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39 lines
809 B
ArmAsm
39 lines
809 B
ArmAsm
// sumtest.S
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// David_Harris@hmc.edu 24 December 2021
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.global rvtest_entry_point
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rvtest_entry_point:
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la sp, topofstack # Initialize stack pointer
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la t0, N # get address of N in data
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ld a0, 0(t0) # load N
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jal sum # call sum(N)
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la t0, begin_signature # address of signature
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sd a0, 0(t0) # store sum(N) in signature
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write_tohost:
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la t1, tohost
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li t0, 1 # 1 for success, 3 for failure
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sd t0, 0(t1) # send success code
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self_loop:
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j self_loop # wait
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.section .tohost
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tohost: # write to HTIF
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.dword 0
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fromhost:
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.dword 0
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.data
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N:
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.dword 4
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begin_signature:
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.fill 2,4,0xdeadbeef
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end_signature:
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# Initialize stack with room for 512 bytes
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.bss
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.space 512
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topofstack:
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