39 lines
884 B
Typst
39 lines
884 B
Typst
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#import "riscv.typ"
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#set page(width: auto, height: auto, margin: 1cm)
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#riscv.explain-instruction-encoding("lui x0, 0x12")
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#riscv.explain-instruction-encoding("add sp, a0, a1")
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#pagebreak()
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#riscv.riscv-to-bin(```
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0x00000300 main: jal ra, simple # call
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0x00000304 add s0, s1, s1
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0x0000051c simple: jalr x0, ra, 0 # return
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```)
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#pagebreak()
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#riscv.riscv-to-bin(```
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f1:
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addi sp, sp, -20 # make space on stack for 5 words
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sw a0, 16(sp)
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sw a1, 12(sp)
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sw ra, 8(sp) # save ra on stack
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sw s4, 4(sp)
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sw s5, 0(sp)
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jal ra, f2
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lw ra, 8(sp) # restore ra (and other regs) from stack
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addi sp, sp, 20 # deallocate stack space
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jalr zero, ra, 0
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# f2 (leaf-function) only uses s4 and calls no functions
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f2:
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addi sp, sp, -4 # make space on stack for 1 word
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sw s4, 0(sp)
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lw s4, 0(sp)
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addi sp, sp, 4 # deallocate stack space
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jalr zero, ra, 0
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```)
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