Disassembly of section .text.__udelay:

00000000 <__udelay>:
   0:	e92d 4cf0 	stmdb	sp!, {r4, r5, r6, r7, sl, fp, lr}
   4:	ee1e 1f10 	mrc	15, 0, r1, cr14, cr0, {0}
   8:	f244 243f 	movw	r4, #16959	; 0x423f
   c:	f2c0 040f 	movt	r4, #15
  10:	2500      	movs	r5, #0
  12:	f243 4edb 	movw	lr, #13531	; 0x34db
  16:	fbe1 4500 	umlal	r4, r5, r1, r0
  1a:	f2cd 7eb6 	movt	lr, #55222	; 0xd7b6
  1e:	f64d 6c82 	movw	ip, #56962	; 0xde82
  22:	f2c4 3c1b 	movt	ip, #17179	; 0x431b
  26:	2300      	movs	r3, #0
  28:	f64d 6082 	movw	r0, #56962	; 0xde82
  2c:	f2c4 301b 	movt	r0, #17179	; 0x431b
  30:	fba4 670e 	umull	r6, r7, r4, lr
  34:	4629      	mov	r1, r5
  36:	2500      	movs	r5, #0
  38:	fba4 ab0c 	umull	sl, fp, r4, ip
  3c:	fb0e 7205 	mla	r2, lr, r5, r7
  40:	fb0c bb05 	mla	fp, ip, r5, fp
  44:	2500      	movs	r5, #0
  46:	fbee 2301 	umlal	r2, r3, lr, r1
  4a:	eb1a 0a02 	adds.w	sl, sl, r2
  4e:	eb4b 0b03 	adc.w	fp, fp, r3
  52:	459b      	cmp	fp, r3
  54:	465c      	mov	r4, fp
  56:	bf08      	it	eq
  58:	4592      	cmpeq	sl, r2
  5a:	fbe0 4501 	umlal	r4, r5, r0, r1
  5e:	f04f 0200 	mov.w	r2, #0
  62:	bf2c      	ite	cs
  64:	2300      	movcs	r3, #0
  66:	2301      	movcc	r3, #1
  68:	4620      	mov	r0, r4
  6a:	4629      	mov	r1, r5
  6c:	ec55 4f0e 	mrrc	15, 0, r4, r5, cr14
  70:	1812      	adds	r2, r2, r0
  72:	f8c9 40a4 	str.w	r4, [r9, #164]	; 0xa4
  76:	414b      	adcs	r3, r1
  78:	f8c9 50a0 	str.w	r5, [r9, #160]	; 0xa0
  7c:	0c92      	lsrs	r2, r2, #18
  7e:	4649      	mov	r1, r9
  80:	ea42 3283 	orr.w	r2, r2, r3, lsl #14
  84:	18a4      	adds	r4, r4, r2
  86:	f145 0500 	adc.w	r5, r5, #0
  8a:	ec53 2f0e 	mrrc	15, 0, r2, r3, cr14
  8e:	42ab      	cmp	r3, r5
  90:	f8c1 20a4 	str.w	r2, [r1, #164]	; 0xa4
  94:	bf08      	it	eq
  96:	42a2      	cmpeq	r2, r4
  98:	f8c1 30a0 	str.w	r3, [r1, #160]	; 0xa0
  9c:	d3f5      	bcc.n	8a <__udelay+0x8a>
  9e:	e8bd 8cf0 	ldmia.w	sp!, {r4, r5, r6, r7, sl, fp, pc}
  a2:	bf00      	nop