Move.b, Byte move (agu), Description – Freescale Semiconductor StarCore SC140 User Manual
Page 578: Operation assembler syntax
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SC140 DSP Core Reference Manual
MOVE.B
MOVE.B
Byte Move (AGU)
MOVE.B
Description
These operations move 8-bit data from memory to a data or address register, or from a register to memory.
Operation
Assembler Syntax
(aa)
↔ DR
MOVE.B (a16),DR {0
≤ a16 < 2
16
}
MOVE.B DR,(a16) {0
≤ a16 < 2
16
}
DR
→ (aa)
MOVE.B DR,(a32) {0
≤ a32 < 2
32
}
DR
→(Rn+s15)
MOVE.B DR,(Rn+s15) {–2
14
≤ s15 < 2
14
}
(ea)
↔ DR
MOVE.B (ea),DR
MOVE.B DR,(ea)
(SP+s15)
↔ DR
MOVE.B (SP+s15),DR {–2
14
≤ s15 < 2
14
}
MOVE.B DR,(SP+s15) {–2
14
≤ s15 < 2
14
}
MOVE.B (a16),DR
Reads a byte from a 16-bit absolute memory address, sign-extending it into a register.
MOVE.B DR,(a16)
Writes a byte to a 16-bit absolute memory address.
MOVE.B DR,(a32)
Writes a byte to a 32-bit absolute memory address.
MOVE.B DR,(Rn+s15)
Writes a byte to memory from a register. The effective memory address is obtained from an address
register with a signed 15-bit offset.
MOVE.B (ea),DR
Reads a byte from memory, sign-extending it into a register. The effective memory address is obtained
from an address register with an optional offset or post-increment.
SIGN EXTENSION
39
8
0
0
8
31
SIGN EXTENSION