_fsdiv.asm

很少见的源码公开的msc51和z80的c编译器。

;--------------------------------------------------------
; File Created by SDCC : FreeWare ANSI-C Compiler
; Version 2.3.0 Thu Sep 20 10:57:35 2001

;--------------------------------------------------------
	.module _fsdiv
	
.flat24 on		; 24 bit flat addressing
dpx = 0x93		; dpx register unknown to assembler
dps = 0x86		; dps register unknown to assembler
dpl1 = 0x84		; dpl1 register unknown to assembler
dph1 = 0x85		; dph1 register unknown to assembler
dpx1 = 0x95		; dpx1 register unknown to assembler
ap = 0x9C		; ap register unknown to assembler
;--------------------------------------------------------
; Public variables in this module
;--------------------------------------------------------
	.globl ___fsdiv_PARM_2
	.globl ___fsdiv
;--------------------------------------------------------
; special function registers
;--------------------------------------------------------
;--------------------------------------------------------
; special function bits 
;--------------------------------------------------------
;--------------------------------------------------------
; internal ram data
;--------------------------------------------------------
	.area DSEG    (DATA)
;--------------------------------------------------------
; overlayable items in internal ram 
;--------------------------------------------------------
	.area OSEG    (OVR,DATA)
;--------------------------------------------------------
; indirectly addressable internal ram data
;--------------------------------------------------------
	.area ISEG    (DATA)
;--------------------------------------------------------
; bit data
;--------------------------------------------------------
	.area BSEG    (BIT)
;--------------------------------------------------------
; external ram data
;--------------------------------------------------------
	.area XSEG    (XDATA)
___fsdiv_PARM_2::
	.ds 4
___fsdiv_fl1_1_1::
	.ds 4
___fsdiv_fl2_1_1::
	.ds 4
___fsdiv_result_1_1::
	.ds 4
___fsdiv_mask_1_1::
	.ds 4
___fsdiv_mant1_1_1::
	.ds 4
___fsdiv_mant2_1_1::
	.ds 4
___fsdiv_exp_1_1::
	.ds 2
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME	 (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
;	_fsdiv.c 73
;	genFunction 
;	-----------------------------------------
;	 function __fsdiv
;	-----------------------------------------
___fsdiv:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	_fsdiv.c 138
;	genReceive 
	mov	r2,dpl
	mov	r3,dph
	mov	r4,dpx
	mov	r5,b
;	_fsdiv.c 82
;	genPointerSet 
	mov	dptr,#___fsdiv_fl1_1_1
	mov	a,r2
	movx	@dptr,a
	inc	dptr
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
	inc	dptr
	mov	a,r5
	movx	@dptr,a
;	_fsdiv.c 83
;	genPointerSet 
	mov	dptr,#___fsdiv_fl2_1_1
	mov     dps, #0x01
	mov     dptr, #___fsdiv_PARM_2
	movx	a,@dptr
	dec	dps
	movx	@dptr,a
	inc	dptr
	inc	dps
	inc	dptr
	movx	a,@dptr
	dec	dps
	movx	@dptr,a
	inc	dptr
	inc	dps
	inc	dptr
	movx	a,@dptr
	dec	dps
	movx	@dptr,a
	inc	dptr
	inc	dps
	inc	dptr
	movx	a,@dptr
	dec	dps
	movx	@dptr,a
;	_fsdiv.c 86
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl1_1_1
	movx	a,@dptr
	inc	dptr
	mov	r2,a
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	mov	r5,a
;	genRightShift 
;	genRightShiftLiteral (23), size 4
;	genRightShiftLiteral wimping out
	mov	b,#0x18
	sjmp	00121$
00120$:
	clr	c
	mov	a,r5
	rrc	a
	mov	r5,a
	mov	a,r4
	rrc	a
	mov	r4,a
	mov	a,r3
	rrc	a
	mov	r3,a
	mov	a,r2
	rrc	a
	mov	r2,a
00121$:
	djnz	b,00120$
;	genAnd 
	mov	r3,#0x00
	mov	r4,#0x00
	mov	r5,#0x00
;	genCast 
	mov	dptr,#___fsdiv_exp_1_1
	mov	a,r2
	movx	@dptr,a
	inc	dptr
	mov	a,r3
	movx	@dptr,a
;	_fsdiv.c 87
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl2_1_1
	movx	a,@dptr
	inc	dptr
	mov	r2,a
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	mov	r5,a
;	genRightShift 
;	genRightShiftLiteral (23), size 4
;	genRightShiftLiteral wimping out
	mov	b,#0x18
	sjmp	00123$
00122$:
	clr	c
	mov	a,r5
	rrc	a
	mov	r5,a
	mov	a,r4
	rrc	a
	mov	r4,a
	mov	a,r3
	rrc	a
	mov	r3,a
	mov	a,r2
	rrc	a
	mov	r2,a
00123$:
	djnz	b,00122$
;	genAnd 
	mov	r3,#0x00
	mov	r4,#0x00
	mov	r5,#0x00
;	genCast 
	mov	dptr,#___fsdiv_exp_1_1
	movx	a,@dptr
	mov	r6,a
	inc	dptr
	movx	a,@dptr
	mov	r7,a
	movx	a,@dptr
	rlc	a
	subb	a,acc
	mov	r0,a
	mov	r1,a
;	genMinus 
	clr	c
	mov	a,r6
	subb	a,r2
	mov	r2,a
	mov	a,r7
	subb	a,r3
	mov	r3,a
	mov	a,r0
	subb	a,r4
	mov	r4,a
	mov	a,r1
	subb	a,r5
	mov	r5,a
;	genCast 
	mov	dptr,#___fsdiv_exp_1_1
	mov	a,r2
	movx	@dptr,a
	inc	dptr
	mov	a,r3
	movx	@dptr,a
;	_fsdiv.c 88
;	genPlus 
	mov	dptr,#___fsdiv_exp_1_1
;	Swapped plus args.
	movx	a,@dptr
	add	a,#0x7E
	movx	@dptr,a
	inc	dptr
	movx	a,@dptr
	addc	a,#0x00
	movx	@dptr,a
;	_fsdiv.c 91
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl1_1_1
	movx	a,@dptr
	inc	dptr
	mov	r2,a
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
;	genGetHbit 
; Peephole 105   removed redundant mov
	mov  r5,a
	rl	a
	anl	a,#0x01
	mov	r2,a
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl2_1_1
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	inc	dptr
	mov	r5,a
	movx	a,@dptr
;	genGetHbit 
; Peephole 105   removed redundant mov
	mov  r6,a
	rl	a
	anl	a,#0x01
;	genXor 
; Peephole 105   removed redundant mov
	mov  r3,a
	xrl	ar2,a
;	_fsdiv.c 94
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl2_1_1
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	inc	dptr
	mov	r5,a
	movx	a,@dptr
	mov	r6,a
;	genIfx 
	mov	a,r3
	orl	a,r4
	orl	a,r5
	orl	a,r6
;	genIfxJump 
; Peephole 109   removed ljmp by inverse jump logic
	jnz  00102$
00124$:
;	_fsdiv.c 96
;	genRet 
; Peephole 181   used 16 bit load of dptr
	mov  dptr,#0x0000
	mov	dpx,#0x80
	mov	b,#0xBF
	ljmp	00112$
;	genLabel 
00102$:
;	_fsdiv.c 99
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl1_1_1
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	inc	dptr
	mov	r5,a
	movx	a,@dptr
	mov	r6,a
;	genIfx 
	mov	a,r3
	orl	a,r4
	orl	a,r5
	orl	a,r6
;	genIfxJump 
; Peephole 109   removed ljmp by inverse jump logic
	jnz  00104$
00125$:
;	_fsdiv.c 100
;	genRet 
; Peephole 181a   used 24 bit load of dptr
	mov  dptr,#0x0000
	mov	b,#0x00
	ljmp	00112$
;	genLabel 
00104$:
;	_fsdiv.c 103
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl1_1_1
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	inc	dptr
	mov	r5,a
	movx	a,@dptr
	mov	r6,a
;	genAnd 
	anl	ar5,#0x7F
	mov	r6,#0x00
;	genOr 
	mov	dptr,#___fsdiv_mant1_1_1
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
;	better literal OR.
	mov	a,r5
	orl	a, #0x80
	inc	dptr
	movx	@dptr,a
	inc	dptr
	mov	a,r6
	movx	@dptr,a
;	_fsdiv.c 104
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#___fsdiv_fl2_1_1
	movx	a,@dptr
	inc	dptr
	mov	r3,a
	movx	a,@dptr
	inc	dptr
	mov	r4,a
	movx	a,@dptr
	inc	dptr
	mov	r5,a
	movx	a,@dptr
	mov	r6,a
;	genAnd 
	anl	ar5,#0x7F
	mov	r6,#0x00
;	genOr 
	mov	dptr,#___fsdiv_mant2_1_1
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
;	better literal OR.
	mov	a,r5
	orl	a, #0x80
	inc	dptr
	movx	@dptr,a
	inc	dptr
	mov	a,r6
	movx	@dptr,a
;	_fsdiv.c 107
;	genCmpLt 
	mov	dptr,#___fsdiv_mant2_1_1
	mov	dps, #0x01
	mov	dptr, #___fsdiv_mant1_1_1
	dec	dps
;	genCmp
	clr	c
;	genCmp #1: 3/1/0
	mov	dps, #0x01
	movx	a,@dptr
	mov	dps, #0x00
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genCmp #1: 2/1/1
	mov	dps, #0x01
	inc	dptr
	movx	a,@dptr
	mov	dps, #0x00
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	inc	dptr
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genCmp #1: 1/1/2
	mov	dps, #0x01
	inc	dptr
	movx	a,@dptr
	mov	dps, #0x00
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	inc	dptr
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genCmp #1: 0/1/3
	mov	dps, #0x01
	inc	dptr
	movx	a,@dptr
	mov	dps, #0x00
;	genCmp #2
;	genCmp #3
	xrl	a,#0x80
;	genCmp #3.2
	push	acc
	inc	dptr
	movx	a,@dptr
	mov	b,a
	xrl	b,#0x80
	pop	acc
	subb	a,b
;	genIfxJump 
	jc	00126$
	ljmp	00106$
00126$:
;	_fsdiv.c 109
;	genLeftShift 
;	genLeftShiftLiteral (1), size 4
;	genLeftShiftLiteral wimping out
	mov	b,#0x02
	mov	dptr,#___fsdiv_mant1_1_1
	movx	a,@dptr
	mov	r3,acc
	inc	dptr
	movx	a,@dptr
	mov	r4,acc
	inc	dptr
	movx	a,@dptr
	mov	r5,acc
	inc	dptr
	movx	a,@dptr
	mov	r6,acc
	sjmp	00128$
00127$:
	mov	a,r3
	add	a,acc
	mov	r3,a
	mov	a,r4
	rlc	a
	mov	r4,a
	mov	a,r5
	rlc	a
	mov	r5,a
	mov	a,r6
	rlc	a
	mov	r6,a
00128$:
	djnz	b,00127$
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	dptr,#___fsdiv_mant1_1_1
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
	inc	dptr
	mov	a,r5
	movx	@dptr,a
	inc	dptr
	mov	a,r6
	movx	@dptr,a
;	_fsdiv.c 110
;	genMinus 
	mov	dptr,#___fsdiv_exp_1_1
	movx	a,@dptr
	add	a,#0xff
	mov	r3,a
	inc	dptr
	movx	a,@dptr
	addc	a,#0xff
	mov	r4,a
;	genAssign