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# 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
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