mirror of
https://gitlab.com/brendanhaines/cpu.git
synced 2024-11-09 21:14:57 -07:00
93 lines
2.0 KiB
ArmAsm
93 lines
2.0 KiB
ArmAsm
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.global _start
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.global addathing
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.text
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_start:
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addi a0, zero, 0x134
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nop
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nop
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nop
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nop
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nop
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call addathing
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nop
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nop
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nop
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nop
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nop
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addi a1, zero, 0x163 # a1 = a0 + 0x29
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done:
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la x31, failcode # x30 =
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addi x30, x0, 0xff # x31 = 0x000000ff
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slli x30, x30, 8 # x31 = 0x0000ff00
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addi x30, x30, 0xff # x31 = 0x0000ffff
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slli x30, x30, 8 # x31 = 0x00ffff00
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addi x30, x30, 0xff # x31 = 0x00ffffff
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slli x30, x30, 8 # x31 = 0xffffff00
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addi x30, x30, 0xff # x31 = 0xffffffff
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# slli x30, x30, 1 # x31 = 0xfffffffe // this should cause a fail
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nop
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nop
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nop
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nop
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nop
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sw x30, 0(x31) # failcode = 0xffffffff
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nop
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nop
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nop
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nop
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nop
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lui x30, 0x10101 # x30 = 0x10101000
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addi x30, x30, 0x010 # x30 = 0x10101010
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# set registers to known values before loop
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addi x2, x0, 1 # x2 = 1
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addi x3, x0, 1 # x3 = 1
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addi x4, x0, 1 # x4 = 1
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addi x5, x0, 1 # x5 = 1
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addi x6, x0, 1 # x6 = 1
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fail:
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la x31, failcode # x31 =
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nop
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nop
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nop
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nop
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nop
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sw x30, 0(x31) # failcode = test number
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nop
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nop
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nop
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nop
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nop
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# set some registers to make it blatantly obvious an error occurred
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addi x1, x0, 0x7ff # x1 = 0x1111
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addi x2, x0, 0x7ff # x1 = 0x1111
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addi x3, x0, 0x7ff # x1 = 0x1111
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addi x4, x0, 0x7ff # x1 = 0x1111
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addi x5, x0, 0x7ff # x1 = 0x1111
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addi x6, x0, 0x7ff # x1 = 0x1111
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addi x7, x0, 0x7ff # x1 = 0x1111
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addi x8, x0, 0x7ff # x1 = 0x1111
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addi x9, x0, 0x7ff # x1 = 0x1111
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j fail # loop forever
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nop
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nop
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nop
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nop
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nop
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nop
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.data
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failcode:
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.word 0x00000000
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.bss
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