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# NEC V850 startup code
 
        .section .text
        .global _start
 
_start:
 
#if defined __v850e__ || defined __v850ea__
 
        movea   255,            r0,     r20
        mov     65535,          r21
        mov     hilo(_stack),   sp
        mov     hilo(__ep),     ep
        mov     hilo(__gp),     gp
        mov     hilo(__ctbp),   r6
        ldsr    r6,             ctbp
        mov     hilo(_edata),   r6
        mov     hilo(_end),     r7
.L0:
        st.w    r0,             0[r6]
        addi    4,              r6,     r6
        cmp     r7,             r6
        bl      .L0
.L1:
        jarl    ___main,        r31
        addi    -12,            sp,     sp
        mov     0,              r6
        mov     0,              r7
        mov     0,              r8
        jarl    _main,          r31
        mov     r10,            r6
        jarl    _exit,          r31
 
# else
        movea   255,            r0,     r20
        mov     r0,             r21
        ori     65535,          r0,     r21
        movhi   hi(_stack),     r0,     sp
        movea   lo(_stack),     sp,     sp
        movhi   hi(__ep),       r0,     ep
        movea   lo(__ep),       ep,     ep
        movhi   hi(__gp),       r0,     gp
        movea   lo(__gp),       gp,     gp
 
        /* Initialise the call table base pointer.
        We do this even though we are supposedly
        assembling this file for the v850 as this
        allows us to use the same binary for all
        versions of the v850 architecture.  */
 
        movhi   hi(__ctbp),     r0,     r6
        movea   lo(__ctbp),     r6,     r6
        ldsr    r6,             ctbp
 
        movhi   hi(_edata),     r0,     r6
        movea   lo(_edata),     r6,     r6
        movhi   hi(_end),       r0,     r7
        movea   lo(_end),       r7,     r7
.L0:
        st.b    r0,             0[r6]
        addi    1,              r6,     r6
        cmp     r7,             r6
        bl      .L0
.L1:
        jarl    ___main,        r31
        addi    -12,            sp,     sp
        mov     0,              r6
        mov     0,              r7
        mov     0,              r8
        jarl    _main,          r31
        mov     r10,            r6
        jarl    _exit,          r31
 
# endif
 
        .section .stack
_stack: .long   1

Line No.	Rev	Author	Line
1	39	lampret	`# NEC V850 startup code`
2
3			`.section .text`
4			`.global _start`
5
6			`_start:`
7
8	56	joel	`#if defined __v850e__ \|\| defined __v850ea__`
9	39	lampret
10			`movea 255, r0, r20`
11	56	joel	`mov 65535, r21`
12			`mov hilo(_stack), sp`
13			`mov hilo(__ep), ep`
14			`mov hilo(__gp), gp`
15			`mov hilo(__ctbp), r6`
16			`ldsr r6, ctbp`
17			`mov hilo(_edata), r6`
18			`mov hilo(_end), r7`
19			`.L0:`
20			`st.w r0, 0[r6]`
21			`addi 4, r6, r6`
22			`cmp r7, r6`
23			`bl .L0`
24			`.L1:`
25			`jarl ___main, r31`
26			`addi -12, sp, sp`
27			`mov 0, r6`
28			`mov 0, r7`
29			`mov 0, r8`
30			`jarl _main, r31`
31			`mov r10, r6`
32			`jarl _exit, r31`
33
34			`# else`
35			`movea 255, r0, r20`
36	39	lampret	`mov r0, r21`
37			`ori 65535, r0, r21`
38			`movhi hi(_stack), r0, sp`
39			`movea lo(_stack), sp, sp`
40			`movhi hi(__ep), r0, ep`
41			`movea lo(__ep), ep, ep`
42			`movhi hi(__gp), r0, gp`
43			`movea lo(__gp), gp, gp`
44	56	joel
45			`/* Initialise the call table base pointer.`
46			`We do this even though we are supposedly`
47			`assembling this file for the v850 as this`
48			`allows us to use the same binary for all`
49			`versions of the v850 architecture. */`
50
51			`movhi hi(__ctbp), r0, r6`
52			`movea lo(__ctbp), r6, r6`
53			`ldsr r6, ctbp`
54
55	39	lampret	`movhi hi(_edata), r0, r6`
56			`movea lo(_edata), r6, r6`
57			`movhi hi(_end), r0, r7`
58			`movea lo(_end), r7, r7`
59			`.L0:`
60			`st.b r0, 0[r6]`
61			`addi 1, r6, r6`
62			`cmp r7, r6`
63			`bl .L0`
64			`.L1:`
65			`jarl ___main, r31`
66			`addi -12, sp, sp`
67			`mov 0, r6`
68			`mov 0, r7`
69			`mov 0, r8`
70			`jarl _main, r31`
71			`mov r10, r6`
72			`jarl _exit, r31`
73
74	56	joel	`# endif`
75	39	lampret
76			`.section .stack`
77			`_stack: .long 1`

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[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [sys/] [sysnecv850/] [crt0.S] - Blame information for rev 1775