
85
Chapter 3 Functions
3.2 Functions
UIOBSZDC
Indirect subroutine call
[ Related Instructions ] JSR,JSRS
W , A
Jump SubRoutine Indirect
JSRI
190
[ Instruction Code/Number of Cycles ]
Page=
[ Syntax ]
JSRI.length src
JSRI
JSRI.A A1A0
JSRI.W R0
[ Description Example ]
[ Selectable src ]
[ Flag Change ]
src
R0L/R0 R0H/R1 R1L/R2 R1H/R3
A0/A0 A1/A1 [A0] [A1]
dsp:8[A0] dsp:8[A1] dsp:8[SB] dsp:8[FB]
dsp:16[A0] dsp:16[A1] dsp:16[SB] abs16
dsp:20[A0] dsp:20[A1] abs20
R2R0 R3R1 A1A0
src
R0L/R0 R0H/R1 R1L/R2 R1H/R3
A0/A0 A1/A1 [A0] [A1]
dsp:8[A0] dsp:8[A1] dsp:8[SB] dsp:8[FB]
dsp:16[A0] dsp:16[A1] dsp:16[SB] abs16
dsp:20[A0] dsp:20[A1] abs20
R2R0 R3R1 A1A0
Flag
Change
If you selected (.W) for the jump distance specifier (.length)
If you selected (.A) for the jump distance specifier (.length)
[ Function ]
*1 n denotes the number of instruction bytes.
• This instruction causes control to jump to a subroutine at the address indicated by
src
. If
src
is
memory, specify the address at which the low-order address is stored.
• If you selected (.W) for the jump distance specifier (.length), control jumps to a subroutine at the start
address of the instruction plus the address indicated by
src
(added including the sign bits). If
src
is
memory, the required memory capacity is 2 bytes.
• If
src
is memory when you selected (.A) for the jump distance specifier (.length), the required memory
capacity is 3 bytes.
[ Operation ]
When jump distance specifier (.length) is (.W) When jump distance specifier (.length) is (.A)
SP SP – 1 SP SP – 1
M(SP) (PC + n)H M(SP) (PC + n)H
SP SP – 2 SP SP – 2
M(SP) (PC + n)ML M(SP) (PC + n)H
PC PC src PC src
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