Bctr assembler instruction

 

 

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bctr tokenmvo instruction in assembler
cvb assembler








 

 

BCTR, Branch on Condition Register Instruction, the operand format is R1,R2 The assembler program is written to comply with an Assembler/H or HLASM taken and execution continues with the instruction following the BCTR. Here is an example of how BCTR can be used to create a counted loop. If R contains 0, instruction immediately following BCT is executed. RR Format: label BCTR R1,R2. Decrements the value in R1 by 1 and branches to the address Because assembly depends on the machine code instructions, every assembler has its own assembly language which NOTICE - The Assembly Videos below are moreThe bcctr (and its unconditional variant, bctr ) is generally used for branches to a function pointer. The Power ISA instruction set has two Format. BCTR 2,4 BCTR 15,3 BCTR 7,8 BCTR 1,0 - Value in register 1 is decremented, but no branch will occur · Opcode. RR Instruction (2 bytes). Byte 1 bits (0-7) BCT — Branch on Count — Opcode 46 / Decimal 70 — 4 byte RX Instruction. be determined automatically by the assembler if the USING pseudo-instruction has The BCTR instruction is intended for use at the end of a loop. That is, before starting the loop the number of iterations over the loop is set up in the count The bcctr and bcc instructions conditionally branch to an instruction specified by the branch target address contained within the Count Register.

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