Freescale Semiconductor StarCore SC140 - Manual (Page 652)

A-338 SC140 DSP Core Reference Manual
NOT.W
NOT.W
Binary Inversion of a 16-Bit Operand
NOT.W
in Memory (BMU)
Description
These operations read from memory, invert the retrieved value, and write the new value back to the same
memory address, resulting in two memory accesses.
The absolute addresses, offsets, and address register values must be word-aligned.
Status and Conditions that Affect Instruction
Status and Conditions Changed by Instruction
None.
Operation Assembler Syntax
~(R)
→ (R)
NOT.W (Rn)
~(SP–u5)
→ (SP–u5)
NOT.W (SP–u5) {0
≤ u5 < 64,W]
~(SP+s16)
→ (SP+s16)
NOT.W (SP+s16) {–2 15 ≤ s16 < 2 15 ,W}
~(a16)
→ (a16)
NOT.W (a16) {0
≤ a16 < 2
16 ,W}
NOT.W (Rn)
Replaces the contents of a memory address pointed to by an address register (Rn) with its complement.
This instruction is assembler-mapped to BMCHG.W #$FFFF,(Rn). The full mask is enabled.
NOT.W (SP–u5)
Replaces the contents of a memory address pointed to by the active stack pointer (SP) minus a 5-bit
unsigned immediate value with its complement. This instruction is assembler-mapped to
BMCHG.W #$FFFF,(SP–u5). The full mask is enabled.
NOT.W (SP+s16)
Replaces the contents of a memory address pointed to by the active stack pointer (SP) offset by a 16-bit
signed immediate value with its complement. This instruction is assembler-mapped to
BMCHG.W #$FFFF,(SP+s16). The full mask is enabled.
NOT.W (a16)
Replaces the contents of a memory address pointed to by a 16-bit unsigned absolute address with its
complement. This instruction is assembler-mapped to BMCHG.W #$FFFF,(a16). The full mask is enabled.
Register Address Bit Name Description
SR[18] EXP Determines which stack pointer is used when the stack pointer is an
operand. Otherwise, the instruction is not affected by SR.