URL https://opencores.org/ocsvn/or1k/or1k/trunk

Subversion Repositories or1k

[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [machine/] [fr30/] [setjmp.S] - Blame information for rev 1774

Go to most recent revision | Details | Compare with Previous | View Log


# setjmp/longjmp for FR30.  The jmpbuf looks like this:
#
# Register      jmpbuf offset
# R8            0x00
# R9            0x04
# R10           0x08
# R11           0x0c
# R12           0x10
# R13           0x14
# R14 (FP)      0x18
# R15 (SP)      0x1c
# RP            0x20
 
.macro save reg
        st      \reg,@r4
        add     #4,r4
.endm
 
.macro restore reg
        ld      @r4,\reg
        add     #4,r4
.endm
 
 
        .text
        .global setjmp
setjmp:
        save    r8
        save    r9
        save    r10
        save    r11
        save    r12
        save    r13
        save    r14
        save    r15
        mov     RP,r5
        st      r5,@r4
 
# Return 0 to caller.
        ldi:8   #0,r4
        ret
 
        .global longjmp
longjmp:
        restore r8
        restore r9
        restore r10
        restore r11
        restore r12
        restore r13
        restore r14
        restore r15
        ld      @r4,r4
        mov     r4,RP
 
# If caller attempted to return 0, return 1 instead.
 
        mov     r5,r4
        or      r4,r4
        bne     1f
        ldi:8   #1,r4
    1:
        ret
 

Line No.	Rev	Author	Line
1	56	joel	`# setjmp/longjmp for FR30. The jmpbuf looks like this:`
2			`#`
3			`# Register jmpbuf offset`
4			`# R8 0x00`
5			`# R9 0x04`
6			`# R10 0x08`
7			`# R11 0x0c`
8			`# R12 0x10`
9			`# R13 0x14`
10			`# R14 (FP) 0x18`
11			`# R15 (SP) 0x1c`
12			`# RP 0x20`
13
14			`.macro save reg`
15			`st \reg,@r4`
16			`add #4,r4`
17			`.endm`
18
19			`.macro restore reg`
20			`ld @r4,\reg`
21			`add #4,r4`
22			`.endm`
23
24
25			`.text`
26			`.global setjmp`
27			`setjmp:`
28			`save r8`
29			`save r9`
30			`save r10`
31			`save r11`
32			`save r12`
33			`save r13`
34			`save r14`
35			`save r15`
36			`mov RP,r5`
37			`st r5,@r4`
38
39			`# Return 0 to caller.`
40			`ldi:8 #0,r4`
41			`ret`
42
43			`.global longjmp`
44			`longjmp:`
45			`restore r8`
46			`restore r9`
47			`restore r10`
48			`restore r11`
49			`restore r12`
50			`restore r13`
51			`restore r14`
52			`restore r15`
53			`ld @r4,r4`
54			`mov r4,RP`
55
56			`# If caller attempted to return 0, return 1 instead.`
57
58			`mov r5,r4`
59			`or r4,r4`
60			`bne 1f`
61			`ldi:8 #1,r4`
62			`1:`
63			`ret`
64

Browse

Tools

Subversion Repositories or1k

[/] [or1k/] [trunk/] [newlib/] [newlib/] [libc/] [machine/] [fr30/] [setjmp.S] - Blame information for rev 1774