Microcontroller User's Manual

MOTOROLA Chapter 2. ColdFire Core 2-29
ColdFire Instruction Set Architecture Enhancements
BITREV Bit Reverse Register BITREV
(Supported Starting with ISA A+)
Operation: Bit Reversed Dx → Dx
Assembler Syntax: BITREV.L Dx
Attributes: Size = longword
The contents of the destination data register are bit-reversed; that is, new Dx[31] = old
Dx[0], new Dx[30] = old Dx[1], ..., new Dx[0] = old Dx[31].
Condition Codes: Not affected
Instruction Field:
• Register field—Specifies the destination data register, Dx.
Instruction
Format:
1514131211109876543210
0000000011000 Register, Dx
BITREV V2, V3 Core (ISA_A) V4 Core (ISA_B) V2 Core (ISA_A+)
Opcode present No No Yes