mirror of
https://github.com/Asraelite/littlebigcomputer.git
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109 lines
2.2 KiB
Text
109 lines
2.2 KiB
Text
li sp, stack
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j main
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main:
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sw x0, gpu_clear_screen(upper)
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li x6, 1
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li x7, 1
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sd x67, cursor_pos
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li a0, 6942069
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call print_number
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li x6, 1
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li x7, 7
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sd x67, cursor_pos
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li a0, 12345678
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call print_number
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wfi
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.eq gpu_clear_screen 0b01_0100_000000
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.eq gpu_move_cursor 0b01_0000_000000
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.eq gpu_print_char 0b01_0010_000000
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.eq gpu_show_buffer 0b01_0011_000000
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# void print_number(*void return: ra, int number: a0)
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.address 128
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print_number:
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push ra
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mv x0, a0
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li x2, 0
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li x4, 10000000
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.align 2
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print_number__bin_to_dec_loop:
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divu x3, x0, x4
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remu x0, x0, x4
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sw x3, print_number__result_string(x2)
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divui x4, x4, 10
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addi x2, x2, 1
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bnez x4, print_number__bin_to_dec_loop
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li x0, -1
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ld x67, cursor_pos
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print_number__skip_zeroes:
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addi x0, x0, 1
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lw x4, print_number__result_string(x0)
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beqz x4, print_number__skip_zeroes
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print_number__print_loop:
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lw x4, print_number__result_string(x0)
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bltz x4, print_number__end_print_loop
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sd x67, gpu_move_cursor(upper)
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slli x4, x4, 1
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ld x23, print_number__char_pixels(x4)
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addi x6, x6, 4
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addi x0, x0, 1
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sd x23, gpu_print_char(upper)
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b print_number__print_loop
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print_number__end_print_loop:
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sd x01, gpu_show_buffer(upper) # gpu show buffer
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sw x6, (cursor_pos + 0)
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pop ra
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j ra
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print_number__char_pixels:
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.data 0b111000_101000_101000_101000 # 0
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.data 0b111000_000000_000000_000000
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.data 0b001000_001000_001000_001000 # 1
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.data 0b001000_000000_000000_000000
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.data 0b111000_001000_111000_100000 # 2
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.data 0b111000_000000_000000_000000
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.data 0b111000_001000_111000_001000 # 3
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.data 0b111000_000000_000000_000000
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.data 0b101000_101000_111000_001000 # 4
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.data 0b001000_000000_000000_000000
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.data 0b111000_100000_111000_001000 # 5
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.data 0b111000_000000_000000_000000
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.data 0b111000_100000_111000_101000 # 6
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.data 0b111000_000000_000000_000000
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.data 0b111000_001000_001000_010000 # 7
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.data 0b010000_000000_000000_000000
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.data 0b111000_101000_111000_101000 # 8
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.data 0b111000_000000_000000_000000
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.data 0b111000_101000_111000_001000 # 9
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.data 0b001000_000000_000000_000000
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print_number__result_string:
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.repeat 0 8
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.data -1
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# end print_number()
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.align 2
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cursor_pos:
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.data 1
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.data 1
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.align 2
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stack:
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.data 0
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