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53 lines
2.9 KiB
53 lines
2.9 KiB
# Function print
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lw a0, 0(sp) # Load arg
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beq a0, zero, print_6 # None is an illegal argument
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lw t0, 0(a0) # Get type tag of arg
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li t1, 1 # Load type tag of `int`
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beq t0, t1, print_7 # Go to print(int)
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li t1, 3 # Load type tag of `str`
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beq t0, t1, print_8 # Go to print(str)
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li t1, 2 # Load type tag of `bool`
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beq t0, t1, print_9 # Go to print(bool)
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print_6: # Invalid argument
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li a0, 1 # Exit code for: Invalid argument
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la a1, STRING["Invalid argument"] # Load error message as str
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addi a1, a1, @.__str__ # Load address of attribute __str__
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j abort # Abort
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# Printing bools
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print_9: # Print bool object in A0
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lw a0, @.__bool__(a0) # Load attribute __bool__
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beq a0, zero, print_10 # Go to: print(False)
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la a0, STRING["True"] # String representation: True
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j print_8 # Go to: print(str)
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print_10: # Print False object in A0
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la a0, STRING["False"] # String representation: False
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j print_8 # Go to: print(str)
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# Printing strs.
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print_8: # Print str object in A0
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addi a1, a0, @.__str__ # Load address of attribute __str__
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j print_11 # Print the null-terminated string is now in A1
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mv a0, zero # Load None
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j print_5 # Go to return
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print_11: # Print null-terminated string in A1
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li a0, @print_string # Code for ecall: print_string
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ecall # Print string
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li a1, 10 # Load newline character
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li a0, @print_char # Code for ecall: print_char
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ecall # Print character
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j print_5 # Go to return
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# Printing ints.
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print_7: # Print int object in A0
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lw a1, @.__int__(a0) # Load attribute __int__
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li a0, @print_int # Code for ecall: print_int
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ecall # Print integer
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li a1, 10 # Load newline character
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li a0, 11 # Code for ecall: print_char
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ecall # Print character
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print_5: # End of function
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mv a0, zero # Load None
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jr ra # Return to caller
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