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Assembly Code Generation Techniques: Examples and Instructions

Learn about accumulator register usage and larger tile operations in assembly code generation with practical examples and detailed instructions. Explore constant stack offsets and conditional jumps to enhance your programming skills.

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Assembly Code Generation Techniques: Examples and Instructions

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  1. CS410 Chapter 9 Assembly Code Generation

  2. Slide 9-87: Accumulator Register • 3 + 4 addi $t1, $zero, 3 addi $ACC, $t1, 4

  3. Slide 9-90: Accumulator Register • memory (FP – 12) lw $ACC, -12($FP)

  4. Slide 9-100: Accumulator Register • move [memory(FP), 4] addi $ACC, $zero, 4 sw $ACC, 0($FP)

  5. Slide 9-108: Larger Tile Example • move[memory(FP-4), 7] addi $ACC, $zero, 7 sw $ACC, -4($FP)

  6. Slide 9-118: Larger Tile Example • move[memory(r2-x), r1] addi $ACC, $zero, r1 sw $ACC, -x($r2)

  7. Slide 9-131: Larger Tiles: conditional jump • CondJump(“jumplab”) if (3 == 4); addi $ACC, $zero, 3 addi $t1, $zero, 4 beq $t1, $ACC, truelab1 addi $ACC, $zero, 0 j endlab1 truelab1: addi $ACC, $zero, 1 endlab1: bgtz $ACC, jumplab

  8. Slide 9-146: Constant Stack Offsets • Figure 9.2 (p241): x = 9-(8-(7-6)) addi $ACC, $zero, 9 addi $t1, $zero, 8 addi $t2, $zero, 7 addi $t3, $zero, 6 sub $t3, $t2, $t3 sub $t1, $t1, $t3 sub $ACC, $ACC, $t1

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