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https://github.com/Asraelite/littlebigcomputer.git
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96 lines
1.5 KiB
Text
96 lines
1.5 KiB
Text
# target parva_0_1
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li sp, stack
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fn tokenize(input) {
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let current_token_ptr = input - 1;
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let temp = -1;
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push(temp); // mark the beginning of the token stack
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loop {
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current_token_ptr += 1;
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let current_token = rw(current_token_ptr);
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if current_token == 0 {
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goto(tokenize_end);
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}
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if current_token == '0' {
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goto(tokenize_symbol);
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}
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if current_token == '9' {
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goto(tokenize_symbol);
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}
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let number_start_addr = sp
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current_token_ptr
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let token_value = current_token - '0';
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lw x3, x2
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blt x3, x4, tokenize__number_gather_end
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bgt x3, x5, tokenize__number_gather_end
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b tokenize__number_gather
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tokenize__number_gather_end:
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li x0, 0 # x0 = sum
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li x7, 1 # x7 = power of 10
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.align 2
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tokenize__number_sum:
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pop x3
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mulu x3, x3, x7
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add x0, x0, x3
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mului x7, x7, 10
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bne x6, sp, tokenize__number_sum
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li x3, 1 # token type = 1 = number
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push x3
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push x0
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b tokenize__loop
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tokenize__symbol:
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xori x3, x3, 42 # todo, set to appropriate value for hashing symbols
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lw x3, tokenize__symbol_hashtable(x3)
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beqz x3, error_invalid_input
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push x3
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b tokenize__loop
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}
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tokenize__shunting_yard:
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pop x3
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bnez x3, 3
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}
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b end
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tokenize__output_queue:
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.repeat 0 40
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tokenize__symbol_hashtable:
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.data 0
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.data 1
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.repeat 0 30 # todo
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error_invalid_input:
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li a0, error_message_invalid_input
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li a1, 1
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call print
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b end
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# function
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print:
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# todo
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ret
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end:
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wfi
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input_string:
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.string_encoding terminal
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.string "125+23*8"
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.string "\0"
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error_message_invalid_input:
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.string_encoding ascii # todo, use correct encoding
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.string "Invalid input\0"
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stack:
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