Computer Architecture

Consider the 2-issue VLIW hardware discussed in class. For each question, a pair-of-a-pair (a quatrain? a square?) of SRC instructions are given in program (standard) order. This is the exact same order we saw in class. Determine the behavior of the system with regards to the displayed operations.

1. Left Instruction Right Instruction

 or   r12, r13, r6neg r20, r8

 sub r5, r14, r19ld    r7, 200(r14)

2. Left Instruction	Right Instruction
	brl, r8, r1, r25	add r4, r29, r2
	not r22, r9	or   r10, r7, r13
3. Left Instruction Right Instruction   nop nop   nop nop 4. Left InstructionRight Instruction  sub r10, r18, r15ld   r15, 312(r20)  add r3, r8, r19add r6, r16, r17 5. Left Instruction Right Instruction   st  r30, 400 add r8, r13, r25   sub r12, r30, r6 brz  r7, r22 6. Left Instruction Right Instruction   add r2, r3, r4 addi r7, r7, -1   ld r5, r2 addi r20, r3, 4

7.

Left Instruction	Right Instruction
	ldr r3, 100	addi r15, r16, #17
	ld r4, 100(r19)	brmi r20, r21

8. Left InstructionRight Instruction 

addi r3, r4, #5andi r11, r10, #255

 brpl r9, r21add r15, r18, r19

9. Left Instruction	Right Instruction
	addi r18, r2, #-40	and r13, r14, r15
	shc r17, r4, 16	sub r5, r6, r19

10. Left InstructionRight Instruction 

shr r22, r20, r5addi r8, r10, #-1

 neg  r2, r14add r21, r25, r4

a) The sequence of instructions creates a data hazard that will require forwarding

b) The sequence of instructions create a data hazard that will require stalling

c) The sequence includes an illegal instruction (such as an instruction in a pipeline that can't support it)

d) There are no problems with this sequence of instructions.