo	$18
	sw	$10,88($sp)
	sw	$18,288($sp)
	mul	$18,$7,$4
	mul	$7,$3,$4
	addu	$25,$18,$25
	mul	$18,$9,$6
	lw	$8,288($sp)
	addu	$6,$18,$19
	addu	$4,$7,$21
	addu	$13,$8,$13
	addu	$11,$25,$11
	addu	$17,$6,$17
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$3,$17,$15
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,24($20)
	sw	$3,28($20)
	lw	$6,16($fp)
	lw	$8,20($fp)
	addu	$4,$6,$22
	sw	$4,16($fp)
	lw	$2,20($20)
	lw	$9,84($sp)
	addu	$4,$2,$8
	sw	$4,20($fp)
	lw	$10,0($9)
	lw	$4,4($9)
	subu	$6,$6,$22
	subu	$2,$2,$8
	sra	$9,$10,31
	move	$8,$10
	sra	$7,$6,31
	mul	$10,$9,$2
	sra	$5,$4,31
	mul	$25,$5,$6
	mul	$19,$7,$8
	mul	$21,$5,$2
	multu	$8,$6
	lw	$11,688($sp)
	mfhi	$17
	multu	$2,$4
	sw	$10,724($sp)
	lw	$18,84($sp)
	lw	$10,248($sp)
	sltu	$23,$23,$24
	lw	$24,688($sp)
	mfhi	$15
	multu	$2,$8
	addu	$10,$10,$11
	addu	$18,$18,$24
	lw	$22,8($20)
	mfhi	$13
	sw	$10,248($sp)
	multu	$6,$4
	sw	$18,84($sp)
	lw	$18,724($sp)
	mfhi	$11
	sra	$3,$2,31
	mtlo	$18
	madd	$3,$8
	mflo	$18
	mul	$24,$7,$4
	sw	$18,292($sp)
	mul	$7,$3,$4
	addu	$18,$24,$25
	mul	$24,$9,$6
	lw	$8,292($sp)
	addu	$6,$24,$19
	addu	$4,$7,$21
	addu	$13,$8,$13
	addu	$11,$18,$11
	addu	$17,$6,$17
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$3,$17,$15
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,16($20)
	sw	$3,20($20)
	lw	$6,8($fp)
	lw	$8,12($fp)
	addu	$4,$6,$22
	sw	$4,8($fp)
	lw	$2,12($20)
	lw	$9,80($sp)
	addu	$4,$2,$8
	sw	$4,12($fp)
	lw	$4,4($9)
	lw	$10,0($9)
	subu	$6,$6,$22
	subu	$2,$2,$8
	sra	$7,$6,31
	move	$8,$10
	sra	$5,$4,31
	sra	$9,$10,31
	mul	$10,$9,$2
	mul	$19,$7,$8
	mul	$21,$5,$2
	mul	$25,$5,$6
	multu	$8,$6
	sw	$10,300($sp)
	mfhi	$17
	multu	$2,$4
	lw	$10,80($sp)
	mfhi	$15
	multu	$2,$8
	lw	$11,688($sp)
	lw	$18,300($sp)
	mfhi	$13
	multu	$6,$4
	sra	$3,$2,31
	addu	$10,$10,$11
	mfhi	$11
	mtlo	$18
	madd	$3,$8
	lw	$22,0($20)
	mflo	$18
	mul	$24,$7,$4
	sw	$18,296($sp)
	mul	$7,$3,$4
	addu	$18,$24,$25
	mul	$24,$9,$6
	lw	$8,296($sp)
	addu	$6,$24,$19
	addu	$4,$7,$21
	addu	$13,$8,$13
	addu	$11,$18,$11
	addu	$17,$6,$17
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$3,$17,$15
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,8($20)
	sw	$3,12($20)
	lw	$6,0($fp)
	lw	$8,4($fp)
	addu	$4,$6,$22
	sw	$4,0($fp)
	lw	$2,4($20)
	lw	$9,56($sp)
	addu	$4,$2,$8
	sw	$4,4($fp)
	lw	$4,4($9)
	sw	$10,80($sp)
	lw	$10,0($9)
	subu	$6,$6,$22
	subu	$2,$2,$8
	sra	$7,$6,31
	sra	$9,$10,31
	sra	$5,$4,31
	mul	$18,$9,$2
	mul	$22,$5,$6
	mul	$19,$7,$10
	mul	$21,$5,$2
	multu	$10,$6
	move	$8,$10
	mfhi	$17
	multu	$2,$4
	lw	$11,688($sp)
	mfhi	$15
	multu	$2,$8
	lw	$10,56($sp)
	mfhi	$13
	multu	$6,$4
	sra	$3,$2,31
	addu	$10,$10,$11
	mfhi	$11
	mtlo	$18
	madd	$3,$8
	sw	$10,56($sp)
	mflo	$24
	addiu	$fp,$fp,-32
	sw	$24,304($sp)
	mul	$24,$7,$4
	mul	$7,$3,$4
	addu	$18,$24,$22
	mul	$22,$9,$6
	lw	$8,304($sp)
	addu	$6,$22,$19
	addu	$4,$7,$21
	addu	$13,$8,$13
	addu	$11,$18,$11
	addu	$17,$6,$17
	addu	$15,$4,$15
	addu	$2,$11,$13
	subu	$3,$17,$15
	sll	$2,$2,1
	sll	$3,$3,1
	sw	$2,0($20)
	sw	$3,4($20)
	bne	$23,$0,$L19
	addiu	$20,$20,-32

	lw	$10,156($sp)
	lw	$9,248($sp)
	subu	$2,$9,$10
	subu	$3,$2,$10
	subu	$4,$3,$10
	move	$25,$4
	subu	$4,$4,$10
	sw	$2,96($sp)
	sw	$3,92($sp)
	sw	$4,100($sp)
$L21:
	lw	$3,24($20)
	lw	$6,24($fp)
	lw	$4,28($fp)
	addu	$2,$6,$3
	sw	$2,24($fp)
	lw	$8,28($20)
	lw	$11,248($sp)
	addu	$2,$4,$8
	sw	$2,28($fp)
	lw	$10,0($11)
	subu	$6,$6,$3
	sra	$9,$10,31
	lw	$2,4($11)
	subu	$4,$4,$8
	move	$8,$10
	mul	$10,$9,$6
	sra	$5,$4,31
	sra	$3,$2,31
	mul	$19,$5,$8
	mul	$21,$3,$6
	mul	$24,$3,$4
	multu	$8,$4
	sw	$10,724($sp)
	lw	$11,708($sp)
	lw	$10,100($sp)
	mfhi	$17
	multu	$6,$2
	addu	$10,$10,$11
	lw	$11,700($sp)
	mfhi	$15
	lui	$18,%hi(sincos_lookup0)
	multu	$6,$8
	addu	$23,$11,$10
	addiu	$18,$18,%lo(sincos_lookup0)
	mfhi	$13
	sltu	$23,$18,$23
	multu	$4,$2
	lw	$18,724($sp)
	mfhi	$11
	sra	$7,$6,31
	mtlo	$18
	madd	$7,$8
	lw	$22,16($20)
	mflo	$18
	sw	$10,100($sp)
	sw	$18,308($sp)
	mul	$18,$5,$2
	mul	$5,$7,$2
	addu	$24,$18,$24