Add.a %Sp, Imm7 - Epson S1C17 Series Manual

7 DETAILS OF INSTRUCTIONS

add.a %sp, imm7

Function 24-bit addition
Standard)
Extension 1) sp(23:0) ← sp(23:0) + imm20(zero extended)
Extension 2) sp(23:0) ← sp(23:0) + imm24
15 14 13 12 11 10
Code
0 1 1
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IL IE C
Flag
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– – –
Mode Src: Immediate data (unsigned)
Dst: Register direct %sp
CLK One cycle
Description (1) Standard
add.a
The 7-bit immediate imm7 is added to the stack pointer SP after being zero-extended.
(2) Extension 1
ext
add.a
The 20-bit immediate imm20 is added to the stack pointer SP after being zero-extended.
(3) Extension 2
ext
ext
add.a
The 24-bit immediate imm24 is added to the stack pointer SP.
(4) Delayed slot instruction
This instruction may be executed as a delayed slot instruction by writing it directly after
a branch instruction with the "d" bit. In this case, extension of the immediate by the ext
instruction cannot be performed.
Example (1) add.a
(2) ext
add.a
Caution The 2 low-order bits of the addition results are always loaded to the SP as 0.
7-10
sp(23:0) ← sp(23:0) + imm7(zero extended)
9 8 7 6
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0 0 1 0 0 0
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V Z N
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– – –
; sp ← sp + imm7
%sp,imm7
imm13 ; = imm20(19:7)
; sp ← sp + imm20, imm7 = imm20(6:0)
%sp,imm7
imm4 ; imm4(3:0) = imm24(23:20)
imm13 ; = imm24(19:7)
; sp ← sp + imm24, imm7 = imm24(6:0)
%sp,imm7
%sp,0x7c ; sp = sp + 0x7c
0x1fff
%sp,0x7c ; sp = sp + 0xffffc
Seiko Epson Corporation
5 4 3 2 1 0
imm7
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S1C17 CORE MANUAL
(REV. 1.2)