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Instruction List (1)
Symbols in the Instruction List
Registers/Register Data
%rd, rd:
A general-purpose register (R0—R7) used as the destination register or its contents
%rs, rs:
A general-purpose register (R0—R7) used as the source register or its contents
%rb, rb:
A general-purpose register (R0—R7) that has stored a base address to be accessed in the
register indirect addressing mode or its contents
%sp, sp:
Stack pointer (SP) or its contents
%pc, pc:
Program counter (PC) or its contents
Memory/Addresses/Memory Data
[%rb], [%sp]:
Specification for register indirect addressing
[%rb]+, [%sp]+: Specification for register indirect addressing with post-increment
[%rb]-, [%sp]-: Specification for register indirect addressing with post-decrement
-[%rb], -[%sp]: Specification for register indirect addressing with pre-decrement
[%sp+immX]:
Specification for register indirect addressing with a displacement
[imm7]:
Specification for a memory address with an immediate data
B[XXX]:
An address specified with XXX, or the byte data stored in the address
W[XXX]:
A 16-bit address specified with XXX, or the word data stored in the address
A[XXX]:
A 32-bit address specified with XXX, or the 24-bit or 32-bit data stored in the address
Immediate
immX:
A X-bit unsigned immediate data
signX:
A X-bit signed immediate data
Symbol/Label
Symbol:
A symbol that points an address.
Label:
A branch destination label.
Notes
¥ The instruction list contains the basic instructions in the S1C17 instruction set and the extended instructions (s... and x..., except for xor).
¥ "Italic basic instructions" indicate that the upper compatible extended instructions are provided.
Bit Field
(X):
Bit X of data.
(X:Y):
A bit field from bit X to bit Y.
{X, Y···}: Indicates a bit (data) configuration.
Functions
←:
Indicates that the right item is loaded or set to the left item.
+:
Addition
-:
Subtraction
&:
AND
|:
OR
^:
XOR
!:
NOT
Flags
IL:
Interrupt level
IE:
Interrupt enable flag
C:
Carry flag
V:
Overflow flag
Z:
Zero flag
N:
Negative flag
—:
Not changed
↔:
Set (1), reset (0) or not changed
1:
Set (1)
0:
Reset (0)
D
:
Indicates that the instruction can be used as a delayed instruction.
—:
Indicates that the instruction cannot be used as a delayed instruction.
Assembly Programming
Reference
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