;--------------------------------------------------------
; File Created by SDCC : free open source ANSI-C Compiler
; Version 2.7.0 #4818 (Mar 17 2010)
; This file generated Wed Mar 17 20:22:10 2010
;--------------------------------------------------------
	.module sqrtf
	.optsdcc -mmcs51 --model-small
	
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
	.globl _sqrtf
;--------------------------------------------------------
; special function registers
;--------------------------------------------------------
	.area RSEG    (DATA)
;--------------------------------------------------------
; special function bits
;--------------------------------------------------------
	.area RSEG    (DATA)
;--------------------------------------------------------
; overlayable register banks
;--------------------------------------------------------
	.area REG_BANK_0	(REL,OVR,DATA)
	.ds 8
;--------------------------------------------------------
; internal ram data
;--------------------------------------------------------
	.area DSEG    (DATA)
;--------------------------------------------------------
; overlayable items in internal ram 
;--------------------------------------------------------
	.area OSEG    (OVR,DATA)
;--------------------------------------------------------
; indirectly addressable internal ram data
;--------------------------------------------------------
	.area ISEG    (DATA)
;--------------------------------------------------------
; absolute internal ram data
;--------------------------------------------------------
	.area IABS    (ABS,DATA)
	.area IABS    (ABS,DATA)
;--------------------------------------------------------
; bit data
;--------------------------------------------------------
	.area BSEG    (BIT)
;--------------------------------------------------------
; paged external ram data
;--------------------------------------------------------
	.area PSEG    (PAG,XDATA)
;--------------------------------------------------------
; external ram data
;--------------------------------------------------------
	.area XSEG    (XDATA)
;--------------------------------------------------------
; absolute external ram data
;--------------------------------------------------------
	.area XABS    (ABS,XDATA)
;--------------------------------------------------------
; external initialized ram data
;--------------------------------------------------------
	.area XISEG   (XDATA)
	.area HOME    (CODE)
	.area GSINIT0 (CODE)
	.area GSINIT1 (CODE)
	.area GSINIT2 (CODE)
	.area GSINIT3 (CODE)
	.area GSINIT4 (CODE)
	.area GSINIT5 (CODE)
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area HOME    (CODE)
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME    (CODE)
	.area HOME    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
;------------------------------------------------------------
;Allocation info for local variables in function 'sqrtf'
;------------------------------------------------------------
;x                         Allocated to registers r2 r3 r4 r5 
;f                         Allocated to stack - offset 1
;y                         Allocated to stack - offset 5
;n                         Allocated to stack - offset 9
;sloc0                     Allocated to stack - offset 11
;------------------------------------------------------------
;	sqrtf.c:27: float sqrtf(const float x) _FLOAT_FUNC_REENTRANT
;	-----------------------------------------
;	 function sqrtf
;	-----------------------------------------
_sqrtf:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
	push	_bp
	mov	_bp,sp
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
	mov	a,sp
	add	a,#0x0e
	mov	sp,a
;	sqrtf.c:32: if (x==0.0) return x;
	mov	a,r2
	orl	a,r3
	orl	a,r4
	orl	a,r5
	jnz	00107$
	mov	dpl,r2
	mov	dph,r3
	mov	b,r4
	mov	a,r5
	ljmp	00111$
00107$:
;	sqrtf.c:33: else if (x==1.0) return 1.0;
	push	ar2
	push	ar3
	push	ar4
	push	ar5
	clr	a
	push	acc
	push	acc
	mov	a,#0x80
	push	acc
	mov	a,#0x3F
	push	acc
	mov	dpl,r2
	mov	dph,r3
	mov	b,r4
	mov	a,r5
	lcall	___fseq
	mov	r6,dpl
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	pop	ar5
	pop	ar4
	pop	ar3
	pop	ar2
	mov	a,r6
	jz	00104$
	mov	dptr,#0x0000
	mov	b,#0x80
	mov	a,#0x3F
	ljmp	00111$
00104$:
;	sqrtf.c:34: else if (x<0.0)
	push	ar2
	push	ar3
	push	ar4
	push	ar5
	clr	a
	push	acc
	push	acc
	push	acc
	push	acc
	mov	dpl,r2
	mov	dph,r3
	mov	b,r4
	mov	a,r5
	lcall	___fslt
	mov	r6,dpl
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	pop	ar5
	pop	ar4
	pop	ar3
	pop	ar2
	mov	a,r6
	jz	00108$
;	sqrtf.c:36: errno=EDOM;
	mov	_errno,#0x21
	clr	a
	mov	(_errno + 1),a
;	sqrtf.c:37: return 0.0;
	mov	dptr,#(0x00&0x00ff)
	clr	a
	mov	b,a
	ljmp	00111$
00108$:
;	sqrtf.c:39: f=frexpf(x, &n);
	mov	a,_bp
	add	a,#0x09
	mov	r6,a
	mov	_frexpf_PARM_2,r6
	mov	(_frexpf_PARM_2 + 1),#0x00
	mov	(_frexpf_PARM_2 + 2),#0x40
	mov	dpl,r2
	mov	dph,r3
	mov	b,r4
	mov	a,r5
	lcall	_frexpf
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
	mov	r0,_bp
	inc	r0
	mov	@r0,ar2
	inc	r0
	mov	@r0,ar3
	inc	r0
	mov	@r0,ar4
	inc	r0
	mov	@r0,ar5
;	sqrtf.c:40: y=0.41731+0.59016*f; /*Educated guess*/
	mov	r0,_bp
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	mov	dptr,#0x14BA
	mov	b,#0x17
	mov	a,#0x3F
	lcall	___fsmul
	mov	r6,dpl
	mov	r7,dph
	mov	r2,b
	mov	r3,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	mov	a,#0xA8
	push	acc
	mov	a,#0xA9
	push	acc
	mov	a,#0xD5
	push	acc
	mov	a,#0x3E
	push	acc
	mov	dpl,r6
	mov	dph,r7
	mov	b,r2
	mov	a,r3
	lcall	___fsadd
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	@r0,ar2
	inc	r0
	mov	@r0,ar3
	inc	r0
	mov	@r0,ar4
	inc	r0
	mov	@r0,ar5
;	sqrtf.c:42: y+=f/y;
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	mov	r0,_bp
	inc	r0
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	inc	r0
	mov	b,@r0
	inc	r0
	mov	a,@r0
	lcall	___fsdiv
	mov	r6,dpl
	mov	r7,dph
	mov	r2,b
	mov	r3,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	push	ar6
	push	ar7
	push	ar2
	push	ar3
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	inc	r0
	mov	b,@r0
	inc	r0
	mov	a,@r0
	lcall	___fsadd
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	@r0,ar2
	inc	r0
	mov	@r0,ar3
	inc	r0
	mov	@r0,ar4
	inc	r0
	mov	@r0,ar5
;	sqrtf.c:43: y=ldexpf(y, -2) + f/y; /*Faster version of 0.25 * y + f/y*/
	mov	_ldexpf_PARM_2,#0xFE
	mov	(_ldexpf_PARM_2 + 1),#0xFF
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	inc	r0
	mov	b,@r0
	inc	r0
	mov	a,@r0
	lcall	_ldexpf
	push	acc
	mov	a,_bp
	add	a,#0x0b
	mov	r0,a
	pop	acc
	mov	@r0,dpl
	inc	r0
	mov	@r0,dph
	inc	r0
	mov	@r0,b
	inc	r0
	mov	@r0,a
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	mov	r0,_bp
	inc	r0
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	inc	r0
	mov	b,@r0
	inc	r0
	mov	a,@r0
	lcall	___fsdiv
	mov	r6,dpl
	mov	r7,dph
	mov	r2,b
	mov	r3,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	push	ar6
	push	ar7
	push	ar2
	push	ar3
	mov	a,_bp
	add	a,#0x0b
	mov	r0,a
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	inc	r0
	mov	b,@r0
	inc	r0
	mov	a,@r0
	lcall	___fsadd
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	@r0,ar2
	inc	r0
	mov	@r0,ar3
	inc	r0
	mov	@r0,ar4
	inc	r0
	mov	@r0,ar5
;	sqrtf.c:45: if (n&1)
	mov	a,_bp
	add	a,#0x09
	mov	r0,a
	mov	a,@r0
	jnb	acc.0,00110$
;	sqrtf.c:47: y*=0.7071067812;
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	inc	r0
	mov	a,@r0
	push	acc
	mov	dptr,#0x04F3
	mov	b,#0x35
	mov	a,#0x3F
	lcall	___fsmul
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
	mov	a,sp
	add	a,#0xfc
	mov	sp,a
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	@r0,ar2
	inc	r0
	mov	@r0,ar3
	inc	r0
	mov	@r0,ar4
	inc	r0
	mov	@r0,ar5
;	sqrtf.c:48: ++n;
	mov	a,_bp
	add	a,#0x09
	mov	r0,a
	inc	@r0
	cjne	@r0,#0x00,00121$
	inc	r0
	inc	@r0
00121$:
00110$:
;	sqrtf.c:50: return ldexpf(y, n/2);
	mov	__divsint_PARM_2,#0x02
	clr	a
	mov	(__divsint_PARM_2 + 1),a
	mov	a,_bp
	add	a,#0x09
	mov	r0,a
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	lcall	__divsint
	mov	_ldexpf_PARM_2,dpl
	mov	(_ldexpf_PARM_2 + 1),dph
	mov	a,_bp
	add	a,#0x05
	mov	r0,a
	mov	dpl,@r0
	inc	r0
	mov	dph,@r0
	inc	r0
	mov	b,@r0
	inc	r0
	mov	a,@r0
	lcall	_ldexpf
	mov	r2,dpl
	mov	r3,dph
	mov	r4,b
	mov	r5,a
00111$:
	mov	sp,_bp
	pop	_bp
	ret
	.area CSEG    (CODE)
	.area CONST   (CODE)
	.area XINIT   (CODE)
	.area CABS    (ABS,CODE)
