malloc.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 10:57:41 2001

;--------------------------------------------------------
	.module malloc
	
.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 _free
	.globl _malloc
	.globl _init_dynamic_memory
	.globl _init_dynamic_memory_PARM_2
;--------------------------------------------------------
; 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)
_FIRST_MEMORY_HEADER_PTR:
	.ds 3
_init_dynamic_memory_PARM_2::
	.ds 2
_malloc_size_1_1::
	.ds 2
_malloc_new_header_1_1::
	.ds 3
_malloc_sloc0_1_0::
	.ds 2
_malloc_sloc1_1_0::
	.ds 3
_malloc_sloc2_1_0::
	.ds 3
_free_prev_header_1_1::
	.ds 3
;--------------------------------------------------------
; global & static initialisations
;--------------------------------------------------------
	.area GSINIT  (CODE)
	.area GSFINAL (CODE)
	.area GSINIT  (CODE)
;--------------------------------------------------------
; Home
;--------------------------------------------------------
	.area HOME	 (CODE)
	.area CSEG    (CODE)
;--------------------------------------------------------
; code
;--------------------------------------------------------
	.area CSEG    (CODE)
;	malloc.c 31
;	genFunction 
;	-----------------------------------------
;	 function init_dynamic_memory
;	-----------------------------------------
_init_dynamic_memory:
	ar2 = 0x02
	ar3 = 0x03
	ar4 = 0x04
	ar5 = 0x05
	ar6 = 0x06
	ar7 = 0x07
	ar0 = 0x00
	ar1 = 0x01
;	malloc.c 63
;	genReceive 
	mov	r2,dpl
	mov	r3,dph
	mov	r4,dpx
;	malloc.c 53
;	genIfx 
	mov	a,r2
	orl	a,r3
	orl	a,r4
;	genIfxJump 
; Peephole 109   removed ljmp by inverse jump logic
	jnz  00102$
00106$:
;	malloc.c 55
;	genPlus 
	inc	r2
	cjne	r2,#0x00,00107$
	inc	r3
	cjne	r3,#0x00,00107$
	inc	r4
00107$:
;	did genPlusIncr
;	malloc.c 56
;	genAssign 
	mov	dptr,#_init_dynamic_memory_PARM_2
;	genAssign: resultIsFar = FALSE
	movx	a,@dptr
	mov	r5,a
	inc	dptr
	movx	a,@dptr
	mov	r6,a
;	genMinus 
	dec	r5
	cjne	r5,#0xff,00108$
	dec	r6
00108$:
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	dptr,#_init_dynamic_memory_PARM_2
	mov	a,r5
	movx	@dptr,a
	inc	dptr
	mov	a,r6
	movx	@dptr,a
;	genLabel 
00102$:
;	malloc.c 58
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	dptr,#_FIRST_MEMORY_HEADER_PTR
	mov	a,r2
	movx	@dptr,a
	inc	dptr
	mov	a,r3
	movx	@dptr,a
	inc	dptr
	mov	a,r4
	movx	@dptr,a
;	malloc.c 60
;	genPlus 
	mov	dptr,#_init_dynamic_memory_PARM_2
	movx	a,@dptr
	add	a,r2
	mov	r5,a
	inc	dptr
	movx	a,@dptr
	addc	a,r3
	mov	r6,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r4
	mov	r7,a
;	genMinus 
	mov	a,r5
	add	a,#0xf8
	mov	r5,a
	mov	a,r6
	addc	a,#0xff
	mov	r6,a
	mov	a,r7
	addc	a,#0xff
	mov	r7,a
;	genPointerSet 
	mov	dpl,r2
	mov	dph,r3
	mov	dpx,r4
	mov	a,r5
	movx	@dptr,a
	inc	dptr
	mov	a,r6
	movx	@dptr,a
	inc	dptr
	mov	a,r7
	movx	@dptr,a
;	malloc.c 61
;	genPointerSet 
	mov	dpl,r5
	mov	dph,r6
	mov	dpx,r7
; Peephole 101   removed redundant mov
; Peephole 180   changed mov to clr
	clr  a
	movx @dptr,a
	inc  dptr
	movx @dptr,a
	inc	dptr
; Peephole 180   changed mov to clr
	clr  a
	movx	@dptr,a
;	malloc.c 62
;	genPlus 
	mov	a,#0x03
	add	a,r2
	mov	r5,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r3
	mov	r6,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r4
	mov	r7,a
;	genPointerSet 
	mov	dpl,r5
	mov	dph,r6
	mov	dpx,r7
; Peephole 101   removed redundant mov
; Peephole 180   changed mov to clr
	clr  a
	movx @dptr,a
	inc  dptr
	movx @dptr,a
	inc	dptr
; Peephole 180   changed mov to clr
	clr  a
	movx	@dptr,a
;	malloc.c 63
;	genPlus 
	mov	a,#0x06
	add	a,r2
	mov	r2,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r3
	mov	r3,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r4
	mov	r4,a
;	genPointerSet 
	mov	dpl,r2
	mov	dph,r3
	mov	dpx,r4
; Peephole 101   removed redundant mov
; Peephole 180   changed mov to clr
	clr  a
	movx @dptr,a
	inc  dptr
	movx @dptr,a
;	genLabel 
00103$:
;	genEndFunction 
	ret
;	malloc.c 66
;	genFunction 
;	-----------------------------------------
;	 function malloc
;	-----------------------------------------
_malloc:
;	malloc.c 0
;	genReceive 
	push	dph
	push	dpl
	mov	dptr,#_malloc_size_1_1
	pop	acc
	movx	@dptr,a
	pop	acc
	inc	dptr
	movx	@dptr,a
;	malloc.c 71
;	genCmpGt 
	mov	dptr,#_malloc_size_1_1
;	genCmp
	clr	c
;	genCmp #1: 1/0/0
	mov	a,#0xF7
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genCmp #1: 0/0/1
	mov	a,#0xFF
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	inc	dptr
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genIfxJump 
; Peephole 108   removed ljmp by inverse jump logic
	jnc  00102$
00122$:
;	genRet 
; Peephole 181a   used 24 bit load of dptr
	mov  dptr,#0x0000
	ljmp	00114$
;	genLabel 
00102$:
;	malloc.c 72
;	genPlus 
	mov	dptr,#_malloc_size_1_1
;	Swapped plus args.
	movx	a,@dptr
	add	a,#0x08
	movx	@dptr,a
	inc	dptr
	movx	a,@dptr
	addc	a,#0x00
	movx	@dptr,a
;	malloc.c 73
;	genAssign 
	mov	dptr,#_FIRST_MEMORY_HEADER_PTR
;	genAssign: resultIsFar = FALSE
	movx	a,@dptr
	mov	r4,a
	inc	dptr
	movx	a,@dptr
	mov	r5,a
	inc	dptr
	movx	a,@dptr
	mov	r6,a
;	genAssign 
;	genAssign: resultIsFar = TRUE
;	malloc.c 74
;	genLabel 
00108$:
;	malloc.c 84
;	genPointerGet 
;	genFarPointerGet
	mov	dpl,r4
	mov	dph,r5
	mov	dpx,r6
	movx	a,@dptr
	inc	dptr
	mov	r7,a
	movx	a,@dptr
	inc	dptr
	mov	r0,a
	movx	a,@dptr
	mov	r1,a
;	genCast 
	mov	ar2,r7
	mov	ar3,r0
;	malloc.c 85
;	genCast 
	mov	dptr,#_malloc_sloc0_1_0
	mov	a,r4
	movx	@dptr,a
	inc	dptr
	mov	a,r5
	movx	@dptr,a
;	genMinus 
	mov	dps, #0x01
	mov	dptr, #_malloc_sloc0_1_0
	dec	dps
	clr	c
	mov	a,r2
	xch	a, ap
	inc	dps
	movx	a,@dptr
	xch	a, ap
	subb	a,ap
	mov	r2,a
	mov	a,r3
	xch	a, ap
	inc	dptr
	movx	a,@dptr
	xch	a, ap
	subb	a,ap
	mov	r3,a
	mov	dps, #0x00
;	malloc.c 86
;	genPlus 
	mov	dptr,#_malloc_sloc1_1_0
	mov	a,#0x06
	add	a,r4
	movx	@dptr,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r5
	inc	dptr
	movx	@dptr,a
; Peephole 180   changed mov to clr
	clr  a
	addc	a,r6
	inc	dptr
	movx	@dptr,a
;	genPointerGet 
;	genFarPointerGet
	mov	dptr,#_malloc_sloc1_1_0
;	genFarPointerGet -- indirection special case.
	movx	a,@dptr
	push	acc
	inc	dptr
	movx	a,@dptr
	push	acc
	inc	dptr
	movx	a,@dptr
	mov	dpx,a
	pop	dph
	pop	dpl
	mov	dps, #0x01
	mov	dptr, #_malloc_sloc0_1_0
	dec	dps
	movx	a,@dptr
	inc	dptr
	inc	dps
	movx	@dptr,a
	dec	dps
	movx	a,@dptr
	inc	dps
	inc	dptr
	movx	@dptr,a
;	genMinus 
; Peephole 220a removed bogus DPS set
	mov	dps, #0x01
	mov	dptr, #_malloc_sloc0_1_0
	dec	dps
	clr	c
	mov	a,r2
	xch	a, ap
	inc	dps
	movx	a,@dptr
	xch	a, ap
	subb	a,ap
	mov	r2,a
	mov	a,r3
	xch	a, ap
	inc	dptr
	movx	a,@dptr
	xch	a, ap
	subb	a,ap
	mov	r3,a
	mov	dps, #0x00
;	genCmpLt 
	mov	dptr,#_malloc_size_1_1
;	genCmp
	clr	c
;	genCmp #1: 1/0/0
	mov	a,r2
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genCmp #1: 0/0/1
	mov	a,r3
;	genCmp #2
;	genCmp #4
;	genCmp #4.1
	xch	a, b
	inc	dptr
	movx	a,@dptr
	xch	a, b
	subb	a,b
;	genIfxJump 
	jc	00123$
	ljmp	00109$
00123$:
;	malloc.c 87
;	genAssign 
;	genAssign: resultIsFar = TRUE
	mov	ar4,r7
	mov	ar5,r0
	mov	ar6,r1
;	malloc.c 88
;	genPointerGet 
;	genFarPointerGet
	mov	dpl,r4
	mov	dph,r5
	mov	dpx,r6
	mov	dps, #0x01
	mov	dptr, #_malloc_sloc2_1_0
	dec	dps
	movx	a,@dptr
	inc	dptr
	inc	dps
	movx	@dptr,a
	dec	dps
	movx	a,@dptr
	inc	dptr
	inc	dps
	inc	dptr
	movx	@dptr,a
	dec	dps
	movx	a,@dptr
	inc	dps
	inc	dptr
	movx	@dptr,a
	mov	dps, #0x00
;	genIfx 
	mov	dptr,#_malloc_sloc2_1_0
	push	b
	movx	a,@dptr
	mov	b, a
	inc	dptr
	movx	a,@dptr
	orl	b,a
	inc	dptr
	movx	a,@dptr
	orl	b,a
	mov	a,b
	pop	b
;	genIfxJump 
	jz	00124$
	ljmp	00108$
00124$:
;	genRet 
; Peephole 181a   used 24 bit load of dptr
	mov  dptr,#0x0000
	ljmp	00114$